MARC-15: Broadcast Console Family

RA DIO CON S OLE P RODUCTS
MARC-15
Broadcast Console
family
Technical Manual
May 22, 2017
ARRAKIS
a d va n c e d r a d io
1.0
IN TRODUCTION
Thank you from Arrakis Systems inc.

Thank you for purchasing this product by Arrakis Systems inc. Our company has provided professional audio
equipment to the broadcast, commercial audio, and consumer audio markets for more than 30 years. Our prod-
ucts are sold worldwide and are well known for leading edge technology, quality, and reliability.
Telephone Support for the ‘Free’ DHD-Live software

DHD-Live software for the ARC console is provided at no charge and does not include the cost of telephone support.
The software is specifically designed to be easy to use for people with average PC computer and radio industry
experience. Support is limited to the product manual and the on screen help system in the software itself. Refer to
the Arrakis website at www.arrakis-systems.com for updated training materials. In a case where telephone support
is a necessity, Arrakis has per minute and per incident support available that can be paid for by valid credit card. For
comprehensive support and advanced automation features, please consider one of our automation product. Refer to
the website or contact the factory for details.
How to contact Arrakis Systems
Arrakis Systems inc. is located at Arrakis Systems inc

6604 Powell Street
Loveland, Colorado
80538
Business Hours: 8:00am - 4:30pm mountain time
Contact: Voice: 970-461-0730

Fax: 970-663-1010
email: consolesupport@arrakis-systems.com
web: arrakis-systems.com
Having difficulty contacting Arrakis?

Refer to the website (www.arrakis-systems.com) ARRAKIS
for current contact information
1.1
S A FETY
Safety Instructions
1. Read All Instructions. All safety and operating the type of power supplied to your facility, 16. A Product and Cart Combination should be
instructions must be read before operating the consult your local power company. moved with care. Quick stops, excessive force,
product. 10. Grounding and Polarization. This product is and uneven surfaces may cause the product and
2. Retain All Instructions. All safety and equipped with a polarized AC plug with integral the cart combination to overturn.
operating instructions must be retained for safety ground pin. Do not defeat the safety 17. Servicing. Refer all servicing to qualified
future reference. ground in any manner. servicing personnel.
3. Heed All Warnings. All warnings on the 11. Power Cord Protection. Power supply cords 18. Damage Requiring Service. Unplug this
product and those listed in the operating must be routed so that they are not likely to be product from the wall AC outlet and refer
instructions must be adhered to. walked on nor pinched by items placed upon servicing to qualified service personnel under
4. Follow All Instructions. All operating and or against them. Pay particular attention to the the following conditions:
product usage instructions must be followed. cords at AC wall plugs and convenience a. When the AC cord or plug is damaged.
5. Heat. This product must be situated away from receptacles, and at the point where the cord b. If liquid has been spilled or objects have
any heat sources such as radiators, heat plugs into the product. fallen into the product.
registers, stoves, or other products (including 12. Lightning. For added protection for this c. If the product has been exposed to rain or
power amplifiers) that produce heat. product during a lightning storm, or when it is water.
6. Ventilation. Slots and openings in the product left unattended and unused for long periods of d. If the product does not operate normally
are provided for ventilation. They ensure reliable time, unplug it from the AC wall outlet. This will (following operating instructions).
operation of the product, keeping it from prevent damage to the product due to e. If the product has been dropped or
overheating. These openings must not be lightning and power line surges. damaged in any way.
blocked nor covered during operation. This 13. Overloading. Do not overload AC wall outlets, f. When the product exhibits a distinct change
product should not be placed into a rack unless extension cords, or integral convenience outlets in performance. This indicates a need for
proper ventilation is provided through as this can result in a fire or electric shock hazard. service.
following the manufacturer’s recommended 14. Object and Liquid Entry. Never push objects 19. Replacement Parts. When replacement parts
installation procedures. of any kind into this product through openings are required, be sure the service technician has
7. Water and Moisture. Do not use this product as they may touch dangerous voltage points used replacement parts specified by the
near water—for example; near a bath tub, wash or short-out parts that could result in a fire or manufacturer or that have the same
bowl, kitchen sink or laundry tub; in a wet electric shock. Never spill liquid of any kind on characteristics as the original parts. Unauthorized
basement; or near a swimming pool or the like. the product. substitutions may result in fire, electric shock, or
8. Attachments. Do not use any attachments not 15. Accessories. Do not place this product on an other hazards.
recommended by the product manufacturer unstable cart, stand, tripod, bracket, or table. The 20. Safety Check. Upon completion of any repairs
as they may cause hazards. product may fall, causing serious damage to a to this product, ask the service technician to
9. Power Sources. This product must be child or adult, and serious damage to the perform safety checks to determine that the
operated from the type of power source product. Any mounting of the product needs product is in proper operating condition.
indicated on the marking label and in the to follow manufacturer’s installation 21. Cleaning. Do not use liquid cleaners or aerosol
installation instructions. If you are not sure of instructions. cleaners. Use only a damp cloth for cleaning.
ARRAKIS
1.2
S A FETY
Hazard / Warning Label

Identification
C AU T I O N
RISK OF
ELECTRIC SHOCK
DO NOT OPEN
WARNING: SHOCK HAZARD - DO NOT OPEN

AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
CAUTION : TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

REMOVE ANY COVER OR PANEL. NO USER SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING : TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THE CONSOLE TO RAIN OR MOISTURE.
The Exclamation Point symbol, within an equilateral

triangle, alerts the user to the presence of important
operating and maintenance (servicing) instructions in
product literature and instruction manuals.
The Lightning Flash With Arrowhead symbol, within an

equilateral triangle, alerts the user to the presence of
uninsulated dangerous voltage within the product’s
enclosure that may be of sufficient magnitude to constitute
a risk of electric shock.
WARNING —This equipment generates, uses and can

radiate radio frequency energy. If not installed and used in
accordance with the instructions in this manual it may cause
interference to radio communications. It has been tested and
found to comply with the limits for a Class A computing device
(pursuant to Subpart J of Part 15 FCC Rules), which are designed
to provide reasonable protection against such interference when
operated in a commercial environment. Operation of this equip-ment
in a residential area is likely to cause interference, in which
case the user, at his own expense, will be required to take what-ever
measures may be required to correct the interference.
ARRAKIS
1.3
W A RRA N TY
Warranty
This console carries a manufacturer‘s warranty subject to the following guidelines and limitations:
A) Except as expressly excluded herein, Arrakis Systems inc. (“Seller”) warrants equipment of its own man-
ufacture against faulty workmanship or the use of defective materials for a period of one (1) year from date of
shipment to Buyer. The liability of the Seller under this Warranty is limited to replacing, repairing or issuing cred-
it (at the Seller’s discretion) for any equipment, provided that Seller is promptly notified in writing within five (5)
days upon discovery of such defects by Buyer, and Seller‘s examination of such equipment shall disclose to its
satisfaction that such defects existed at the time shipment was originally made by Seller, and Buyer returns the
defective equipment to Seller’s place of business in Loveland, Colorado, packaging and transportation prepaid,
with return packaging and transport guaranteed.
B) Equipment furnished by Seller, but manufactured by another, shall be warranted only to the extent pro-
vided by the other manufacturer.
C) Thermal filament devices (such as lamps and fuses) are expressly excluded from this warranty.
D) The warranty period on equipment or parts repaired or replaced under warranty shall expire upon the
expiration date of the original warranty.
E) This Warranty is void for equipment which has been subject to abuse, improper installation, improper
operation, improper or omitted maintenance, alteration, accident, negligence (in use, storage, transportation or
handling), operation not in accordance with Seller‘s operation and service instructions, or operation outside of
the environmental conditions specified by Seller.
F) This Warranty is the only warranty made by Seller, and is in lieu of all other warranties, including mer-
chantability and fitness for a particular purpose, whether expressed or implied, except as to title and to the
expressed specifications contained in this manual. Seller’s sole liability for any equipment failure or any breach
of this Warranty is as set forth in subparagraph A) above; Seller shall not be liable or responsible for any busi-
ness loss or interruption, or other consequential damages of any nature whatsoever, resulting from any equip-
ment failure or breach of this warranty.
ARRAKIS
1.4
S OFTW A RE
Software End User License Agreement

This product contains software licensed from Arrakis Systems inc. and possibly from other software companies. Own-
ership of this product constitutes acceptance of this agreement.
1- This product contains intellectual property (i.e. software programs) that are licensed for use by the end user cus-
tomer (hereinafter “End user”).
2- This is not a sale of such intellectual property
3- The End user shall not copy, disassemble, or reverse compile software programs
4- The software programs are provided to the End user “as is” without warranty of any kind, either expressed or
implied, including, but not limited to, warranties of merchantability, and fitness for particular purpose. The entire risk of
the quality and performance of the software program is borne by the End user.
5- Arrakis and its suppliers shall not be held to any liability for any damages suffered or incurred by the end user
(including, but not limited to, general, special, consequential, or incidental damages including damages for loss of busi-
ness profits, business interruption, loss of business information and the like), arising from or in connection with the
delivery, use or performance of the software program.
ARRAKIS
1.5
Table of Contents
Section One Introduction
Section Two Product Description
Section Three Operation Instructions
Section Four Installation Instructions

Getting Started: 4.1 - 4.4
Mainframe: 4.5
Power Supply: 4.6
Cabling 4.7
Gorunding 4.8
Output Module wiring: 4.9 - 4.14
Input Module wiring: 4.15 - 4.19
PC Setup for USB module: 4.20
ARC-16SW: 4.21 - 4.23
Basic Calibration: 4.24
Output Board Calibration: 4.25
Module Jumper setup: 4.26
Summary wiring pages: 4.27 - 4.28
Balanced & Unbalanced: 4.29 - 4.33
Ground loops 4.34 - 4.35
Section Five DHD-Live
Section Six Service and Maintenance
ARRAKIS
1.6
P RODUCT DES CRIP TION
PRODUCT
DESCRIPTION
2.0
Product Description
MARC-15
Modular Advanced Radio Console (MARC)
Three stereo Program output mixes (with mono mixdowns) plus Monitor, Headphone, and Cue systems
15 channel modular mainframe supports many types of input modules (all with LED illumination)
High performance mic modules with 48V phantom power (A/B inputs), (turret control logic & tally for ‘A’ inputs)
Balanced, stereo line level input modules (A/B inputs), (isolated relay source logic for ‘A’ inputs)
Powerful Phone module with hybrid control logic (mainframe supports two phone modules)
USB soundcard input module for playing and recording directly in digital from a Windows PC (one per PC)
Optional Studio Monitor module for Talk studios
Real VU meters monitor all three Output buses
Cue-talkback system with built-in amplifier and speaker
Built-in Timer with manual and automated control
All I/O is by RJ45 connectors and ten foot wiring is supplied with RJ45 at one end and unterminated at the other end
Optional 16 x 3 stereo switcher for remote input select... handles large studio jobs
The MARC-15 modular analog console comes in a single 15 channel mainframe size with a wide variety of input and option module
configurations. The console supports two phone modules for use with external hybrids. All switches are LED illuminated and ICs
are socketed (not surface mount) for reliability. Machine source control is by isolated reed relays. The meter panel hinges up
and back for access to I/O connectors and input trimpots. All I/O is by RJ45 connectors and ten foot wiring is supplied with
RJ45 at one end and unterminated at the other end (an expensive option in competing products). The MARC-15 is a very low pro-
file, attractive, tabletop design that is flexible, easy to install, reliable, and ideal for any on air or production Radio application.
2.1
The modular mainframe...

The MARC-15 is available in a single 15 channel mainframe. The mainframe is a fully enclosed metal cabinet with a rear hinging meter
panel. The power supply is an external, autosensing 110-220VAC module. The meter panel contains meters for all three buses, a digi-
tal timer, and a built in cue/talkback speaker.
The console is compact, low profile,

and a tabletop mount design
Width: 37 1/2"
Depth: 20"
Rear height: 6 3/4"
Front Height: 2 1/8"
The meter panel hinges for

access to console I/O and
trimpots
2.2
Many modules to choose from...

The ‘Output’ module comes standard with the console. The 8, 12,
and 15 channel base models can then be configured with any com-
bination of input modules that you choose. There can be a maxi-
mum of one ‘PC USB’ module per PC, two ‘Phone modules’, and one
‘Studio monitor’ module per mainframe. Any number of mic or ste-
reo line modules can be added until the 15 open modules in the
mainframe are full.
Input modules Option Output module
Mic Stereo PC USB Phone Studio Output / Monitor / Timer

module line module module monitor Module
(MARC-MIC) module (MARC-USB) (MARC-PHN1 module (MARC-OB)
(MARC-STL) MARC-PHN2) (MARC-STM)
A/B A/B Rec Off

line Ext1 Reset Ext1
ord
Pgm Pgm Pgm Pgm Pgm Start Pgm
Aud Aud Aud Aud Aud Stop Aud
Utl Utl Utl Utl Utl Auto Utl
Cue Cue Cue Cue Timer
Talk to
Studio
Cue
Head
phone
Monitor
Mic Line PC USB Phone Studio Output Timer
2.4
Software features
the optional PC USB module contains a built-in, Windows compatible,
USB sound card for USB connection to a PC. (maximum of one module
per PC)
‘Free’ DHD-Live software for ‘Live On Air’ with the MARC-15

Arrakis DHD-Live software will recognize the PC-USB module in the
MARC-15 console and operate in the ‘free’ mode to provide ’Live On
Air’ features that are ideal for broadcast, internet, or podcast style
radio applications.
Included with an ARC series console (with a USB channel) is a free copy of DHD-Live. This software is the ultimate live assist tool for anyone
who wants to put on a dynamic and powerful live show. It includes features that give you unprecedented customization and flexibility. We are
confident that you will love this software.
This software is intended only for Live Assist. This means that it will not be capable of playing unattended such as with an Automation product
like Digilink-HD. If you are looking for a full featured automation system that can play unattended, please consider one of our automation
product, such as Digilink-HD, Digilink-Xtreme or New~Wave. Visit our website for more details.
Installation
To download the software, please go to this link here: http://arrakis-systems.com/download.html
This download will contain a full copy of the DHD-Live manual and an install EXE program. Follow the instructions on the website to install. All
files will be installed to the C:DHD folder. To uninstall, simply delete the C:DHD folder.
This software, along with the latest version of the Operations Manual can always be found on our website for download.
Updates
The DHD-Live software and training material will be updated on a regular basis, without notice. Please visit our website to get the latest
updates.
Support
The software is specifically designed to be easy to use for people with average PC computer and radio industry experience.
Support is limited to the product manual and the on screen help system in the software itself. Refer to the Arrakis website at
www.arrakis-systems.com for updated training materials. In a case where telephone support is a necessity, Arrakis has per minute
and per incident support available that can be paid for by valid credit card. For comprehensive support and advanced automation
features, please consider one of our automation product. Refer to the website or contact the factory for details.
Feedback
DHD-Live is an evolving software that will be updated on a regular basis. As such, we greatly appreciate any customer feedback. This may
include reporting issues with the software, or features that you would like to see added. Please visit our website to submit your requests.
To contact one of our support agents, please email:

dhdlivesupport@arrakis-systems.com
2.5
Technical features
The MARC-15 console by Arrakis Systems inc. is the culmination of > 25 years of leadership in the design of analog and digital Radio
consoles and > 15 years as the leader in hard disk automation for Radio.
Mechanical
Switch type: momentary, 5 million operation, for all front panel switches
Switch illumination: LED, no incandescent lamps to burn out
Linear Fader type: conductive plastic for highest possible resolution and life
Rotary Fader type: conductive plastic for highest possible resolution and life, 15,000 cycles
Rotary fader attachment: ribbon cable to a plug on the module
IC sockets: all socketed for ease of service
VU meters: true VU ballistics
Electronic
Audio switching: electronic switching with CMOS ICs for ultra high performance and reliability (no switches to clean)
Audio level adjust: for the ultimate in audio performance, audio is passed through the linear and rotary faders
Operational amplifiers: NE5532
Mic preamp: SSM2019, high performance IC with 1.5dB noise figure and .01% THD at gain = 100
Phantom power: 48VDC, with external power supply
Logic ICs: advanced CMOS logic for high noise immunity
Logic
Muting: reed relay isolated (50 milliamps max)
Mic Turret logic: on-off-cough-talkback-tally, buttons require dry closure to ground, tally is to ground
Channel Source control: on and off, reed relay isolated (50 milliamps max)
2.6
Electronic Specifications
Stereo Line Input
Freq Response- +(-).5dB 20-20kHz
S/N- -82dB typ, +8dBu in, +8 dBu out
THD- .01% typ, +8dBu in, +8 dBu out
CMRR- -75dB typ 1kHz
Max Input- +23dBu, balanced
Mono Mic Input
Freq Response- +(-).5dB 20-20kHz
EIN- -115dBu typ, -50dBu in, +8 dBu out
THD- .05% typ , -50dBu in, +8 dBu out
CMRR- -60dB typ 1kHz
Impedances
Mic Input- > 2000 ohms
Line Input- > 10000 ohms
Outputs- < 100 ohms
System
Max Output- +23dBu balanced
Stereo Separation- -75dB typ 1KHz
Pgm to Aud XTalk- -80dB typ 1KHz
-70dB typ 20kHz
Cue to Pgm XTalk- -90dB typ 1KHz
-75dB typ 20kHz
On Air Light Logic: reed relay, 50mA max
Power Supply
110vac - 220 VAC,
50-60 hz, autosensing
Certified: UL, CE, CS, CB
External inline module:
3"W x 5 3/4"L x 1 3/4"D
2.7
Physical Specifications
Arrakis Systems inc.
A/B A/B A/B A/B A/B A/B A/B A/B A/B A/B Off Off Ext1 Auto Ext1
A/B
line line
Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Start Pgm
Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Stop Aud
Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Reset Utl
Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Timer
Talk to
Studio
Cue
Head
phone
Monitor Monitor
Mic 1 Mic 2 PC USB Phone 1 Phone 2 Studio Output Timer Control

Room
37 1/2"
The console is compact, low profile,

The meter panel hinges for access 6 3/4" and a tabletop mount design
to console I/O and trimpots 0.315
0.365
2 1/8"
20"
POWER SUPPLY
110vac - 220 VAC, 50-60 hz, autosensing Certified: UL, CE, CS, CB
External inline module: 3"W x 5 3/4"L x 1 3/4"D
PHYSICAL SPECIFICATIONS
Dimensions - Depth - 20",
Height - 6 3/4"
Width- 37 1/2"
2.8
OP ERA TIN G IN S TRUCTION S
OPERATING
INSTRUCTIONS
3.0
Basic Operation
The MARC-15 console is designed to be very easy to use. The three sets of VU meters follow the Program and Audition and
Utility buses. The phone system is very easy to use for off line talking to the caller as well as supporting a Live call in show
or Off-line contest call application.
VU Meters
Lighted switches Cue speaker & Volume
Timer REAL VU meters for accu-
5 million operation, rate ballistics tor ALL the for cueing audio and
60 minute up
LED lighted switches output buses Talkback from a Studio
timer
Control Room
Monitor
Selectable between
A/B A/B A/B A/B A/B A/B A/B A/B A/B A/B A/B Rec
ord
Off
line
Off
line
Ext1 Reset Ext1
an external (air)
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Pgm
Aud
Start
Stop
Pgm
Aud
input, Program,
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl
Cue
Utl Auto
Timer
Utl
Audition, & Utility.

The output is line
Talk to
Studio
Cue
level for external
Head
powered speakers
phone
Monitor
Headphones
Studio
Mic 1 Mic 2 PC USB Phone 1 Phone 2 Output Timer
Monitor
follows the
control room
Stereo Line modules selector switch. The
Mic modules
amp drives Hi-Z & 8
High performance mic For CD players, MP3 play-
ohm headphones
modules for control ers, and other analog
room mics or talk sources. Phone modules
studio mics. Studio Monitor module
The phone modules work with an This module provides a sepa-
external hybrid (user supplied) rate monitor and headphone
PC modules through both audio and logic feed for use with a separate
When connected to a Windows PC connections. Turn the Cue button talk studio. The ‘Talk’ button
(via a USB cable) running Arrakis on to listen off-line to the caller. will feed the control room mic
DHD-Live software, the channel On- Push the Off-line switch to use through the studio monitor
off button will start and stop play- the Control room mic to talk off- and headphone speakers for
back of audio from the PC. The line to the caller. To place the an intercom function.
Record button will start and stop a caller on air just select a bus
PC recording. and turn the channel on.
3.1
Mono mic level Input Modules

A/B INPUT SELECTOR
The module can select between two microphones. The ‘A’ input is activated
when the button is NOT lit. The ‘B’ input is active when the module is lit.
CHANNEL ON AND OFF

A / B Input
To turn a channel on, simply push the green ON switch at the bottom of the
selector
fader. When the channel is on, the switch will be lighted. To turn the chan- A/B
nel off, simply push the yellow OFF button. Program Bus
Assignment Pgm
CHANNEL ON AND OFF LOGIC Audition Bus

Aud
The mic channel has support for a control turret. The logic controls: chan- Assignment Utl
nel on, channel off, LED tally of channel on-off, cough, and talkback to con- Utility Bus
Cue
sole cue system. Assignment
OUTPUT BUS ASSIGNMENT Cue Bus

Assignment
The green PGM and AUD and UTL buttons above the slide fader assign the Tally light
channel to any (or all) of the main audio mixing buses: Program & Audition
& Utility. Push the button once to light the button and assign it to the bus.
Push the lighted button again to unassign the channel from the bus. Slide fader
Level control
CUE
The cue button is a status lamp indicating whether cue has been activated
by turret logic from a remote studio. When lighted, the mic in the remote Channel
On & Off
studio has been placed into the cue system for talkback from that mic. switches
Mic
Note: this cue switch does NOT activate cue in the control room because
this would cause feedback between the cue speaker and the mic.
MUTE
When the channel is turned on, the monitor and cue speakers are muted
to stop feedback between those speakers and the microphone. Muting
occurs on both the ‘A’ and ‘B’ inputs.
3.2
Stereo Line Level Input Module

A/B INPUT SELECTOR
The module can select between two stereo input sources. The
‘A’ input is activated when the button is NOT lit. The ‘B’ input is
active when the module is lit.
CHANNEL ON AND OFF

A / B Input
To turn a channel on, simply push the red ON switch at the bot- selector
tom of the fader. When the channel is on, the switch will be A/B
Program Bus
lighted. To turn the channel off, simply push the yellow OFF but- Assignment Pgm
ton. Aud
Audition Bus
CHANNEL ON AND OFF LOGIC Assignment Utl
The stereo line level channel has support for a control turret Utility Bus
Cue
for use if an external mic preamp is used. The logic controls: Assignment
channel on, channel off, LED tally of channel on-off, cough, and
Cue Bus
talkback to console cue system. Assignment
The module also has logic to start and stop a source device on Slide fader
the ‘A’ input. The ‘B’ input does not have source control logic. Level control
The start command is sent when the channel is turned on and
the stop command is sent when the module is turned off.
OUTPUT BUS ASSIGNMENT

Channel
The green PGM and AUD and UTL buttons above the slide fader On & Off
assign the channel to any (or all) of the main audio mixing bus- switches
es: Program & Audition & Utility. Push the button once to light Line
the button and assign it to the bus. Push the lighted button
again to unassign the channel from the bus.
CUE
To activate cue, click on the yellow CUE button above the fader.
To exit the cue mode, click on the CUE button again.
Cue audio will be heard in the speaker in the VU meter housing

and in the Headphones. Cue logic automatically switches the
Headphones from the selected audio source to the cue audio
bus whenever any channel is placed into cue.
3.2
The PC-USB input Module
CHANNEL ON AND OFF

To turn a channel on, simply push the red ON switch at
the bottom of the fader. When the channel is on, the Record
switch will be lighted. To turn the channel off, simply button
Rec
push the yellow OFF button. Program Bus
ord
Assignment Pgm
CHANNEL ON AND OFF LOGIC Aud

Audition Bus
When the module is controlling Arrakis Xtreme soft- Assignment Utl
ware, the channel on will start the playlist on the PC to Cue

playing. When the channel is turned off, the playlist will Utility Bus
stop playing. This allows logic functionality similar to a Assignment
multideck cart machine. Cue Bus
Assignment
The green PGM and AUD and UTL buttons above the Slide fader
slide fader assign the channel to any (or all) of the Level control
main audio mixing buses: Program & Audition & Utility.
Push the button once to light the button and assign it
to the bus. Push the lighted button again to unassign
the channel from the bus. Channel
On & Off
CUE switches
PC USB
To activate cue, click on the yellow CUE button above
the fader. To exit the cue mode, click on the CUE button
again.
Cue audio will be heard in the speaker in the VU meter The PC USB module is ideal for interfacing the con-
housing and in the Headphones. Cue logic automatically sole with a Windows PC (XP or VISTA). Because the
switches the Headphones from the selected audio hardware is Windows compatible, both Arrakis soft-
source to the cue audio bus whenever any channel is ware and 3rd party software (such as Adobe
placed into cue. Audition) will recognize and play/record from the
module. The Arrakis software is also controlled by
the module channel on-off switches to start and
stop the playlist just like a cart stack. The Record
button starts and stops a manual record from the
front panel of the module. Powerful Arrakis DHD-
Live software is supplied free with this module and
full automation software is available as well under
the Arrakis Xtreme-Solutions program.
3.3
The Telephone Input Module

OFF-LINE ASSIGNMENT SWITCH
This switch will connect the control room mic to the caller and feed the caller to the
console cue system. The caller will be automatically removed from the Pgm, Aud, and
Utlk buses so he will not be on air. This allows the caller and the console operator to
speak ‘off-line’.
Off-line
CHANNEL ON AND OFF Assignment
To turn a channel on, simply push the red ON switch at the bottom of the fader. When Off
line
the channel is on, the switch will be lighted. To turn the channel off, simply push the Program Bus
Assignment Pgm
yellow OFF button.

Aud
Audition Bus
CHANNEL ON AND OFF LOGIC (Hybrid control) Assignment Utl
The phone channel provides momentary, relay isolated logic to pick up the caller line Utility Bus
Cue
(start) and to release the phone line (stop) Assignment

Cue Bus
The green PGM and AUD and UTL buttons above the slide fader assign the channel to
Assignment
any (or all) of the main audio mixing buses: Program & Audition & Utility. Push the but-
ton once to light the button and assign it to the bus. Push the lighted button again to Slide fader
unassign the channel from the bus. Level control
HYBRID AUDIO FEED

The output to the phone hybrid that the caller will hear is determined by the module’s
output bus assignments. The caller will hear a mix of all three output assignments. To
Channel
eliminate feedback, the output to the phone hybrid will NOT include the phone callers
On & Off
voice. This is call mix-minus. switches
Phone
CUE
Cue will switch the caller into the cue system for listening to him without him being
on air.
To activate cue, click on the yellow CUE button above the fader. To exit the cue mode, IMPORTANT
click on the CUE button again. Two phone modules can be placed in
a single mainframe. They are...
Cue audio will be heard in the speaker in the VU meter housing and in the Headphones. 1) MARC-PH1
Cue logic automatically switches the Headphones from the selected audio source to 2) MARC-PH2
the cue audio bus whenever any channel is placed into cue.
Two PH1s or two PH2 modules should
TWO PHONE MODULES not be used in the same mainframe
The mainframe supports either one or two phone modules. Each requires its own
hybrid. The audio feed to the hybrid includes the audio from the OTHER phone module.
3.4
The Control Room Monitor system

The Control Room Monitor system is the main audio moni-
toring system for the studio. It features an input selector
switch and a volume level control. The output of the monitor
system is connected to an external audio power amplifier
and speakers. The level control on the external amplifier
should be set for the maximum sound level desired in the Monitor
studio. selector
Auto Ext1
MONITOR MUTING Start Pgm
When a control room microphone module is turned on, the

Stop Aud
monitor system will mute (audio is turned off) so that there
will not be feedback from the speakers to the microphone. Reset Utl
Timer
MONITOR SELECTOR SWITCH

This switch selects the audio source for the Monitor sys-
tem.
1) AIR- this is usually an off air audio feed to monitor the Cue
actual transmitted signal Monitor

2) PGM- the main Program output bus from the console Volume
3) AUD- a secondary Program bus that can be used for Head
phone
several purposes such as Recording
4) UTL- a secondary Program bus that can be used for
several purposes such as Recording
Monitor
MONITOR VOLUME FADER

Sets the monitor level into the external audio amplifier and Output Timer
speaker.
3.5
The Headphone system

The Headphone (earphone) system in the MARC-15 console is provided
so that audio can be listened to while the microphone is active and the
monitor speakers are muted. The Headphone system receives the
same audio feed as the Monitor system but does not mute when the
microphone channel is turned on. The Headphone system has a 1/4"
headphone jack on the front of the module The headphone amplifier Audio
connected to the headphone jack is designed to work with high imped- selector
ance and 8 ohm headphones. The module also has a balanced, line Auto Ext1
level audio output for use with an external headphone amp. Start Pgm
Stop Aud
CUE
The MARC-15 console features Autocue. Whenever a channel is placed Reset Utl
into cue, the audio in the Headphone system will mute and the Cue Timer
audio will play over the Program signal. Headphone

Volume
TALKBACK
When talkback logic is activated from another studio, then Auto-cue is Cue
activated, Headphone program audio is muted, and the audio from the
Talkback input is placed into the Headphone system for intercom.
Head
phone
MUTING
The headphone system is not muted. When the control room micro- Headphone
Jack
phone is turned on, the Monitor system will mute (audio is turned off)
so that there will not be feedback from the speakers to the micro- Monitor
phone. The headphone system can not have audio feedback so muting
is not required. Output Timer
MONITOR SELECTOR SWITCH

This switch selects the audio source for the Monitor & Headphone
systems.
1) AIR- this is usually an off air audio feed to monitor the actual
transmitted signal
2) PGM- the main Program output bus from the console
3) AUD- a secondary Program bus that can be used for several pur-
poses such as Recording
4) UTL- a secondary Program bus that can be used for several pur-
poses such as Recording
HEADPHONE VOLUME FADER

Sets the headphone level to the internal headphone amplifier.
3.6
The Cue system

The cue system is designed for monitoring an audio source
without placing it on air. This feature is useful for listening
to a network feed before bringing it to air, listening to a CD
to be certain it is the correct song, etc.
ACTIVATING CUE Auto Ext1
To activate cue, click on the CUE button on an input source chan- Start Pgm
nel. To exit the cue mode, click on the CUE button again. The cue Stop Aud
signal is PRE-fader and therefore the fader level and the channel Reset Utl
ON-OFF status has no effect on the cue signal.

Timer
CUE AUDIO
Cue audio will be heard in the built in Cue speaker and the Head-
phones. In the Headphone system, Autocue will mute the Pro- Cue
gram in the headphones and play the cue audio over top of pro-
gram audio.
CUE LEVEL
CUE FADER CONTROL
Head
phone
The cue fader adjusts the level in the internal cue speakers. It
does not adjust the level of the cue in the headphones.
Monitor
MUTING
The cue speaker audio will be muted to stop feedback whenever
Mic channels One or Two are turned on by their respective On- Output Timer
off switches.
CUE SPEAKER
3.7
The Timer
The MARC-15 console features a 60 minute up timer. The timer is con-
trolled by four buttons on the output module. MANUAL
CONTROLS
MANUAL MODE RESET
When the Auto button light is lit, the timer is in the manual mode and resets the
will respond to the Start, Stop, and Reset buttons. The manual mode is timer to
active when the console is first powered up. zero
START Reset Ext1
AUTO MODE starts the Start Pgm
When the Auto button is NOT lit, the timer is in auto mode. When in timer
Stop Aud
auto mode, the timer will reset to zero and start timing whenever a STOP
module is turned on.
Auto Utl
stops the
timer Timer
A jumper on each module determines whether a module will trigger

the timer if the timer is in auto mode. As set from the factory, all AUTO
if NOT light-
non-mic modules are set to trigger the timer when in auto mode. ed, then Auto Cue
is on and the
timer will not
respond to
the manual
Head
controls. The phone
timer will
reset to
zero and
start timing Monitor
whenever a
console
Output Timer
module is
turned on
Timer
Arrakis Systems inc. Program Audition Utility
3.8
The VU meters
The MARC-15 console features a set of VU meters for all of the console mixing buses (Pgm and Aud and UTL).
This simplifies operation and reduces operator error.
Program Meters Audition Meters Utility Meters
3.9
IN S TA LLA TION IN S TRUCTION S
INSTALLATION
INSTRUCTIONS
Getting Started: 4.1 - 4.4
Mainframe: 4.5
Power Supply: 4.6
Cabling 4.7
Gorunding 4.8
Output Module wiring: 4.9 - 4.14
Input Module wiring: 4.15 - 4.19
PC Setup for USB module: 4.20
ARC-16SW: 4.21 - 4.23
Basic Calibration: 4.24
Output Board Calibration: 4.25
Module Jumper setup: 4.26
Summary wiring pages: 4.27 - 4.28
Balanced & Unbalanced: 4.29 - 4.33
Ground loops 4.34 - 4.35
4.0
Basic Description Standard cables (supplied)
Fast & easy installation

All IO is by World standard RJ45 connectors
Cables with RJ45s on one end are supplied standard with the MARC-15
Optional cables are available with XLR and RCA on one end for convenience
The MARC-15 is quick and easy to install. The meter panel hinges up and back to
provide fast access to the RJ45 IO connectors and trimpots. The cabling exits
through the bottom rear of the console and can be either through the table or
simply out the rear of the console above the tabletop.
Ten foot cables (molded RJ45 on one end other end
Ten foot cables (connectorized at one end with molded RJ45 connectors) are open) are supplied standard with the MARC-15
provided for the output module and the ‘A’ inputs for the input modules.
(NOTE: the cables as shipped are 20-25' with connectors at BOTH ends. The
cables are then cut in the middle to the needed length. By doing it this way, a
optional cables
20' cable can be cut into a 3' and 17' cable) Arrakis can supply the audio and
logic cables wired on both ends
The power supply is an external ‘brick’ type module that supports 110VAC - for your studio.
220VAC for domestic or international installations. It simply plugs into the rear
of the console.
The meter panel hinges for access

to console I/O and trimpots
Cables exit the rear bottom

of the console.
4.1
Unpacking
a) PACKING SLIPS- do you have everything?
Check the Packing Slips that come with the shipment to
be certain that all packages have been received.
b) CHECK FOR DAMAGE

Check all packages and equipment for damage IMMEDI-
ATELY upon receipt.
If damage is found, contact Arrakis Systems immediate-

ly to report the damage. (refer to inside cover of this
manual for contact information)
c) CAREFULLY GO THROUGH EACH BOX

Arrakis inspects every shipment for accuracy. You will
receive all of the appropriate documentation, install kit,
spare parts kit, and equipment. Be very careful to not
throw away anything if you decide to throw out the ship-
ping materials.
d) KEEP ALL PACKING MATERIALS

Arrakis consoles are shipped in custom shipping con-
tainers. Keep all containers at least until the installation SAVE ALL PACKING MATERIAL
is complete. This is in case some piece of equipment
may need to be returned to the factory for service.
It is a good idea to keep the shipping materials for the

life of the product. Arrakis is not responsible for ship-
ping damage to products not shipped to the factory in
the original packing materials.
4.2
Before you start

a) PHYSICAL SPACE
It is important to install the console with sufficient space around it to operate and service the console
easily.
b) AREA IN FRONT OF THE CONSOLE

It is normal to have 8-10" between the front of the console and the front of the table so that a piece of
paper may be laid on the table in front of the console.
c) SCRIPT OR COPY BOARD

Are you going to use a copy bridge that span the top of the console for paper or other objects. A copy
bridge can allow the console to be placed close to the front of the table in tight rooms.
d) ADEQUATE VENTILATION
It is important to provide adequate ventilation to electronic equipment. High temperatures can reduce the
life of equipment.
e) 110V - 220VAC OPERATION

The console comes with a 110VAC-220VAC autosensing external power supply as standard equipment.
f) STATIC
Static discharge to electronic devices can cause damage, reduce performance, or cause noise in the sys-
tem. Proper choice of carpet is an important consideration when building a studio.
g) THE CONSOLE POWER SUPPLY

The console is powered by an external, regulated power supply. The supply simply plugs into the back of
the console. There are no high voltages within the console
4.3
Getting started... a MUST Read !

a) CONSUMER SOURCE EQUIPMENT
The MARC-15 console is designed to be used with balanced professional & unbalanced consumer type audio source equipment such as CD players,
MDs, DAT machines, cassette machines, etc. Unbalanced consumer equipment is designed to perform well in compact studios where audio cables
are short. Balanced audio is required when connecting multiple studios or with long audio cable runs ( > 10 feet). When choosing consumer audio
equipment, choose double insulated equipment that has 2 prong AC power plugs (not the 3 prong plugs).
b) AC POWER CONSIDERATIONS
Plug all of the equipment in your studio into a single AC power strip!
Unbalanced consumer source equipment is not designed to reject AC power line hum. This makes it important to put ALL of the equipment
in the studio on the same branch of the AC power and preferably on a single AC power outlet. A single power outlet will have a 1500-2000 watt
capacity. That is plenty of power for most studios. Simply plug a multi-outlet AC power strip into the single wall outlet and then all of your equip-
ment into the power strip. If possible, the power strip should be the kind that has internal surge protection.
Because many buildings have as many as 8-12 duplex wall outlets on a single 1500-2000 watt branch, you must have NO other equipment
on any of those 8-12 other outlets. Make sure the branch your outlet is on does not also power the lights or any other building equipment.
c) SOME THOUGHTS ABOUT 60 CYCLE HUM (or some ideas about what to do if you get it)
The RCA audio cables used in consumer audio equipment connect the chassis ground and signal ground of all of the equipment in the studio togeth-
er through the cable shield. All shield ground connections should be as tight and low impedance as possible. Use only high quality RCA (IHF) audio
cables.
Most consumer audio equipment will have a 2 prong AC power plug. Some equipment has a 3 prong AC power plug. The third prong on a 3
prong plug is a “Safety Ground” which grounds the chassis to reduce shock hazard. The 3rd prong must never be removed even though it creates
a 2nd ground path along with the audio cable shield ground. Two ground paths creates a “Ground loop” antenna which picks up 60 cycle AC hum. If
possible, use only equipment that has 2 prong AC power plugs. With stubborn hum, replace the equipment with 3 prong AC power plugs with equip-
ment with 2 prong AC power plugs. This is often less expensive that making a custom audio cable with audio transformer isolation.
If there is NO other ground connected to the studio, a single piece of equipment with a 3 prong AC plug does not create a ground loop.
However, if there is another ground (such as from another studio) or a 2nd piece of equipment with a 3 prong AC power plug, then a ground loop is
completed. If you can not change to two prong equipment, it may be necessary to use an audio isolation transformer on the audio cable to break
the audio ground path. Contact a technician or the factory on how to build a transformer isolated audio cable.
In some stubborn cases of hum (or RF interference), the best solution is to make the ground resistance between ALL of the equipment
as low as possible. To do this, connect all of the equipment chassis’ together with #12 stranded, insulated wire. Each piece of equipment is to have
its own wire that returns in a star configuration to a single point in the studio. That single point should return by a single ground wire back to the
main station ground. A 2"-4" copper ground strap to station ground is best.
d) CONNECTING MULTIPLE STUDIOS

When connecting multiple studios, long audio cables are sometimes necessary. These long cables can introduce AC hum into your audio. In these
cases, it may be necessary to use distribution amplifiers with balanced inputs and outputs (or audio isolation transformers) to break the ground
path and to cancel the AC hum.
e) STEP BY STEP INSTALLATION PROCEDURE

When building a studio, it is important to be able to isolate problems that may be causing noise, hum, or even not passing audio. To do this properly,
the studio should be assembled and tested one piece of equipment at a time. Each problem is detected and eliminated as it occurs.
4.4
The Mainframe
a) MOUNTING
The mainframe is tabletop mounted. It does not require screwing down to the table surface.
b) CABLE INGRESS AND EGRESS

All cables enter and exit the console at the rear of the mainframe.
c) ACCESS TO THE CONSOLE CONNECTORS

The mainframe VU meter panel hinges back to provide access to the console wiring area. The motion of the VU meter panel is NOT
limited so be careful to not scratch the paint or drop the panel.
d) MDOULE CONNECTORS
All module connectors are RJ45s that plug into the rear of each module as illustrated below.
#6 screw ground lug for grounding the

mainframe to the stationground
e) MAINFRAME GROUND
A threaded screw ground lug is provided
on the motherboard panel, beneath the VU
meter bridge, on the left side of the con-
sole (as viewed from the front).
Connect the main station ground to this

screw lug to ground the console.
4.5
Power Supply
Main Power Supply
The power supply is an external regulat-
ed supply as illustrated below.
The DC power connector plugs into the

hole in the rear of the mainframe as
shown. The indented key tab on the DC
power connector faces up. The connec-
tor is recessed a couple of inches into
the frame.
NOTE: the recessing of the connector can

make it difficult to plug in. It is much eas-
ier to plug the connector in from the
rear of the console than from the front.
48 VDC Phantom Power Supply
48 VDC Phantom Power Supply The phantom power supply is also exter-
The phantom power supply is also external and is plugged into this hole
nal and is plugged into a hole near where
the main power supply is plugged.
MAIN POWER SUPPLY

110vac - 220 VAC,
50-60 hz, autosensing
Certified: UL, CE, CS, CB
External inline module:
3"W x 5 3/4"L x 1 3/4"D
4.6
Cabling
The cables supplied with the MARC-15 are #24 gauge, stranded, CAT5, 20-25 feet long, with RJ45 connectors on
both ends. Each cable is intended to be cut into two cables with an RJ45 connector at one end and for the other
end to be wired to the specific connector for the equipment on the other end.
Shield ground
The RJ45 cables supplied with the MARC-15 are shielded. They have a shield drain wire. This drain wire should
be grounded on the connector at the equipment end of the cable or at the punch block, not at the console end.
Mic Cables
The mic module has shield grounding RJ45 connectors at the module. The shield is therefore grounded through
the module.
Standard cables (supplied)
EIA/TIA 568B WIRING STANDARD COLORS

PIN Wire Color Audio 1,2,3,4,5,6,7,8
1 White w/Orange Stripe Left (+)
2 Orange w/White Stripe Left (-)
3 White w/Green Stripe Right (+)
4 Blue w/White Stripe Ground
5
6
White w/Blue Stripe
Green w/White Stripe Right (-)
RJ45
7 White w/Brown Stripe
8 Brown w/White Stripe
Ten foot cables (molded RJ45 on one end other end

open) are supplied standard with the MARC-15
4.7
Grounding
THE BASICS OF GROUND SYSTEMS (IMPORTANT)
1) MANY TYPES OF GROUNDS

Because there are several electrical systems in a broadcast facility, there are also several ground systems in the facility. Each
ground system fulfills a different function. Understanding these ground systems is important to be able to properly design and
debug an audio facility.
2) AC POWER GROUND
AC power wiring has a “hot” wire (typically 110VAC) and a “ground” wire. The ground wire is the return path for currents in the
“hot” wire. The ground wire is not a perfect zero resistance so a small 60 cycle voltage exists on the ground wire.
3) AC SAFETY GROUND (Equipment Chassis Ground)

The AC power system has a 3rd conductor which is a “safety” ground. This 3rd conductor is connected to the 3rd prong on the
AC outlet. On equipment with a 3rd prong on their AC plug, this safety ground is usually connected to the metal chassis of the
product. If something should happen that connects the “hot” 110VAC wire to the metal chassis of the product, then the safety wire
will throw the circuit breaker and the lethal voltage will be removed from the chassis. While there is usually no current on this
wire, it is often run in series to many parts of the building and is not a quality ground reference.
4) RF SHIELDING GROUND
The audio signal cables used to connect two or more pieces of audio equipment usually have a metal foil shield surrounding the
signal wires inside the cable. This metal shield protects the sensitive audio signal wires from electronic noise that would contami-
nate the audio signal. The shield is connected to a ground to drain the interfering electronic noise away from the audio signal. The
shield should always be grounded at one end only so as not to create a ground path between the connected equipment.
5) AUDIO SIGNAL GROUND... MUST BE KEPT NOISE FREE

Each piece of electronic audio equipment has an internal DC power supply which provides a DC voltage and a ground to the inter-
nal circuits. This ground is often called the “audio ground,” “circuit ground,” “signal ground,” etc. The internal audio ground is
connected to all of the various circuits inside the device. Whether the audio equipment is professional balanced equipment or
unbalanced consumer equipment, any noise that reaches the audio signal ground inside the equipment will be coupled into the
audio signal itself and appear at the audio output of the device. It is extremely important that the audio ground be as free from
noise as possible. This makes it important for the audio signal ground to not be connected to AC Power ground, AC Safety ground,
or RF Shield ground.
6) REAL WORLD SYSTEMS HAVE MIXED GROUNDS

In real world audio equipment, several ground systems connect to each audio device. Which ones are connected to the audio sig-
nal ground vary from product to product. Most consumer products are “double insulated” and do not have a 3rd wire safety
ground to introduce noise. However, most professional audio products connect the 3rd wire safety ground directly to the prod-
uct’s chassis and the audio signal ground which does introduce noise. In consumer products the cable shield ground is the audio
signal ground while in professional products, the cable shield may (or may not) be connected to the audio signal ground.
4.8
Grounding (continued)
GROUNDING THE MARC-15 CONSOLE
1) CONSOLE CHASSIS GROUND
The chassis of the MARC-15 is floating. It is NOT connected to ground at all. This is because the power for the console is provided
by an external power supply and only low voltages exist in the console. However, to maximize safety, minimize static shock prob-
lems, as well as for RF shielding reasons, the console chassis should be grounded. This is accomplished by grounding the console
to station ground via a screw on the mainframe mounting panel under the meter panel. (refer to ‘Mainframe Grounding’ in Section
4.5. ).
2) AC POWER GROUND
Be certain that the entire studio is on the same branch of AC power. The easiest way to do this is to use only a single power strip
for the studio. Different studio equipment on different branches of AC power often causes a ground loop and hum. Do not have
lights or any other equipment on the same branch as the studio power.
3) CABLE SHIELD GROUNDS & PUNCH BLOCKS

If punch blocks are used, the shield drain wire from the RJ45 cables provided with the console should be grounded at the punch
block, not the console. The punch block can then be grounded to the main station ground.
4) CABLE SHIELD GROUNDS & WIRING DIRECTLY TO EQUIPMENT

If the console is wired directly to source or other equipment, ground the shield drain wire at the equipment end, not the console.
Never ground the shield at both ends. This usually causes a ground loop and hum.
5) AUDIO SIGNAL GROUND AND BALANCED EQUIPMENT

If at all possible, use only professional balanced audio equipment. With this equipment, audio signal grounds are not connected and
only balanced signals pass between them. The balanced amplifiers in the system null out the noise introduced in the cables.
6) AUDIO SIGNAL GROUND AND UNBALANCED (CONSUMER) EQUIPMENT

If unbalanced consumer equipment is used, then the audio signal ground of the consumer product and the console audio signal
ground are connected. In these cases, try to keep wiring short (less than 10 feet). Also, try to purchase equipment that is double
insulated (does not have a 3rd prong on the AC power plug). If there is a third prong on the consumer equipment, then the audio
signal ground is also connected to the AC safety ground of the building which can introduce noise and cause ground loops.
7) STATION GROUND
In general, the station will have a copper rod driven several feet into the ground as the main station ground point. A copper
ground strap (2-4") or large ground cable (#14 or larger) runs from the station ground to EACH studio separately. This forms a
‘STAR’ ground system. More than one studio should not be on the same ground cable.
8) MORE INFORMATION...
For much more information on studio wiring systems, go to to the Console section of the Arrakis website (www.arrakis-
systems.com)
4.8
Monitor amp & Speaker Wiring

The console has a balanced, line level monitor audio output that is designed to connect to an external audio power amplifier.
The console output will not directly drive speakers.
Connect the audio amplifier input to the console Monitor Output on the back of the output module as shown below. Follow the
amplifier’s instructions and connect speakers to the amplifier. Set the volume control on the monitor amplifier to 1/2. Once a source
is connected to the console, test the monitor amp. The audio through the monitor speakers should be clear and without significant
noise or hum.
WARNING- do NOT have all levels controls at maximum. Too much audio level through your speakers can damage the speakers.
HUM OR NOISE IN THE MONITOR SPEAKERS

It is possible to get hum with only the monitor amp itself connected to
the console. This is not a problem with the console. It is caused by a
ground loop between the monitor amp and the console power.
A ground loop is created whenever there are two or more ground Connect an
audio power
paths between two pieces of equipment. This creates a large loop amp and
antenna which detects 60 cycle AC as a hum. Be certain to place both speakers
pieces of equipment on the same AC power strip. If hum persists, then to the MON
it is in the audio wiring. Shield grounds connected at both ends of the output of
cable often are the second ground path. The shield should be grounded the console
at one end only. To find a ground loop, unplug audio cables one at a
time until the hum goes away. Once the offending cable is isolated,
examine the wiring to find how the loop is being created. Break the
loop. Audio power amp
Miscellaneous IO Monitor Output Earphone Output External Monitor In

1 Mute Relay 1 Left (+) out 1 Left (+) out 1 Left (+) in
2 Mute Relay 2 Left (-) out 2 Left (-) out 2 Left (-) in
3 Cue Input (-10dBu) 3 Right (+) out 3 Right (+) out 3 Right (+) in
4 nc 4 Ground 4 Ground 4 Ground
5 Talkback (12V) 5 nc 5 nc 5 nc
6 Talkback (logic) 6 Right (-) out 6 Right (-) out 6 Right (-) in
7 (+) Talkback in 7 nc 7 Cue out to amp 7 Left -10dBu input
8 (-) Talkback in 8 nc 8 nc 8 Right -10dBu input
TOP REAR VIEW OF THE OUTPUT MODULE

Main Console Outputs Monitor Inputs and Outputs
Output Module (MARC-OB)
4.9
Headphone Wiring
The console has a built in headphone amplifier that will drive hi impedance headphones and 8 ohm headphones. The head-
phone jack for the amplifier is located at the bottom right of the output module (front right corner of the console). The console also
has a balanced line level output for use with an external headphone amplifier. The balanced output is located on the output module on
an RJ45 connector.
WARNING- do NOT have all levels controls at maximum. Too much audio level through your system can damage the headphones.
HUM OR NOISE IN THE HEADPHONES
It is possible to get hum with only the headphone amp itself connected
to the console. This is not a problem with the console. It is caused by a
ground loop between the headphone amp and the console power.
A ground loop is created whenever there are two or more ground

paths between two pieces of equipment. This creates a large loop
antenna which detects 60 cycle AC as a hum. Be certain to place both
pieces of equipment on the same AC power strip. If hum persists, then
it is in the audio wiring. Shield grounds connected at both ends of the
cable often are the second ground path. The shield should be grounded
at one end only. To find a ground loop, unplug audio cables one at a time Audio power amp
until the hum goes away. Once the offending cable is isolated, examine
the wiring to find how the loop is being created. Break the loop.


4.10
External Monitor Input Wiring

The console has an external audio input for the monitor system. It is usually connected to an off air signal for the radio sta-
tion from a radio tuner or modulation monitor. The external input has input for both stereo balanced (+4dBU) and stereo unbalanced
(-10dBu) inputs. The balanced input has level trim pots. The unbalanced input is fixed for -10dBu consumer levels.

5
6
White w/Blue Stripe
RJ45
Tuner or Off Air

Monitor Output


4.11
On Air Light Wiring

The console features a sustained reed relay closure for activating an on air light. The reed relay has a maximum current of 50 milliamps and
should be used to drive an external relay or other AC devices to drive the on air light.

5
6
White w/Blue Stripe
RJ45
ON AIR (MUTE) RELAY


4.12
Talkback (intercom) Wiring

The console has two audio inputs for use in talkback:
(1) The console has a balanced, line level audio input that feeds the control room monitor speakers (unless muted by a mic) and in the earphones
(whether muted or unmuted).
(2) The console has a second -10dBu unbalanced line level input into the cue system for talkback. The audio on this input will act the same as cue
audio (mute into the cue speakers when a mic is turned on, but autocue into the headphones if the talback logic is activated).
The logic input must be a dry closure between pins 5 (+12V) and pin 6 (logic). This will trigger auto cue so that audio fed into talkback input 2
(cue) will be heard in the headphones.

5
6
White w/Blue Stripe
RJ45
TALKBACK


4.13
Program Output Wiring

These outputs are active, balanced with < 100 ohms output impedance. They are factory calibrated for +4dBu balanced levels.

5
6
White w/Blue Stripe
RJ45
Main Console Outputs
Program Output Audition Output Utility Output

1 Left (+) out 1 Left (+) out 1 Left (+) out
2 Left (-) out 2 Left (-) out 2 Left (-) out
3 Right (+) out 3 Right (+) out 3 Right (+) out
4 Ground 4 Ground 4 Ground
5 nc 5 nc 5 nc
6 Right (-) out 6 Right (-) out 6 Right (-) out
7 Mono out (+) 7 Mono out (+) 7 Mono out (+)
8 Mono out (-) 8 Mono out (-) 8 Mono out (-)

4.14
Mono mic level Input Module Wiring Connectors

Logic ‘B’ ‘A’
Channel Control Logic (Turrets)
The pins on the ‘Logic’ connector are used to remote control the mod- ‘B’
ule for applications such as studio talk turrets. Controls include Chan- Input
nel On, Off, Tally LED driver for on-off status, Talk to Console, and
momentary Cough logic. All control is by dry closure to ground. The
tally LED should be connected through a 510 ohm resistor to ground. ‘A’
Input
A/B
Pgm
Channel On
Aud
Channel Off
Utl
On-off Tally LED

Cue
Talk to Console
Cough
Ground

5
6
White w/Blue Stripe
RJ45
8 Brown w/White Stripe Mic
1) Mono Mic Input module (MARC-MIC)

MIC & STEREO LINE MODULES
Logic ‘B’ Mono Mic Input ‘A’ Mono Mic Input
The pins on the ‘Logic’ connector
1 Talk 1 (+) in 1 (+) in are used to remote control the
2 Tally 2 (-) in 2 (-) in module for applications such as
3 Channel Off 3 nc 3 nc studio talk turrets. Controls include
4 Ground 4 Ground 4 Ground Channel On, Off, Tally LED driver
5 Channel On 5 nc 5 Stop Logic for on-off status, Talk to Console,
6 Cough 6 nc 6 nc and momentary Cough logic. All
7 nc 7 nc 7 Logic common control is by dry closure to ground.
8 nc 8 nc 8 Start Logic The tally LED should be connected
through a 510 ohm resistor to
ground.
Channel On
Channel Off
On-off Tally LED
Talk to Console
Cough
Ground
4.15
Stereo Line Level Input Module Wiring

Connectors
Logic ‘B’ ‘A’
The pins on the ‘Logic’ connector are used to remote control the mod-
ule for applications such as studio talk turrets. Controls include Chan-
nel On, Off, Tally LED driver for on-off status, Talk to Console, and ‘B’
momentary Cough logic. All control is by dry closure to ground. The input
tally LED should be connected through a 510 ohm resistor to ground.
Channel On ‘A’
Channel Off input
A/B
On-off Tally LED
Pgm
Talk to Console
Aud
Cough
Utl
Ground
Cue
Source Control Logic

The logic controls (1) Stop Logic, (2) Start Logic, and (3) Logic com-
mon are momentary closures from a dry contact reed relay (max cur-
rent = 50 milliamps). They are available for start and stopping source
devices like CD players
Start logic
Common
Stop Logic

Line
5
6
White w/Blue Stripe
RJ45
2) Stereo Line Input module (MARC-STL)
Logic ‘B’ Stereo Line Input ‘A’ Stereo Line Input

1 Talk 1 Left (+) in 1 Left (+) in
2 Tally 2 Left (-) in 2 Left (-) in
3 Channel Off 3 Right (+) in 3 Right (+) in
5 Channel On 5 nc 5 Stop Logic
6 Cough 6 Right (-) in 6 Right (-) in
7 nc 7 nc 7 Logic common
8 nc 8 nc 8 Start Logic
4.16
The PC-USB input Module Wiring Connectors

Logic Rec USB
The RJ45 connector titled ‘RS232 Logic’ wires to a 9 pin RS232 D-sub con-
nector as illustrated below
9 Pin RS232
1 nc Rec
2 Pin 1 RJ45 ord
3 nc Pgm
4 nc Aud
5 nc
Utl
6 Pin 2 RJ45
7 nc Cue
8 nc
9 Pin 3 RJ45

2 Orange w/White Stripe Left (-) PC USB
5
6
White w/Blue Stripe
RJ45
4) PC USB module (MARC-USB)
RS232 Logic Record Input USB Connector

1 Record Logic 1 Left (+) in
2 Ch On-off logic 2 Left (-) in
3 Ground 3 Right (+) in
4 Ground 4 Ground
5 nc 5 nc
6 nc 6 Right (-) in
7 nc 7 nc
8 nc 8 nc
4.17
The Telephone Input Module Wiring

Connectors
Logic Out In
a) CONSOLE PHONE INPUT- A telephone hybrid has an audio input and an audio output. The hybrid audio
output is the callers voice and is connected to the input on the phone module.
Output
b) CONSOLE MIX MINUS OUTPUT- The input to the hybrid is from the console PHONE OUT connector on the trim
back of the module. A mix minus bus is a special audio mixing bus that contains all audio on the console bus
MINUS the callers voice. In this way the caller hears everything except himself. If he was not “minused” Input
from the mix, then the caller would feed back to himself. trim
Off
line
c) CONTROL LOGIC- The hybrid has two ways to “answer” the caller and pick up the telephone line: front Pgm
panel manual control of the hybrid itself and remote control. For manual control, an On and Off button will be
located on the front panel of the hybrid. For remote control, the PHONE LOGIC module connector (RJ45) Aud
must have a custom cable connecting it to the console source start/stop logic. The logic is dry reed relay Utl
closures for both Start and Stop as shown below. Cue
d) CALIBRATION- The console PHONE IN and PHONE OUT connectors are set for +4dBu levels. These connec-
tors have trim pots on the top of the module
IMPORTANT
Two phone modules can be
placed in a single mainframe.
They are...
1) MARC-PHN1
1,2,3,4,5,6,7,8
2) MARC-PHN2
PIN Wire Color Audio
2 Orange w/White Stripe Left (-) Two PHN1s or two PHN2 mod-
ules should not be used in the Phone
5 White w/Blue Stripe

RJ45 same mainframe
6 Green w/White Stripe Right (-)
3) Phone Input module (MARC-PHN)

PHONE MODULE NOTE:
The logic controls (1) Stop Logic,
Logic Phone module out Phone module In (2) Start Logic, and (3) Logic com-
mon are momentary closures from
1 Talk 1 (+) out 1 (+) in a dry contact reed relay (max cur-
2 Tally 2 (-) out 2 (-) in rent = 50 milliamps). They are avail-
3 Channel Off 3 nc 3 nc able on the ‘Phone module in’ and
4 Ground 4 Ground 4 Ground ‘Logic’ connectors for connection to
5 Stop Logic 5 nc 5 Stop Logic the hybrid.
6 Channel On 6 nc 6 nc
7 Logic common 7 nc 7 Logic common Start logic
8 Start Logic 8 nc 8 Start Logic Common
Stop Logic
4.18
The Studio Monitor Module Wiring

Connectors
Hdp Mon Ext
MUTE LOGIC
The ‘Mute Logic’ is a dry contact sustained reed relay closure with a max
current of 50 milliamps. The closure should be used to drive an external
lamp driver (not drive a lamp directly).
Ext1
Pgm
Aud
Utl
Talk to
Studio

5
6
White w/Blue Stripe
RJ45 Studio

5) Studio Monitor Board (MARC-STM)
Earphone Output Monitor Output External Monitor In

1 Left (+) out 1 Left (+) out 1 Left (+) in
2 Left (-) out 2 Left (-) out 2 Left (-) in
3 Right (+) out 3 Right (+) out 3 Right (+) in
5 nc 5 nc 5 nc
6 Right (-) out 6 Right (-) out 6 Right (-) in
7 Mute Logic 7 nc 7 nc
4.19
PC Setup
The MARC-15 PC-USB input modules have a built in sound card. This enables the console to play audio directly from a Windows
PC using Arrakis DHD-Live software. The console can play audio from the PC, record audio to the PC, and control the start and
stop of play on the PC.
RECOMMENDED OPERATING SYSTEM

The minimum PC operating system is Windows XP or VISTA. Windows XP is currently the recommended operating system
CONNECTIONS
The PC is connected to the console by:
1) USB cable (USB 1 or USB 2)
2) RS232 serial port cable (or RS232 to USB converter, contact the factory for recommended products)
3) Audio cable
LAPTOP OR DEKTOP PC
INSTALLING & OPERATING THE SOFTWARE

refer to the that section in this manual
PC LINE OUT
9 PIN
RS232 AUDIO CABLE WITH
SERIAL
CONTROL 1/8" PHONE JACKS
CABLE USB
PORT
cable
CUE
PC USB module (MARC-USB)
IN
USB NOTE: 9 Pin RS232
The RJ45 connec- 1 nc
RS232 Logic Record Input USB Connector tor titled ‘RS232 2 Pin 1 RJ45
Logic’ wires to a 9 3 nc
pin RS232 D-sub 4 nc
connector as illus- 5 nc
trated at the right 6 Pin 2 RJ45
4 Ground 4 Ground
7 nc
5 nc 5 nc
8 nc
6 nc 6 Right (-) in
9 Pin 3 RJ45
7 nc 7 nc
8 nc 8 nc
EIA/TIA 568B WIRING STANDARD COLORS IF YOUR PC DOES NOT HAVE AN RS232 PORT such as: IOGEAR GUC232A
RS232 to USB adapter
4 Blue w/White Stripe Ground ARC RS232 PORT
USB
5
6
White w/Blue Stripe
RJ45 HUB PC USB PORT
7 White w/Brown Stripe ARC CH 9 USB PORT
4.20
ARC-16SW 16 in X 3 out Remote Selector for the MARC-15

Adding more Inputs to the MARC-15 Console
For applications requiring more than the 30 inputs supported by the MARC-15, the ARC-16SW provides up to 16 more stereo inputs that can be selectable
to any 3 console channels. The switcher features balanced inputs that are all trim pot adjustable from consumer levels (-10dBu) to professional levels
(+4dBu).
The ARC-16SW
The ARC-16SW is a custom configuration of the Arrakis BROADCAST DOCKING STATION. The BROADCAST AUDIO DOCKING STATION is a multipurpose product
with applications that vary depending on the firmware loaded into the hardware and the PC software used to control it. In the ARC-16SW application the
firmware in the hardware is internally configured to support only the 16 x 3 router functions.
PC Control
The ARC-16SW is controlled via RS232 serial cable from a PC computer. While the console does not have direct control of the switcher from its front panel,
the PC software adds ease of use and flexibility with on screen labeling, support of touch screen monitors, and much more.
Network control from ANY Studio

Client/Server software comes standard with the ARC-16SW so you can view and control the switcher from ANY Windows PC computer on the network in
your station.
PC Configuration
The ARC-16SW supports both Windows XP and Windows VISTA for control. The computer must have an RS232 serial cable or a USB to serial converter.
Contact the factory for suggested converters.
16 Stereo Sources
Control the Switcher

by Windows PC
software LGC IN3 SAT LGC3 CUE CH 16 CH 13 CH 10 CH 7 CH 4 CH 1
SAT LGC1 SUM IN CH 14 CH 11 CH 8 CH 5 CH 2

REC LGC LGC IN1
SAT LGC2 PGM CH 15 CH 12 CH 9 CH 6 CH 3

LGC OUT LGC IN2
PGM CH 4 CH 4 CH 1 CH 1
PGM CH 13 CH13 CH 10 CH10 CH 7 CH7
RGT EXT EXT RGT LFT RGT LFT
LFT RGT LFT RGT LFT RGT LFT
RGT LFT
CUE CH 5 CH 5 CH 2 CH 2
CUE CH 11 CH 11 CH 8 CH 8
LFT RGT CH 16 CH 16 CH 14 CH 14
RGT LFT RGT LFT RGT LFT
RGT LFT RGT LFT
RGT LFT
Broadcast DockingStation III CH 9 CH9 CH 6 CH 6 CH 3 CH 3

CH 15 CH15 CH 12 CH 12 LFT
Professional PC toBroadcast AudioInterface LFT RGT LFT RGT
RGT LFT RGT LFT RGT
PC 2 PC 2 PC 1 PC 1
REC REC RGT LFT RGT LFT
RGT LFT
PC DC
HEAD PC PC PWR
RS232 USB REC TWO ONE
PHN IN
COM OUT IN
3 stereo Outputs
IF YOUR PC DOES NOT HAVE AN RS232 PORT such as: IOGEAR GUC232A
RS232 to USB adapter
ARC RS232 PORT

USB
HUB PC USB PORT
ARC CH 9 USB PORT
4.21
ARC-16SW Software
Push button Array for Manual Control
FEATURES
Client/Server network control from ANY studio
Manual Pushbutton control of 16 inputs & 3 outputs
Customized Labeling of all Inputs & Outputs
Source lockout to prevent feedback
Touchscreen size buttons
One Week Source Automation play list
Copy & Paste Hour and Day schedules
Play log for reconciliation
Emergency Silence Sensor on Main Output
Programmable delay time One Week Automation Play List
Automatically switches to a Backup source channel w relay
4.22
ARC-16SW 16 in X 3 out Remote Selector for the MARC-15

SWITCHER WIRING
a) WHITE MOLEX CONNECTORS
As viewed looking down on the switcher . NOTE: the BROADCAST AUDIO DOCKING STATION is a multipurpose
Pin 7 is engraved on the connector housing. Pins are .090" product with applications that vary depending on the firmware loaded
into the hardware and the PC software used to control it. In the ARC-
_/\_/\_/\_ 16SW application the firmware in the hardware is internally configured
| 1 2 3 | to support only the 16 x 3 router functions. Therefore the logic and
| 4 5 6 | other connectors that support other functions should be ignored.
| 7 8 9 |
------------
b) DESCRIPTION
The switcher has active balanced audio inputs & outputs to the switcher. The pin out is shown below. Each of the 16 inputs, the Pro-
gram output, and Cue output has a trim pot level adjust. The balanced Record output is a fixed level, however the Record output also
has an unbalanced 1/8" headphone jack output with trim pot. Gain is increased by turning the trimpot counterclockwise. Levels are
set from the factory for +4dBm input and output. Only a qualified technician with appropriate test equipment should adjust the lev-
els.
c) IMPORTANT
none of the audio outputs should be grounded. Grounding an audio output will result in the destruction of the audio output driver IC.
d) ‘CHANNEL 1' to ‘CHANNEL 16' Input Connectors

1) Audio ground
2) Right + input Cue & Record Program Inputs
3) Right - input Output Output 1-16
4) na
5) Left + input
6) Left - input
7) na
8) na
9) na
CUE CH 16 CH 13 CH 10 CH 7 CH 4 CH 1
LGC IN3 SAT LGC3
e) ‘PROGRAM’ Connector (Program Output)

1) Audio ground REC LGC LGC IN1 SAT LGC1 SUM IN CH 14 CH 11 CH 8 CH 5 CH 2
2) Right - input
3) Right + input
4) Start relay to pin 9 (momentary) LGC OUT LGC IN2 SAT LGC2 PGM CH 15 CH 12 CH 9 CH 6 CH 3
5) Left - input
6) Left + input PGM
LFT
PGM
RGT EXT
RGT
EXT
LFT
CH 13
RGT
CH13
LFT
CH 10
RGT
CH10
LFT
CH 7
RGT
CH7
LFT
CH 4
RGT
CH 4
LFT
CH 1
RGT
CH 1
LFT
7) na
8) na CUE
LFT
CUE
RGT CH 16
RGT
CH 16 CH 14
LFT RGT
CH 14
LFT
CH 11
RGT
CH 11
LFT
CH 8
RGT
CH 8
LFT
CH 5
RGT
CH 5
LFT
CH 2
RGT
CH 2
LFT
9) na
Broadcast DockingStation III
f) ‘CUE’ Connector (Cue & Record outputs)
CH 6 CH 6 CH 3 CH 3
CH 15 CH15 CH 12 CH 12 CH 9 CH9
LFT
Professional PC toBroadcast AudioInterface LFT RGT LFT RGT
RGT LFT RGT LFT RGT
1) Audio ground REC REC

PC 2
RGT
PC 2
LFT
PC 1 PC 1
RGT LFT
2) Cue Right - output RGT LFT
PC DC
HEAD PC PC PWR
RS232 USB TWO ONE
3) Cue Right + output PHN REC
COM OUT IN IN
4) Record R - output
5) Cue Left - output
6) Cue Left + output
Unbalanced Record output
7) Record Right + output
(1/8" headphone jack)
8) Record Left - output
BROADCAST AUDIO DOCKING STATION
9) Record Left + output
4.23
Basic Calibration
WARNING
The console has been calibrated at the factory to normal +4dBu levels and should not require field calibration. Usually, it is better
to adjust the level out of the source device than to adjust the console trim levels. That is so that the source can be plugged into
any module without requiring recalibration of the module. Field calibration should only be done with proper test equipment and by a
qualified audio technician.
a) INPUT SOURCE MODULE LEVEL ADJUST

Trimpots for all input module levels are located under the meter panel. These are provided for convenience in adjusting levels to
match an unusual source device. In general, it is highly recommended to adjust the level out of the source device to match +4dBu
rather than adjusting the trim level for the module. That is so that the source can be plugged into any module without requiring
recalibration of the module.
1) MIC MODULE: a trimpot is located under the meter panel for both the ‘A’ and ‘B’ mic inputs. These trim pots are set at the fac-
tory for typical microphone gain levels. These trim pots can be adjusted if different mic gains are required. To adjust, the simplest
method is to speak into the mic and adjust the trim pot with a small straight edge screwdriver until the desired gain is reached.
2) STEREO LINE MODULE: left and right trimpots are located under the meter panel for both the ‘A’ and ‘B’ inputs. The trimpots
adjust level from -16dBu to +22dBu. They are set at the factory for +4dBu balanced. It is highly recommended to adjust the level
out of the source device to match +4dBu rather than adjusting the trim level for the module. That is so that the source can be
plugged into any module without requiring recalibration of the module.
3) PC-USB MODULE: there are no trimpots on the PC-USB module. This is because the audio levels are determined by the PC soft-
ware. The analog record input is calibrated for +4dBu so that it can be fed by any of the three main buses: Pgm, Aud, or Utl.
4) PHONE MODULE: input and output level trimpots are located under the meter panel. The trimpots adjust level from -16dBu to
+22dBu. They are set at the factory for +4dBu balanced. It is highly recommended to adjust the level out of the source device to
match +4dBu rather than adjusting the trim level for the module. That is so that the source can be plugged into any phone module
without requiring recalibration of the module.
b) OUTPUT MODULE LEVEL ADJUST

Output module level adjustments are NOT provided on the front of the output module, under the meter panel. This is because these
levels are critical to maintain headroom in the console and are factory set for maximum console performance. The output levels
are set at the standard +4dBu balanced. If the station uses a different level such as +0dBu, it is recommended to contact the fac-
tory where the +0dBu level will be calibrated at the factory before it ships.
1) PGM, AUD, UTL BUS LEVELS: The level trimpots are on the back of the output module so that field calibration can be accom-
plished by a qualified technician with appropriate test equipment. The default factory level is +4dBu.
2) MONITOR, HEADPHONE OUTPUTS: The level trimpots are on the back of the output module so that field calibration can be
accomplished by a qualified technician with appropriate test equipment. The default factory level is +4dBu.
3) EXT1 INPUT TO MONITOR SELECTOR SWITCH: The level trimpots are on the back of the output module so that field calibration
can be accomplished by a qualified technician with appropriate test equipment. The default factory level is +4dBu.
c) VU METER ADJUSTMENT
The VU meters are factory set for +4dBu at 0VU. These levels should not be changed from factory settings unless directed by fac-
tory service technicians. The trimpots are located on VU meter driver boards in the VU meter panel.
4.24
Output Bd Calibration HP R HP L MON R MON L

Remove the jumper to defeat audio
into the meter panel cue speaker
Output module level adjustments are
NOT provided on the front of the output Talkback input
module, under the meter panel. This is EXT In R
because these levels are critical to
Utl mono
maintain headroom in the console and EXT In L
are factory set for maximum console
performance. The output levels are set
at the standard +4dBu balanced. If the Utl Right
station uses a different level such as
+0dBu, it is recommended to contact
the factory where the +0dBu level will Utl Left
be calibrated at the factory before it
ships.
Aud mono
Aud Right
Aud Left
Pgm mono
Pgm Right
Pgm Left
4.25
Input board Jumper Setup

Source Input modules have pin jumpers on the PC board
for rarely used module setup. The factory default is Mic Module (only)
correct 90% of the time. The factory will set these Phantom Power
jumpers to meet custom configurations if requested ‘A’ input
when the order is placed.
‘B’ input
a) Mic Module Phantom Power (Mic module only)
Add a jumper if the mic being used is a condenser mic
that requires 48VDC phantom power.
The factory default is for NO jumpers to be in place.
b) Muting Assignments (Mic & Line modules only)

If the module is a mic module or the module is a line
module being fed by a mic preamp, then a muting jump-
er must be placed on the module. This is to eliminate
feedback from the monitor speakers to the mic. If the
Mic & Line (only)
mic is in the control room with the console, then the
Muting
Control Room muting jumper must be in place. If the mic
Control room
is in the studio, then the Studio jumper must be in place.
A jumper should not be placed on both the Control Room
Studio
and Studio pins.
The factory default is for all mic modules to be shipped Mic & Line (only)
with the Control room muting jumper in place. CR Mic assign
c) Control Room Mic Assigment (Mic & Line only)

This jumper assigns the module as the control room mic
that will feed the phone talk and studio monitor talk sys-
tems. Only ONE module per mainframe should have this
jumper. All modules
Timer Reset
The factory default is for the first mic in the mainframe
to have this jumper in place.
d) Timer Reset Assignment (All input modules)

If the timer is in AUTO mode, his jumper causes the
timer to reset to zero when this module is turned on.
The factory default is for all non-mic channels to have

this jumper in place.
4.26
INPUT OUTPUT WIRING SUMMARY
1) Mono Mic Input module (MARC-MIC)

MIC & STEREO LINE MODULES
Logic ‘B’ Mono Mic Input ‘A’ Mono Mic Input
The pins on the ‘Logic’ connector
1 Talk 1 (+) in 1 (+) in are used to remote control the
2 Tally 2 (-) in 2 (-) in module for applications such as
3 Channel Off 3 nc 3 nc studio talk turrets. Controls include
4 Ground 4 Ground 4 Ground Channel On, Off, Tally LED driver
5 Channel On 5 nc 5 Stop Logic for on-off status, Talk to Console,
6 Cough 6 nc 6 nc and momentary Cough logic. All
7 nc 7 nc 7 Logic common control is by dry closure to ground.
8 nc 8 nc 8 Start Logic The tally LED should be connected
through a 510 ohm resistor to
ground.
Channel On
Channel Off
2) Stereo Line Input module (MARC-STL) On-off Tally LED
Talk to Console
Cough
Logic ‘B’ Stereo Line Input ‘A’ Stereo Line Input
Ground
1 Talk 1 Left (+) in 1 Left (+) in
2 Tally 2 Left (-) in 2 Left (-) in
3 Channel Off 3 Right (+) in 3 Right (+) in Source Control Logic
4 Ground 4 Ground 4 Ground The logic controls (1) Stop Logic, (2)
5 Channel On 5 nc 5 Stop Logic Start Logic, and (3) Logic common are
6 Cough 6 Right (-) in 6 Right (-) in momentary closures from a dry con-
7 nc 7 nc 7 Logic common tact reed relay (max current = 50
8 nc 8 nc 8 Start Logic milliamps). They are available for start
and stopping source devices like CD
players
Start logic
Common
Stop Logic
3) Phone Input module (MARC-PHN)
PHONE MODULE NOTE:
The logic controls (1) Stop Logic,
Logic Phone module out Phone module In (2) Start Logic, and (3) Logic com-
mon are momentary closures from
1 Talk 1 (+) out 1 (+) in a dry contact reed relay (max cur-
2 Tally 2 (-) out 2 (-) in rent = 50 milliamps). They are
3 Channel Off 3 nc 3 nc avaliable on the ‘Phone module in’
4 Ground 4 Ground 4 Ground and ‘Logic’ connectors for connec-
5 Stop Logic 5 nc 5 Stop Logic tion to the hybrid.
6 Channel On 6 nc 6 nc
7 Logic common 7 nc 7 Logic common Start logic
8 Start Logic 8 nc 8 Start Logic Common
Stop Logic
4) PC USB module (MARC-USB)

USB NOTE: 9 Pin RS232
The RJ45 connec- 1 nc
RS232 Logic Record Input USB Connector tor titled ‘RS232 2 Pin 1 RJ45
Logic’ wires to a 9 3 nc
pin RS232 D-sub 4 nc
connector as illus- 5 nc
trated at the right 6 Pin 2 RJ45
4 Ground 4 Ground
7 nc
5 nc 5 nc
8 nc
6 nc 6 Right (-) in
9 Pin 3 RJ45
7 nc 7 nc
8 nc 8 nc
4.27
INPUT OUTPUT WIRING SUMMARY (continued)
5) Studio Monitor Board (MARC-STM)
NOTE
Earphone Output Monitor Output External Monitor In The ‘Mute Logic’ is a dry contact
sustained reed relay closure with
1 Left (+) out 1 Left (+) out 1 Left (+) in a max current of 50 milliamps.
2 Left (-) out 2 Left (-) out 2 Left (-) in The closure should be used to
3 Right (+) out 3 Right (+) out 3 Right (+) in drive an external lamp driver (not
4 Ground 4 Ground 4 Ground drive a lamp directly).
5 nc 5 nc 5 nc
6 Right (-) out 6 Right (-) out 6 Right (-) in
6) Output Board (MARC-OB)

to Meter Panel
A) Main Console Outputs
Program Output Audition Output Utility Output

1 Left (+) out 1 Left (+) out 1 Left (+) out NOTE
2 Left (-) out 2 Left (-) out 2 Left (-) out The ‘Mute Logic’ is a dry contact
3 Right (+) out 3 Right (+) out 3 Right (+) out sustained reed relay closure with
4 Ground 4 Ground 4 Ground a max current of 50 milliamps.
5 nc 5 nc 5 nc The closure should be used to
6 Right (-) out 6 Right (-) out 6 Right (-) out drive an external lamp driver (not
7 Mono out (+) 7 Mono out (+) 7 Mono out (+) drive a lamp directly).
8 Mono out (-) 8 Mono out (-) 8 Mono out (-)
B) Monitor Inputs & Outputs
NOTE: to acti- 1 Mute Relay 1 Left (+) out 1 Left (+) out 1 Left (+) in
vate Autocue 2 Mute Relay 2 Left (-) out 2 Left (-) out 2 Left (-) in
for talkback, 3 Cue input 3 Right (+) out 3 Right (+) out 3 Right (+) in
connect pin 5 4 nc 4 Ground 4 Ground 4 Ground
(12V) to pin 6 5 Talkback (12V) 5 nc 5 nc 5 nc
(logic) with a 6 Talkback (Logic) 6 Right (-) out 6 Right (-) out 6 Right (-) in
dry contact clo- 7 (+) Talkback in 7 nc 7 Cue Out (to amp) 7 Left -10dBu input
sure. 8 (-) Talkback in 8 nc 8 nc 8 Right -10dBu input
4.28
13.0 Analog Audio Wiring

The following sections assume twisted pair, shielded audio cable for all analog wiring. The
illustrations demonstrate how to wire balanced and unbalanced analog devices in various
configurations.
13.1 Balanced Source Output to Balanced Console Input

Balanced inputs and outputs are the best method to reject hum
ACTIVE BALANCED CONSOLE

AUDIO SOURCE INPUT
(+) (+)
(-) (-)
SHIELD
CHASSIS
GROUND
13.2 Unbalanced Source Output to Balanced Console Input

Use this wiring method for low noise connection of an unbalanced audio source to a balanced
input on a console.
ACTIVE UNBALANCED CONSOLE

AUDIO SOURCE INPUT
Signal (+)
Electronic
(-)
Ground
SHIELD
CHASSIS
GROUND
4.29
13.3 Transformer Balanced Output to Balanced Console Input

Transformer sources require a fixed impedance for proper performance. The console input impedance
is high compared to the impedance of most transformers and will require a resistor to match the trans-
former.
600 ohm
TRANSFORMER BALANCED matching resistor CONSOLE
AUDIO SOURCE INPUT
(+) (+) Zin > 10k

ohms
(-) (-)
SHIELD
CHASSIS
GROUND
13.4 Microphone to Balanced Console Input

The input impedance of microphone preamps is high compared to the characteristic imped-
ance of many microphones. Most microphones do not require impedance matching. Refer to
the microphone spec sheet to determine if impedance matching is recommended. If required,
the resistor should be added as illustrated below.
Stereo microphones will require an outboard stereo mic preamp and then be brought in
to the console on a stereo line input channel.
IMPORTANT- High voltage static discharges to the mic case can ruin a mic preamp’s input
stage. Room carpets and surfaces should be chosen for low static or treated to reduce static.
MICROPHONE 150 ohm typical CONSOLE

matching resistor INPUT
(+) (+)
Zin > 1k
ohm
(-) (-)
SHIELD SHIELD GND
CASE
GROUND
4.30
13.5 Use of an Isolation Transformer to convert an Unbalanced

Source into a Balanced Source
In some situations, an isolation transformer is required for RF or ground loop isolation where
the source output is unbalanced. The isolation transformer must be impedance matched to
BOTH the source and the console.
To perform the matching, you must refer to the data sheet for the source device and find the
output impedance. That will be Rseries as shown in the diagram. Select an audio isolation
transformer with a specified impedance. The transformer impedance will be (Ztransformer)
Rseries = Ztransformer - Rsource
Rconsole = Ztransformer
ACTIVE ISOLATION CONSOLE

UNBALANCED TRANSFORMER INPUT
AUDIO SOURCE
Source Output Isolation Transformer Console input

Source Output impedance Matching Resistor Impedance matching resistor
(Rsource) (Rseries) (Ztransformer) (Rconsole)
Signal (+) (+) Zin > 10k

Electronic ohms
(-) (-)
Ground
SHIELD
CHASSIS
GROUND
4.31
13.6 Console Balanced Output to Balanced Input

Balanced inputs and outputs are the best method to reject hum
CONSOLE ACTIVE BALANCED

OUTPUT AUDIO INPUT
(+) (+)
Zin > 10k
ohms
(-) (-)
SHIELD
CHASSIS
GROUND
13.7 Console Balanced Output to Unbalanced Input

Use this wiring method for low noise connection of an unbalanced audio source to a bal-
anced output on a console.
CONSOLE ACTIVE UNBALANCED

OUTPUT AUDIO SOURCE
(+) Signal
(-) Electronic
Ground
Electronic SHIELD
Ground
IMPORTANT- Notice that the (-) output

CHASSIS
GROUND
of the console is not connected to any-
thing. The most common reason for out-
put IC failure and for crosstalk is ground-
ing unused balanced output drivers.
4.32
13.8 Console Balanced Output to Transformer Input

Transformer sources require a fixed impedance for proper performance. The console output impedance is low
compared to the impedance of most transformers and will require a resistor to match the transformer.
Rseries = (Ztransformer / 2) - Rconsole

BALANCED
CONSOLE OUTPUT AUDIO
Console Output INPUT
Console Output impedance Matching Resistor input Transformer
(Rconsole) (Rseries) Impedance
(Ztransformer)
(+) (+) (+)

(-) (-) (-)
SHIELD
CHASSIS
GROUND
13.9 Console Balanced Output to Isolation Transformer Unbalanced Input

Transformer sources require a fixed impedance for proper performance. Matching resistors are required as illus-
trated below.
Rseries = (Ztransformer / 2) - Rconsole
Rsource = Ztransformer
BALANCED ISOLATION ACTIVE

CONSOLE TRANSFORMER UNBALANCED
OUTPUT AUDIO INPUT
Console Output Isolation Transformer Source input

Console Output impedance Matching Resistor Impedance matching resistor
(Rconsole) (Rseries) (Ztransformer) (Rsource)
(+) (+) Signal In
(-) (-) (-) Electronic

Ground
SHIELD
CHASSIS Zin > 10k

GROUND ohms
4.33
Ground Loops
a) A GROUND LOOP CAUSES 60 CYCLE HUM
A ground loop exists when there is more than one ground path between two pieces of elec-
tronic equipment. The two ground paths form a large loop antenna which picks up noise cur-
rents, particularly 60 cycle AC. The resistance in the ground paths converts these currents into
fluctuating noise voltage differentials between the two pieces of equipment. If there is an audio
signal connection between these two pieces of equipment then this noise is added to the sig-
nal voltage.
AUDIO AUDIO
GROUND PATH #1 THROUGH SHIELD PRODUCT 2
PRODUCT 1
The most common

Ground Loop is caused
SHIELD
by shield grounds con-
nected at both ends and
the 3rd wire AC safety
ground GROUND PATH #2 THROUGH AC GROUND
MAIN AC
POWER
BOX
CHASSIS EARTH SIGNA;L

GROUND GROUND GROUND
EARTH
GROUND
b) REMOVE THE GROUND LOOP BY BREAKING THE LOOP (Full Ground Lift)
To stop the 60 cycle hum, one of the ground paths must be removed. The typical method
to remove the second ground path is to have the shield grounded on one end only.
c) PARTIAL GROUND LIFT

Sometimes it is possible to insert a 50-100 ohm resistor between the shield and ground.
This will allow the ground to remain connected for audio signal flow but increase the imped-
ance to break the ground loop. This may reduce the problem but will not fix it.
d) EQUIPMENT WITH A GROUND LIFT SWITCH

In some equipment, the ground is part of the connector assembly and a switch is provided
to disconnect the ground. If no switch is provided, then a standard cable may need to be
modified or a custom cable built with modifications to the shield ground.
4.34
Ground Loops (continued)

e) BREAKING A GROUND LOOP WITH AN AUDIO ISOLATION TRANSFORMER
In cases where the ground loop can not be broken due to a 3rd wire safety ground as the sec-
ond part of the ground loop, an audio isolation transformer can be inserted into the audio sig-
nal line. This can be required in unbalanced audio connections with signal and ground. The
use of transformers may not be desirable, but is sometimes the best solution.
f) BREAK A GROUND LOOP WITH A BALANCED INPUT

If a ground loop is being completed by the ground in an unbalanced device, it is possible to
break the loop by taking the ground of the audio output into the balanced input of another
device. If it is not possible to use a transformer to break a ground loop then a balanced distri-
bution amp is a possible solution.
UNBALANCED WRONG ACTIVE BALANCED

AUDIO OUTPUT AUDIO INPUT
Signal (+)
Ground (-)
SHIELD Ground
CHASSIS
GROUND
UNBALANCED CORRECT ACTIVE BALANCED

AUDIO OUTPUT AUDIO INPUT
Signal (+)
Ground (-)
SHIELD Ground
CHASSIS
GROUND
4.35
DHD-LIVE FOR
THE MARC CONSOLE
5.0
Getting Started
Included with an ARC series console (with a USB channel) is a free copy of DHD-Live. This software is the ultimate live assist tool for anyone
who wants to put on a dynamic and powerful live show. It includes features that give you unprecedented customization and flexibility. We are
confident that you will love this software.
This software is intended only for Live Assist. This means that it will not be capable of playing unattended such as with an Automation product
like Digilink-HD. If you are looking for a full featured automation system that can play unattended, please consider one of our automation
product, such as Digilink-HD, Digilink-Xtreme or New~Wave. Visit our website for more details.
Installation
To download the software, please go to this link here: http://arrakis-systems.com/download.html
This download will contain a full copy of the DHD-Live manual and an install EXE program. Follow the instructions on the website to install. All
files will be installed to the C:DHD folder. To uninstall, simply delete the C:DHD folder.
This software, along with the latest version of the Operations Manual can always be found on our website for download.
Updates
The DHD-Live software and training material will be updated on a regular basis, without notice. Please visit our website to get the latest
updates.
Support
The software is specifically designed to be easy to use for people with average PC computer and radio industry experience.
Support is limited to the product manual and the on screen help system in the software itself. Refer to the Arrakis website at
www.arrakis-systems.com for updated training materials. In a case where telephone support is a necessity, Arrakis has per minute
and per incident support available that can be paid for by valid credit card. For comprehensive support and advanced automation
features, please consider one of our automation product. Refer to the website or contact the factory for details.
Feedback
DHD-Live is an evolving software that will be updated on a regular basis. As such, we greatly appreciate any customer feedback. This may
include reporting issues with the software, or features that you would like to see added. Please visit our website to submit your requests.
To contact one of our support agents, please email:

dhdlivesupport@arrakis-systems.com
5.1
S ERVICE & M A IN TEN A N CE
SERVICE & MAINTENANCE

INSTRUCTIONS
6.0
General Repair Considerations

WARNING
The console should be repaired by qualified, professional, & experienced, audio technicians ONLY. Before beginning any type of repair or
opening the console CALL Arrakis customer support for recommendations.
DESIGNED FOR MODULAR PART REPLACEMENT

The MARC-15 console is designed for modular replacement rather than field repair. The power supply is external and plug in. Most ICs are
plug in. The rotary faders, and meters are plug in. A small amount of disassembly is required to reach most parts. Diagrams on the fol-
lowing pages explain the required disassembly.
COMPONENT LEVEL REPAIR SHOULD BE PERFORMED BY THE FACTORY

Detailed schematics are not provided with the MARC-15 console because component level repair should be performed at the factory. A
physical board layout is provided with descriptions of the functions of each IC. ICs can be individually replaced to test for functionality.
POWER SUPPLY
The power supply is a sealed module that must be replaced in whole if there is a problem.
REPEATED EQUIPMENT FAILURES

If a specific part of the console is failing regularly, it is likely that it is being subject to unusual stresses.
Examples are;
(1) Switch or fader failure- rough physical treatment
(2) Mic channel IC failure- static discharge to mic
(3) Input op amp failure- lightning, power surge, or other transient on this cable
(4) Output op amp failure- lightning, power surge, or other transient on this cable
(5) Power Supply failure- lightening, power surge, or other transient on the AC power line
SUGGESTED REPAIR PROCEDURES

(1) NO AUDIO OUT OF ONE INPUT MODULE- (Swap Cables) Be certain that the problem is in the console itself. If mic channel two doesn’t
function but mic channel one functions properly, then plug the cable from the good mic into the channel that you suspect to be bad. If the
channel that you suspect to be bad now functions, then the problem is external to the console and is in the source or the wiring. This is a
very fast and easy way to test your system.
(2) VU METERS MOVE BUT NO AUDIO OUT OF THE CONSOLE- The VU meters measure the actual output of the console itself. If the
meters move but no audio is present, the problem is after the console output and is in the following signal chain. Plug a set of headphones
into the output of the console and listen to the Program output to confirm this.
(3) LOUD LOW FREQUENCY HUM IN AUDIO- Many years ago this would mean a power supply failure. In today’s electronics, this is an
installation problem such as a ground loop. To confirm the problem is not in the console, remove ALL wiring from the console and connect
a pair of headphones to the output you are testing. The hum should be absent. All wiring must be removed and headphones only used. A
very common problem is for an audio power amp and speakers to create the ground loop with the console.
(4) NO AUDIO OUT OF THE MONITORS- Be certain that the monitor system is not muted due to a mic channel being on or talkback being
activated.
6.1
Opening the Console

WARNING
The console should be repaired by qualified, professional, & experienced, audio technicians ONLY. Before beginning any type of
repair or opening the console CALL Arrakis customer support for recommendations.
1) ACCESSING THE MOTHERBOARDS

The motherboards are accessed by removing the modules from the console.
2) ACCESSING THE INTERIOR OF THE VU METER PANEL

The VU meter panel is opened by removing the screw at the left and right front of the panel.
ACCESS SCREWS
6.2
Removing an Input Module

The input modules have a single bus ribbon cable that connects them to the motherboard. Care should be taken when removing or
reinstalling this cable.
How to Remove an Input Module from the Mainframe

1) Turn all power off to the console
2) Remove the two screws that attach the module to the mainframe
3) Unplug the RJ45 IO cables located at the rear of the module
4) Lift the module up from the mainframe and unplug the 30 wire ribbon cable at the motherboard.Leave the cable plugged in at the
module end.
5) The module is now free.
Motherboard
Main
Bus
Ribbon
Cable Input
(30 Module
wires)
6.2
Removing the Studio Monitor Module

The studio monitor module has two bus ribbon cables that connects it to the motherboard. Care should be taken when removing or
reinstalling these cables.
How to Remove a Studio Monitor Module from the Mainframe

1) Turn all power off to the console
2) Remove the two screws that attach the module to the mainframe
4) Lift the module up from the mainframe and unplug the 30 wire ribbon cable at the motherboard. Leave the cable plugged in at the
module end.
5) Unplug the 10 wire ribbon cable at the motherboard. Leave the cable plugged in at the module end.
6) The module is now free.
Motherboard
Main
Bus
Ribbon
Cable
(30
wires)
Studio
Studio Monitor
Monitor Ribbon Output
Module Cable Main Module
(10 Bus
wires) Ribbon
Cable
(30
wires)
6.2
Removing the Output Module

The output module has four cables that connect it to the motherboard and the VU
meter bridge. While none of the cables are interchangeable, care should be taken when Reset Ext1
removing or reinstalling these cables. Start Pgm
Stop Aud
Remove Auto Utl
How to Remove the Output Module from the Mainframe five Timer
1) Turn all power off to the console mounting

2) Remove the five screws that attach the module to the mainframe screws Cue

4) Lift the module at the rear and unplug the 26 wire ribbon cable to the VU meter
bridge.
Head
phone
5) Lift the module further and unplug the remaining 3 cables where they are plugged
into the motherboard. Leave the three cables plugged into at the module end. Monitor
6) The output module is now free. VU Meter Output Timer
Bridge Cable
Motherboard
Studio
VU Meter Bridge ribbon cable Monitor Cue &
Ribbon Earphone
Cable Power
(10 cable
wires) (+5V &
ground)
Output
Main Module
Bus
Ribbon
Cable
(30
wires)
6.2
Replacing Slide Faders

Slide faders are soldered into the individual module PC boards. Replacement of the slide faders can be done by
qualified technicians in the field or the module may be sent into Arrakis for replacement of the fader.
Replacing Rotary Faders

All 3 rotary faders are in a single wiring harness that plugs into
the motherboard. The entire harness should be replaced with all REMOVING THE KNOB
three pots. Contact the factory for a replacement harness.
To remove a rotary fader KNOB

(1) Remove the knob cover as illustrated COVER
(2) Remove the nut and nut plate.
(3) The pot will now remove from the rear of the
Pry cover from
front panel.
top of the Knob
(4) Unplug the pot from the motherboard. KNOB
to reveal a lock
nut. Unscrew the LOCK
lock nut to remove NUT
To put a new rotary fader in place:
the knob
Reverse the removal procedure
A/B A/B A/B A/B A/B A/B A/B A/B A/B A/B Rec Off Off Ext1 Auto Ext1
A/B
ord line line
Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Pgm Start Pgm
Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Aud Stop Aud
Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Utl Reset Utl
Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Cue Timer
Talk to
Studio
Cue
Head
phone
Monitor
Studio
Mic 1 Mic 2 PC USB Phone 1 Phone 2 Output Timer
Monitor
6.3
Replacing ICs
ICs must be replaced with care. Most ICs in the console are socketed so that they can be replaced.
When replacing an IC, be careful to not bend legs under the IC or outside the socket. Be extremely careful to not shock
an IC or the motherboard with a static discharge. In some cases, you must use a grounded arm or anklet if there is a
possibility of a static discharge.
In all cases, retain the old IC because it may not be damaged.
6.4
Mic module
Electronic Block Diagram RJ45 (8 wire)
Channel On, Off, Tally Logic Trim

Cough, Talkback
A/B ON PGM AUD UTL CUE F M
HEADPHONE JACK CONTROL ROOM
A U
Trim Logic Logic Logic PL-PR-AL-AR-UL-UR-Q-TB
stereo, drives 8 ohm D MONITOR OUTPUT
T
headphones E stereo, balanced
‘A’ in E
F R (-4dBu output)
PGM
Pwr Trim
A
Trim D AUD
E F
M
‘B’ in R Pwr A
UTL D
U Pwr INTERNAL CUE SPEAKER
T in VU meter bridge
E
Cue E
balanced, -50dBu nom. R
Remote start & stop, Trim

Stt/Stp
Channel On, Off, Tally F
Cough, Talkback A/B ON PGM AUD UTL CUE FET
A HEADPHONE OUTPUT
Cue Sum D stereo, balanced
SW
Trim Logic Logic Logic E
(-4dBu output)
Cue Logic -> R
Stereo ‘A’ in F PGM Trim
Trim
TALKBACK INPUT
Line A
D AUD Monitor stereo, balanced
Trim (+4 dBu output)
module E
R
Selector SW out
Air in
Trim
‘B’ in UTL AIR MONITOR INPUT
AIR
stereo, balanced
Cue
balanced, -20 to 10 dBu Pgm in (+4 dBu output)
L
PGM O
FET
PC USB module
G
I
SW Aud in PGM AUD UTL
AUD C
LOGIC D Stt/Stp
RS232 serial B Utl in
connection to PC 9 ON PGM AUD UTL CUE
(9 pin D-SUB) UTL
Logic Logic Logic Trim
C F PGM
PC PLAY / RECORD A
O
USB connection D Play D AUD
to WINDOWS PC E E PROGRAM OUTPUT
(USB connector) C R
UTL Stereo & Mono
Trim
(Balanced = +4 dBu)
Cue PGM Trim
Trim Sum
Record
Trim
Phone Stt/Stp AUD

Sum
module 1 On-off Off line ON PGM AUD UTL CUE
AUDITION OUTPUT
Logic Logic Logic Stereo & Mono
Trim
(Balanced = +4 dBu)
INPUT FROM Trim F PGM Trim
A UTL
PHONE HYBRID D Sum
balanced, AUD
E
-20 to 10 dBu R
UTL
Trim
Cue
OUTPUT TO Trim PGM

PHONE HYBRID UTILITY OUTPUT
balanced, AUD
Trim
Stereo & Mono
-20 to 10 dBu (Balanced = +4 dBu)
UTL Trim
Off
Line
LOGIC
Control Room Mute
Phone Logic Studio Mute
Dim for Talkback
module 2
6.5
Mic Module
The MARC-15 console is designed for modular replace- Start Relay

ment rather than component level field repair. The con-
sole is modular and modules can be replaced for imme- Stop Relay
diate repair. The power supply is external and plug in.
ICs are plug in. The rotary faders are plug in. ‘B’ input
‘A’ input mic preamp
For board level part replacement, this page displays a SSM2019
physical board layout with descriptions of the functions mic preamp
of each IC. For repair, simply replace the ICs associated SSM2019
2N3904
with the function that has failed on the module. relay drivers
Pgm/Aud Logic
CD4049
A/B Logic
CD4049
Utl/CueLogic
CD4049
A/B analog
switch
CD4052
A/B sum amp On-Off Tally Logic

NE5532 2N3904
Channel
On-off
Fader amp Logic
NE5532 CD4049
Cue bus
assign switch
CD4053
Pgm/Aud/Utl bus Pgm/Aud/Utl bus
assign switch assign switch
CD4053 CD4053
6.6
Stereo Line Module

The MARC-15 console is designed for modular
replacement rather than component level field ‘A’ input Start Relay
repair. The console is modular and modules can be trimpots
replaced for immediate repair. The power supply is Stop Relay
‘B’ input
external and plug in. ICs are plug in. The rotary
trimpots
faders are plug in. ‘B’ input
‘A’ input mic preamp
For board level part replacement, this page displays NE5532
preamp
a physical board layout with descriptions of the
NE5532
functions of each IC. For repair, simply replace the 2N3904
ICs associated with the function that has failed on relay drivers
the module. Pgm/Aud Logic
CD4049
A/B Logic
CD4049
Utl/CueLogic
CD4049
A/B analog
switch
CD4052

NE5532 2N3904
Channel
On-off
Fader amp Logic
NE5532 CD4049
Cue bus
assign switch
CD4053
CD4053 CD4053
6.7
PC-USB module
The MARC-15 console is designed for modular USB chip
replacement rather than component level field PCM2900 Record
repair. The console is modular and modules can be input amp
replaced for immediate repair. The power supply is 12MHz NE5532
external and plug in. ICs are plug in. The rotary clock
faders are plug in. ‘B’ input
mic preamp
For board level part replacement, this page displays SSM2019
a physical board layout with descriptions of the
functions of each IC. For repair, simply replace the 2N3904
ICs associated with the function that has failed on RS232 logic
the module. Pgm/Aud Logic drivers
CD4049
A/B Logic
CD4049
Utl/CueLogic
CD4049
Play Filter amp

NE5532
Channel
On-off
Fader amp Logic
NE5532 CD4049
Cue bus
assign switch
CD4053
CD4053 CD4053
6.8
Phone Module
Input
The MARC-15 console is designed for modular trimpot
replacement rather than component level field Start Relay
repair. The console is modular and modules can be
Output
replaced for immediate repair. The power supply is Stop Relay
trimport
external and plug in. ICs are plug in. The rotary
faders are plug in.
Phone output
Phone input
amp
For board level part replacement, this page displays preamp
NE5532
a physical board layout with descriptions of the NE5532
functions of each IC. For repair, simply replace the
2N3904
ICs associated with the function that has failed on
relay drivers
the module. Pgm/Aud Logic
CD4049
A/B Logic
CD4049
Utl/CueLogic
CD4049
A/B analog
switch
CD4052

NE5532 2N3904
Channel
On-off
Fader amp Logic
NE5532 CD4049
Cue bus
assign switch
IMPORTANT CD4053
Two phone modules can be placed in
a single mainframe. They are... Pgm/Aud/Utl bus Pgm/Aud/Utl bus
1) MARC-PHN1 assign switch assign switch
2) MARC-PHN2 CD4053 CD4053
Two PHN1s or two PHN2 modules

should not be used in the same main-
frame
6.9
Studio Monitor Module

The MARC-15 console is designed for modular
Ext 1
replacement rather than component level field Monitor Left
Input
repair. The console is modular and modules can be Output trimpot
trimpots
replaced for immediate repair. The power supply is Monitor Left
external and plug in. ICs are plug in. The rotary Ext 1 Output amp
faders are plug in. Input NE5532
amp
For board level part replacement, this page displays Monitor Right
NE5532
a physical board layout with descriptions of the Output trimpot
functions of each IC. For repair, simply replace the Monitor Right
ICs associated with the function that has failed on Output amp
the module. NE5532
Earphone Left
Output amp
NE5532
Earphone Right
Output amp
NE5532
Muting analog
switch
CD4053
Audio input Ext/P/A/U

from Output analog switch
Board CD4052
Quad AND gate Dual AND gate

switch logic switch logic
74ALS08 74AC74
Muting
Relay
Muting
Relay driver
2N3904
6.10
Output Module
The MARC-15 console is designed for
modular replacement rather than com- Monitor
Headphone Output amps
NE5532
ponent level field repair. The console is Output amps
NE5532
Cue
modular and modules can be replaced power amp
LM386 Utl Mono mix
for immediate repair. The power supply Ext 1
Output Amp
Talkback NE5532
is external and plug in. ICs are plug in. Monitor
Input amp
amp
NE5532
The rotary faders are plug in. NE5532
Timer logic
For board level part replacement, this Hex inverter
CD4049
Utl Output Amps
NE5532
page displays a physical board layout Timer logic
with descriptions of the functions of Monitor
Selector
Quad AND
74ALS08
each IC. For repair, simply replace the Logic
Quad AND
ICs associated with the function that 74ALS08 Timer logic
Hex inverter
has failed on the module. Monitor

Selector
CD4049
Logic Aud Mono mix

Dual Flip flop Output Amp
74AC74 NE5532
Aud Output Amps

Mute
NE5532
Relay
Muting
analog Driver
switch 2N3904
CD4053
Headphone
mix amp Monitor
NE5532 mix amp
NE5532
Pgm Mono mix
Monitor Output Amp
Selector NE5532
Switch
Headphone CD4052
Autocue
switch
CD4053
Pgm Output Amps
NE5532
Utl mix Aud mix Pgm mix

NE5532 NE5532 NE5532
Headphone
Cue Sum Pgm Sum Aud Sum Utl Sum Phone Sum Amps
Amps Amp
Amp Amp Amp NE5532
LM386
NE5532 NE5532 NE5532 NE5532
6.11
Factory Service
Technical Questions
Arrakis Systems maintains a staff of friendly broadcast engineers, design engineers, and technicians who have many
years of in depth field experience in broadcasting. All of our technical resources are available to you to answer installa-
tion questions, solve problems, and repair equipment. If you have a question or problem, please feel free to call us. We
can not solve every problem, but our people are here to try.
Our customer support department is open from: 8AM - 4:30PM, Monday -Friday (except for Holidays)
Voice: 970-461-0730
Fax: 970-663-1010
email: consolesupport@arrakis-systems.com
IMPORTANT: Collect calls will not be accepted
Warranty Service for the MARC console hardware

Arrakis Systems will replace parts that fail due to defects in material or workmanship during the warranty period of the product. This warranty is extended
to the original owner only.
Arrakis Systems does not warranty equipment that has failed due to improper installation, abuse, or acts of nature. It is solely at the discretion of Arrakis
Systems as to whether a part is defective under warranty conditions.
Warranty Service Procedure for the MARC console hardware

Arrakis Systems assumes that its customers have on staff (or access to) competent technical personnel and adequate test equipment.
If a product fails, Arrakis will first seek to ascertain the problem over the phone and solve it at the modular replacement level where we find the specific
part(s) that have failed and repair or replace them. This is the least expensive and time consuming solution for you. Depending on the circumstances and at
our discretion, Arrakis will replace the specific PC board suspected to be at fault. If replacing PC boards does not resolve the problem, then the console is to
be returned to the factory where it will we repaired and returned to you. Repair time at the factory is normally two week days.
Shipping- The customer is responsible for payment for shipping to the factory. Parts returned to the factory freight collect will be refused. Return shipping
over and above the cost of UPS ground will be born by the customer. In the case of international shipments, all cost of shipping and duties are born by the
customer, both to and from the factory.
Under no circumstances will Arrakis replace a defective console with a replacement console.
IMPORTANT- Under no circumstances does Arrakis take any responsibility for non-factory technical expenses.
6.12
Factory Service (continued)
Warranty Replacement of Parts

To have a part replaced under warranty, you must:
1) Provide a valid product serial number that is within the warranty period
2) Contact the Arrakis customer service department and describe what parts need replacement and the circumstances of the
failure. (The customer service department may require on site test by your technician to confirm the part replacement is appro-
priate for your problem.)
3) A Return Merchandise Authorization Number (RMA #) will be issued when a part s to be returned to the factory.
4) Return ALL defective parts to the factory (shipping prepaid) to the attention of the “Customer Service Departent” with a letter
including your name, address, call letters, serial number, date, and valid RMA #.
5) Parts replaced under warranty will be shipped at Arrakis expense by UPS ground. Any expense over and above UPS ground will
be born by the customer.
IMPORTANT- If the defective parts are not returned to the factory within 30 days, you will be invoiced for them and it will be
assumed that they do not fall under warranty. Further customer service will be denied until the defective parts are returned of
paid for.
Spare Parts
A spare parts kit is provided with the console. These parts are provided in case of emergency failure and normal infant mortality.
These parts, when used to replace failures, are not replaced under warranty.
Purchased Parts
An Arrakis customer may purchase spare or replacement parts from the factory. The cost of the parts will include a service
charge, the cost for the parts, and the cost of the shipping.
Parts may be purchased by:

1) C.O.D. shipping
2) Valid and approved Credit Card (below our current credit limit)
3) Prepaid by company check (shipment after check clears the bank)
4) Wire transfer of funds
5) Through an Arrakis authorized dealer
Arrakis does not sell items on open account.
IMPORTANT- Non payment or late payment for parts will result in refusal of further customer service until the problem is
resolved.
6.13

MARC-15: Broadcast Console Family

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MARC-15: Broadcast Console Family

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RA DIO CON S OLE P RODUCTS

Thank you from Arrakis Systems inc.

Telephone Support for the ‘Free’ DHD-Live software

How to contact Arrakis Systems

Arrakis Systems inc. is located at Arrakis Systems inc

Business Hours: 8:00am - 4:30pm mountain time

Contact: Voice: 970-461-0730

Having difficulty contacting Arrakis?

Hazard / Warning Label

WARNING: SHOCK HAZARD - DO NOT OPEN

CAUTION : TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT

WARNING : TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

The Exclamation Point symbol, within an equilateral

The Lightning Flash With Arrowhead symbol, within an

WARNING —This equipment generates, uses and can

Software End User License Agreement

Section Two Product Description

Section Three Operation Instructions

Section Four Installation Instructions

Section Five DHD-Live

Section Six Service and Maintenance

The modular mainframe...

The console is compact, low profile,

The meter panel hinges for

Many modules to choose from...

Input modules Option Output module

Mic Stereo PC USB Phone Studio Output / Monitor / Timer

A/B A/B Rec Off

Pgm Pgm Pgm Pgm Pgm Start Pgm

Aud Aud Aud Aud Aud Stop Aud

Utl Utl Utl Utl Utl Auto Utl

Cue Cue Cue Cue Timer

Mic Line PC USB Phone Studio Output Timer

‘Free’ DHD-Live software for ‘Live On Air’ with the MARC-15

To contact one of our support agents, please email:

Arrakis Systems inc.

Mic 1 Mic 2 PC USB Phone 1 Phone 2 Studio Output Timer Control

The console is compact, low profile,

Audition, & Utility.

Mono mic level Input Modules

CHANNEL ON AND OFF

CHANNEL ON AND OFF LOGIC Audition Bus

sole cue system. Assignment

OUTPUT BUS ASSIGNMENT Cue Bus

Stereo Line Level Input Module

CHANNEL ON AND OFF

OUTPUT BUS ASSIGNMENT

Cue audio will be heard in the speaker in the VU meter housing

The PC-USB input Module

CHANNEL ON AND OFF

CHANNEL ON AND OFF LOGIC Aud

ware, the channel on will start the playlist on the PC to Cue

The Telephone Input Module

yellow OFF button.

(start) and to release the phone line (stop) Assignment

HYBRID AUDIO FEED

The Control Room Monitor system

MONITOR MUTING Start Pgm