INSTALLATION MANUAL

KTR 908
VHF COMM TRANSRECEIVER

KFS 598/598A
VHF COMM CONTROL UNITS
MANUAL NUMBER 006-00197-0008
REVISION 8 NOVEMBER, 2005
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REVISION HISTORY
KTR 908 / KFS 598/598A Installation Manual

Part Number: 006-00197-XXXX

For each revision, add, delete, or replace as indicated.

Rev. 7, Sept/2004

ITEM ACTION
Full Reprint Replaces all previous revisions.

Rev. 8, Nov/2005

ITEM ACTION
Full Reprint Replaces all previous revisions.

Removed NVG information.

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TABLE OF CONTENTS
ITEM PAGE

SECTION I
GENERAL INFORMATION
1.1 INTRODUCTION............................................................................................................ 1-1
1.2 EQUIPMENT DESCRIPTION ........................................................................................ 1-1
1.3 TECHNICAL CHARACTERISTICS ............................................................................... 1-2
1.3.1 KTR 908 TRANSCEIVER .............................................................................................. 1-2
1.3.2 KTR 908 TRANSMITTER .............................................................................................. 1-3
1.3.3 KTR 908 RECEIVER...................................................................................................... 1-3
1.3.4 KFS 598 CONTROL UNIT ............................................................................................. 1-4
1.3.5 KFS 598A CONTROL UNIT........................................................................................... 1-5
1.3.6 TSO CLASSIFICATIONS............................................................................................... 1-6
1.4 UNITS AND ACCESSORIES SUPPLIED ..................................................................... 1-7
1.4.1 KTR 908 VHF COMMUNICATIONS TRANSCEIVER.................................................... 1-7
1.4.2 KFS 598 CONTROL UNIT ............................................................................................. 1-7
1.4.3 KFS 598A CONTROL UNIT........................................................................................... 1-9
1.4.4 KTR 908 INSTALLATION KIT...................................................................................... 1-11
1.4.5 KFS 598 INSTALLATION KIT ...................................................................................... 1-11
1.4.6 KFS 598A INSTALLATION KIT.................................................................................... 1-12
1.5 ACCESSORIES REQUIRED, BUT NOT SUPPLIED .................................................. 1-12
1.6 TOOLS REQUIRED, BUT NOT SUPPLIED................................................................ 1-12
1.7 LICENSE REQUIREMENTS........................................................................................ 1-13
1.8 CONTINUED AIRWORTHINESS INSTRUCTIONS .................................................... 1-13
1.8.1 EQUIPMENT................................................................................................................ 1-13
1.8.2 WIRES/COAX CABLES ............................................................................................... 1-13

SECTION II
INSTALLATION
2.1 GENERAL...................................................................................................................... 2-1
2.2 UNPACKING AND INSPECTING EQUIPMENT ........................................................... 2-1
2.3 EQUIPMENT INSTALLATION ...................................................................................... 2-1
2.3.1 COOLING CONSIDERATIONS ..................................................................................... 2-1
2.3.2 KTR 908 MECHANICAL INSTALLATION...................................................................... 2-1
2.3.3 KTR 908 CABLE HARNESS AND CONNECTOR ASSEMBLY..................................... 2-2
2.3.4 KFS 598/KFS 598A MECHANICAL INSTALLATION..................................................... 2-2

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ITEM PAGE

2.3.5 KFS 598/598A CABLE HARNESS AND CONNECTOR ASSEMBLY ........................... 2-2
2.3.6 KFS 598A CONTROL PIN FUNCTIONS ....................................................................... 2-2
2.4 POST INSTALLATION CHECK .................................................................................. 2-11
2.4.1 KFS 598A VERIFICATION TEST ................................................................................ 2-11

SECTION III
OPERATION
3.1 GENERAL...................................................................................................................... 3-1
3.1.1 KFS 598 OPERATING PROCEDURES......................................................................... 3-1
3.1.2 KFS 598A OPERATING PROCEDURES ...................................................................... 3-2
3.1.3 FREQUENCY MODE..................................................................................................... 3-3
3.1.4 CIVIL OPERATION (J5982-P7 open) ............................................................................ 3-3
3.1.5 MILITARY OPERATION (J5982-P7 grounded) ............................................................. 3-4
3.1.6 DEFAULT MODE ........................................................................................................... 3-5
3.1.7 REMOTE TRANSFER ................................................................................................... 3-5
3.1.8 REMOTE CHANNEL...................................................................................................... 3-5

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ITEM PAGE

FIGURE 2-1 CRIMPING AND INSERTION/EXTRACTION TOOLS ................................. 2-4

FIGURE 2-2 KTR 908 CONNECTOR J9081 PINOUT DIAGRAM .................................... 2-5
FIGURE 2-3 KFS 598 CONNECTOR J5981 PINOUT DIAGRAM .................................... 2-6
FIGURE 2-4 KFS 598A CONNECTOR J598A1 PINOUT DIAGRAM ............................... 2-7
FIGURE 2-5 KFS 598A CONNECTOR J598A2 PINOUT DIAGRAM ............................... 2-8
FIGURE 2-6 BNC CABLE ASSEMBLY............................................................................. 2-9
FIGURE 2-7 "SUB-MIN D" CONNECTOR ASSEMBLIES .............................................. 2-13
FIGURE 2-8 KTR 908 INSTALLATION........................................................................... 2-15
FIGURE 2-9 KFS 598 INSTALLATION ........................................................................... 2-17
FIGURE 2-10 KFS 598A INSTALLATION ........................................................................ 2-19
FIGURE 2-11 KTR 908/KFS 598 INTERCONNECT......................................................... 2-21
FIGURE 2-12 KTR 908/KFS 598A INTERCONNECT ...................................................... 2-23
FIGURE 2-13 KTR 908/KFS 598A TANDEM INTERCONNECT ...................................... 2-25
FIGURE 2-14 KTR 908/KFS 598A REPEATER INTERCONNECT .................................. 2-27
FIGURE 3-1 KFS 598 CONTROL FUNCTIONS ............................................................... 3-1
FIGURE 3-2 KFS 598A CONTROL FUNCTIONS ............................................................ 3-2

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TABLE 1-1 KTR 908 OPTIONAL CHARACTERISTICS ................................................. 1-7

TABLE 1-2 KFS 598 OPTIONAL CHARACTERISTICS ................................................. 1-8
TABLE 1-3 KFS 598A OPTIONAL CHARACTERISTICS ............................................... 1-9

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SECTION I
GENERAL INFORMATION

1.1 INTRODUCTION
This manual contains information relative to the physical, mechanical and electrical characteristics
of the Bendix/King Gold Crown KTR 908 VHF Communications Transceiver, and the KFS 598 and
KFS 598A Control Units. Installation and operating procedures are also included.

1.2 EQUIPMENT DESCRIPTION

The KTR 908 with either a KFS 598 or KFS 598A Control Unit comprises a complete system
which will provide two way voice communications from 118.000 MHz to 135.975 MHz in 25 kHz
increments. Operation from 118.000 MHz to 136.975 MHz or 118.000 MHz to 151.975 MHz is
possible with the appropriate version KTR 908 and control unit.
Mechanical type control units manufactured by Gables Engineering, Coral Gables, Florida, may
be used in lieu of the KFS 598 or KFS 598A.
The KTR 908 is an all solid state design which allows rigid mounting in any position. Frequency
and mode information is communicated with the control unit via a Honeywell format serial data
bus.
Various versions available offer 25 kHz or 50 kHz receiver selectivity, extended frequency opera-
tion from 118.000 MHz to 151.975 MHz, SELCAL/DF output, and a low power transmitter option.
Refer to section 1.4.1 KTR 908 VHF COMMUNICATIONS TRANSCEIVER for specific options
available to each version of the KTR 908.
Both the KFS 598 and KFS 598A Control Units may be panel or console mounted and feature gas
discharge displays with automatic dimming. The KFS 598 is the standard control unit and features
Active/Standby frequency selection in which channeling is accomplished by changing the frequen-
cy displayed in the standby window and then transferring this frequency into the Active window via
a transfer button on the control unit front panel or an optional remote transfer button.
Optional features available in the KFS 598 are version dependent. Refer to section 1.4.2 KFS 598
CONTROL UNIT for specific options available to each version of the KFS 598. Generally, these
options are as follows:
• Extended Frequency option which allows operation from 118.000 MHz to 151.975 MHz when
used with compatible version KTR 908.
• Black or gray bezel.
• 5 Vdc or 28 Vdc bezel lighting.
• Diffused or non-diffused display lens.
• Available with or without volume control.
• Available with or without ON/OFF switch.
• Available with 500 ohm volume control compatible with audio systems in certain Beech King
Air installations.
The KFS 598A is an optional control unit which offers all the features and options available in the
KFS 598 and may be used, depending on version, in a tandem Master/Slave control unit configu-
ration or as an integral part of a Frequency Management System. Refer to section 1.4.3
KFS 598A CONTROL UNIT for specific options available to each version of the KFS 598A.

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Generally, features common to all versions of the KFS 598A which are not available in the
KFS 598 include:
• Pre-programmable frequencies which may be later recalled for use by channel number.
• Remote channeling capability which allows the system to step through previously pro-
grammed channels via a remote channel button.
• Direct channeling of frequency displayed in Active window.
• Civil or Military operating modes.
• Display dimmer override.

1.3 TECHNICAL CHARACTERISTICS

1.3.1 KTR 908 TRANSCEIVER

TSO COMPLIANCE: TSO C37b, and C38b

SOFTWARE CERTIFICATION CATEGORY: RTCA DO-160A Env Cat
ENVIRONMENTAL CERTIFICATION: A2D2/A/MNO/EXXXXSZ/AB/A/AB/A
APPLICABLE DOCUMENTS:
064-1023-00/02/04/06/08/10/12/14: RTCA DO-156 Class C and D
064-1023-01/03/05/07/09/11/13/15: RTCA DO-156 Class A and B
064-1023-00/01/02/03/04/05/06/07: RTCA DO-157 Class 3
064-1023-08/09/10/11/12/13/14/15: RTCA DO-157 Class 4
NON TSO’D FUNCTIONS: None
ICAO ANNEX 10 FM INTERFERENCE ICAO Modified (MOD 3) units meet the Inter-
IMMUNITY: modulation and Desense criteria of DO-186
Paragraph 2.2.10 Intermodulation
Paragraph 2.2.11 Desensitization
ICAO Annex 10
Paragraph 4.7.3.1 Intermodulation
Paragraph 4.7.3.2 Desensitization
PHYSICAL DIMENSIONS: See FIGURE 2-8 KTR 908 INSTALLATION
WEIGHT See FIGURE 2-8 KTR 908 INSTALLATION
TEMPERATURE RANGE: -55°C to +70°C
ALTITUDE: 55,000 Feet
POWER REQUIREMENTS:
Receive: 27.5 Vdc at 0.4 A max
Transmit: 27.5 Vdc at 9.0 A max
FREQUENCY RANGE: 118.000 MHz to 136.975 MHz in 25 kHz incre-
(Version dependent, see 1.4.1 KTR 908 VHF ments OR 118.000 MHz to 151.975 MHz in 25
COMMUNICATIONS TRANSCEIVER.) kHz increments

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1.3.2 KTR 908 TRANSMITTER

POWER OUTPUT:
(Version dependent, see 1.4.1 KTR 908 VHF
COMMUNICATIONS TRANSCEIVER)

20 Watt TX: 20 watts minimum, 26 watts maximum from

118.000 MHz to 136.975 MHz
16 watts minimum from 136.000 to 151.975
MHz

10 Watt TX: 8 watts minimum, 12 watts maximum for all fre-

quencies
DUTY CYCLE: 1:4 (1 min transmit - 4 min receive)
MODULATION CAPABILITY: No less than 85% and no more than 98%
SIDETONE OUTPUT: Up to 100 mW into 500 ohm load (adjustable)
HARMONIC CONTENT: Greater than 60 dB down from carrier level
SPURIOUS OUTPUTS: No less than 60 dB below carrier level
MICROPHONE: Dynamic with transistorized preamp or carbon.
Must provide no less than 120 mVrms into 100
ohm load

1.3.3 KTR 908 RECEIVER

SENSITIVITY: 2 µV (hard) for no less than 6 dB signal plus

noise-to-noise with 1000 Hz, 30% modulated
(with compressor disabled)
SELECTIVITY:
(Version dependent, see 1.4.1 KTR 908 VHF
COMMUNICATIONS TRANSCEIVER)

6 dB bandwidth No less than 20.6 kHz with no less than 10.0

kHz on each side

60 dB bandwidth No more than 39.2 kHz with no more than 20.0

kHz on each side
OR
6 dB bandwidth No less than 30 kHz with no less than 14.5 kHz
on each side

60 dB bandwidth No more than 40 kHz on each side

AUDIO OUTPUT: No less than 100 mW into 500 ohm load

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1.3.3 KTR 908 RECEIVER (cont).

AUDIO RESPONSE: No more than 6 dB variation from 350 Hz to

2500 Hz
SELCAL/DF OUTPUT: 0.25 to 0.50 Vrms (no load) with 100 µV input
modulated 1000 Hz at 30%
AGC CHARACTERISTICS: 5 µV to 200 mV for 3 dB Audio Level Change
SQUELCH: Automatic squelch (internally adjustable carrier
to noise) with manual disable and carrier
squelch override
SPURIOUS RESPONSES AND CROSS At least 80 dB down
MODULATION PRODUCTS:

1.3.4 KFS 598 CONTROL UNIT

TSO COMPLIANCE: TSO C37b, C38b

SOFTWARE CERTIFICATION CATEGORY: RTCA DO-160A Env Cat
ENVIRONMENTAL CERTIFICATION: A1D1/A/KPS/XXXXSZXA/AB/A
NON TSO’D FUNCTIONS: None
PHYSICAL DIMENSIONS: See FIGURE 2-9 KFS 598 INSTALLATION
WEIGHT See FIGURE 2-9 KFS 598 INSTALLATION
TEMPERATURE RANGE: -20° to +55° C
FREQUENCY CONTROL RANGE: (Version 118.000 MHz to 135.975 MHz in 25 kHz incre-
dependent, see 1.4.2 KFS 598 CONTROL ments OR 118.000 MHz to 136.975 MHz in 25
UNIT) kHz increments OR 118.000 MHz to
151.975 MHz in 25 kHz increments
POWER REQUIREMENTS: + 10 ± 0.5 Vdc at 155 mA max
- 26 ± 1.0 Vdc at 6 mA max
NOTE: All power supplied by KTR 908 +185 ± 7.0 Vdc at 6.2 mA max
LIGHTING: (Version dependent, 5 Vdc at 200 mA max
see 1.4.2 KFS 598 CONTROL UNIT) 28 Vdc at 50 mA max
CONTROL PIN CHARACTERISTICS:
Remote Transfer (P5981 Pin 2): Active state = Signal Ground
Inactive state = Open

PTT (P5981 Pin 3): Active state = LO (No more than 3.0 Vdc)
Inactive state = Open

Squelch Test (P5981 Pin 25): Active state = LO (No more than 0.5 Vdc)
Inactive state = HI (No more than 9.0 Vdc)

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1.3.5 KFS 598A CONTROL UNIT

TSO COMPLIANCE: TSO C37c AND C38c

SOFTWARE CERTIFICATION CATEGORY: RTCA DO-160A Env Cat
ENVIRONMENTAL CERTIFICATION: A1D1/A/KPS/XXXXXSZXA/AB/A
NON TSO’D FUNCTIONS: None
PHYSICAL DIMENSIONS: See FIGURE 2-10 KFS 598A INSTALLATION
WEIGHT See FIGURE 2-10 KFS 598A INSTALLATION
TEMPERATURE RANGE: -20°C to +55°C
FREQUENCY CONTROL RANGE: (Version 118.000 to 135.975 MHz in 25 kHz increments
dependent, see 1.4.3 KFS 598A CONTROL OR 118.000 MHz to 136.975 MHz in 25 kHz in-
UNIT) crements OR 118.000 MHz to 151.975 MHz in
25 kHz increments
POWER REQUIREMENTS: + 10 ± 0.5 Vdc at 450 mA max
- 26 ± 1.0 Vdc at 6 mA max
NOTE: All power is supplied by the KTR 908 +185 ± 7.0 Vdc at 6.2 mA max
LIGHTING: (Version dependent, see 1.4.3 5 Vdc at 200 mA max OR
KFS 598A CONTROL UNIT) 28 Vdc at 50 mA OR
115 Vac, 400 Hz at 500 mA max (Display)
115 Vac, 400 Hz at 1 A max (Nomenclature)
27.5 Vdc at 500 mA max (LCD heater)
CONTROL PIN CHARACTERISTICS:

Program Secure (P5981 Pin 1): Active state = Signal Ground

Inactive state = Open

Remote Transfer (P5981 Pin 2): Active state = Signal Ground

Inactive state = Open

PTT (P5981 Pin 3): Active state = LO (No more than 3.0 Vdc)
Inactive state = Open

Auto Dim Override (5981 Pin 13): Active state = LO (No more than 0.5 Vdc)
Inactive state = Open

Mic Key In (P5981 Pin 21): Active state = LO (No more than 3.0 Vdc)
Inactive state = Open

Squelch Test (P5981 Pin 25): Active state = LO (No more than 0.5 Vdc)
Inactive state = Open

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1.3.5 KFS 598A CONTROL UNIT (cont).

CONTROL PIN CHARACTERISTICS (cont):

Master/Slave (P5982 Pin 3): Signal Ground = Master Unit

Open = Slave Unit

Remote Channel (P5982 Pin 4): Active state = Signal Ground

Inactive state = Open

Civil/Military (P5982 Pin 7): Signal Ground = Military Mode

Open = Civil Mode

Control Disable (P5982 Pin 8): Active state = Signal Ground

Inactive state = Open

1.3.6 TSO CLASSIFICATIONS

RTCA DO-160A Environmental Categories:
KTR 908 KFS 598 KFS 598A
Temperature and Altitude A2D2 A1D1 A1D1
Humidity A A A
Vibration MNO KPS KPS
Explosion E X X
Waterproofness X X X
Hydraulic Fluid X X X
Sand and Dust X X X
Fungus Resistance X X X
Salt Spray S S S
Magnetic Effect Z Z Z
Power Input AB X X
Voltage Spike A A A
Audio Freq Conducted Susceptibility AB AB AB
Electromagnetic Compatibility A A A

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1.4 UNITS AND ACCESSORIES SUPPLIED

1.4.1 KTR 908 VHF COMMUNICATIONS TRANSCEIVER
The technical characteristics of the KTR 908 P/N 064-1023-XX described in Section 1.3 TECHNI-
CAL CHARACTERISTICS include some optional, version dependent characteristics. The table
below lists the optional characteristics available with each version:

VERSION 25 kHz 50 kHz 118 to 136.975 118 to 151.975 20 WATT 10 WATT SELCAL/DF
SELECT SELECT MHz MHz TX TX OUTPUT
-00 X - X - X - -
-01 - X X - X - -
-02 X - - X X - -
-03 - X - X X - -
-04 X - X - X - X
-05 - X X - X - X
-06 X - - X X - X
-07 - X - X X - X
-08 X - X - - X -
-09 - X X - - X -
-10 X - - X - X -
-11 - X - X - X -
-12 X - X - - X X
-13 - X X - - X X
-14 X - - X - X X
-15 - X - X - X X

TABLE 1-1 KTR 908 OPTIONAL CHARACTERISTICS

1.4.2 KFS 598 CONTROL UNIT

The KFS 598 P/N 071-1215-XX is the standard control unit for the KTR 908. The technical char-
acteristics of the KFS 598 described in Section 1.3 TECHNICAL CHARACTERISTICS include
some optional, version dependent characteristics.
NOTE:
Versions 071-1215-00 through 071-1215-23 are no
longer available through the factory.

The following table lists the optional characteristics available with each version:

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VERSION 118 to 118 to 118 to BEZEL LIGHT DIFF NON- CONTROLS

135.975 136.975 151.975 LENS DIFF
MHz MHz MHz LENS
-24 X - - BLK 5V X - VOL/ON/OFF/TEST
-25 X - - BLK 28V X - VOL/ON/OFF/TEST
-26 X - - GRY 5V X - VOL/ON/OFF/TEST
-27 X - - GRY 28V X - VOL/ON/OFF/TEST
-29 X - - BLK 5V X - TEST
-30 X - - BLK 28V X - TEST
-31 X - - GRY 5V X - TEST
-32 X - - GRY 28V X - TEST
-34 X - - BLK 5V X - ON/OFF/TEST
-35 X - - BLK 28V X - ON/OFF/TEST
-36 X - - GRY 5V X - ON/OFF/TEST
-37 X - - GRY 28V X - ON/OFF/TEST
-38 - - X BLK 28V - X VOL/ON/OFF/TEST
-39 - - X BLK 5V X - VOL/ON/OFF/TEST
-40 X - - BLK 28V - X VOL/ON/OFF/TEST
-41 X - - BLK 28V X - ON/OFF/TEST/VOL*
-42 - - X BLK 28V X - ON/OFF/TEST
-43 - - X BLK 28V X - VOL/ON/OFF/TEST
-44 - - X BLK 28V X - ON/OFF/TEST/VOL*
-45 - - X GRY 5V X - TEST
-54 - X - BLK 5V X - VOL/ON/OFF/TEST
-55 - X - BLK 28V X - VOL/ON/OFF/TEST
-56 - X - GRY 5V X - VOL/ON/OFF/TEST
-57 - X - GRY 28V X - VOL/ON/OFF/TEST
-59 - X - BLK 5V X - TEST
-60 - X - BLK 28V X - TEST
-61 - X - GRY 5V X - TEST
-62 - X - GRY 28V X - TEST
-64 - X - BLK 5V X - ON/OFF/TEST
-65 - X - BLK 28V X - ON/OFF/TEST
-66 - X - GRY 5V X - ON/OFF/TEST
-67 - X - GRY 28V X - ON/OFF/TEST
-70 - X - BLK 28V - X VOL/ON/OFF/TEST
-71 - X - BLK 28V X - ON/OFF/TEST/VOL*
* 500 ohm volume

TABLE 1-2 KFS 598 OPTIONAL CHARACTERISTICS

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1.4.3 KFS 598A CONTROL UNIT

The KFS 598A P/N 071-1282-XX is an optional replacement for the KFS 598 in single control unit
installations, and is required for tandem control unit installations or Frequency Management ap-
plications.
Note:
Versions -41 and -44 are not recommended for tan-
dem installations. Versions 071-1282-00 through
071-1282-23 are no longer available through the fac-
tory.

The technical characteristics of the KFS 598A described in Section 1.3 TECHNICAL CHARAC-
TERISTICS include some optional, version dependent characteristics. The table below lists the
optional characteristics available with each version:
VERSION 118 to 118 to 118 to BEZEL LIGHT DIFF NON- CONTROLS
135.975 136.975 151.975 LENS DIFF
MHz MHz MHz LENS
-24 X - - BLK 5V X - VOL/ON/OFF/TEST
-25 X - - BLK 28V X - VOL/ON/OFF/TEST
-26 X - - GRY 5V X - VOL/ON/OFF/TEST
-27 X - - GRY 28V X - VOL/ON/OFF/TEST
-29 X - - BLK 5V X - TEST
-30 X - - BLK 28V X - TEST
-31 X - - GRY 5V X - TEST
-32 X - - GRY 28V X - TEST
-34 X - - BLK 5V X - ON/OFF/TEST
-35 X - - BLK 28V X - ON/OFF/TEST
-36 X - - GRY 5V X - ON/OFF/TEST
-37 X - - GRY 28V X - ON/OFF/TEST
-38 - - X BLK 28V - X VOL/ON/OFF/TEST
-39 - - X BLK 5V X - VOL/ON/OFF/TEST
-40 X - - BLK 28V - X VOL/ON/OFF/TEST
-41 X - - BLK 28V X - ON/OFF/TEST/VOL*
-42 - - X BLK 28V X - ON/OFF/TEST
-43 - - X BLK 28V X - VOL/ON/OFF/TEST
-44 - - X BLK 28V X - ON/OFF/TEST/VOL*
-45 - - X GRY 5V X - TEST
* 500 ohm volume

TABLE 1-3 KFS 598A OPTIONAL CHARACTERISTICS

(Sheet 1 of 2)

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VERSION 118 to 118 to 118 to BEZEL LIGHT DIFF NON- CONTROLS

135.975 136.975 151.975 LENS DIFF
MHz MHz MHz LENS
-64 - X - BLK 5V X - VOL/ON/OFF/TEST
-65 - X - BLK 28V X - VOL/ON/OFF/TEST
-66 - X - GRY 5V X - VOL/ON/OFF/TEST
-67 - X - GRY 28V X - VOL/ON/OFF/TEST
-69 - X - BLK 5V X - TEST
-70 - X - BLK 28V X - TEST
-71 - X - GRY 5V X - TEST
-72 - X - GRY 28V X - TEST
-74 - X - BLK 5V X - ON/OFF/TEST
-75 - X - BLK 28V X - ON/OFF/TEST
-76 - X - GRY 5V X - ON/OFF/TEST
-77 - X - GRY 28V X - ON/OFF/TEST
-80 - X - BLK 28V - X VOL/ON/OFF/TEST
-81 - - X BLK 28V X - ON/OFF/TEST/VOL*
* 500 ohm volume

TABLE 1-3 KFS 598A OPTIONAL CHARACTERISTICS

(Sheet 2 of 2)

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1.4.4 KTR 908 INSTALLATION KIT

The KTR 908 Installation Kit (P/N 050-01800-0001) is available with the crimp type connector
pins. Previously the kit was also available with the solder type connectors. (P/N 050-01800-0000).
However, this type is now obsolete and replaced by the crimp type connectors.
Listings for both the solder and crimp type kits are given below. Kit identification and contents are
as follows:

CRIMP TYPE 050-01800-0001

050-01800-0001 INSTL KIT CRMP Rev. 1

---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0001
---------------------------------------------------------------
030-00005-0000 CONN BNC UG 88C/ EA 1.00
030-01157-0011 SOCKET CRMP 20G EA 20.00
030-01173-0000 CONN SUB-D HSG 25S EA 1.00
030-01186-0000 CONTACT SKT CRIMP EA 4.00
030-01188-0000 PIN POLRZTN FEMALE EA 1.00
030-02351-0002 HOOD/LVR ASSY ST E EA 1.00
071-04022-0001 RACK ASSY EA 1.00

SOLDER TYPE 050-01800-0000 (OBSOLETE)

050-01800-0000 INSTL KIT SLDR Rev. AA

---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0000
---------------------------------------------------------------
030-00005-0000 CONN BNC UG 88C/ EA 1.00
030-01157-0011 SOCKET CRMP 20G EA 20.00
030-01173-0000 CONN SUB-D HSG 25S EA 1.00
030-01186-0000 CONTACT SKT CRIMP EA 4.00
030-01188-0000 PIN POLRZTN FEMALE EA 1.00
030-02351-0002 HOOD/LVR ASSY ST E EA 1.00
071-04022-0001 RACK ASSY EA 1.00

1.4.5 KFS 598 INSTALLATION KIT

The KFS 598 Installation Kit (P/N 050-01830-0001) is available with crimp type connector pins.
Previously, the kit was also available with solder type connectors (P/N 050-01830-0000). Howev-
er, this type is now obsolete and replaceable by the crimp type connectors.
Listings for both the solder and crimp type kits are given below. Kit identification and contents are
as follows:

CRIMP TYPE 050-1830-0001

050-01830-0001 INSTL KIT CRMP Rev. 3
---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0001
---------------------------------------------------------------
030-01157-0011 SOCKET CRMP 20G EA 28.00
030-01174-0000 CONN, D-SUB, RECPT EA 1.00
030-01188-0000 PIN POLRZTN FEMALE EA 1.00
030-01222-0000 CONN, D-SUB, HOOD, EA 1.00
092-00052-0002 NUT ANCHOR 6-32 EA 2.00

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B KTR 908 / KFS 598/598A

SOLDER TYPE 050-1830-0000 (OBSOLETE)

050-01830-0000 INSTL KIT SLDR Rev. 1
---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0000
---------------------------------------------------------------
030-02358-0006 CONN SUB-D PC 29S EA 1.00
092-00052-0002 NUT ANCHOR 6-32 EA 2.00

1.4.6 KFS 598A INSTALLATION KIT

The KFS 598A Installation Kit (P/N 050-02091-0001) is available with crimp type connector pins.
Two kits will be required for tandem installations.
Previously the kit was also available with solder type connectors (P/N 050-02091-0000). Howev-
er, this type is now obsolete and replaceable by the crimp type connectors.
Listings for both the solder and crimp type kits are given below. Kit identification and contents are
as follows:

CRIMP TYPE 050-02091-0001

050-02091-0001 INSTALLATION KIT Rev. 0
---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0001
---------------------------------------------------------------
030-01157-0011 SOCKET CRMP 20G EA 36.00
030-01171-0000 CONN SUB-D HSG 9S EA 1.00
030-01174-0000 CONN, D-SUB, RECPT EA 1.00
030-01188-0000 PIN POLRZTN FEMALE EA 2.00
030-01222-0000 CONN, D-SUB, HOOD, EA 1.00
030-02351-0000 HOOD/LVR ASSY ST E EA 1.00
092-00052-0002 NUT ANCHOR 6-32 EA 2.00

SOLDER TYPE 050-02091-0000 (OBSOLETE)

050-02091-0000 INSTALLATION KIT 0
---------------------------------------------------------------
SYMBOL PART NUMBER FIND NO DESCRIPTION UM -0000
---------------------------------------------------------------
030-02346-0011 CONN SUB-D CA 9S EA 1.00
030-02351-0000 HOOD/LVR ASSY ST E EA 1.00
030-02358-0006 CONN SUB-D PC 29S EA 1.00
092-00052-0002 NUT ANCHOR 6-32 EA 2.00

1.5 ACCESSORIES REQUIRED, BUT NOT SUPPLIED

A. Microphone.
B. Broadband Communications Antenna (50ohm) with coaxial cable.

1.6 TOOLS REQUIRED, BUT NOT SUPPLIED

A special crimping tool and positioner and an insertion/extraction tool are needed when using
crimp style connectors in KTR 908, KFS 598, or KFS 598A installations. Refer to FIGURE 2-1
CRIMPING AND INSERTION/EXTRACTION TOOLS for these tools and their part numbers.

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1.7 LICENSE REQUIREMENTS

The Federal Communications Commission requires that the operator of the transmitter of this
equipment hold a restricted radio telephone operators permit (FCC Form 753) or higher class li-
cense.
A permit may be obtained by a U.S. citizen from the nearest field office of the FCC; no examination
is required.
An Aircraft Station License is required for this equipment. Forms (FCC Form 404, New Aircraft
Station License, or FCC Form 405A, Renewal of Aircraft Station License) can be obtained from
your nearest FCC Field Office.
This equipment has been type accepted by the FCC and entered on their list of type accepted
equipment as Bendix/King KTR 908 and must be identified as Bendix/King KTR 908 on your FCC
Form 404, Aircraft Radio Station License Application.

CAUTION:
THE VHF TRANSMITTER IN THIS EQUIP-
MENT IS GUARANTEED TO MEET FEDERAL
COMMUNICATIONS COMMISSION ACCEP-
TANCE OVER THE OPERATING TEMPERA-
TURE RANGE ONLY WHEN A BENDIX/KING
CRYSTAL IS USED IN THE STABILIZED MAS-
TER OSCILLATOR. USE OF OTHER THAN
BENDIX/KING CRYSTALS IS CONSIDERED
AN UNAUTHORIZED MODIFICATION, AND
WILL VOID THE WARRANTY.

1.8 CONTINUED AIRWORTHINESS INSTRUCTIONS

1.8.1 EQUIPMENT
The instructions for continued airworthiness given in the TC or STC approvals for this product sup-
plements or supersedes the instructions for continued airworthiness in this manual.
Most Honeywell products are designed and manufactured to allow "on condition maintenance".
On condition maintenance is described as follows; There are no periodic service requirements
necessary to maintain continued airworthiness. No maintenance is required until the equipment
does not properly perform its intended function. When service is required, a complete perfor-
mance test should be accomplished following any repair action. Consult the appropriate unit Main-
tenance/Overhaul Manual for complete performance test information.
1.8.2 WIRES/COAX CABLES
During on-condition or regularly scheduled maintenance, inspect the wires and coax cables fol-
lowing the guidelines listed in AC 43,13-1 Chapter 15 as necessary.

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THIS PAGE IS RESERVED

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SECTION II
INSTALLATION
2.1 GENERAL
This section contains suggestions and factors to consider before installing the KTR 908, the
KFS 598, and the KFS 598A. Close adherence to these suggestions will assure a more satisfac-
tory performance from the equipment.
The conditions and test required for the TSO and MOPS approval of this article are minimum per-
formance standards. It is the responsibility of those installing this article either on or with a speci-
fied type or class of aircraft to determine that the aircraft installation conditions are within the TSO
and MOPS standards. These articles must have separate approval for installation in an aircraft.
Any features in this equipment outside the requirements of this applicable TSO and MOPS must
be evaluated and approved as part of the installation approval. The article may be installed only
if performed under 14 CFR part 43 or the applicable airworthiness requirements.
2.2 UNPACKING AND INSPECTING EQUIPMENT
Exercise extreme care when unpacking the equipment. Make a visual inspection of the unit for
evidence of damage incurred during shipment. If a claim for damage is to be made, save the ship-
ping container to substantiate the claim. The claim should be promptly filed with the transportation
company. It would be advisable to retain the container and packaging material after all equipment
has been removed in the event that equipment storage or reshipment should become necessary.
2.3 EQUIPMENT INSTALLATION
The KTR 908 installation will conform to standards designated by the customer, installing agency,
and existing conditions as to the unit location and type of installation. However, the following sug-
gestions should be considered before installing the KTR 908/KFS 598/KFS 598A. Close adher-
ence to these suggestions will assure a more satisfactory performance from the equipment.
2.3.1 COOLING CONSIDERATIONS
The greatest single contributor to increased reliability of all modern day avionics is to limit the max-
imum operating temperature of the individual units whether panel mounted or remote mounted.
While modern day circuit designs consume far less electrical energy, the watts per cubic inch dis-
sipated within the avionics units still remains much the same due to high density packaging tech-
niques utilized. Consequently, the importance of providing avionics cooling is essential to the life
span of the unit.
While each individual unit may or may not require forced air cooling, the combined heat load of
several units operating in a typical avionics location will significantly degrade the reliability of the
avionics if provisions for cooling are not incorporated in the initial installation. Failure to provide
cooling will certainly lead to increased avionics maintenance costs and may void the Bendix/King
warranty.
2.3.2 KTR 908 MECHANICAL INSTALLATION
A. Select the KTR 908 location. The unit can be rigidly mounted. Allow at least one
inch of free air space around the top and rear of the unit and one-half inch along
each side. Allow adequate space for installation of cables and connectors.
B. Refer to FIGURE 2-8 KTR 908 INSTALLATION for the KTR 908 mounting dimen-
sions.
C. Mark, punch, and drill the mounting holes. Care must be taken to avoid damage
to adjacent equipment or cables.
D. Secure the mounting rack firmly in place.
E. Secure the KTR 908 to the mounting rack.

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2.3.3 KTR 908 CABLE HARNESS AND CONNECTOR ASSEMBLY

A. The installing agency will supply and fabricate all external cables. The connectors
and hardware required are supplied in the Bendix/King Installation Kit P/N 050-
01800-0000/0001. FIGURE 2-6 BNC CABLE ASSEMBLY illustrates the specific
aspects of constructing the RF connector and FIGURE 2-7 "SUB-MIN D" CON-
NECTOR ASSEMBLIES illustrates wiring connector housing(s).
B. The length and routing of the external cables must be carefully studied and planned
before attempting actual installation. Avoid sharp bends and placing the cables too
near the aircraft control cables.
C. Use FIGURE 2-2 KTR 908 CONNECTOR J9081 PINOUT DIAGRAM to become
familiar with the pin locations on the plugs for the fabrication of the external cables.
D. Connect the external wiring to the KTR 908 and associated equipment using the
applicable interconnect drawings, see FIGURE 2-11 KTR 908/KFS 598 INTER-
CONNECT, FIGURE 2-12 KTR 908/KFS 598A INTERCONNECT, FIGURE 2-13
KTR 908/KFS 598A TANDEM INTERCONNECT, or FIGURE 2-14 KTR 908/KFS
598A REPEATER INTERCONNECT.
2.3.4 KFS 598/KFS 598A MECHANICAL INSTALLATION
A. Select the KFS 598/KFS 598A location. Insure that the unit will be easily accessi-
ble and clearly visible to the pilot.
B. For mounting dimensions, refer to FIGURE 2-9 KFS 598 INSTALLATION or FIG-
URE 2-10 KFS 598A INSTALLATION. Punch and drill the necessary mounting
holes.
C. Install the control unit.
2.3.5 KFS 598/598A CABLE HARNESS AND CONNECTOR ASSEMBLY
A. The installing agency will supply and fabricate the external cable. The connectors
and hardware required are supplied in Bendix/King Installation Kit P/N 050-01830-
0000/0001 for the KFS 598 and 050-02091-0000/0001 for KFS 598A.
See FIGURE 2-7 "SUB-MIN D" CONNECTOR ASSEMBLIES for the specific as-
pects of constructing the wiring connector housing.
B. The length and routing of the external cables must be carefully studied and planned
before attempting actual installation. Avoid sharp bends and placing the cables too
near the aircraft control cables.
C. See FIGURE 2-3 KFS 598 CONNECTOR J5981 PINOUT DIAGRAM and FIGURE
2-4 KFS 598A CONNECTOR J598A1 PINOUT DIAGRAM to become familiar with
the pin locations on the plugs for the fabrication of the external cables.
D. Connect the external wiring to the KFS 598/KFS 598A and associated equipment
using the applicable interconnect drawings, see FIGURE 2-11 KTR 908/KFS 598
INTERCONNECT, FIGURE 2-12 KTR 908/KFS 598A INTERCONNECT, FIGURE
2-13 KTR 908/KFS 598A TANDEM INTERCONNECT, or FIGURE 2-14 KTR 908/
KFS 598A REPEATER INTERCONNECT.
2.3.6 KFS 598A CONTROL PIN FUNCTIONS
2.3.6.1 Control Disable (P5982-P8)
The front panel and remote controls are nonfunctional when this pin is grounded. The transceiver
remains tuned to the frequency in use prior to disabling.

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2.3.6.2 Remote Channel (P5982-P4)

Grounding this pin places the unit in channel mode and increments the channel number from the
previous channel number used.
2.3.6.3 Program Secure (P5981-P1)
After a channel has been Program Secured, that channel may not be reprogrammed until it has
been Un-program Secured. The process involves grounding and ungrounding Pin 1 of the 29 pin
rear connector.
When Program or Un-program Securing any channels in a tandem installation, the following pro-
cedure must be followed to insure proper operation.
A. Remove either unit from aircraft.
B. Refer to Section V of the KFS 598A Maintenance Manual for Program Secure pro-
cedure.
C. Before replacing the unit in the aircraft, verify that the remaining unit is in FRE-
QUENCY MODE.
D. Reinstall Program Secured unit and apply power.
E. Operating only the newly Program Secured unit, place the units in Program mode
by holding the CHAN button for two seconds. Turn either tuning knob to display all
nine channels. Do not remove power for at least three (3) seconds. The unit that
remained in the aircraft will now be Program Secured, also.
2.3.6.4 Master/Slave (P5982-P3)
Grounding this pin designates the control unit as the Master unit in a tandem installation. An open
pin designates the Slave unit.
2.3.6.5 Automatic Dim Override (P5981-P13)
Grounding this pin disables the automatic display dimmer. Display brightness will go to maximum
intensity.
2.3.6.6 Civil/Military Mode Select (P5982-P7)
Grounding this pin enables Military Mode operation. Opening this pin will allow the control unit to
operate in the Civil Mode.
2.3.6.7 Frequency Management COMM Unit Designation (P5982-P5 and P6)
When one to three communications systems are installed as part of a system with frequency man-
agement capabilities, such as the Bendix/King KNS 660, each control head must be designated
as either COMM1, COMM2, or COMM3.
The COMM unit number designation is set by grounding or leaving open P5982-P5 and P6 in the
proper combination as listed below. The control unit communicates on the frequency manage-
ment data bus using labels which correspond to the unit number designation. When both P5698-
P5 and P6 are left open, the control head is configured for tandem operation.

P5982-P5 P5982-P6 COMM UNIT NUMBER DESIGNATION

GROUND GROUND COMM1
OPEN GROUND COMM2
GROUND OPEN COMM3
OPEN OPEN TANDEM OPERATION

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B KTR 908 / KFS 598/598A

CRIMPING TOOL
HONEYWELL P/N: 005-02012-0021
MIL SPEC P/N: M22520/2-01
POSITRONICS P/N: 9507-000
DANIELS (DMC) P/N: AFM8
ASTRO (BUCHANAN) P/N 612118

POSITIONER
HONEYWELL P/N: 005-02012-0023
POSITRONICS: P/N 9502-11 (18 AWG)
POSITRONICS: P/N 9502-10 (20-32 AWG)
DANIELS (DMC) P/N: K774 (18 AWG)
DANIELS (DMC) P/N: K694 (20-32 AWG)
ASTRO (BUCHANAN) P/N 612513

INSERTION/EXTRACTION TOOL
HONEYWELL P/N: 005-02012-0025
MIL SPEC P/N: M81969/1-02
(SUPERCEDES MIL SPEC P/N: M24308/18-2)
ORDER FROM POSITRONICS, DANIELS, OR ASTRO BY MIL SPEC P/N

Vendor Ordering Information:

Astro Tool Company

21615 SW TV Hwy, Beaverton, OR 97006
(503) 642-9853 * Fax: 503-591-7766 * Email: sales@astrotool.com

Daniels Manufacturing Company (DMC)

526 Thorpe Road, Orlando, FL 32824-8133 USA
Tel: 407-855-6161 * Fax: 407-855-6884 * Email: dmc@dmctools.com

Positronics Industries, Inc.

423 N. Campbell Ave P.O. Box 8247, Springfield, MO 65801
Tel: 800-641-4054 * Fax: 417-866-4115 * Email: info@connectpositronics.com

FIGURE 2-1 CRIMPING AND INSERTION/EXTRACTION TOOLS

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B KTR 908 / KFS 598/598A

PIN I/O SIGNAL NAME

1 I SQUELCH TEST
2 I ATE SQ TEST OR COMP TEST
3 I MIC KEY
4 I PTT
5 I VOLUME CONTROL
6 I MIC AUDIO
7 POLARIZING PIN
8 I +27.5 VDC A/C POWER INPUT
9 O -26VDC OUTPUT
10 O +10VDC OUTPUT
11 O DETECTOR OUT
12 NOT CONNECTED
13 O +185VDC OUTPUT
14 I DATA STROBE
15 I CLOCK BUS
16 I DATA BUS
17 I IF AGC
18 I RF AGC
19 O AUDIO LO OUTPUT
20 O AUDIO HI OUTPUT
21 I +27.5VDC A/C POWER INPUT
22 GROUND
23 A/C GROUND
24 A/C GROUND
25 I ON/OFF CONTROL
FIGURE 2-2 KTR 908 CONNECTOR J9081 PINOUT DIAGRAM

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B KTR 908 / KFS 598/598A

PIN I/O SIGNAL NAME

1 N/C
2 I REMOTE TRANSFER SWITCH
3 I PTT
4 O SERIAL DATA CLOCK
5 O SERIAL DATA
6 O COMM STROBE
7 I -26VDC INPUT
8 I +10VDC INPUT
9 I +10VDC INPUT
10 I +185VDC INPUT
11 N/C
12 N/C
13 N/C
14 N/C
15 N/C
16 N/C
17 I 27V PANEL LIGHTING
18 I 5V PANEL LIGHTING
19 PANEL LIGHT GROUND
20 N/C
21 N/C
22 N/C
23 POLARIZING PIN
24 N/C
25 O SQUELCH TEST
26 SIGNAL REFERENCE GROUND
27 SIGNAL REFERENCE GROUND
28 O ON/RESET
29 O REMOTE VOLUME CONTROL
FIGURE 2-3 KFS 598 CONNECTOR J5981 PINOUT DIAGRAM

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PIN I/O SIGNAL NAME

1 I PROGRAM SECURE
2 I REMOTE TRANSFER SWITCH
3 I PTT
4 O SERIAL DATA CLOCK
5 O SERIAL DATA
6 O COMM STROBE
7 I -26VDC INPUT
8 I +10VDC INPUT
9 I +10VDC INPUT
10 I +185VDC INPUT
11 I AUDIO HI INPUT
12 N/C
13 N.C
14 N/C
15 O MIC KEY OUTPUT
16 O AUDIO HI OUTPUT
17 N.C
18 N.C
19 N.C
20 I AUDIO LO INPUT
21 I MIC KEY INPUT
22 O AUDIO LO OUTPUT
23 POLARIZING PIN
24 N/C
25 O SQUELCH TEST
26 SIGNAL REFERENCE GROUND
27 SIGNAL REFERENCE GROUND
28 O ON/RESET
29 O REMOTE VOLUME CONTROL
FIGURE 2-4 KFS 598A CONNECTOR J598A1 PINOUT DIAGRAM

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PIN I/O SIGNAL NAME

1 I 429 DATA BUS LINE A
2 I 429 DATA BUS LINE B
3 I MASTER/SLAVE
4 I REMOTE CHANNEL COMM
5 I COMM UNIT 2
6 I COMM UNIT 1
7 I CIVIL/MILITARY
8 I CONTROL DISABLE
9 POLARIZING PIN
FIGURE 2-5 KFS 598A CONNECTOR J598A2 PINOUT DIAGRAM

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B KTR 908 / KFS 598/598A

FIGURE 2-6 BNC CABLE ASSEMBLY

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THIS PAGE IS RESERVED

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2.4 POST INSTALLATION CHECK

A flight test is recommended after the installation is completed to insure satisfactory performance
of the equipment in its normal environment. Check all aircraft control movements to be sure no
electrical cables interfere with their operation.
To check the communications transceiver, maintain an appropriate altitude and contact a ground
station facility at a range of at least fifty nautical miles. Contact a ground station close in. Pull the
volume control knob out to defeat the automatic squelch feature and listen for any unusual elec-
trical noise which would reduce the COMM receiver sensitivity by increasing the squelch thresh-
old.
If possible, verify the communications capability on both the high and low end of the VHF COMM
band.

CAUTION:
AS AN ADDED PRECAUTION BEFORE THE
FLIGHT, CHECK THE ANTENNA. VSWR
SHOULD BE CHECKED WITH AN IN-LINE
TYPE WATTMETER INSERTED IN THE CO-
AXIAL TRANSMISSION LINE BETWEEN THE
TRANSCEIVER AND THE ANTENNA. ANY
PROBLEM WITH THE ANTENNA INSTALLA-
TION WILL MOST LIKELY BE SEEN AS A
HIGH REFLECTED POWER. A VSWR OF 3:1
WILL RESULT IN A 25% LOSS IN POWER.
2.4.1 KFS 598A VERIFICATION TEST
A. Verify that turning on the unit (or either unit in a tandem installation) causes the dis-
play(s) to light, and that the volume control changes the audio level(s).
B. Verify that pressing the PUSH TST button will alternate the radio between
squelched and unsquelched states.
C. Vary ambient light on display by placing a finger over the photocell and verify that
display darkens.
D. Depress and hold Transfer button for longer than 2 seconds. The Standby fre-
quency will blank and the tuning knobs will then tune the Active frequency.
E. Press the CHAN button and verify that the unit(s) enter the Channel mode and dis-
play CH and the channel number and frequency.
F. Press the CHAN button and verify that the unit(s) enter the Channel mode and dis-
play CH, the channel number, and the frequency. The tuning knobs will increment
or decrement the channel number only to channels with a programmed frequency.
If none are programmed, the unit(s) will default to Channel 1 and display dashes in
the SBY window for approximately 5 seconds after which the control head reverts
to Frequency mode.
G. Press the CHAN button and hold for longer than 2 seconds. Verify that unit(s) enter
the Program mode and display a P and a flashing channel number.
NOTE:
An unprogrammed channel will display dashes in the
SBY window.

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B KTR 908 / KFS 598/598A

The tuning knobs will change the channel number to 1 thru 9. Press the Transfer
button momentarily and verify that the channel number stops flashing and the fre-
quency flashes. The tuning knobs will increment or decrement the channel fre-
quency.
Pressing the Transfer button again will cause the frequency to stop flashing if it is
valid and the channel number to flash again.
Pressing the CHAN button will return the control unit(s) to the mode from which
Program Mode was entered if the CIVIL/MIL pin on the rear connector is grounded
(MIL Mode). If the CIVIL/MIL pin on the rear connector is left open (CIVIL Mode),
the control head will always return to Frequency Mode.
NOTE:
If no action is taken for 20 seconds while in program
mode, the unit(s) will return to their previous mode.

H. Verify that when turning the unit(s) on while the Transfer button is depressed that
the unit comes up in Active Entry and displays 120.00 MHz.

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B KTR 908 / KFS 598/598A

FIGURE 2-7 "SUB-MIN D" CONNECTOR ASSEMBLIES

(Dwg. No. 155-05389-0000, R-5)

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B KTR 908 / KFS 598/598A

FIGURE 2-8 KTR 908 INSTALLATION

(Dwg No 155-05360-0000, R-0)

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B KTR 908 / KFS 598/598A

FIGURE 2-9 KFS 598 INSTALLATION

(Dwg No 155-05361-0000, R-3)

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B KTR 908 / KFS 598/598A

FIGURE 2-10 KFS 598A INSTALLATION

(Dwg No 155-05563-0000, R-2)

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B KTR 908 / KFS 598/598A

FIGURE 2-11 KTR 908/KFS 598 INTERCONNECT

(Dwg No 155-01372-0000, R-6)

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B KTR 908 / KFS 598/598A

FIGURE 2-12 KTR 908/KFS 598A INTERCONNECT

(Dwg No 155-01454-0000, R-7)

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B KTR 908 / KFS 598/598A

FIGURE 2-13 KTR 908/KFS 598A TANDEM INTERCONNECT

(Dwg No 155-01453-0000, R-AA)

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B KTR 908 / KFS 598/598A

FIGURE 2-14 KTR 908/KFS 598A REPEATER INTERCONNECT

(Dwg No 155-01536-0000, R-AA, Sheet 1 of 2)

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B KTR 908 / KFS 598/598A

FIGURE 2-14 KTR 908/KFS 598A REPEATER INTERCONNECT

(Dwg No 155-01536-0000, R-AA, Sheet 2 of 2)

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SECTION III
OPERATION
3.1 GENERAL
3.1.1 KFS 598 OPERATING PROCEDURES
Rotate the VOL control knob clockwise from the OFF position. To override the automatic squelch
pull the VOL knob out and rotate the VOL control for desired listening level on the noise being pro-
duced by the receiver.
Push the VOL knob back in to activate the automatic squelch.
Select the desired operating frequency in the Standby display by rotating the increment/decre-
ment knobs either clockwise or counterclockwise. A clockwise rotation will increment the frequen-
cy while a counterclockwise rotation will decrement the frequency.
The larger knob will change the MHz portion of the standby display. At one band-edge (118 MHz
or 135.975 MHz [expanded versions 136.975 MHz or 151.975 MHz]) the following 1 MHz change
will wrap around to the other band edge.
The outside knob will change the kHz portion of the standby display. It will change in steps of 50
kHz when the knob is pushed in and 25 kHz when the knob is pulled out. The wrap around band
edge is also utilized when incrementing or decrementing the kHz portion of the standby display.
To tune the radio to the desired operating frequency, the frequency must first be entered into the
Standby display, and then the transfer button must be pushed. This will trade the contents of the
Active and Standby display.
The transceiver is always tuned to the frequency appearing in the Active display. It is therefore
possible to have two different frequencies available, one in use and one stored in the Standby dis-
play.
During the transmit operation, a TX will appear between the Active and the Standby displays, sig-
nifying that the transceiver is in the Transmit mode of operation.

FIGURE 3-1 KFS 598 CONTROL FUNCTIONS

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3.1.2 KFS 598A OPERATING PROCEDURES

Rotate the VOL control knob clockwise from the OFF position. A momentary unsquelched state
will occur. To override the automatic squelch state, push the PUSH TST knob. To return to the
squelched state push the PUSH TST knob once again.
When the mic is keyed, the TX annunciator will light just right of the active display. If the mic key
is held down for more than 1-1/2 minutes, the key line to the KTR 908 will be disabled. The total
display will then flash as long as the mic key is depressed.

FIGURE 3-2 KFS 598A CONTROL FUNCTIONS

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3.1.3 FREQUENCY MODE

3.1.3.1 Standby Entry
Frequency selection is accomplished in the Standby Entry mode by changing the frequency dis-
played in the Standby window of the display with the tuning knobs, and then transferring the se-
lected frequency into the Active window by pressing the Transfer button.
The larger tuning knob will increment or decrement the MHz portion of the display in 1 MHz steps
with rollover at each band edge (118 MHz on the low end and either 135, 136, or 151 MHz on the
high end).
The smaller tuning knob will increment or decrement the kHz portion of the display in 50 kHz steps
with the knob pushed in or in 25 kHz steps with the knob pulled out. Rollover to the opposite band
edge occurs at 000 and 975 kHz.
While in the Standby Entry mode, the transceiver remains tuned to the frequency displayed in the
Active window at all times.
3.1.3.2 Active Entry
The Active Entry mode is entered from Standby Entry Frequency mode or Channel mode by push-
ing the Transfer button for longer than 2 seconds. The tuning knobs operate as in Standby Entry,
but will change the Active frequency, rather than the Standby frequency. The radio will be tuned
to the Active frequency.
Momentarily pushing the Transfer button returns the control head to Standby Entry. The Standby
frequency prior to Active Entry mode remains unchanged.
3.1.4 CIVIL OPERATION (J5982-P7 open)
3.1.4.1 Channel Mode

A. Momentarily pressing the CHAN button while in Frequency mode puts the unit in
Channel mode. The unit remains tuned to the last active frequency displayed before
entering Channel mode.

The last used channel number is displayed unless no channels have been pro-
grammed, in which case the unit defaults to Channel 1 and dashes are displayed in
the Standby window.

Turning either tuning knob changes the channel number and corresponding fre-
quency. The channels will only increment and decrement to channels that have
been programmed.

If there has been no activity for five seconds the unit will return to Frequency mode
and the channel frequency is placed in the Standby window. Pressing the CHAN
button before the 5 second delay is completed will return the unit to Frequency mode
and the status of Frequency mode prior to entering Channel mode remains the
same.

B. When in Channel mode, pressing the Transfer button will return the unit to Frequen-
cy mode. The channel frequency will become the new Active frequency and the last
Active frequency will become the new Standby frequency.

If the unit was in Active Entry mode prior to entering Channel mode, pressing the
Transfer button or allowing the unit to time out will bring it back to Standby Entry.

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3.1.4.2 Program Mode

A. Program mode is selected by pressing and holding the CHAN button for longer than
two seconds. The unit tunes the KTR 908 to last active frequency displayed before
entering Program mode and the last used Channel number is displayed when Pro-
gram mode is entered.

The Channel number flashes and turning either tuning knob changes the Channel
number. When the Channel number is flashing, pressing the Transfer button will
cause the Channel number to stop flashing and cause the frequency to flash, unless
the channel is Program Secured.

The tuning knobs then work as in Frequency mode, except between rollover points
118.XX to 135.XX/136.XX and 135.XX/136.XX to 118.XX, or 118.XX to 151.XX and
151.XX to 118.XX for extended frequency range, dashes are displayed to unpro-
gram the channel.

When the frequency is flashing, pressing the Transfer button will cause the frequen-
cy to stop flashing and the Channel number to flash.

B. If no activity has occurred for 20 seconds the unit returns to Frequency mode. The
unit can also be returned to Frequency mode from Program mode by pressing the
CHAN button.

Returning to Frequency mode will not change the Active or Standby frequencies
from what they were prior to entering Program mode.

3.1.5 MILITARY OPERATION (J5982-P7 grounded)

3.1.5.1 Channel Mode

A. Pressing the CHAN button momentarily while in one of the Frequency modes puts
the unit in Channel mode. The last channel used is the Channel number displayed.
The unit tunes the KTR 908 to the frequency in the Standby window.

If no channels are programmed, the unit will display CH 1 and dashes in the Standby
window for five seconds, and will tune the KTR 908 to the last Active frequency.

Either tuning knob will change the Channel number and the corresponding channel
frequency. The unit will only channel to channel numbers with a frequency pro-
grammed.

Holding the Transfer button for two seconds selects the Active Entry mode.

NOTE:
The channel mode does not time out as in civil oper-
ation.

B. Pressing the CHAN button momentarily will return the unit to Frequency mode and
the status remains what it was prior to entering Channel mode.

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3.1.5.2 Program Mode

A. Pressing and holding the CHAN button for longer than 2 seconds brings the unit into
Program mode. The last used channel number is displayed and flashes. The trans-
ceiver tunes the frequency in the Standby window.

When the channel number is flashing, the tuning knobs will change the channel
number. An unprogrammed channel will display dashes in the Standby window, in
which case the transceiver will tune the last valid Active frequency.

B. Pressing the Transfer button causes the channel number to stop flashing and the
frequency to flash. The tuning knobs will then operate as in the frequency mode.

Pressing the Transfer button will again cause the Channel number to flash and the
frequency to stop flashing.

C. In frequency rollover or rollunder, dashes will be displayed before rolling to the low-
est or highest frequency respectively. Leaving dashes in the display unprograms
the channel when leaving Program mode.

D. The unit returns to Frequency mode by momentarily pressing the CHAN button or if
no activity has occurred for 20 seconds. The Frequency mode status prior to Chan-
nel or Program mode is resumed. The transceiver will be tuned to the frequency in
the Active display.

3.1.6 DEFAULT MODE

Turning the units on while holding the Transfer button down will bring the unit on in Active Entry
and load 120.00 MHz as the Active frequency.
3.1.7 REMOTE TRANSFER
Operates identically as front panel Transfer button with the exception that holding the Remote
Transfer button for two seconds does not place unit in Active Entry.
3.1.8 REMOTE CHANNEL
Pressing the Remote Channel button will cause the system to enter the Channel mode of opera-
tion and will increment the channel from the previous channel number used.

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THIS PAGE IS RESERVED

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