Tram BTS - Motorola
Tram BTS - Motorola
Tram BTS - Motorola
Antenna
RF interface to Antenna
( Transmit - Combining and filtering)
Main Functional areas:
(Receive – Amplification and filtering)
1. Digital Cards
2. Radios (CTU2)
3. RF equipment CTU2 CTU2 CTU2 CTU2 CTU2 CTU2
Site
Controller
(HIISC)
Circuit
Breaker
Card
(CBC)
Power
Supply
CTU2
Units Cooling
(PSU) Fans
SURF2
HORIZON II macro Cabinet Top View
Site I/O
Power Panel
Supply
Link
Interface
Board
1x Tx RF Blocks
1x FAN trays
H11SC
Front Panel
•States LEDs –
GREEN (normal
Status Compact •Compact
operation) RED LEDs Flash Slot Flash Card slot
(Fault). – contains
32Mb of
memory.
•TTY MMI –
Reset Buttons connection for 9
CPU – is a Soft Reset pin D type
Reset (Reset TTY
Buttons connector.
Controllers MMI
Main •CAL PORT –
Processors. Calibrates the
Software NIU Sync Block. The
remains in Ethernet CAL 8K Reference is
RAM). Port Port used in GCLK
FULL – is a calibration.
Hard reset. •The NIU
Removes Ethernet and
software from Synch/NIU SYNC/NIU TTY
memory. Port are for
TTY PORT
factory use
only.
HIISC Functional Diagram Site Controller Card
NIU Block
Control via NIU
NIU Port 0, TS 0
Control
Processor NIU Port 0
& Port 1
2
8
24?
Frequency
Control Interface Radio(s)
Reference
Internal 2048 kbps
TDM interface with
32 timeslots.
External E1 or T1
interface.
Internal E1 or T1
interface.
Horizon II macro HSCII Block diagram
Uplink RSL
Insertion
16Kbs only SMuRF
E1 Inputs Sync, Mux, uBCU,
x 6 Current Replacement, FPGA
x 8 Future
LAPD
Encode/Decode
Layer 2 processing
CTU2
dual carrier unit
single/dual carrier
operation
single frequency band BTP function of the BTS
runs site software and
call processing functions
Second H2SC
configured for
redundancy
Three on board
XMUX functions Field Programmable Gate Array
FMUX equivalent (FPGA)
similar function as the ASIC
64Kb switch
incapable of sub-rate switching
Cabinet Expansion
• The Cabinet can be expanded up to 3x
Horizon II macro Cabinets
• Can be expanded with Horizonmacro and
Mcell6 cabinet combinations.
• Expansion Kit – 1x XMUX card
1x Input/Output (I/O) card
1x 2m Fibre Optic cable
Cabinet Components – Inter connections
Horizon II
Cabinet
CTUII radio(s)
H-II Radio
H-II Expansion
TDM Cabinet
Alarm XMUX
Site IO XMUX
HIISC
NBSC Site IO
Horizonmacro
Cabinet
FMUX
FMUX
Alarm
Holdup Unit (AC Supply only)
Cabinet Temperature Control
XMUX
in slot 0
XMUX Functional Diagram
Input/Output (I/O) card
Fibre
connections
IN/OUT
Expansion configurations
E1
Horizon II X Horizon II
macro (6xCTU2) M macro (6xCTU2)
U
X
E1
E1
Fan 1 & 2
Compact Transceiver Unit
(CTU2)
CTU2
Compact Transceiver Unit ( CTU2)
Single Density Mode – High Power 63W (48dbm) 900MHz
50W (47dbm)
1800MHz
Normal Power 20W (43dbm)
900MHz
16W (42dbm)
1800MHz
EGSM900
• -110.5 dBm, static channel
• -107.5 dBm, faded channel
•
DCS1800
• -111.5 dBm, static channel
• -108.5 dBm, faded channel
•
Compact Transceiver Unit 2 (CTU2)
TRANSMIT
RF OUT
TEST
INTERFACE
TTY
INTERFACE
Radio VCAT
Status INTERFACE
LED
Tx Tx
Status A Status B
LED LED
CTU2 to SURF2 interconnection
PA Mode Switches
PA Temp.
2nd Temp.
Branch B VVA
PA Branch 2 Fwd Power Detect B
RF Equipment
RF Equipment
Sectorized Universal Receiver Front end (SURF2)
SURF2 Functional diagram
Expansion
VSWR Monitoring
Antenna
To SURF
VSWR
Monitor
Rx Filter
Tx Filter
Signal
Cabinet TX Blocks
Transmitter RF Blocks
New RF Blocks:
• DUP - Duplexer
• HCU - Hybrid Combiner Unit
• DHU - Dual Hybrid Combiner Unit
Connecting Panels
• Blanking Plate
• Feedthrough plate
Transmitter Blocks
Blanking Plate
HCU
•Used to connect 2x
CTU2 via a Hybrid
•Typical 3-4db loss
HCU- Block diagram
Typical 6 db loss
Dual Hybrid Combiner Unit - DHU
6dbs typical
loss
Software and Database Requirements