User's Manual

CSA and PA Boards for Channel Selective CDMA Operation
For channel selective CDMA operation, the cabinet is normally equipped
with two CSA and two PA boards. These are numbered from left to right.
Board position 1 is used for CSA downlink board, position 2 for PA
downlink board, position 3 for CSA uplink board, and position 4 for PA
uplink board (see Figure 5-2 on page 5-5).
If a board is to be removed, the RFI filter at the board connector, the two
coaxial connectors, and the flat conductor cable between the CSA board
and the PA board must be removed prior to the board removal. No heat
compound is used on the heat sink body or on the chassis.
Coaxial connector P101 is the input of the CSA board fed from the LNA.
Coaxial connector P301 is the output of the CSA board. The signal from
this output is fed to the PA board input P4. The PA board output P5 is
fed to the duplex filter of the same signal direction.
Connection
Board #1 from left CSA/DL:
Port Connected to
P101 OUT1 on the LNA/DL low noise amplifier.
P301 P4 on the PA/DL board.
Board #2 from left PA/DL:
Port Connected to
P4 P301 on the CSA/DL board.
P5 HI on the DPX/MS duplex filter.
Board #3 from left CSA/UL:
Port Connected to
P101 OUT1 on the LNA/UL low noise amplifier.
P301 P4 on the PA/UL board.
Board #4 from left PA/UL:
Port Connected to
P4 P301 on the CSA/UL board.
P5 LO on the DPX/BS duplex filter.
Caution
BERYLLIUM OXIDE
The PA Power Amplifier board power transistors contain beryllium oxide
(BeO) that is poisonous. The power transistors are mounted with two
screws as opposed to other transistors. See Chapter 1, Safety.
ALLGON System AB AR Repeaters & OMT32 Hardware – Functional Description
User’s Manual VD202 90/EN Rev. 1A 1999-07 5 - 20