User Manual

5 Ch. VHF Radio Repeater Equipment
Document Number 50-189201HBK – Issue 1 Page 15 of 48
4.4. BDA VHF Uplink Input Splitter (50-189210)
BDA VHF Uplink Input Splitter (50-189210) takes the three signal path inputs from the first stage
uplink cavity filter in rack 2 and splits two of the signals to produce five signal paths which are then
fed to the crystal filters.
The outputs from the five crystal filters then leave the Uplink Input Splitter shelf to go to the uplink
sections of the Channelised Amplifier shelves.
This is a passive shelf and has no connection to the PSU and no alarms,
4.4.1. BDA VHF Uplink Input Splitter (50-189210) Major Components
Component
Part
Component Part Description Qty Per
Assembly
19-000822K 2U Rack Mount Chassis 1
93-980196 Crystal Filter 154.785MHz 1
93-980225 Crystal Filter 154.830MHz 1
93-980227 Crystal Filter 155.325MHz 1
93-980228 Crystal Filter 156.150MHz 1
93-980229 Crystal Filter 156.195MHz 1
Top View – lid removed
Close-up
of connectors
A Port G3 Input from cavity combiner
B Port G1 Input from cavity combiner
C Port C4 U/L Channel 4 output
D Port C2 U/L Channel 2 output
E Port G1 Input from cavity combiner
F Port C5 U/L Channel 5 output
G Port C3 U/L Channel 3 output
H Port C1 U/L Channel 1 output