User Manual

5 Ch. VHF Radio Repeater Equipment
Document Number 50-189201HBK – Issue 1 Page 27 of 48
4.7. BDA VHF DOWNLINK INPUT SPLITTER (50-189207)
Downlink Input Splitter (50-189207) shelf receives Downlink VHF signals from the off-air RX antenna,
the signal is split into three paths and each path is then pased through a Bandpass Notch Filter. The
outputs of two of the filters are then further divided to produce the five required channels. Each
channel then passes through a Crystal Filter before leaving the Input Splitter shelf and going to a
dedicated Channelised Amplifier.
4.7.1. BDA VHF Downlink Input Splitter (50-189207) Major Components
Component
Part
Component Part Description Qty Per
Assembly
01-003105 Bandpass Notch Filter 3
19-000922K 3U Rack Mount Chassis 1
93-980222 Crystal Filter 154.070MHz 1
93-980223 Crystal Filter 154.190MHz 1
93-980226 Crystal Filter 155.700MHz 1
93-980230 Crystal Filter 158.850MHz 1
93-980231 Crystal Filter 158.910MHz 1
Top View – lid removed
Close-up of connectors
A Input from RX Antenna
B Port A4 U/L Channel 4 output
C Port A2 U/L Channel 2 output
D Port A5 U/L Channel 5 output
E Port A3 U/L Channel 3 output
F Port A1 U/L Channel 1 output