User Manual

5 Ch. VHF Radio Repeater Equipment

Document Number 50-189201HBK – Issue 1 Page 32 of 48

5. BDA VHF SYSTEM RACK 2 (50-189213)

Rack 2, the Downlink cavity combiner takes the three signals from Downlink Output Combiner (50-

189208) and passes each of them through a cavity filter stage, the combined D/L channels 1 & 2 are

passed through a chain of three cavitiy filters, D/L channel 4 and the combined D/L channels 3 & 5

are each passed through a chain of two cavity filters. The three signal paths are then combined by

means of a critical length harness into a single signal path which is fed into the Hybrid

Splitter/Combiner Tray (50-189211) where a Hybrid Splitter splits the signal into two paths, one each

for the two LCX feeds.

Rack 2 is a 43U equipment mounting rack (600mm x 600mm) and comprised of the following

modules, listed from the top of the rack

Component

Part

Component Part Description Qty Per

Assembly

50-189211 Hybrid Splitter/Combiner Tray 1

04-000213 VHF Cavity Resonator 7