User's Manual

Bronx Justice Centre Radio Repeaters
Handbook Number: 80-283501HBKM Page: 13 of 86
4.1.5.1Description
The five (downlink) channels are received from the output ports of the individual bi-directional
amplifier shelves and coupled together through hybrids, except for channel 2 which, being a
substantially higher frequency than the other four, has its own path through a dedicated bandpass
filter at the output of which the other four combined frequencies and channel 2 meet. The single
signal path is then passed through a divider to two equal level downlink output ports, VHF1 & VHF2.
This is a passive shelf and has no connection to the PSU and no alarms
4.1.5.2Technical Specification
PARAMETER SPECIFICATION
Height: 3U
Width: 19" (482.6mm)
Shelf
dimensions:
Depth: <450mm (excluding connectors & handles)
operational: -20°C to +60°C Temperature
range:
storage: -40°C to +70°C
Weight: <10kg
Frequency ranges passed: 153.965 to 154.980 & 158.925MHz
Impedance: 50ȍ
Humidity: 5 – 95% non-condensing
RF Connectors: N type female
Environmental protection: IP44
Case: Iridite NCP coat
Heatsinks: None
Handles: Silver anodised aluminium alloy
Finish
Fascia: Painted to RAL7035
4.1.6.3Parts List
AFL Part # Part Description Qty.
01-003105 SD NOTCH FILT.N 6 SECT.VHF H/B SMA 2
05-000101 TRANSMITTER HYBRID COUPLER (4 PORT) 1
05-000103 TX HYBRID COUPLER 3 PORT (NO HEATSINK) 3
19-000922K 3U CHASSIS KIT (450mm deep) 1
91-030002 N ADAPTOR PANEL FEMALE:FEMALE 8
91-130001 SMA ADAPT 'T' ALL FEMALE 3 GHz 1