User's Manual

Weehawken Tunnel VHF Repeater System
User/Maintenance Handbook
Handbook N.-Weehawken_VHF Issue No:-A Date:-05/08/05
Page:-
29 of 75
5. VHF SPLITTERS/COMBINERS
5.1 VHF Downlink Crystal Splitter (80-230801)
5.1.1 VHF Downlink Crystal Splitter Description
The crystal splitter shelf is used in the downlink path to isolate the VHF channel frequencies
at the inputs to the cell enhancers which amplify them. These frequencies are initially
processed by bandpass filters which eliminate spurious frequencies prior to being passed by
the crystal filters which have a much narrower bandwidth than the filters before
amplification by their respective channel selective modules.
Being passive shelves, no alarms are present.
5.1.2 VHF Downlink Crystal Splitter Technical Specification
PARAMETER SPECIFICATION
153.75-155.30MHz (D/L)
Frequency ranges:
159.0-161.0MHz (D/L)
VSWR: better than 1.5:1
Insertion loss: <1.5dB
Rejection: >30dB
RF Connectors: N type, female
operational:
-10°C to +55°C
Temperature
range:
storage:
-40°C to +70°C
Case: Alocrom 1200
Heatsinks: Matt black
Handles: Silver anodised alloy
Finish:
Fascia Painted to RAL 7035
Alarms Fitted: None