User's Manual

Weehawken Tunnel 900MHz Pager System
User/Maintenance Handbook
Handbook N.-Weehawken_900 Issue No:-A
Date:-05/08/05
Page:-
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2. OVERVIEW/ SYSTEM DESCRIPTION
2.1 General System Description
The Weehawken tunnel radio system is designed to amplify various bands of radio frequencies,
in either channelised or band selective modes. All the hardware is built into standard 19” rack
mounted cabinets which have an environmental IP rating of 54. There is also a single, free
standing wall mounted amplifier which carries the whole signal network to the River Portal
area.
The system in this document will be described separately, as individual shelves (900MHz
Pager) and the various passive combiners, splitters and cross-band coupler shelves will also be
described in separate documents. Every active module in the entire system has a dedicated
alarm and these are series wired within the shelves to a relay which gives a volt-free output pair
for each shelf which is wired to a ‘krone-block’ termination in the rack cabinet.