User's Manual

Weehawken Tunnel VHF Repeater System
User/Maintenance Handbook
Handbook N.-Weehawken_VHF Issue No:-A Date:-05/08/05
Page:-
59 of 75
7.11 D.I.P Channel Control Module (17-002101)
7.11.1 Description
The operating frequency for each channel in each repeater is programmed by 16 DIL (Dual
In Line) switches. The programming switches are mounted in the Channel Control Module.
The Channel Selectivity Modules are connected to the Channel Control Module via multi-
way ribbon cables.
Adjacent to the DIL switches for each channel is a toggle switch to turn on and off individual
channels as required. A green LED indicates the power status of each channel.
A red LED shows the alarm condition for each channel. An illuminated alarm LED indicates
that the synthesiser has not achieved phase lock and that the module is disabled. There is a
problem which requires investigation, often a frequency programmed outside the operating
frequency range.
The following information is necessary before attempting the programming procedure.
1) operating frequency
2) synthesiser channel spacing (step size)
3) synthesiser offset (IF)