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SECTION 6
OPTIONS
DEFAULT CHANNELS
The first control channel is the channel the COM-120C uses on entry to all the test
screens. The second control channel is used by the automatic test mode for the MOVE
test.
The Radio Unit only goes into service on a channel that is contained within the
programmed hunt sequence. See notes on following pages for discussion of UK Band III
DTI numbering scheme.
BASE FREQUENCIES
These are the base Rx and Tx frequencies from which the channel spacing is used as
an offset to calculate the frequencies for each channel.
The base frequencies are effectively those of logical channel 0.
CHANNEL SPACING
The normal values for this parameter are either 12.5 kHz (default) or 25 kHz. If it is set
to zero, editing of the channel-frequency allocation plan fields is enabled, otherwise
editing is disabled. Other values of channel spacing can be entered as required.
FFSK MODULATION
The FFSK modulation level is used to determine the deviation applied to the data
generator for FFSK modulation.
Usual values are 1.5 kHz for 12.5 kHz channel spacing, 2.5 kHz for 25 kHz channel
spacing.
CHANNEL PLAN
Some networks do not use a fixed channel spacing frequency plan. In order to create
such a network definition, set the channel spacing field to zero. Now it is possible to
individually edit the Rx and Tx frequencies for each channel.
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General