Commercial In Confidence
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6.10.2
DESCRIPTION OF CHANNEL DATA MENU FUNCTIONS:
The channel data screen is displayed when "EDIT CHANNEL DATA" is selected from the
main edit menu. Up to 32 channels may be edited in discrete channel selection mode, and up
to 80 in incremental mode. The channel number displayed at the top right of the screen
corresponds to the channels that may be selected by the bcd channel switches in the modem.
The channels can be stepped through one by one using the NEXT and PREVIOUS
CHANNEL options.
6.10.3
RX & TX FREQUENCY
In incremental channel selection mode the frequencies are displayed for information
purposes only and may not be edited, in discrete mode each frequency must be explicitly
entered. For convenience the TX frequency can be made the same as the RX frequency by
hitting the space bar when prompted for an entry.
6.10.5 NEXT/PREVIOUS
CHANNEL
By pressing the Enter key the next or previous channel is displayed.
6.10.6 EDITING
CHANNEL
Press the Enter key and then use the Arrow keys to select the required channel number, then
press the Enter key again to display the channel information.
6.11
CALIBRATE MENU (FACTORY & SERVICE CENTRE OPTION)
Only the Line input level, Line output level, RSSI Test, Input Voltage Test & Temperature
Test options within this menu are available to users, the other functions are for factory
alignment only and have been inhibited.
6.11.1
TEST MAX POWER/MOD BALANCE
This selects the maximum power for TX alignment and modulates the Transmitter with a
50Hz square wave to balance the modulation point.
6.11.2 SET
TX
FREQUENCY
This adjusts the transmitter’s frequency by varying the voltage to the VCTCXO.
It is normally set to the mid point +/-2.5V and the frequency is then set up with
the variable capacitor in the VCTCXO. This enables later electronic adjustment to be carried
out via a PC or over the radio link.
