User's Manual

2-6
A standard 9 pin serial cable must be temporarily connected between the front panel DB-9
connector on the transceiver and the computer serial port.
The transceiver is capable of 25 kHz spacing (wide band) and 8.33 kHz spacing (narrow
band) channels. The frequency entered will determine whether the channel will be wide or
narrow mode, based on the Combined 8.33 kHz/25 kHz ICAO Frequency-Channel Pairing
Plan. For example if you program 118.000 into a memory, the transceiver will operate on
118.000 MHz in wide band mode. If you program 118.005 into a memory, the transceiver
will operate on 118.000 MHz in narrow band mode. For the most part, this will be
transparent to the user since a frequency will be issued in the ICAO format and the radio
will select wide or narrow mode. Refer to the chart below.
TABLE 2-1 COMBINED 8.33/25 kHz ICAO FREQUENCY CHANNEL PAIRING PLAN
Frequency Entered (MHz) Actual Operating Frequency Channel Spacing (kHz)
118.000 118.0000 25
118.005 118.0000 8.33
118.010 118.0083 8.33
118.015 118.0166 8.33
118.025 118.0250 25
118.030 118.0250 8.33
118.035 118.0333 8.33
118.040 118.0416 8.33
118.050 118.0500 25
118.055 118.0500 8.33
118.060 118.0583 8.33
118.065 118.0666 8.33
118.075 118.0750 25
118.080 118.0750 8.33
118.085 118.0833 8.33
118.090 118.0916 8.33
118.100 118.1000 25
118.105 118.1000 8.33
etc etc etc