User's Manual

M7X and M7R Page 3-29 Operation
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Restricting the Radio’s Frequency Range
M7 radios operate between 100 and 399.975 MHz. If required, the frequency range can be restricted by
setting up to four pass bands.
Table 3-4 shows example restrictions by using two of the pass bands.
To set the required configuration:
(1) From the Home screen (Fig 3-29) press Key 8 – Radio Config.
Fig 3-29 Home Screen
Table 3-4 Example Pass Bands
Configuration Pass Band 1 Pass Band 2
M7 set so that operation is over the full
frequency range
100.000 MHz 399.975 MHz
Example: M7 set to transmit only those
frequencies in the range 118 to
136.975 MHz
118.000 MHz 136.975 MHz
Example: M7 set to transmit only those
frequencies in the ranges 120 to 125 MHz
and 225 to 245 MHz
120.000 MHz 125.000 MHz 225.000 MHz 245.000 MHz
In addition to four user settable pass bands, the radio’s frequency range can also be restricted by
‘Stop Bands’. For example, to stop transmissions on commercial broadcasting frequencies, a
radio may have a stop band between 100 and 110 MHz.
Stop bands are factory set and cannot be created or changed by a user. Stop bands, if
applicable, are listed below the pass bands (see Fig 3-31).