Service manual

Operation GPH Series VHF Radio

Page 3-10 

NOTE:

If the radio is programmed for Dual Priority operation, only Priority

Channel 1 can be changed with the keypad.

NOTE:

A channel can be the priority channel even if it is on the scan list. Due to

multiple sampling of the same channel, however, maximum performance

occurs when the priority channel is not on the scan list.

3.5 USER SELECTED CODE GUARD

When the radio is being programmed with transmit and receive frequencies for each channel, a

receive Code Guard value and a transmit Code Guard value can also be assigned to each channel.

If User Code Guard selection is enabled, the Code Guard values for any channel can be copied to

another channel in the radio. If your channel selector does not have the same group assigned to each

position, the user-selected guard from the knob-selected group will be linked with the knob-selected

channel.

For example, to use the Code Guard values of Channel 9 with the frequencies of

Channel 5:

1. Turn Scan and Priority Scan OFF.

2. Turn the channel selector knob to Channel 5.

3. Press the 9 key on the keypad. The display shows

The radio will now operate on the frequencies of Channel 5 with Channel 9

Code Guard values. The display shows the Code Guard channel (9), and

then the selected channel (5).

4. Press the

] key to display the Code Guard channel briefly. The display

shows the group number, followed by the Code Guard channel, and then the

selected channel.

5. Press the

] key to reset all values to the original programming, or press

different number keys (1-16) to select a different set of Code Guard Values.

NOTE:

During scan or priority scan, the display does not show user-selected

Code Guard values, nor does it access user-selected Code Guard

values in scan mode.

3.6 GROUP SCAN

Channels on each "channel scan list" and groups on the "group scan list" are scanned sequentially. The

knob-selected group is always scanned when group scan is enabled, even if that group is not on the

group scan list.

When group scan is enabled, the following features are disabled:

 Dual Priority Scan

 User-Selected Code Guard

 Nuisance Channel Delete