User's Manual
Operation GMH Series VHF Radio
Page 3-6
BK RADIO
Scan Delay
Scan delay allows the radio to receive a response to a transmission before scanning the
other channels for activity. If you find that your scanner is restarting before message replies
are heard, you can ask your dealer to increase the scan delay time. (0-7.5 seconds)
Keyboard Microphone Operation
If a keyboard microphone is used with the GMH radio, the following features may be enabled.
Not all microphones support these functions. Contact your dealer to determine which
features are available with your microphone and have been enabled in the radio.
Group Selection
Select a channel group by pressing the # key on the keyboard microphone followed by the
number of the desired group. This is used only if the radio has been programmed to divide
the available channels into groups.
DTMF Encode
DTMF Encode (telephone touch tone) is accomplished by pressing and holding the keyboard
microphone PTT switch, and then pressing the 0 - 9 keys for the encoding operation desired.
After the desired numbers have been entered, monitor or transmit as required.
ANI Operation
Automatic Number Identification can be programmed into the GMH radio for use with inter-
connect telephone and other systems requiring users to identify before allowing use of the
system.
User Selected Scan List
Press the ENT button on the keyboard microphone to add the selected channel to the scan
list. The SCN annunciator appears on the display for each channel entered in the scan list.
Press the CLR button on the keyboard microphone to remove (clear) the selected channel
from the scan list. This can be accomplished during Channel Scan operation to remove an
unwanted channel.
User Selected Priority Channel
Press the PRI button on the keyboard microphone to make the current channel the fixed
priority channel. The PR annunciator appears on the display. This occurs in priority scan
modes B, C, and D, but not A. See "Priority Scan" on page 3-11.
USER SELECTED CODE GUARD
When the frequencies are programmed for each channel in the radio, a receive Code Guard value
and a transmit Code Guard value may also be entered for each channel. The Code Guard values for
channels 1-9 can be copied to a another channel in the radio. For example, to use the Code Guard
values of Channel 9 with the frequencies of Channel 5:
1. Tum off the SCN and PRI buttons.
2. Set the Channel Selector knob to Channel 5.
3. Press the 9 key on the keyboard microphone. The CG annunciator appears on the display to
indicate that the Code Guard has been changed from its original programming.
4. Press the 0 key to reset all values to the original settings, or press a different number key to
select a different set of Code Guard values.