User's Manual

Operation GMH Series VHF Radio
Page 3-4 BK RADIO
PA Public Address
Press the PA button to turn the Public Address system on or off. When PA is on, pressing the
microphone PTT switch causes audio to be routed to the audio amplifier without enabling the
transmitter.
HOM Home Channel
Press the HOM button to go to the pre-programmed Home Channel.
To set a different Home Channel, select the desired channel using the Channel Select knob,
press the HOM button, and hold it for more than 1 second until the arrow above the HOM
button appears on the display. The new channel then becomes the Home Channel.
TA Repeater Talk Around
Press the TA button to turn Repeater Talk Around on or off. When TA is on, the radio
transmits on the receive frequency of the selected channel, bypassing or “talking around” the
repeater. This function may be used on any channel that is programmed to a frequency pair
(repeater channel).
CG Code Guard Disable
Press the CG button to disable or enable Code Guard operation. An arrow on the display
points to the CG button when Code Guard is disabled. When Code Guard is enabled, a
message is heard only when the proper Code Guard is received. Transmit Code Guard
generation is unaffected. The CG button may also be used to override Busy Channel
Lockout, if that is installed.
GRP Channel Group
Press the GRP button to toggle between Group Select and Channel Select modes. This is
used only if the radio has been programmed to divide the available channels into groups.
Press the GRP button for Group Select mode. Turn the Channel Select knob to select a
group. Return to Channel Select mode by waiting 5 seconds, or by pressing the GRP button
one time (numeric mode) or two times (alphanumeric mode). After selecting a group in
alphanumeric mode, press the GRP button one time to display the group label, and a second
time to return to Channel Select mode.
SPK External Speaker
Press the SPK button to toggle between the built-in radio speaker and an external speaker.
NXT Next Scan Channel
Press the NXT button to select the next consecutive channel in the scan list (not during scan
operation).
LPW Low Power Select
Press the LPW button to toggle between high power and low power transmitter operation.
Transmitter power settings can be programmed from 15 to 50 watts.