User's Manual

Operation GMH Series VHF Radio

Page 3-2

BK RADIO

3.2.2 Transmit

RESS THE

PTT

(Push To Talk) switch on the microphone. The TX annunciator

appears on the display and the red Transmit indicator glows while the PTT is

pressed. Talk in a normal voice with the microphone approximately one to two

inches from your mouth. Release the PTT switch to stop transmitting.

If the TX annunciator does not appear and a tone is heard, you are on a

receive-only channel or the channel is busy (if Busy Channel Lockout is

enabled). Turn the Channel Select knob to an authorized transmit channel or

wait until the channel is clear (if Busy Channel Lockout is installed).

If the length of the message exceeds the preset time-out timer setting, the

transmitter automatically shuts off and a tone sounds. To continue the

transmission, release the PTT switch, and then press it again and continue

talking.

3.2 CODE GUARD OPERATION

Code Guard

allows one radio or group of radios to be selectively called within a system. If the radio

has been programmed with Code Guard, use the following receive and transmit instructions.

3.2.1 Code Guard Receive

URN POWER ON

by turning the Volume knob clockwise past the OFF detent.

The radio will beep, indicating that it has passed its self test and is operational.

ET VOLUME

by pressing the MON button to hear squelch noise. Turn the

Volume knob to set a comfortable volume level. Press the MON button again to

stop squelch noise.

ELECT A CHANNEL GROUP

(if applicable) by pressing the GRP button and

turning the Channel Select knob. Press the GRP button again to return to

channel select mode. See “GRP” on page 3-5.

ELECT A CHANNEL

by turning the Channel Selector knob. After reaching the

highest number, the radio wraps to channel 1.

RESS THE

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.