User's Manual

Operation GMH Series VHF Radio
BK RADIO Page 3-5
GSC Group Scan
Press the GSC button to enable or disable Group Scan operation. During Group Scan
operation, the following features are disabled: Dual Priority Scan, User Code Guard, and
Nuisance Channel Delete.
Press the GSC button for 1 second or more to toggle the current channel’s group on or off
the group scan list.
SQL Squelch Adjust
Press the SQL button to toggle between Squelch Adjust and Volume Adjust modes.
Press the SQL button for Squelch Adjust mode. Turn the Volume knob to adjust the squelch
setting. Turning the knob counter-clockwise tightens the squelch setting, allowing only
stronger signals to open the squelch and be heard. In the absence of a held channel, the
receiver will be tuned to the main channel. Guard qualification will be disabled during squelch
adjustment.
Return to Volume Adjust mode by waiting 5 seconds, or by pressing the SQL button again.
Pressing the SQL button and holding for more than 1 second sets the squelch to its factory
preset value.
ACC Accessory
Press the ACC button to turn the installed accessory on or off. Up to three ACC buttons may
be installed for different accessories.
3.3.1 Built-In Features
BK Radio GMH radios are based on a microprocessor core that allows extra features and operational
characteristics to be built into the radio. Your dealer will help define the best operational settings for
your system and program them into the radio.
Additional Frequencies
Additional transmit and receive frequencies can be added. If you wish to monitor other local
radio systems that fall anywhere in your band, a frequency with or without Code Guard can
be added to your program.
Time Out Timer
The time out timer limits the duration of calls and guards against accidentally locking on the
transmitter and tying up the radio system. The duration of the time out timer can be changed
by your dealer. (15-225 seconds, or 0 - disabled)
DTMF/ANI
A DTMF/ANI encoding feature is also available. If enabled by your dealer, a sequence of
DTMF tones (similar to the tones used by a standard pushbutton telephone) are transmitted
each time the transmit PTT switch is activated.