User's Manual

Operation DMH Series VHF Radio
BK RADIO Page 3-9
3. The keypad will be automatically unlocked when Unit-To-Unit Mode is entered by
pressing PTT to respond to a Unit-To-Unit call, when Unit-To-Unit callback is
enabled. The keypad will be re-locked when Unit-To-Unit Mode is exited.
Push button controls are described as follows:
MON Monitor Squelch Noise
Press the [MON] button to start or stop monitoring squelch noise. This allows
you to set a comfortable volume level.
SCN Channel Scan
Press the [SCN] button to start or stop scanning channels in the scan list.
Scan operation occurs only while the radio is not transmitting. To add or
delete the current channel from the Scan List, turn Scan and Priority Scan
off, then press the [SCN] button and hold it down for 1 second or more.
PRI Priority Scan
Press the [PRI] button to start or stop priority scanning. The PR annunciator
and the flashing SCN annunciator appear on the display. To make the
current channel the fixed Priority 1 Channel, turn Scan and Priority Scan off,
then press the [PRI] button and hold it down for 1 second or more.
GRP Group Select
Press the [GRP] button to toggle between Group Select and Channel Select
Modes. This is used only if the radio has more than one channel group.
Press the [GRP] button for Group Select Mode. Turn the Channel Selector
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.
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.