18 BK Radio
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.
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 Channel
Guard
Disable
Press the
[CG]
button to disable or enable
Channel Guard operation. On analog
channels, the radio reverts to carrier squelch.
On digital channels, the radio will unmute
when a digital signal with
any NAC
is
detected. An arrow on the display points to the
CG
button when Channel Guard is
disabled
.
When Channel Guard is enabled, a message
is heard only when the proper Channel Guard
is received. Transmit Channel Guard
generation is unaffected. The
CG
button may
also be used to override Busy Channel
Lockout, if Busy Channel Override is installed.
DMH Owner’s Manual 23
When Priority Scan is on, the
PR
annunciator
illuminates, and the display flashes
SCN
(alphanumeric mode) or two flashing bars (numeric
mode). If a message is received on a priority channel,
the Priority indicator illuminates, and the radio receiver
locks onto that channel for the duration of the
transmission, unless a higher priority channel
interrupts.
Priority Scan can be used in combination with Channel
Guard with:
•
Priority Scan on (arrow appears above PRI button)
•
Channel Guard Disable off (no arrow above CG
button)
•
The Priority Channel(s) programmed with Channel
Guard
If a message is received on a priority channel, the
radio receiver locks on to the priority channel and
checks to see if the proper Channel Guard value is
present. If the signal contains the proper Channel
Guard value, the radio receives the message.
Otherwise, the radio will re-check the channel every 4
seconds, until the activity on the channel ceases.
DUAL PRIORITY SCAN
In each group, up to two of the 16 channels can be
designated as priority channels. These two, PR1 and
PR2, are periodically tested for activity, even if a
different transmission is being listened to. Activity on
PR2 preempts activity on any of the non-priority
channels. Receptions on PR1 have priority over any
other channel in the group, including PR2.
Either priority channel can be programmed as a fixed
channel, tied to the Channel Selector knob, or
programmed OFF. If the radio is programmed to
transmit on the first priority channel, transmissions will
occur on PR1 if PR1 isn’t programmed OFF, when
operating in Dual Priority Scan Mode.
If PR1 is a fixed channel, and changes to the 1
st
priority channel are allowed, the user can move the
channel selector to a new channel and press and hold
the
[PRI]
button for more than 1 second to choose a
new PR1 channel.
