20 BK Radio
To reply to a message on the priority channel,
press the PTT switch. The radio transmits only
on the priority channel when Switch C (priority)
is up. Once activity has ceased on the priority
channel, the radio returns to the receive
channel on the Channel Selector knob.
Priority Mode C with Scan
With Switches B (scan) and C (priority) up, the
radio scans until it locks on to an active
channel. The radio continues to sample the
priority channel while listening to the active
channel. If activity occurs on the priority
channel, the radio overrides the active scan
channel, changes to the priority channel, and
holds for the duration of the transmission.
To reply to a message on the priority channel,
press the PTT switch. The radio transmits only
on the priority channel when Switch C
(priority) is up. Once activity has ceased on
the priority channel, the radio returns to scan
operation.
CHANGE THE PRIORITY 1 CHANNEL
The fixed Priority 1 channel can be
permanently set or can be changeable. If the
radio has a changeable priority channel, use
the following steps to make this change:
1.
Slide Switches B (scan) and C (priority)
down.
2.
Use the keypad to change groups, if
necessary.
Turn the Channel Selector
knob to the channel you want to enter as
the new Priority 1 channel.
3. Press the
[PRI]
key. A short beep sounds
and
PR
appears in the display, indicating
that the displayed channel is now the
Priority 1 channel.
PR
LABEL 3
1
2
3
4
5
6
7
8
9
0
*
#
CLR
FCN
PRI
ENT
GPH-CMD Owner’s Manual 17
PRIORITY SCAN
Priority Scan enables the radio to receive on
any channel while monitoring for a message
on the designated priority channel(s). The
radio samples each priority channel at a
preset rate (.25-2.0 seconds) regardless of
activity on any other channel. Priority Scan
operates only while the radio is not
transmitting and can be used in combination
with scan operation.
When Switch C (P riority) is up, the display
flashes
SCN
. If a message is received on a
priority channel, the Priority Indicator lights,
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
Code Guard with:
•
Switch C (Priority) up
•
The Squelch knob in the Code Guard
position (fully counterclockwise detent
position) and
•
The Priority Channel(s) programmed with
Code 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 Code
Guard value is present. If the signal contains
the proper Code 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
Up to two of the radio’s 500 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, including PR2.
SCN
LABEL 3
PR SCN
LABEL 8
