6.7
Transceiver Behavior during the Scan
This section describes various behaviors of the transceiver during the scan.
Note
The length of time from when the transceiver pauses the scan for transmission or reception until the transceiver resumes
the scan can be configured using
Dropout Delay Time
and
Dwell Time
.)
Transceiver Behavior When a Zone-channel Is Changed during the Scan
If a Zone-channel is changed manually during the scan, the transceiver pauses the scan on a new channel. After a second
elapses, the scan resumes.
If a Zone-channel is changed manually while the scan pauses for reception, and if the channel where the scan is paused is
different from the selected channel, the scan pauses on the selected channel.
Reception Behavior during the Scan in a P25 Conventional System
The following are the reception behaviors during the scan in a P25 Conventional system:
0
Squelch Type = NAC behavior
The transceiver receives a NAC in each channel, and pauses the scan if the received NAC matches the NAC
preconfigured for the transceiver. If the matching state of the NAC becomes inconsistent,
Dropout Delay Time
is
activated. After the time configured in
Dropout Delay Time
elapses, the transceiver resumes the scan.
0
Squelch Type = Selective Call behavior
The transceiver receives a NAC and ID (Talkgroup ID or Individual ID) on each channel, and pauses the scan if the
received NAC and ID match the NAC and ID preconfigured for the transceiver.
If the matching state of the NAC or ID becomes inconsistent,
Dropout Delay Time
is activated. After the time configured
in
Dropout Delay Time
elapses, the transceiver resumes the scan. However, when an Individual Call is received, the
scan may not resume even when the time configured in
Dropout Delay Time
elapses depending on the configuration
in
Auto Reset Timer
.
0
Squelch Type = Optional Signaling behavior
If “Optional Signaling” is configured in
Squelch Type
, the transceiver behaves as follows according to the configuration
in
Audio Control
:
0
NAC behavior
The transceiver receives a NAC in each channel, and pauses the scan if the received NAC matches the NAC
preconfigured for the transceiver. If the matching state of the NAC becomes inconsistent,
Dropout Delay Time
is
activated. After the time configured in
Dropout Delay Time
elapses, the transceiver resumes the scan.
0
NAC-Optional Signaling (2-tone) AND behavior
The transceiver receives a NAC in each channel, and pauses the scan if the received NAC matches the NAC
preconfigured for the transceiver. In this case, no audio sounds from the speaker, and the transceiver waits to receive
Optional Signaling (2-tone code). If the matching state of the NAC becomes inconsistent while the transceiver is waiting
to receive Optional Signaling,
Dropout Delay Time
is activated. After the time configured in
Dropout Delay Time
elapses, the transceiver resumes the scan.
6 SCAN
6.7 Transceiver Behavior during the Scan
P25 FUNC (K)/Ver 2.20
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