Scan Operation; Scanning - Motorola GM300 Series Selling Manual

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5.0

Scan Operation

5.1

Scanning

Scanning allows activity on different communication channels to be monitored. Each radio can be
programmed with up to 32 scan lists, and each scan list can contain up to sixteen channels which
are listened to sequentially.
Once scan has started, detection of an incoming call causes the radio to automatically switch to the
channel so that the call can be received and scan temporarily stops: this is called the "landed" state.
Benefits
Efficient communication - incoming calls are not missed even when they can be received from


more than one communication channel.
Simplifies the radio operation for users of multiple communication channels.


5.1.1 Single Priority Scan
Each list can specify a "Priority" channel that is monitored for activity more often, even when the
radio is "landed" and listening to another channel in the scan list. If the correct unmute condition is
detected on the priority channel when the radio has 'landed on' another channel, the priority alert
will sound and it will switch to the priority channel to take the call.
5.1.2 Scan Activation
Each channel can be programmed to use any of the scan lists. Scan is activated by:
pressing a programmable button that has been programmed as the Scan button;


selecting scan via the menu;


changing to a channel which has been programmed with "Automatically Start Scan": -


this starts scan operation as soon as the radio switches to that channel, i.e. Auto Scan.
5.1.3 Scan Transmit Channel and Talkback
When the radio is not in the landed state (i.e. it is actively scanning, looking for valid channel
activity), pressing the PTT causes the radio to change to the defined "Scan Transmit Channel",
where it remains for the duration of the two-way conversation, after which active scanning resumes.
The Scan Transmit Channel choices are:
Scan Start Channel


Designated Channel


Last Free Channel


Last Busy Channel


Voted Channel


"Talkback" mode allows the user to respond directly to messages received on "landed" channels, as
long as the response begins during the programmable scan hang timer (called the listen "Scan
Reset" Timer). If Talkback is disabled, pressing the PTT when in the landed state causes the radio
to change to the defined "Scan Transmit Channel". Talkback has no impact when the radio is
actively scanning - it only has an impact on the radio's operation in the landed state.
FEATURES AND BENEFITS