Selecting Priority Scan; Network Scan (Net-Scan); Enabling Net-Scan; Using Net-Scan - GME XRS-330C Instruction Manual

Selecting Priority Scan

To select Priority Scan, refer to the MENU / SCAN SETTINGS
options.
To begin scanning
Briefly press SCAN. A high beep will be heard, 'SCANNING' will be
displayed and the icon will animate. During this time the scan
mode and the number of channels being scanned will be displayed
along with the selected Zone.
• If a signal appears on the Priority channel - at any time - the
radio will switch directly to the Priority channel and will stay
there for as long as the channel remains busy. During this time
you can transmit and receive on the Priority channel.
Once the Priority channel has been clear for 5 seconds the radio
will resume scanning the other channels.
• If a signal appears on any other channel, scanning will pause on
that channel and will remain there while the channel is busy - as
long as there are no signals on the Priority channel.
During this time, the receiver will continue to check the Priority
channel every 2 seconds resulting in a series of small breaks in the
reception. Once the signal has gone and there has been no activity
for 5 seconds, the radio will resume scanning.
• If the radio is paused on a busy channel and you want to remain
there, briefly press SCAN. The radio will exit scan and remain on
the busy channel. At this point you will no longer be monitoring
the Priority channel.
To resume the Priority Scan press SCAN again.
• If you don't wish to listen to a busy channel, briefly press
the or key while the radio is paused on that channel.
The busy channel will be temporarily removed from the Scan
Group to allow time for the channel to become clear again and
scanning will continue. The skipped channel will be automatically
reinstated in the scan sequence after 30 seconds (see 'Auto skip').
• To transmit on the Priority channel at any time, simply press the
PTT. The radio will switch straight to the Priority channel.
When you have finished your conversation and there has been no
further activity for 5 seconds, the radio will resume scanning the
other channels.
To jump straight to the Priority channel at any time, briefly press
the PRI key. The scan will be cancelled.

Network Scan (Net-Scan)

Net-Scan allows a group of radio users to maintain
communications even when the band is congested.
To achieve this, all members of the Net-Scan group must share a
common CTCSS/DCS code and a common set of scan channels.
Once activated, Net-Scan's intelligent scanning software keeps
track of clear channels within your Scan Group. When any member
of the group first transmits, their radio automatically selects a
clear channel to transmit on. Other radios scanning in the same
Net-Scan group will detect the common CTCSS/DCS code and lock
onto that channel allowing all members of the group to join the
conversation.
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If a signal from outside your Net-Scan group transmits on the
selected channel without using your chosen CTCSS/DCS code, the
group will automatically switch to a new clear channel at the next
transmission. In this way the group can continue to communicate
with minimal interference to or from other users.

Enabling Net-Scan

To select Network Scan and a suitable CTCSS/DCS code, refer to
the MENU / SCAN SETTINGS options.

Using Net-Scan

With Net-Scan mode enabled, briefly press SCAN. A high beep
will be heard, 'SCANNING' will be displayed and the
will animate. During this time the scan mode and the number of
channels being scanned will be displayed along with the
selected Zone.
When a member of the group initiates a transmission their radio
will automatically select a clear Net-Scan channel to transmit on.
Other radios scanning in the same Net-Scan group will locate the
transmission by identifying the groups CTCSS/DCS code, pause on
that channel and open their Squelch, allowing the transmission to
be heard across the entire group. When the transmission ends, all
radios in the group will immediately resume scanning.
If a member of the group responds to the initial transmission, they
will automatically re-use the same channel as long as the channel
remains free of other signals. This allows the radios in the group
to respond more quickly to further transmissions from others in
the group.
If at any time a signal from outside your Net-Scan group transmits
on the selected channel without using your chosen CTCSS/DCS
code, the channel will be discarded and a new clear channel will
be selected at the next transmission. The other radios in the group
will then relocate to the new channel allowing the conversation to
continue seamlessly without any input from the user.

Ending the Scan

To stop scanning, briefly press SCAN. A low beep will be heard
and the icon will stop animating. As long as the radio was not
on a busy channel, it will return to the last channel you selected,
otherwise it will stay on the busy channel.

CTCSS AND DCS

The standard Squelch system operates solely on signal strength
which means that it will open to any signal that is strong enough.
If the selected channel is busy with other stations the Squelch will
be opening constantly making it difficult to determine which calls
are meant for you.
CTCSS (Continuous Tone Coded Squelch System) and DCS (Digital
Coded Squelch) are similar Squelch quieting systems that provide
selective audio muting using sub-audible signalling. When CTCSS
or DCS is enabled, only signals with a matching sub-tone will be
heard in the speaker. This effectively creates a channel that is
silent to all traffic except those you wish to hear.

Choosing CTCSS or DCS

The CTCSS system uses 1 of 50 low frequency tones to open
and close the Squelch on the radio. The DCS system is similar
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