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UNIDEN UH9050
UHF CB Transceiver
Operation
Master Scan Mode
MASTER SCAN allows continual communication across congested channels.
Master Scan scans channels stored into GS Memory and only opens the squelch for
signals with the correct subcode (CTCSS or DCS tone).
To achieve this, all radios in your group must have the same channels in GS memory
(group channels) and use the same Subcode (CTCSS or DCS tone).
By scanning only group channels, radios in the network will be able to detect and
receive group transmissions- continual communication without interruption. When
transmitting in this mode, the radio switches to an unused group channel if it detects
another signal with no code, or the wrong code, on the channel last used by the group.
In this way, all group users will be able to have continual communication to or from
other users.
CH09-CH20 are stored into GS Memory and CTCSS01 is set for MASTER SCAN
Subcode by default. The GS memory can be changed, channel by channel, if desired
- but for Master Scan to work effectively each radio in the group must have the same
channels in its GS memory.
To add/remove channels from GS SCAN Memory, refer the section above.
NOTE
RX only Channels (CH22, CH23, CH61, CH62 and CH63), User
Programmable RX Channels (CH81 to CH180) and Police or Fire (&
Ambulance) channels group will not be included in MASTER SCAN
Mode even though stored into GS Memory Also channels for which
Duplex Setting are On will be skipped in MASTER SCAN Mode.
