Operation
24
UNIDEN UH9000
UHF CB Transceiver
MASTER SCAN Mode
MASTER SCAN is the default scan mode and is enabled to allow continual communica-
tion 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 transmis
-
sions- 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 previous section.
NOTE
RX only Channels (CH22, CH23, CH61, CH62 and CH63), Emergency Channels
(CH05, CH35), 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.
To select MASTER SCAN Mode:
1. Press
9 times. The scan
setting flashes.
2. Turn the rotary knob or press
/
on the microphone till MASTR flashes and
press
to save scan type setting.
3. Turn the rotary knob or press
/
to select desired preset GS memory group
and press
to save the setting.
P-: Master Scan is ON with the current GS channel memory. Open/Group
Scan is disabled.
P1: Master Scan is ON with loading CH09-20 in GS.
P2: Master Scan is ON with loading CH21-30, 39, 40 in GS.
P3: Master Scan is ON with loading CH49-60 in GS.
P4: Master Scan is ON with loading CH61-70, 79, 80 in GS.