7
UNIDEN UH515SX-2NB
UHF CB Radio
Operation
Automatic Squelch Feature
The UH515SX-2NB is equipped with an Automatic Squelch System which
shuts off weak transmissions and unwanted noise.
Monitor
This feature enables users to listen in for weak signals on the current
channel at the press of a button.
To use monitor,
• For continuous listening. Press and hold
(CALL/MON)
.
A double tone beep will be heard and the receiver circuit will stay
open, letting in both the noise & weak signals.
•
RX
flashes.
• To return to normal receive mode press and hold
(CALL/MON)
.
Scanning
The UH515SX-2NB has two types of scanning; Open Scanning (OS) and Group
Scanning (GS), OS Scan searches all the channels and frequencies in its
memory continuously. GS Scan is similar to OS scan but has the added ability
to monitor the priority channel every 1.5 seconds.
Scanning searchs for active channels programmed in the OS or GS memory.
To initiate scanning,
1. Assuming the unit is on CH01 when switched on.
2. Press and hold
vol
(scan)
and scanning starts.
Open Scan (OS) Mode
Allows continuous scanning of channels stored in the Open Scan (OS) memory.
If an active channel is found, scanning will stop on that channel.
NOTE
The factory has preprogrammed all the UHF-CB channels into
the Open Scan channel memory. However, you can change or
customise the channels by following the steps on programming
Scan Channels on page 8.
To skip the active channel, press
(ch)
or
. Scanning resumes.
To deactivate SCAN, press
(PTT)
or press and hold
vol
(scan)
.
