ADVANCED FEATURES
CTCSS (Continuous Tone Coded Squelch System)
CTCSS is a feature that allows a group to talk to each other without hearing other users on the same channel.
Programming CTCSS Code
1.Select a desired channel to be used with CTCSS.
2.Press and hold ctcss for 1.5 secs. CTCSS icon blinks.
3.Press 
or 
to select the desired CTCSS code.
4.Press ctcss to save the selected code. CTCSS icon stops blinking.
The uh073sx will return to standby mode after 10 secs. of no activity. CTCSS code can be programmed on every channel. There are 38 available CTCSS tone per channel.
CTCSS Scan Operation
1. Press scan to start scanning (GS or OS) mode.
2.Press and hold ctcss to change to CTCSS scan mode.
3.When a signal is sensed on a CTCSS CH, the uh073sx stops for about 400 msecs (decode time) to decode the CTCSS code. If there is no code or the receive code does not match the one programmed on the unit, the unit resumes scanning.
Channels 5 and 35 are used for emergency channels. CTCSS will not operate on these channels.
VOX
transmit automatically by speaking on the microphone of the VOX headset
(not supplied) without pressing the PTT switch.
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