AUTOMATIC SQUELCH FEATURE
The uh047sx is equipped with an Automatic Squelch System which shuts off weak transmissions and unwanted noise.
MONITOR
This feature enables users to listen for weak signals on the current channel at the press of a key.
To use monitor:
1.Press mon key. The ‘RX’ icon will flash.
2.Release within 1.5 seconds and the unit exits Monitor mode.
3.Press and hold mon key for 2 seconds for continuous listening.
The receiver circuit will stay open, letting in both the noise & weak signals. The ‘RX’ icon flashes in this status.
4.To return to normal Receive mode press mon key. The ‘RX’ icon disappears or stops flashing in this status.
SCANNING
The scan function scans all channels which are stored in the SCAN CHANNEL MEMORY and stops at an active channel. If a PRIORITY channel has been selected then this channel will be monitored for activity every 3 seconds. When the signal stops, the uh047sx waits 2 seconds (Reply Delay) before scanning resumes.
To initiate scanning;
1. Press mem/SCN key momentarily to begin scanning.
The ‘SCAN’ icon is displayed.
2. Press select/
, mem/SCN or 
/call key to cancel.
When scan stops at a busy channel, pressing ch/txp key will resume scan.
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