Uniden GPS105 - Manual (Page 16)

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If DUPLEX is selected from the MENU options when the channel is not from
CH01 - CH08, an error tone sounds.
TO OPERATE IN DUPLEX MODE (REPEATERS)
Operation with the aid of a Repeater
The Duplex function enables you to access local repeater stations. You can only activate Duplex from CH01-CH08.
UHF CB Repeaters are used to retransmit or relay your signal.
Repeaters will extend the range of your radio and overcome the shielding effect caused by solid obstructions.
Contact a retailer for a list of repeaters available in your area.
UHF CB - OPERATION
To turn DUPLEX ON/OFF:
1. Select the channel of the repeater in your area (CH01 - CH08).
2. Press & hold .
3. Scroll to highlight DUPLEX.
4. Press .
5. Press or to select ON or OFF as desired.
6. Press to confirm selection.
'DUPLEX' will appear when a duplex channel is used only if duplex is turned ON.
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