UNIDEN Model UH400SX,
Operation
Operating the UHF CB Radio in Duplex Mode
For this example we are adopting CH01 as the channel being used in your area for repeater use.
1. Press [MENU/ENTER]. The duplex setting flashes.
2. Turn the Rotary Channel Selector
at the base or press 
on the Remote SPK/MIC to change the setting between ON or OFF on the base or “0” or “r” on the
Remote SPK/MIC.
3. Press [MENU/ENTER] to store the setting.
4. Press and hold [MENU/ENTER] to exit from the menu mode. Only channels 01 - 08 are available for Duplex.
Check with your local Retailer for information on available repeaters.
Scanning
The UHF CB Radio has a scanning feature that allows you to search for active channels automatically.
Furthermore, the UHF CB Radio is designed to have two types of scanning; Open Scanning (OS) and Group Scanning (GS), to give you flexibility and allow you to use the radio more effectively. Press [SCAN/OS/GS] and Scanning starts.
The SCAN icon appears.
The scan direction can be changed at any time by rotating the channel selector left or right or pressing 
on the Remote SPK/MIC.
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uh400sx, uh500sx,
1/2/08 1:31:27 PM
