Press MENU buttons as many times as needed until the radio displays the solid letters "MIC" on and blinks the current radio microphone gain.
The VOX icon will be displayed. Press the toggle up/down button to cycle through the microphone gain settings which are similar to the Microphone Gain Menu. Once you have selected the value you want to set (1=low gain,2= Medium gain or 3= high gain), press MENU again to save and go to the next step or turn the radio OFF to exit without saving changes. Microphone Accessory Gain can be also be configured using CPS.
Scan List Menu
Note: If the MAX CHAN setting in the radio is set up to 1 (which can be done using CPS) the Scan Menu will be disabled.
In Scan List Menu you can enable the Channel Scanning feature for a specific channel frequency for the radio. To enter Scan Menu, press MENU button as many times as needed
until the radio display the channel number with the solid CHAN icon and blink the current
setting "YES" or "NO". The SCAN icon 
will be also displayed solid:
YES |
Press the toggle 
/ 
buttons to cycle through all the channels. Press SB2 button to set SCAN to "YES" or "NO" settings. Once you have selected the value you want to set, press MENU again to save and go to the next step or Turn OFF radio to exit without saving changes. Scan List Menu can be also be configured using CPS.
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