User's Manual

Maintenance Manual
UDM-240ZH/ZBH
8
3 DESCRIPTION OF CONTROLS & INDICATORS
Detail operating instructions can be found in the next page.
3-1 Key and Button
Power On/Off button
Press the “power” button for more than 2 seconds then, the UDM is turned ON.
Press the “power” + “menu” button for more than 2 seconds then, the UDM is turned
OFF.
Depending on the application, the power button can be used as a PTT button or INT
button.
UP, Down button
Up/Down buttons are used for changing channels. The number of channels are
16(11Ch ~ 26CH) and it can be displayed C11~C26 or H11~H26.
Main-PTT
If you press this button, the UDM-240ZH will be transmission mode and if you release