Alinco DR-138 - Manual (Page 17)

9
3
NO. KEY FUNCTION
1 UP Increase frequency, channel number or setting value.
2 DOWN Decrease frequency, channel number or setting value.
3 PTT Push-To-Talk key to transmit.
4 Numerical Keyd Input VFO frequencies and other various oprations
5 DTMF ON/OFF Switches between DTMF and function operations.
6 LOCK Switch Locks all keys excep PTT.
7 MIC Microphone element is located.
microphone MIC Connector Diagram(in the front view of connector)
Getting Acquainted