PTT (Push To Talk) Switch
Press this switch to transmit, and release it (to receive) after your transmission is com-
Pressing this switch disables the noise squelching action, allowing you to hear very
weak signals near the background noise level temporarily.
Press the [ F/W ] key on the keypad first, then press this switch to "open" the squelch
continuously. Press this switch again to resume normal (quiet) monitoring.
Pressing this switch illuminates the LCD and keypad for five seconds, after which the
back-lighting will automatically turn off.
Press the [ F/W ] key on the keypad first, then press this switch to activate the back-
lighting lamp continuously. To turn the lamp off, press this switch again.
You can change the primary (press key) function of this switch, if you prefer. See page
17 for details.
miniature jack pro-
v i d e s c o n n e c t i o n
points for microphone
audio, earphone au-
dio, PTT, and ground.
EXT DC Jack
This coaxial DC jack
allows connection to
an external DC power
source (6-16V DC).
The center pin of this
jack is the Positive (+)