Maas AHT-28-V, User Manual

Page: 19 / 72

MONI
PTT
CALL
12 13
RADIO ILLUSTRATION
BUSY/TX
The indicator turns green
during receive and turns
red during transmit/
emergency alarm.
MIC
The internal microphone
is located here.
POWER/VOLUME DIAL
This control toggle the
transceiver’s power on/off and
adjust the audio volume level.
SPEAKER
The internal speaker is
located here.
KEYBOARD
These 18 keys select the
operating features on the
transceiver. The function
of the keys are described
in details on pgs. 16&17.
ANTENNA
Connect the supplied
antenna here.
SP
MIC
CALL
Activates T-CALL (1750Hz) for
repeater access and transmit
DTMF and 2/5 tone signaling.
PTT
Press it to transmit and release
it to receive after your
transmission is completed.
MONI
Press this key disables the
noise squelching action,
allowing you to hear very weak
signals near the back-ground
noise level.
MIC/SP
The jack provides connection
points for microphone audio,
earphone audio, speaker and
program cable.