Motorola APX MOBILE O3 CONTROL HEAD, User Manual

Page: 58 / 160

d) If you hear no activity, press and hold the PTT
button to start your conversation.
• Monitoring a Channel in Trunked Modes:
a) Lift the microphone off hook.
b) Press the
PTT button.
c) If you hear two, short, high-pitched tones, or if
you hear no tone and the indicator lights
steadily, then proceed with your message.
d) Release the PTT button to receive (listen).
If you are not in the range of the system, you may
hear a continuous low-pitched tone and the display
shows
Out of range
.
Monitoring Conventional Mode
This feature must first be enabled by a qualified radio
technician or system administrator.
This feature allows you to monitor channel traffic on
conventional channels by defeating the coded
squelch. Thus, you can to listen to another user
active on the channel. This way, you may be
prevented from talking over someone else’s
conversation.
1 To activate monitoring, perform one of the
following actions:
• At Home mode where the default zone and
channel are being displayed, or to
Mon
and press the Menu Select button directly
below
Mon
momentarily.
• Take the control head off hook.
The display shows
Monitor On
. You hear all
channel traffic.
2 Press the Menu Select button again to deactivate
the monitoring.
The display shows
Monitor off
.
Monitor on
shown on the display indicates that the
radio is monitoring. Pressing the Menu Select button
again turns monitor off and you don’t hear all channel
traffic. If you try to transmit on a receive-only channel,
you hear an invalid tone until you release the
PTT
button.
General Radio Operation
54
English