Motorola APX MOBILE O3 CONTROL HEAD, User Manual

Page: 126 / 160

With Channel Change on Off Hook
enabled, when the HUB is placed off-
hook, and there is radio switch, the
new selected radio moves to the target
channel zone on off hook, and the new
unselected radio reverts to the last user
selected channel before off-hook.
The Off
Hook
State for
Multiple
Radios
Setup When there are multi-control heads
connected, the states of these HUBs
reflect the active control head(s) state.
Any HUB placed off-hook by active
control head(s) makes the radio goes
off-hook state. Only when all HUBs are
placed on-hook, the radio can be in on-
hook state.
Note:
This feature needs to be carefully enabled.
Users must also be familiar with the
functionality of this feature as they have to be
aware that removing the microphone triggers
mode change most of the time.
Low Voltage Threshold Warning
This feature is created for APX mobile radio to
provide warning for low voltage threshold.
A specific external device is attached to the radio to
monitor the automobile voltage. When the car battery
went lower than a pre-defined threshold, the external
device asserts the Vehicular Interface Port (VIP) input
to the radio. When the voltage of the battery becomes
normal, the external device de-asserts the VIP input
to the radio.
The voltage threshold is customized in the external
device settings.
When the VIP switch turns on, the VIP asserts input
to the radio. The radio immediately initiates a 15
seconds of low Voltage Pre-alert Timer. If the status
of the VIP changed before this time-out timer ends,
the radio returns to normal operation.
If the status from the VIP unchanged when the time-
out timer ends, the radio shows
Low battery
on the
display and also sounds low battery/voltage alert
tone. The radio sounds a short, high-pitched tone
immediately after the
PTT button is released.
Advanced Features
122
English