8G093X01 R5
VR Programming Guide
August 2022 Page 101 of 144
MSU Mic call
Local Repeat
in SYS Mode
When the VR is in
the SYSTEM
mode, this setting
determines if MSU
Mic calls are
repeated by the VR
to the Local PSUs.
When disabled
(unchecked) the
VR does not
transmit Mic audio
to the LPSUs when
the MSU Mic is
PTT-ed and the VR
is in the SYSTEM
mode.
When enabled
(checked), MSU
Mic call audio is
transmitted by both
the MSU and the
VR when the VR is
in SYSTEM Mode.
This is default
option for VR.
In single VR user applications this option could be
used to disable local repeat and prevent audio
feedback from MSU Mic and LPSU when the user is
inside the vehicle.
VR
Activation
via MSU
Mode
Change
Enables / Disables
the VR activation by
changing the
selected MSU
Mode. If disabled
and the VR is in
OFF mode,
changing the MSU
selection to a new
mode programmed
for SYSTEM or
LOCAL will not
cause any change
to the VR mode (VR
stays OFF). If
enabled and the
MSU mode is
changed to a new
one programmed
for an active mode,
then the VR will
switch from OFF to
SYSTEM or LOCAL
respectively.
This field is only considered when the user changes
MSU mode via the control head channel selector. It
is not used when modifying MSU mode via remote
steering.
If Rptr Independent Channel Change = OFF, and VR
Activation via MSU Mode Change = ON, then all
fields within the Power Up Options frame should be
disabled/greyed.
System
Channel
Acquisition
Time
Determines the VR
wait time for the
system grant
before the VR
decides what tones
(Ack or NACK)
must be sent to the
Local PSUs and
starts local repeat.
This timer also determines the maximum number of
retries that will be made by the VR to acquire a
system channel. These retries are sent every
second so if the intent is to allow 2 retries, the timer
needs to be set to 1800 – 2000ms to allow sufficient
response time.
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