Nautel VX150 - Page 33

VX150 TO VX2 TROUBLESHOOTING MANUAL RESPONDING TO ALARMS
VERSION 2.0 2023-04-20 PAGE 3.1.25
MPX 1/2 Low Audio
The MPX1/2 input level has fallen below the
user configured low audio threshold for
longer than the user configured timeout.
The MPX1/2 input must be configured as the
main audio source in the active preset for this
alarm to trigger.
The Main Audio Low Audio Alarm must be
enabled in the active preset for this alarm to
occur.
The presence of this alarm will cause a switch
to the backup audio source if configured in
the active preset.
This alarm will clear immediately when the
MPX1/2 input level has increased above the
configured threshold.
Performing an alarm reset will clear this
alarm and reset the timeout.
Clearing this alarm will cause a switch back to
the main audio source if the transmitter was
previously operating on the backup source.
Check the composite feed connected to
the MPX1/2 input. The most likely cause
of this alarm is an interruption in
composite distribution to the
transmitter.
Verify that the threshold level
programmed in the active preset is
below the normal input level by checking
the MPX1/2 meter.
Verify that the configured timeout is long
enough to cover any silence or dips in
signal level.
MPX 1/2 Low Backup Audio
Check the composite feed connected to the
MPX1/2 input. The most likely cause of this
alarm is an interruption in composite
distribution to the transmitter.
Verify that the threshold level programmed in
the active preset is below the normal input
level by checking the MPX1/2 meter.
Verify that the configured timeout is long
enough to cover any silence or dips in signal
level.
This alarm will clear immediately when the
MPX1/2 audio input level has increased
above the configured threshold.
Performing an alarm reset will clear this alarm
and reset the timeout.
Check the audio feed connected to the
MPX1/2 input. The most likely cause of
this alarm is an interruption in composite
distribution to the transmitter.
Verify that the threshold level
programmed in the active preset is
below the normal audio input level by
checking the MPX1/2 meter.
Verify that the configured timeout is long
enough to cover any silence or dips in
signal level.
Need to run Autobias Routine
No saved PA or IPA bias voltages loaded
when the transmitter booted, the Autobias
routine should be run.
When triggered, the system will fall back to
default bias voltages.
This alarm will clear when the Autobias
routine is run.
If this alarm is present, it’s most likely
that a configuration file contained on the
transmitter SD card has been corrupted
or is missing.
Run the Autobias routine in Settings-
>Transmitter Settings->Run Autobias
Routine.
Alarm Name Trigger Conditions Clear Conditions Troubleshooting