Nautel VX150, Troubleshooting Manual, Page: 22 / 182

RESPONDING TO ALARMS VX150 TO VX2 TROUBLESHOOTING MANUAL
PAGE 3.1.14 VERSION 2.0 2023-04-20
Boot Configuration Failed A serious fault has occurred during one of the
stages of the initial configuration of the
Exciter PWB that takes place after AC power
has been applied/restored or after a software
upgrade. The initial configuration of the Exciter PWB
that takes place after AC power has been
applied/restored or after a software upgrade
has completed successfully. The likely cause is damage to
configuration files or firmware stored on
the SD Card. Replace the SD Card or run
a Software Update.
Component failure on the Exciter PWB.
Consider replacement of the Exciter PWB.
See
Exciter PWB Replacement on
page 3.1.37
.
Clock PLL Unlocked The PLL in the RF clock generator has not
locked or become unlocked from its
programmed frequency. The PLL in the RF clock generator is locked to
its programmed frequency. The likely causes of this alarm are:
Error in configuring the clock generator
caused by damaged configuration files.
Replace the SD Card or run a Software
Update.
Out of range external 10 MHz input when
using external 10 MHZ to calibrate the
VCXO. Check the external 10 MHz signal.
Component failure on the Exciter PWB.
Consider replacement of the Exciter PWB.
See
Exciter PWB Replacement on
page 3.1.37
.
DMPX 1/2 Low Audio
The DMPX1/2 input level has fallen below the
user configured low audio threshold for
longer than the user configured timeout.
The DMPX1/2 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
DMPX1/2 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 switch back to
the main audio source if the transmitter was
previously operating on the backup source.
Check the audio feed connected to the
DMPX1 (AES1)/DMPX2 (AES2) input. The
most likely cause of this alarm is an
interruption in audio distribution to the
transmitter.
Verify that the threshold level
programmed in the active preset is
below the normal audio input level by
checking the DMPX1/2 meter.
Verify that the configured timeout is long
enough to cover any silence or dips in
signal level.
Alarm Name Trigger Conditions Clear Conditions Troubleshooting