...........continued
Alarm Name
Trigger Condition
Clearance Condition
Recommended
Corrective Action
Antenna Current Low
Current through the
antenna port drops below 3
mA.
Current through the
antenna port increases
above 5 mA.
Electrically test antenna
installation using
11.5. Antenna Installation
Troubleshooting
.
Holdover
Device was synchronized
to a time source, but has
lost all time sources it can
synchronize to, causing a
transition from ‘in sync’ to
‘holdover’.
Device regains
synchronization to a time
source, becoming ‘in sync’.
Device becomes ‘out of
sync’ by exceeding an
inaccuracy threshold or
going through holdover
timeout.
2
If alarm is recurring,
ensure that the device’s
primary time source is
consistently available.
Out of Sync
Device entered ‘holdover’
then became ‘out of
sync’ by exceeding the
maximum internal time
inaccuracy threshold, or
through holdover timeout.
2
Device is ‘in sync’ again
through synchronization to
an external time source.
Ensure device has a
reliable external time
source available.
No First Sync
Device has not
synchronized to a time
source since powering up.
Device has synchronized
to a time source since
powering up.
Ensure device has
external time sources
available.
If sources are available,
wait a few minutes to
allow the device to gain
synchronization.
No IRIG In
IRIG-B input signal
previously sensed on at
least one active IRIG-In port
is no longer being sensed.
IRIG-B signal sensed on at
least one IRIG input again.
If alarm is recurring, check
if IRIG signal is present
on the device’s input with
an IRIG-B Analyzer or
oscilloscope.
No Valid IRIG In
IRIG-B input signal has
been detected on input.
Signal doesn’t meet
IRIG synchronization input
requirements .
3
IRIG-B input signal that
meets synchronization
input requirements
detected.
If alarm is recurring, check
the input signal meets
IRIG-B input requirements.
Power Supply {A|B}
(dual power supply units
only)
Power supply A or B has
failed.
Power supply A or B is
operational again.
Contact Microchip
technical support.
11.10. Contacting
Technical Support
No Frequency Info
Frequency adjustment
information is no longer
being generated from the
internal oscillator due to a
failure.
Frequency adjustment
information is being
generated again.
Contact Microchip
technical support.
11.10. Contacting
Technical Support
Internal Loss of Comms
An internal communications
failure has occurred.
Normal internal
communications resumes.
Contact Microchip
technical
support.
Maintenance and Troubleshooting
©
2022 Microchip Technology Inc.
and its subsidiaries
Manual
DS00004572A-page 225
