DOC 6511_Release K
ATS-6511A/B/C Users Guide
58
6.5 Troubleshooting Summary
Active alarms and the troubleshooting steps to resolve the problem are summarized in
Table 6
-1.
Table 6-1 – Troubleshooting alarms summary
Active Alarm:
Steps to resolve issue
clock_wander
This alarm should clear within 1 hour. If not there is an internal error.
Replace the ATS 6511.
configuration not readable
An internal I2C bus is not responding. The unit should continue to operate
correctly, but should be power cycled at a convenient time. If the power
cycle does not clear the alarm, return the unit for repair.
fan 1
Check left side fan rotation. If not rotating, replace fan.
If rotating, remove fan module by loosening two screws on the fan module
and slide out the front. Check the contacts from the wires through the
connectors for loose connection. If no loose connections are found, replace
the fan.
fan 2
Check right side fan rotation. If not rotating, replace fan.
If rotating, remove fan module by loosening two screws on the fan module
and slide out the front. Check the contacts from the wires through the
connectors for loose connection. If no loose connections are found, replace
the fan.
Fiber Signal Present
Check the fiber cable to ensure it is connected and is the correct mode for
the transceivers in use. Check the fiber mode setting on the ATS 6511 to
ensure it matches the fiber protocol on the ATS 6501B (4372A, 4372A-T
and SW version on ATS 6501B matches the version on the ATS 6511)
firmware_version_mismatch
Software is unable to load new firmware into one of the internal FPGAs.
Replace the ATS 6511.
hp5071
electron_multiplier_voltage
Check 5071A electron multiplier voltage, if more than 2550V replace the
5071A.
locked
Check 5071A continuous operation, if not in continuous operation replace
the 5071A.
oscillator_control
Check 5071A oscillator control, if more than 95% replace the 5071A.
signal_gain
Check 5071A signal gain, if more than 95% replace the 5071A.
leapseconds
internal_error
Leap seconds have not been determined properly, contact Symmetricom.
unknown
Leap seconds have not been determined properly, contact Symmetricom.
ocxo_freq_control
Internal OCXO control voltage is within 98% of maximum, replace ATS
6511 as soon as possible.
output_modules
1-6
If one port is reporting a hardware error, remove the cable connected to
that port and see if the alarm clears. If it does not, replace the plug in
module.
over_temperature
Internal temperature is over limit. Ensure fan airflow is not restricted and
fans are rotating. If there are no fan alarms, fans are rotating at speed and
the fan filter is clear of debris, replace the ATS 6511 at earliest
convenience.
power_supply 1
Ensure power supply is fully seated from the front.
Ensure power cord is connected at both the power supply and power strip.
power_supply 2
Ensure power supply is fully seated from the front.
Ensure power cord is connected at both the power supply and power strip.
ref_unlocked
Check 5071A to ATS 6511B reference input cable.
syscfg
Confirm that the ATS 6511 settings match the settings in the sys_cfg file.
tcxo_failure
Replace the ATS 6511.
outputs disabled
If this alarm is present and no other alarms are present, reboot the ATS
6501. If the problem is not cleared, replace the ATS 6511.
ocxo_freq_control
Status only, not an alarm. Monitor for readings reaching over 90, which
Summary of Contents for ATS-6511A
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