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DOC 6501_Release V
ATS-6501 Users Guide
120
Current Alarm:
Steps to resolve issue
gps_invalid_fixed_position
The programmed position does not match the position programmed into the
system configuration file. Ensure both positions are set correctly.
gps_tracking
GPS receiver is unable to successfully track satellites. Check all GPS
antenna connections and the antenna for clear view of the sky. Ensure the
position is set correctly. Ensure the antenna voltage is set to +12V.
hp5071
electron_multiplier_voltage
Check 5071A electron multiplier voltage, if more than 2550V replace the
5071A. Note 2553 is Max value.
locked
Check 5071A continuous operation light, If off 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 Microsemi.
unknown
Leap seconds have not been determined properly, contact Microsemi.
ocxo_freq_control
Internal OCXO control voltage is within 98% of maximum, replace ATS
6501 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. If it clears check the end user system for faults/failures.
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 6501.
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 6501 reference input cable. (reference=external)
syscfg
Confirm that the ATS 6501 settings match the settings in the sys_cfg file.
tcxo_failure
Replace the ATS 6501.
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 6501.
ocxo_freq_control N
Status only, not an alarm. Monitor for readings reaching over 90, which
indicates the OCXO is reaching the end of its control range. Replace the
ATS 6501 as soon as reasonably possible.
gps_antenna_short
Check the antenna cable and antenna for a short. If there is no short in
either of those items and the alarm continues with no antenna cable
connected to the ATS 6501, replace the ATS 6501.
gps_battery_charger
The internal battery charger for the GPS receiver battery backup has failed,
replace the ATS 6501.
ref_unlocked -- cannot
communicate with device
Check USB to serial cable and Null modem cable to ensure it is connected
to the ATS 6501 USB port and the 5071A Serial Port. Ensure the 5071A
serial port is set to 9600 Baud, No Parity, 8 Data Bits, and 1 Stop Bit
(9600,N,8,1).
Table 10 Troubleshooting Summary