Symmetricom TimeSource 3100 User Manual page 191

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Table M. Message Troubleshooting (cont'd)
Message
GPS ERROR The GPS receiver is reporting an
error.
TimeSource 3100
Troubleshooting
097-72020-01 Issue 9: November 2003
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Meaning
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Recommended Action
If accompanied by the LOW CURRENT
FAULT or HIGH CURRENT FAULT alarm,
follow the recommended action for LOW
CURRENT FAULT or HIGH CURRENT
FAULT.
If not accompanied by the LOW
CURRENT FAULT or HIGH CURRENT
FAULT alarm:
1. Remove the antenna cable from the
connector panel on the shelf.
2. Measure the dc voltage from the
antenna connector center pin to the
connector housing on the shelf TNC
antenna connector.
3. If the voltage is not 18 Vdc ±2 Vdc,
replace the TimeSource 3100 card using
Procedure F.
4. If the voltage is 18 Vdc ±2 Vdc,
measure the current between the antenna
connector center pin and the connector
housing on the shelf TNC antenna
connector.
5. If the current is less than 5 mA or more
than 500 mA, replace the TimeSource
3100 card, using Procedure F. If not
(nominal current is 125 mA, reconnect the
antenna cable to the shelf.
6. Remove the antenna cable from the
antenna, and measure dc voltage and
current from the connector center pin to
the connector housing on the cable
connector.
7. If the readings are 18 Vdc and 125 mA,
replace the antenna. If not, verify the
cable path. Replace cables, lightning
suppressor, or IF converter as necessary.
8. If the error repeats, check the view of
the sky for obstructions.
9. If the error repeats, replace the
antenna.
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