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5
Troubleshooting
211
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HIGH CURRENT
FAULT
Current to antenna is outside
specification.
If not accompanied by the GPS ERROR
alarm, none required.
If accompanied by the GPS ERROR
alarm:
1. Check the cable connections
between the TimeSource 3600 Shelf
and the antenna.
2. If the error repeats, remove the
antenna cable from the rear of the
shelf, and measure the dc voltage
from the connector center pin to
the connector housing on the shelf
TNC antenna connector.
3. If the voltage is not 18 V dc ±2 V
dc, replace the TimeSource 3600
card, using Procedure Procedure H.
4. If the voltage is 18 V dc ±2 V dc,
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 3600 card, using
Procedure Procedure H. If not
(nominal current is 125 mA), re-
connect the antenna cable to the
rear of 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 V dc 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, replace the
antenna.
LOW CURRENT
FAULT
Table L. Message Troubleshooting (cont’d)
Message
Meaning
Action
Summary of Contents for TimeSource 3600
Page 1: ...TimeSource 3600 GPS Primary Reference Source 097 72060 01 Issue 2 ...
Page 4: ...4 TimeSource 3600 This page intentionally left blank ...
Page 16: ...16 TimeSource 3600 This page intentionally left blank ...
Page 121: ...4 Chapter TL1 Reference This chapter provides information for using the TL1 language ...
Page 223: ...6 Chapter Specifications This chapter provides equipment specifications ...
Page 247: ...Index ...