Symmetricom TimeSource 3600 User Manual page 189

Table 5-2. Message Troubleshooting (Continued)
Message
HIGH CURRENT
FAULT
LOW CURRENT
FAULT
SPAN x AIS
097-72060-01 Revision J – June, 2007
Meaning
Current to antenna is
outside specification.
An AIS has been received
on the specified input span.
Troubleshooting with Error Messages
Action
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 24 V DC ±2 V
dc, replace the TimeSource 3600
Procedure 5-1
card using
4. If the voltage is 24 V DC ±2 V dc,
measure the current between the
connector center pin and the
connector housing on the shelf
TNC antenna connector.
5. If the current is less than 110 mA
or more than 150 mA, replace
the TimeSource 3600 card using
Procedure 5-1
. 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 24 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.
Troubleshoot the specified input
span signal (check the source).
TimeSource 3600 User's Guide 189
Chapter 5 Troubleshooting
.