Section 8 Troubleshooting Guide TRACER 6000 Series Integrated System Manual
126 Copyright © 2005 ADTRAN, Inc. 612806420L1-1F
1. OVERVIEW
This troubleshooting guide recommends corrective actions for various conditions of the TRACER 64x0
system. The status LEDs (located on the front panel of the unit) provide information to help determine the
necessary troubleshooting action. This guide suggests steps for resolving possible problems indicated by
the status LEDs.
2. LED INDICATORS
PWR LED
If the PWR LED is not ON and solid green, the TRACER 64x0 is not receiving adequate DC power.
Recommended Actions:
1. Verify that the power source is delivering between 21 and 60 VDC.
2. Check the polarity of the power connection (referenced to ground) of both the TRACER 64x0 unit and
the power source.
3. Check the internal fuse. The fuse is accessed from the rear panel of the unit. If this fuse is open,
replace it with a 2 A, 250 V (2-inch) slow-blo fuse.
TST LED
The TST LED will flash once (amber) during power-up to indicate a self-test is in progress. If the TST
LED is flashing or remains
ON after 10 seconds, the TRACER 64x0 unit has failed the self-test. This is an
internal failure, and Technical Support should be contacted.
RF DWN LED
If the RF DWN LED is ON (solid red), there is a problem with the RF receive path from the remote
TRACER 64x0.
Recommended Actions:
1. Verify that one end of the link is configured as frequency plan A and the other end as frequency plan B.
2. Verify that both ends of the link are configured for the same band plan (1, 2, or 3).
3. Measure the RSSI voltage and consult the RSSI calibration sheet included with the unit. If the voltage
level corresponds to a received signal power level that agrees with the calculated receive signal level,
proceed with Step 7.
4. Check the RF coaxial cable connection.
5. Verify that the antenna polarization is the same at both ends of the RF signal transmit and receive
path.
6. Verify the RF signal path is clear.
7. Check the integrity of the lightning arrestors.
8. Check for possible interference at both ends of the link. If necessary, change polarization and/or band
plans at both ends.
