Adtran TRC4205 Manual Do Utilizador

Section 6, Troubleshooting Guide

TRACER 4205 System Manual

52

© 2002 ADTRAN, Inc.

612804205L1-1A

This troubleshooting guide provides recommended actions for various conditions of the TRACER 4205 
system. The status LEDs (located on the front panel of the unit) provide information to help determine the 
necessary troubleshooting action. Recommended actions for resolving possible status LED indicators are 
contained in this guide.

If the 

 LED is not 

 and solid green, it is an indicator that the TRACER 4205 is not receiving 

adequate DC power. 

Recommended Actions:

1.

Verify that the power source is delivering between 21 and 63 VDC.

2.

Check the polarity of the power connection (referenced to ground) of both the TRACER 4205 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 with a 1Amp, 250 Volt (2-inch) slow-blo fuse.

The 

 will remain 

 (solid Amber) during power-up to indicate a self-test is in progress. If the 

 

LED is blinking or remains 

 after 10 seconds, this indicates that the TRACER 4205 unit has failed 

self-test. This is an internal failure, and ADTRAN technical support should be contacted.

If the 

 LED is 

 (solid Red), it is an indicator that there is a problem with the RF link to the 

TRACER 4205.

Recommended Actions:

1.

Check the RF coaxial cable connection.

2.

Measure the RSSI voltage. If the signal is acceptable (> 2.0 VDC at RSSI test point), go to Step 6.

3.

Verify that one end of the link is configured as Plan A and the other end is Plan B.

4.

Verify that the antenna polarization is the same at both ends of the RF signal transmit and receive 
path.

5.

Verify the RF signal path is clear.

6.

Check for possible interference at both ends of the link. If necessary, change polarization and/or Band 
Plans at both ends.

7.

Check the integrity of lightning arrestors.