Adtran TRC4106 Manual Do Utilizador

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Section 6, Troubleshooting Guide
TRACER 4206 System Manual
62
© 2002 ADTRAN, Inc.
612804206L1-1B
1.
OVERVIEW
This troubleshooting guide provides recommended actions for various conditions of the TRACER 
4106/4206 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.
2.
LED INDICATORS
PWR LED
If the 
PWR
 LED is not 
ON
 and solid green, it is an indicator that the TRACER 4106/4206 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 4106/4206 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.
TST LED
The 
TST
 will remain 
ON
 (solid Amber) during power-up to indicate a self-test is in progress. If the 
TST
 
LED is blinking or remains 
ON
 after 10 seconds, this indicates that the TRACER 4106/4206 unit has failed 
self-test. This is an internal failure, and ADTRAN technical support should be contacted.
RF DOWN LED
If the 
RF DOWN
 LED is 
ON
 (solid Red), it is an indicator that there is a problem with the RF link to the 
TRACER 4106/4206.
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 and that both ends 
have the same Band Plan Number (ex. A1 and B1).
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.