Adtran TRC6410 Manual Do Utilizador

TRACER 6000 Series Integrated System Manual

Section 8  Troubleshooting Guide

612806420L1-1D

Copyright © 2005 ADTRAN, Inc.

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CRC errors indicate that the receiver is unable to synchronize to the CRC-4 frame pattern of the received 
E1 signal. 

1.

Verify the TRACER 64x0 unit and the attached equipment are configured for the same signaling 
(M

, U

, or F

).

2. Verify the cable connections for the E1 interface are solid.

If the 

 LED is 

, the TRACER 64x0 is not able to detect an active Ethernet link on the particular 

10/100BaseT/TX interface. 

1.

Check all Ethernet cable connections to verify they are properly plugged in (making sure the tab on the 
connector snaps into place). 

2.

Connect the 10/100BaseT/TX interface to a “known good” Ethernet port to verify the TRACER port is 
functioning properly.

3.

Try another Ethernet cable.

RF errors can range from a nonviable microwave path to loose RF connectors.

Nonviable path conditions could be caused by physical obstructions such as buildings, mountainous terrain, 
trees, etc., as well as other physical limitations such as excessive path distances and in-band RF interference. 
These types of errors are remedied by performing a detailed line-of-site microwave path study to determine 
whether a microwave link is feasible for the terrain and environment under consideration.

If after performing a microwave path study the system is still not operational, ensure that the antennas are 
properly aligned. Note that alignment must be achieved in both elevation and azimuth for optimal link 
performance. The TRACER 64x0 can be used to aid in antenna alignment by looking at the real-time signal 
strength numbers or the 

 “fuel gauge” on the 

 or 

 menu pages or by 

measuring the DC voltage (relative to ground) at the 

 front panel test jack. Optimal antenna alignment is 

achieved by peaking the front panel 

 voltage or the 

 “fuel gauge” on the TRACER 64x0 

terminal display. Consult the ADTRAN TRACER Data Sheet included with the unit to verify that the actual 
receive signal level agrees with the calculated receive signal.

An 

 test point, located on the front panel, provides a DC voltage level (relative to the 

 test point) that 

corresponds to the amount of signal being received from the far end’s transmitter. The voltage at this test point 
can vary from approximately 0 to 5 VDC. An RSSI calibration sheet is shipped with the system to provide the 
installer a cross-reference between actual received signal level (in dBm) and RSSI voltage. This sheet is 
useful for verifying link budget calculations and ensuring proper equipment installation.

The logical troubleshooting flow presented in this section can be used to set up your TRACER 64x0 system or 
to diagnose a previously installed system. Please contact Technical Support at any stage during installation 
and/or troubleshooting if you require assistance.