User's Manual

TRACER 2xT1 User’s Manual
61280003L2-1B
Section 4 Troubleshooting
46
Preliminary
Recommended Actions:
1. Check the RX power using the VT-100 user interface or RSSI voltage.
2. Check the far-end transmitter for operation and proper transmit power.
3. Check the RF path using a spectrum analyzer or RSSI voltages for proper alignment. Have
path professionally re-aligned and check system path engineering.
4. Check the antenna feedhorn and all outdoor connections for water.
5. Verify both ends have same antenna polarization.
6. Change the frequency of one radio through the VT-100 user interface or front panel button.
7. Set both units to the same PN code.
8. Check all connections between the BBP, the RFC, and the antenna.
9. Check the IF and RF cables for shorts.
10. Check connections inside the mastmount or rackmount RFC.
11. Replace the RFC.
ES Values in T1 Status Menu
This value indicates the number of Errored Seconds in the T1 data stream.
Recommended Action
Possible Cause (see list below)
• In an AMI-coded T1, a BPV or frame bit error has occurred. .................... 1
• In an ESF-coded T1, a BPV or CRC error has occurred............................. 1
Recommended Actions:
1. Check the T1 signal with a BERT test set to determine origin of error.
SES Values in History Menu
This value indicates the number of Severely Errored Seconds in the T1 data stream.
Recommended Action
Possible Cause (see list below)
• In an AMI-coded T1, 1544 BPVs or 8 frame bit errors have occurred. ..... 1
• In an ESF-coded T1, 1544 BPVs or 320 CRC errors have occurred. ......... 1
Recommended Action:
1. Check the T1 signal with a BERT test set to determine origin of error.
I M P O R T A N T
If problems persist after you have followed the Recommended Actions, contact ADTRAN Technical
Support at [phone].