Adtran TRC4206L1 Manual Do Utilizador
Section 6, Troubleshooting Guide
TRACER 4206 System Manual
64
© 2002 ADTRAN, Inc.
612804206L1-1A
Blue Alarm
A remote alarm (alarm indication signal or AIS) is generated by the attached equipment. The root
cause must be determined at the attached equipment. A typical cause of a blue alarm is a lack of input
to a CSU.
cause must be determined at the attached equipment. A typical cause of a blue alarm is a lack of input
to a CSU.
Recommended Actions:
1. Verify the input to any attached data equipment.
BPV
Bipolar violations (BPVs) indicate an improper configuration or faulty wiring.
Recommended Actions:
1.
Verify the TRACER 4206 unit and the attached equipment are configured for the same line coding
(B8ZS or AMI).
2.
Verify the cable connections for the T1 interface are solid.
3.
RF ERRORS
RF errors can range anywhere from a non-viable microwave path to loose RF connectors.
Non-viable path conditions could be caused by physical obstructions such as buildings, moutainous 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-sight microwave path
study to determine whether or not a microwave link is feasible for the terrain and environment under
consideration.
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-sight microwave path
study to determine whether or not 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 4206 can be used to aid in antenna alignment by looking at the RSSI
submenu. Optimal antenna alignment will correspond to the maximum number of RSSI bars on the
TRACER 4206 terminal display.
properly aligned. Note that alignment must be achieved in both elevation and azimuth for optimal link
performance. The TRACER 4206 can be used to aid in antenna alignment by looking at the RSSI
submenu. Optimal antenna alignment will correspond to the maximum number of RSSI bars on the
TRACER 4206 terminal display.
4.
STEP-BY-STEP TROUBLESHOOTING
The logical troubleshooting flow presented in this section can be used to set up your TRACER 4206
system, and also to diagnose a previously installed system. Please contact ADTRAN Technical support at
any stage during installation and/or troubleshooting if you require assistance.
system, and also to diagnose a previously installed system. Please contact ADTRAN Technical support at
any stage during installation and/or troubleshooting if you require assistance.
5.
INSTALLING/TROUBLESHOOTING THE TRACER HARDWARE
1.
Perform a detailed path profile for each TRACER 4206 microwave link. A thorough path study can
be used to estimate signal power budgets, fade margins at each receiver, identity potential
line-of-site obstacles, properly size antenna dishes, and determine minimum antenna dish heights
above the earth.
be used to estimate signal power budgets, fade margins at each receiver, identity potential
line-of-site obstacles, properly size antenna dishes, and determine minimum antenna dish heights
above the earth.
2.
Setup all of the TRACER hardware on a work bench. It is also recommended that the actual
cables to be used in the permanent installation be used in the work bench setup. A rigorous work
bench “simulation” of the link will help you alleviate and avoid time-consuming errors.
cables to be used in the permanent installation be used in the work bench setup. A rigorous work
bench “simulation” of the link will help you alleviate and avoid time-consuming errors.