Adtran TRC6420 Manual Do Utilizador
Section 8 Troubleshooting Guide
TRACER 6420 System Manual
106
Copyright © 2005 ADTRAN, Inc.
612806420L1-1A
BPV
Bipolar violations (BPVs) indicate an improper configuration or faulty wiring.
Recommended Actions:
1. Verify the TRACER 6420 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.
LAN LEDs
If the
LAN
LED is
OFF
, the TRACER 6420 is not able to detect an active Ethernet link on the particular
10/100BaseT/TX interface.
Recommended Actions:
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.
3.
RF ERRORS
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.
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 6420 can be used to aid in antenna alignment by looking at the
properly aligned. Note that alignment must be achieved in both elevation and azimuth for optimal link
performance. The TRACER 6420 can be used to aid in antenna alignment by looking at the
R
X
P
OWER
“fuel gauge” on the System Status or System Option menu pages or by measuring the DC voltage (relative
to ground) at the
to ground) at the
RSSI
front panel test jack. Optimal antenna alignment is achieved by peaking the front
panel
RSSI
voltage or the
R
X
P
OWER
“fuel gauge” on the TRACER 6420 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.
with the calculated receive signal.
An
RSSI
test point, located on the front panel, provides a DC voltage level (relative to the
GND
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.
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.
4.
STEP-BY-STEP TROUBLESHOOTING
The logical troubleshooting flow presented in this section can be used to set up your TRACER 6420
system, and also to diagnose a previously installed system. Please contact 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 Technical Support at any stage
during installation and/or troubleshooting if you require assistance.