Adtran TRC6410L2X Manuale Utente
TRACER 6000 Series Integrated System Manual
Section 8 Troubleshooting Guide
612806420L1-1D
Copyright © 2005 ADTRAN, Inc.
127
CRC
CRC errors indicate that the receiver is unable to synchronize to the CRC-4 frame pattern of the received
E1 signal.
E1 signal.
Recommended Actions:
1.
Verify the TRACER 64x0 unit and the attached equipment are configured for the same signaling
(M
(M
ULTIFRAMED
, U
NFRAMED
, or F
RAMED
).
2. Verify the cable connections for the E1 interface are solid.
LAN LEDs
If the
LAN
LED is
OFF
, the TRACER 64x0 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).
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.
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.
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
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
R
X
P
OWER
“fuel gauge” on the
S
YSTEM
S
TATUS
or
S
YSTEM
O
PTION
menu pages or by
measuring the DC voltage (relative 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 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.
receive signal level agrees 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.
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 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.
to diagnose a previously installed system. Please contact Technical Support at any stage during installation
and/or troubleshooting if you require assistance.