ADTRAN TRACER 5045 - Manual (Page 53)

TRACER 5045 System Manual Section 6 Troubleshooting Guide
612805045L1-1B © 2004 ADTRAN, Inc. 53
RF LOW LED
If the RF LOW LED is ON (solid red), the received signal is approaching 0 V of RSSI. This condition is
typically indicative of a path or installation problem.
Recommended Actions:
1. Verify the far-end transmitter power setting is the value that the link planning budget allows.
2. Check all coaxial cable connectors for solid connections. Check for water and corrosion around any of
the connectors. If water is apparent in the coaxial connectors, replace the coaxial cable and the
connectors, making sure to properly weatherproof the replacements.
3. Verify the RF signal path by verifying the antenna alignment.
4. Check the integrity of lightning arrestors.
LAN LEDs
If the LAN LED is OFF , the TRACER 5045 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, 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-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 5045 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 RSSI front panel test jack. Optimal antenna alignment is achieved by peaking the front panel
RSSI voltage or the Rx Power “fuel gauge” on the TRACER 5045 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 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.