User Manual
Table Of Contents
- Trademarks
- About this Manual
- Federal Communications Commission Radio Frequency Interference Statement
- Warranty and Customer Service
- Customer Service, Product Support Information, and Training
- 4205 System Description
- Microwave Path Engineering Basics
- Engineering Guidelines
- Network Turnup Procedure
- User Interface Guide
- Troubleshooting Guide
TRACER 4205 System Manual Section 6, Troubleshooting Guide
612804205L1-1A © 2002 ADTRAN, Inc. 53
RF LOW LED
If the RF LOW LED is ON (solid Red), it is an indicator that the received signal is within 10 dB
(approximately) of the minimum operable signal. This condition is typically indicative of a path 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.
3. Verify the RF signal path by verifying the antenna alignment.
4. Check the integrity of the cable plant.
5. Check the integrity of lightning arrestors.
LOS LED
If the LOS LED is ON (solid Red), it is an indicator that the TRACER 4205 is unable to detect a viable DS3
received signal from the connected DS3 equipment. This error may be due to a degraded signal or no
signal, or is may be caused by improper framing.
Recommended Actions:
1. Verify that the DS3 Coaxial cable is connected to the DS3 interface on the TRACER 4205.
2. Verify that the DS3 Out interface on the TRACER 4205 is connected to the transmit interface of the
DS3 equipment.
3. Verify that the DS3 In interface on the TRACER 4205 is connected to the receive interface of the DS3
equipment.
4. Verify the connections at the opposite end of the DS3 cable.
5. Verify that the framing mode (C-Bit or M13 parity) is the same for both the TRACER 4205 and the DS3
equipment.
LOF LED
If the LOF LED is ON (solid Red), it is an indicator that the TRACER 4205 is unable to detect a viable
framing pattern from the connected DS3 equipment. This error may be due to a degraded incoming signal
or improper framing coming from the attached equipment.
Recommended Actions:
1. Verify that the DS3 Coaxial cable is connected to the DS3 interface on the TRACER 4205.
2. Verify that the DS3 Out interface on the TRACER 4205 is connected to the transmit interface of the
DS3 equipment.
3. Verify that the DS3 In interface on the TRACER 4205 is connected to the receive interface of the DS3
equipment.
4. Verify the connections at the opposite end of the DS3 cable.
5. Verify that the framing mode (C-Bit or M13 parity) is the same for both the TRACER 4205 and the DS3
equipment.