ADTRAN 12804108L1B Instrukcja Obsługi Pobierz pdf (Strona 56)

Section 6 Troubleshooting Guide TRACER 4108/4208 System Manual

1. OVERVIEW

This troubleshooting guide provides recommended actions for various conditions of the TRACER 4108/4208

system. The status LEDs (located on the front panel of the unit) provide information to help determine the

necessary troubleshooting action. Recommended actions for resolving possible status LED indicators are

contained in this guide.

2. LED INDICATORS

PWR LED

If the PWR LED is not ON and solid green, it is an indicator that the TRACER 4108/4208 is not receiving

adequate DC power.

Recommended Actions:

1. Verify that the power source is delivering between 21 and 60 VDC.

2. Check the polarity of the power connection (referenced to ground) of both the TRACER 4108/4208 unit

and the power source. See DC Power Connection (Plug-In Terminal Block) on page 31 for details on

power supply connections.

3. Check the internal fuse. The fuse is accessed from the rear panel of the unit. If this fuse is open,

replace with a 2 A, 250 V (2-inch) slow-blo fuse.

TST LED

The TST LED will remain ON (solid amber) during power-up to indicate a self-test is in progress. If the TST

LED is blinking or remains

ON after 10 seconds, this indicates that the TRACER 4108/4208 unit has failed

the self-test. This is an internal failure, and ADTRAN technical support should be contacted.

RF DOWN LED

If the RF DOWN LED is ON (solid red), it is an indicator that there is a problem with the RF link to the

remote TRACER 4108/4208.

Recommended Actions:

1. Check the RF coaxial cable connection.

2. Measure the RSSI voltage and consult the RSSI Calibration sheet included with the unit. If the voltage

level corresponds to a received signal power level that agrees with the calculated receive signal level, go

to Step 8.

3. Verify that one end of the link is configured as Plan A and the other end as Plan B, and that both ends

have the same bandplan number (ex. A1 and B1). See >TRACER System Options > RF Bandplan on

page 48 for further details.

4. Verify that both ends of the link are configured for the same number of active T1 ports. See >TRACER

System Options >Active T1 Ports on page 49 for more details.

5. Verify that the antenna polarization is the same at both ends of the RF signal transmit and receive path.

6. Verify the RF signal path is clear.

7. Check the integrity of the lightning arrestors.

8. Check for possible interference at both ends of the link. If necessary, change polarization and/or

bandplans at both ends.

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ADTRAN 12804108L1B Instrukcja Obsługi Strona 56