ADTRAN 4106 Plan A, 4206 Plan A Overview, LED Indicators PWR LED, Tst Led, RF Down LED

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Section 6 Troubleshooting Guide

TRACER 4106/4206 System Manual

 

 

1.OVERVIEW

This troubleshooting guide provides recommended actions for various conditions of the TRACER 4106/4206 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 4106/4206 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 4106/4206 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 1A, 250 V (2-inch) slow-blo fuse.

TST LED

The TST LED will blink once (amber) during the power-up sequence 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 4106/4206 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 receive path from the remote TRACER 4106/4206.

Recommended Actions:

1.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.

2.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 48 for more details.

3.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.

4.Check the RF coaxial cable connection.

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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© 2004 ADTRAN, Inc.

612804206L2-1A

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Contents Tracer 4106/4206 About this Manual TrademarksTo the Holder of the Manual Revision History Safety Instructions Save These Important Safety InstructionsFCC-Required Information Radio Frequency Interface StatementFCC Output Power Restrictions Exposure to Radio Frequency FieldsRepair and Return Pre-Sales Inquiries and Applications SupportTraining Installation and Maintenance SupportPost-Sale Support Table of Contents Table of Contents Tracer 4106/4206 System Manual System Description Features and Benefits Configuration and ManagementSystem Overview OperationalReceiver Power Line-of-SightReceiver Sensitivity Antenna Information Other ConsiderationsADTRAN, Inc LINE-OF-SIGHT TerminologyDecibels Calculating the Fade MarginReceiver Power Transmitted Power PT Antenna GainSystem Losses L Carrier Wavelength λPath Distance d Path Loss LP Typical Coaxial Loss for Common Cable TypesReceiver Sensitivity T1 PortsAntenna Information Antenna AlignmentTracer Rssi Test Points Antenna Beam PatternsFresnel Zones, Earth Curvature, & Antenna Heights Terrain Terrain Factor Description Other ConsiderationsPath Availability Values normally used are listed below Climate Climate Factor DescriptionAt-A-Glance Specifications Reviewing the Front Panel DesignEquipment Dimensions Power RequirementsReviewing the Front Panel Design Rssi Monitoring InterfaceReviewing the Tracer 4106/4206 Rear Panel Design Name Connector Description RS-232 Connection DB-25 Terminal UseRear Panel Description RS-232 Connection PinoutTracer 4106/4206 DCE to Personal Computer DB-9 Tracer 4106/4206 DCE to Terminal DTE Diagram DB-25RS-232 Connection Modem Use Tracer 4106/4206 DCE to Modem DCE DB-25 T1 Interface Connector PinoutT1 Connections RJ-48C Alarm Contacts Plug-In Terminal Block DC Power Connection Plug-In Terminal BlockAntenna Interface N-Type connector FuseAT-A-GLANCE Specifications Hardware Description Specification TransmitterVT100 Terminal Interface Engineering Guidelines Tracer 4106/4206 System Manual Network Turnup Procedure Unpack and Inspect the SystemContents of Adtran Shipment IntroductionTools Required Unpack and Inspect the SystemCustomer Provides Channel SelectionGrounding Instructions Instructions for Rackmounting the Tracer 4106/4206 Supplying Power to the UnitMounting Options Connecting the T1 Interface Inch Rackmount IllustrationUser Interface Guide Menu DescriptionsNavigating the Terminal Menu Terminal Menu WindowNavigating using the Keyboard Keys Password ProtectionTerminal Menu and System Control To do this Press this keyMenu Descriptions Elapsed TimeContact Information RF StatusT1 Status Error/Alarm Only Rx PowerTx Power Remote Tracer StatusMain Menu Tracer System Options Tracer System Options RF Bandplan Receiver Sensitivity for the Tracer 4106/4206 Receiver Sensitivity Active BandwidthResets all system error counters for the Tracer 4106/4206 T1x Status/Configuration/Loopback T1 Interface AlarmsT1X STATUS/CONFIGURATION/LOOPBACK T1X Line Build OUT T1 Remote Link Loopback T1X Performance History Installing/Troubleshooting the Tracer Hardware OverviewLED Indicators PWR LED OverviewTST LED RF Down LEDT1 Interface Alarm LEDs RF LOW LEDRF Errors STEP-BY-STEP TroubleshootingINSTALLING/TROUBLESHOOTING the Tracer Hardware Installing/Configuring T1 Hardware