Gigabit QAM Modulator Model D9479 Hardware Installation and ...

Troubleshooting Alarm MessagesLCDDescriptionInput (1-5)FIFO overflowSee also Input(1-5) packetswere dumpedInput (1-5)loss of inputsignalInput (1-5)MPEGcontinuityerrorInput (1-5)MPEGTransportErrorAlarmLevelProbable CauseMinor First-in first-out (FIFO) overflowoccurred and packet data has beenlost. This indicates one or more ofthe following conditions:• Too many sessions definedfrom the DNCS for the GQAM• The data rate as defined fromthe DNCS for the GQAMsession is too low, which alsomeans that the data rate of theASI input to the GQAM is toohigh• Hardware problem• Incorrect modulation modeMajor No signal. This indicates one ormore of the following conditions:• An upstream device thatprovides input to the GQAMhas failed or is offline• A cable has been disconnectedMinor MPEG continuity error counter; oneor more MPEG packets have beendroppedMinor MPEG transport error indicatorcounter; error occurred in theheader of the MPEG packetCheck and Correct• Reduce the data rate ofinput to the GQAM bydoing the following:– Reducing amount ofincoming data– Reducing amount ofdata added to thestream– Increasing themodulation mode• Verify and correct sessionrate targets and thresholdvalues• Contact Cisco Services• Check for loose or brokenDVB ASI or GbE cableconnections• Check that DVB ASI andGbE outputs of upstreamdevices are active• Run the Doctor Report totroubleshoot networkconnectivity issues• Contact Cisco Services• Check one or moreupstream devicesconnected to the GbEports or the DVB ASIinput ports• Contact Cisco Services• Check one or moreupstream devicesconnected to the GbEports or the DVB ASIinput ports• Run the Doctor Report totroubleshoot networkconnectivity issues• Contact Cisco Services78-745431-01 Rev E 97