Kryptview a780

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  • cavanagh
    Junior Member
    • Dec 2012
    • 25

    #16
    Any idea where the qam setting is?

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    • cavanagh
      Junior Member
      • Dec 2012
      • 25

      #17
      Any idea where the setting is?

      Comment

      • TheCoder
        DK Veteran
        • Jun 2011
        • 693

        #18
        Originally posted by cavanagh
        Any idea where the setting is?
        Not sure there is one, the box should get the network info regarding all transducer frequencies and modulation modes from the broadcast NIT tables. Thats why its important you set the correct NetId as per your subbed box.

        The QAM256 modulation mode is substantially more fussy about signal levels than the QAM64 mode. This is because there are now 256 potential quadrature phase states per bit rather than the previous 64 phase states so noise becomes much more of an issue. Whereas a signal error of >10% is tolerable at QAM64, it has to be less than around 3.5% at QAM256. Any greater than 3.5% and your bit error rate (BER) will start to rise at a rapid rate towards an unusable signal condition.

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        • cavanagh
          Junior Member
          • Dec 2012
          • 25

          #19
          So is there ne way to fix this problem or has my k/v gone for good?

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          • TheCoder
            DK Veteran
            • Jun 2011
            • 693

            #20
            Originally posted by cavanagh
            So is there ne way to fix this problem or has my k/v gone for good?
            If your problem is related to timing jitter noise causing qam256 decode errors then only VM can fix the problem. If it is the problem then you'll likely see similar problems on your subbed box, in which case you give vm a call and get them to sort it.

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            • cavanagh
              Junior Member
              • Dec 2012
              • 25

              #21
              Dont hav ne probs with the subbed box thats what is doin my nut in

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