Digital Cable signal strength

Last post 09-16-2009 10:28 PM by ThorinMan. 5 replies.
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  • 01-24-2008 7:02 AM

    • SeanG
    • Top 500 Contributor
    • Joined on 07-13-2005
    • Member

    Digital Cable signal strength

    Hi everyone.  I was just troubleshooting some coax cabling issues in my house (previous owner had splitters all over the place) and was wondering what other DCT enabled VMCs are getting.  My Signal to Noise Ratio (SNR) is 29 and Signal Level (dBmV) is 43.  Does this sound about right?
  • 01-24-2008 8:18 AM In reply to

    • arandazz
    • Top 500 Contributor
    • Joined on 08-27-2007
    • Lansdale, PA, USA
    • Member

    Re: Digital Cable signal strength

    Those numbers appear to be an analog signal strength. Excellent digital signal should be 34 SNR and 0 dBmV.

    My analog signals are 28 SNR and 40 dBmV and my digital signals are 34 SNR and -7 dBmV; everything works wonderfully.

  • 01-24-2008 9:15 AM In reply to

    • SeanG
    • Top 500 Contributor
    • Joined on 07-13-2005
    • Member

    Re: Digital Cable signal strength

    arandazz:

    Those numbers appear to be an analog signal strength. Excellent digital signal should be 34 SNR and 0 dBmV.

    My analog signals are 28 SNR and 40 dBmV and my digital signals are 34 SNR and -7 dBmV; everything works wonderfully.

    Ok.  I just got this Cablecard VMC and haven't scheduled Cablevision to come out yet to do the cablecard install.  I was hooking it all up when I noticed a huge difference in signal strength between two of the tuners.  That prompted me to start tracing out the coax cabling in the house and correct a splitter issue.  Now I get the numbers above for both tuners.  Hopefully digital will be just as good.

    BTW, I thought I remember seeing that one could http to the DCT to get all sorts of diagnostics info but can't find it anywhere.  Does anyone know?

  • 01-24-2008 9:46 AM In reply to

    • arandazz
    • Top 500 Contributor
    • Joined on 08-27-2007
    • Lansdale, PA, USA
    • Member

    Re: Digital Cable signal strength

    Your tuners should be listed in: start button -> network. Double clicking on the icon will bring up the tuner webpage. All the diagnostic info will be in there. On the "card" tab the pairing links will only show up when a cable card is inserted and the status shows "inserted." If you insert a card status shows "error" the pairing links will not show up; this happened to me and was only resolved by restoring my PC and two new cablecards.

    Good luck with your install.

  • 10-22-2008 8:19 PM In reply to

    Re: Digital Cable signal strength

    Odd, I have finally figured out that one of my two SA Cablecards fluctuates wildly in signal level from about -6 DbMA to around 36 DbMV and back and forth.  This "hot" signal made it unpredictable and if and when it is hot it will not tune to a channel with out the no signal error, or record a second show if I have two scheduled at the same time...

    I switched the two cablecards from one tuner to the other and the "hot" signal followed the suspected tuner with that card.  So at this point I suspect the card and I have scheduled the cable company to come out and swap out the card with a new one.  Anyone had this happen and end up with a "bad" cablecard?
  • 09-16-2009 10:28 PM In reply to

    Re: Digital Cable signal strength

    Did a new cablecard fix the problem?
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