Originally Posted by Jeff_W
I flipped to diagnostics: signal stretch is bouncing between 93 and 100 with SNR of 35 dB.
So, what does that mean?
I recently had a similar episode on one of my Tivos. The pic and signal would be good on one day and bad on another, also with erratic signal levels. It also affected 3 HD channels that share the same QAM. I never have traced it down because I rarely watch those channels. Does this affect all channels or only certain ones?
The symptons you describe could also be caused by a failing hard drive. But I thing we can safely rule that out since it affects 2 different Tivos.
Too much signal is reported to also cause problems. Since you are hitting 100, you have no way of knowing if it is really hitting 125 or more. Also, when you say bouncing, do you mean the level changes radically over the course of a few seconds or are you talking about a slower bounce.
I think I would try to attenuate the signal using some splitters or actual cable attenuators to see if you could get the signal down to where it is not peaking at 100.
I also liked unitron's suggestions. I believe you can also look at corrected and uncorrected errors in the diagnostics. While I am no expert on this, I believe that if the glitches are actually embedded in the signal you receive (meaning the cable company is sending out a bad signal) you won't see uncorrected errors in the diagnostics. However, if the signal they are sending is ok and you are having reception/signal level problems, then you would see uncorrected errors.
Hopefully, someone who understands this better than I can chime in.