Quote:
Originally Posted by Interesting Ian
Hi,
Many of my channels are also pixelated including 2 of the new HD channels FX and mutvHD. Are these values different for each channel?
On SNR it says 24.0dB, 32.0dB, 29.0dB
Do all these have to be above 30, or just one?
AGC says -16dBmV, -11dBmV, -13dBmV I have no idea how these figures relate to a percentage value.
Pre RS errors says 0,0, 11 per 0.5s
Post RS Errors says 0,0,0 per 0.5s
So anything wrong with these figures? Probably give Virgin a ring.
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You have a slightly different display to me so I'm guessing you have a different STB. I have a Pace Di400-N V Box STB. What's yours?
I'm not exactly sure what figures you're quoting. Can you elaborate? Are they the three sets of figures for the three new HD channels? Maybe you can list BBC HD and an SD channel (e.g. BBC One) as well for comparison.
The figures shown apply to the channel you are currently watching. Each channel will differ as they come down the co-ax on different frequencies and are subject to different levels of interference and attenuation.
An SNR of 32.0dB is good, 24.0dB is very bad. The AGC value of -11dBmv sounds good and -16dBmV sounds bad. The Pre RS Error value of 11 is a relatively small (but not perfect) number of correctable errors and, at the time of the snapshot, there were no unrecoverable Post RS Errors so, in theory, you should not be having any pixellation. However, it is a snapshot and you have to go out of Settings and back in again to refresh periodically.
Have you checked and tightened all of those connectors?
One time I discovered a break in the centre core of a short patch cable from my broadband splitter to the STB. Most channels were fine 'jumping' the gap in the cable through capacitive coupling. Others were very badly affected to the point of generating an error screen rather than just showing a pixellated picture. When I wiggled the cable it improved things so I checked it with a meter and found a break about a third of the way along.
Some time later I was still having intermittent problems with selected channels due to poor signal levels so VM replaced the amplifier in the green box on the street corner.
I have noticed that hot weather often coincides with this kind of problem and, as my STB is kept quite cool, I think it might be the green box on the street corner but check your STB isn't overheated.
I still get occasional problems early in the morning with Discovery, History etc. but I haven't reported it again yet as it's not a major issue.
Finally, if I am getting pixellation I sometimes lift the front of the STB up a couple of centimetres and drop it gently. I said gently! This usually works and indicates a possible loose connection or solder joint inside the box. The RF cable also gets a giggle from this operation but I'm fairly sure that the cable and it's connectors are in good shape. I've only had this box about nine months as my original older model Pace box failed after many years of faithful service.
Apologies for the lenghty post but as more channels are added, especially HD channels, I envisage more pixellation problems and 1202 errors 'Coming Soon to Virgin TV'.