Originally Posted by jimstick
Thanks again, Don. You may be right about the antenna issue, as I do have mine in the attic, and there is a duct close by. I will try to reposition it for a better signal on 19-1, and see if that makes a difference. That said, last night, I watched 19-1 all the way through Doctor Phil, Judge Judy, News, Survivor, CSI, and Shark. I got out my stopwatch and I timed the intervals between picture breakups, and found that it happened every 18-21 seconds the entire 8 hours I watched. It is very evident while watching with the DVR, while only noticable about one out of every ten times without the DVR. I also watched without DVR a while until I noticed a picture breakup, and then went to the DVR and rewound to the spot where I noticed the breakup, and it was at the exact same spot during the show, only much more noticable on the DVR.
I searched my house for anything that sends out an RF signal and could not stop it, though it might be my neighbor's, but it seems unlikly this is it due to it only being evident on one channel.
It only happens on 19-1, not on ANY other channel.
Glad to see you can time these sound/pix breakups. I recorded CSI last night and the DVR shows just the same problems I saw visually when it was live. My sound/pix problems are much farther apart than 18-21 seconds you see, which suggests you may have a combination of problems.
I too am not sure the sound/pix problems are due only to KEPR-HD, so lets compare notes. I went back through the DVR recording of CSI and timed the problems with a stopwatch, hitting the pause on both the stopwatch and remote( one in each hand) to log each event. To get a common time zero I started the stopwatch a little after CSI started exactly at the time the blue HD logo in the left bottom corner saying "presented in HD 5.1" disapppeared. This is the start of the stopwatch and the times below are min: sec to each event ( I had a short reaction time to hit the pause on both watch and remote, so there may be a slight difference of a second or so in my timing vs. yours. The event varied from a fraction of second duration to a couple seconds breakup at about these times on the stopwatch ( with the end of the HD 5.1 blue logo as time zero):
00:41 sound drop/picture breakup in HD program
02:01 sound drop/picture breakup in HD program
02:07 single line of pixels out flash (minor) in HD program
02:25 single line of pixels out flash (minor) in HD program just before titles
05:38 sound drop/picture breakup in SD commercials just prior to Numb3ers promo
07:38 sound drop/picture breakup in HD
09:19 white line flashes on screen
10:52 sound drop/picture breakup
11:26 multiple white lines in lower half screen flash
17:18 sound drop/picture breakup
17:37 sound drop/picture breakup during SD clothing commercial
17:50 sound drop/picture breakup during SD commercial
Stopped logging, but this same pattern continued for the rest of CSI.
I would be very interested if these same events are on your DVR too. Other than these, any others were too minor for me to see.
Digital receivers have an error correction system to prevent these type of problems so some receivers may do better than others. Also with regard to your attic and RF sources, it is the reflection of the KEPR-HD signal off some some metal of the exact same KEPR-HD digital data, displaced a fraction in time (like an echo) that confuses the receiver into which data stream (primary or reflection) to lock on to, causing a dropout. It may be that KEPR's microwave link is having the same type of problem which they then broadcast to all of us or a component introducing errors. If so we should all see the dropout at the same time. If it our own antenna, each of us could get problems at different times.
If you move your antenna, it has been reported that if it is multipath problems, even moving even a few inches or a few feet produces a change in performance and signal strength.
I will be interested in what timeing your CSI recording shows. I don't have my outdoor antenna pointed exactly towards KEPR since I need to point more East to pick up KFFX-DT. Thus I am not claiming that mine is perfect reception for others to compare to-I could have problems too. However since there have been a number of days in the past with perfect KEPR-HD reception, and other CSI episodes that were received perfectly with my antenna I don't think it is my antenna causing what I saw last night.