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Discussion Starter · #1 ·
I have a ProScan 38" set which has built-in DTC-100. My programming source is Time Warner digital cable. HD channels look great (hbo east and west, Showtime) and the digital end of the spectrum (the other HBO and Showtime channels) looks good also. But on channels 2 thru 65 there is considerable video noise and on a couple of channels, ghosting. I was under the impression that in a digital situation like this, noise and ghosting would not be a problem. Someone set me straight - Is the problem with my cable signal or with my set?


Additional info - this is my replacement set. The original set did not exhibit these problems. Also, last time a cable guy was at my house the signal strength measured plenty strong. Any suggestions?
 

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Those are analog channels giving you problems, and I've found with my NYC Time Warner cable (SA2000 converter) that it's best to view digital NTSC channels with S-video, but analog cable channels with either a composite or RF cable converter output. For analog, this brings your set's comb filter into play. Wouldn't call the analog via S-video ghosty here...it's more like excessive noise and dot crawl (especially on horizontal colored lines). If you've really got ghosts, especially if you bypass the converter with a direct cable feed for analog only, that suggests a break somewhere down the cable line, or a really bad feed from the cable company. Can't explain the original set discrepancy.-- John


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STOP DVI/HDCP AND DFAST


[This message has been edited by John Mason (edited 07-01-2001).]
 

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I suspect you will find that your new set either does not have as good a analog tuner as your old set, or that the enhanced capabilities (like a line doubler) exaggerate the noise problem that was already there...


<rant on> http://www.avsforum.com/ubb/smile.gif All the cable companies are touting "digital" cable that does not even fully exist yet. They can not afford to spend the bandwidth for a second copy of all the channels thus the first "65" that you have problems with are the same analog garbage that has always been there. It is VERY VERY difficult to keep an analog signal noise and ghost free on a cable that is being bombarded with all kinds of junk (noise, weather, stress, age,other channels, you name it). Heck even FOX and UPN send out a poor signal to their affiliates (except those that are truly HD) they have all kinds of artifacts in them (NBC and ABC seem to understand this and at least here they have a great SD signal - CBS here is fully digital http://www.avsforum.com/ubb/smile.gif ). Some day 10 or 20 years from now, when analog signals are gone, we will be enjoying how great the signals are (if they don't compress them to death). <rant off>


There - I feel better now http://www.avsforum.com/ubb/smile.gif Oh, and the problem is the cable - good luck getting it fixed http://www.avsforum.com/ubb/frown.gif
 

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Discussion Starter · #4 ·
Thanks for the quick replies. I use rf for channels 2 thru 65, s-video for 200 and above and component for hd. Its the sa2000hd cable converter. The worst problems are at the lower end of the specturm, the local channels. No problems if I hook up a cheap 19" set. I guess the better set magnifies signal problems. I can get an acceptable picture if I turn the sharpness way down and use the set's noise filter, but it is a soft picture. Sounds like this is all I can do.


Are these problems eliminated with satellite dishes (assuming local channel availability)?
 

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Unfortunately going to Satellite just trades one set of problems for another. While the HD channels are great (and I love watching them), in order to fit so many channels in a small space (smaller than some cable outfits) they compress the heck out of the picture. This leads to banding, pixilization, and lost picture quality in general (although you won't see any "noise" per say). Like I said, in 10 or 20 years maybe we will have an acceptable picture http://www.avsforum.com/ubb/frown.gif
 

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Quote:
Originally posted by sh:
The worst problems are at the lower end of the specturm, the local channels.
Can't try it locally because of all the multipath problems (all channels are ghost-plagued), but with bad cable reception of local channels it's useful to compare OTA images versus cable. If you can demonstrate to cable reps, especially a supervisor, you're getting considerably better OTA reception of some channels, perhaps you can bring about some action.-- John




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STOP DVI/HDCP AND DFAST
 
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