[protivakid]

I live in MA where NBC just switched from WHDH to NBC Boston as of Jan 1st. It is being broadcast over 3 different towers and the one I can get is WMFP (a mirror of WBTS) UHF 18 Virtual 60-5.

This channel works fine on 3 of the 4 TV's in my house which are 1080p. However, with my oldest tv, a 720P Sony kdl-32l4000, I see a lot of stuttering. It does not seem to be a reception issue, it's more of a lag like the video slows down and then quickly tries to catch up. Similar to watching an HD movie on an old pc that is not powerful enough. This happens every few seconds. The odd thing is it does not happen with every show, just some shows and commercials while others are fine

I tried to make sure all image processing options were turned off such as "cinemotion" and such but that did not help. Is there a chance the station is broadcasting some shows in 1080p and my 720p is just lagging trying to downscale?

I can sometimes get another NBC station (WJAR) and when I flip to this one the same show will display just fine. It's only the NBC Boston station that I have this issue with.

I have seen a few others having a similar issue when google-ing but no real steps to solve it. Any help is appreciated. Hoping it's not time for this TV to be retired.

 

[Otto Pylot]

If the station in question works well for 3 of the 4 tv's in your house, and they are all being fed from the same antenna source, I'd lean towards the tuner in the affected tv not being able to compensate for any anomalies in the broadcast signal (1080p vs 720p, interference, etc) that the other tv's can.

 

[DrDon]

Moving to the Displays section as this appears to be a set issue.

http://www.avsforum.com/forum/25-hd...elevision-sets-go-displays-area-not-here.html

You might also see this post: http://www.avsforum.com/forum/45-local-hdtv-info-reception/28454-boston-ma-ota-565.html#post49476529

Were I you, I'd at least contact the CE of the station and let him know what you're seeing. You don't appear to be alone.

 

[rabbit73]

It is possible that the tuner in the KDL32L4000 isn't as sensitive as the tuners in the other TVs or maybe the signals coming to that TV are weaker because of a longer coax run. It might make a difference with marginal signals.

The tuner in my KDL22L5000 isn't quite as sensitive as the tuner in my 32R400A. Can you switch TV locations to see if it is the TV or the signals?

To test tuner sensitivity, I use an inexpensive adjustable attenuator and a splitter to see which tuner drops out last as I make the signals weaker.
http://www.avsforum.com/forum/186-c...st-transition-converter-box.html#post48473881

If it is the signals and not the TV, we might want to look at your tvfool signal report:
http://www.tvfool.com/index.php?option=com_wrapper&Itemid=29

 

[rabbit73]

WMFP has NBC scaled to 720P:
http://www.rabbitears.info/market.php?request=station_search&callsign=wmfp

https://en.wikipedia.org/wiki/WMFP

Simulcast of WBTS-LD1/NBC; maps to WNEU's virtual channel; currently scaled to 720p (rather than being presented in its native 1080i) resolution

https://en.wikipedia.org/wiki/WNEU

 

[rabbit73]

Your report from
http://forum.tvfool.com/showthread.php?t=16180

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id=dfafc2e7234cbc

 

[protivakid]

Here is a video showing the issue with the Sony TV's diagnostic screen up

 

[rabbit73]

Thank you for the video with the diagnostics screen showing; very helpful.

I think you are correct; it doesn't look like a weak signal problem.