Help in S.E.Va.

[JET4]

Antenna was put up after new roof.New roof around March, Antenna November.
Using the AD ATT-1 attenuator. Will go back up in attic and try again.
Antenna using is Channel Master CM-4221HD
TV- Sony XBR-65X850D. TV is new bought mid November. Don't know if old TV worked or not. Still had cable TV for about a week after new TV.
Have not tried another TV but will do so today.Will also do the double rescan today.
Thanks again for your help.
Also did you get my Private Message with my address not sure if I did that right.

[JET4]

Also if outside antenna is prefered than which model antenna is best?
Also have a Channel Master DVR+ coming.Wife wants to record a couple of shows on PBS.
Thanks again
Only hooked up to one TV

[JET4]

Did the double rescan and stayed the same.
Tried another Tv- 32" Panasonic and that also was the same.
Also did the double rescan on the 32" TV
Thanks again

[rabbit73]

Thank you for doing some more tests to eliminate some possibilities.

Tried another Tv- 32" Panasonic and that also was the same.
Also did the double rescan on the 32" TV

I want to be sure that I understand the results of your tests. You seem to say that the Sony AND the Panasonic both can get 49.1 but not QVC (49.5) and HSN (49.6).

They don't come in good at all.

Does that mean there is no signal at all for 49.5 and 49.6 or does that mean there is a signal, but it is poor? Poor video quality or poor signal strength with pixilation and picture freeze?

If you mean that there is a signal for 49.5 and 49.6, but it doesn't look as good, then it could be because of the difference in video signal quality that is transmitted. 49.1 is transmitted in 720p video, but 49.5 and 49.6 are transmitted in 480i which is not as sharp, especially on a 65" screen.
http://www.rabbitears.info/market.ph...&callsign=wpxv

CBS broadcasts the best video quality, 1080i
http://www.rabbitears.info/market.ph...&callsign=wtkr

[JET4]

There is a signal on 49.5 and 49.6 but it's poor video quality with pixilation. The picture does not freeze?

[rabbit73]

Also did you get my Private Message with my address not sure if I did that right.

Sorry, it did not show up in my PM inbox. Please try again. Click on my username at the left side of my post. In the drop down menu click on Send a private message to rabbit 73. This will bring up a form with my username already listed as Recipient. Enter your message and click on Submit Message. To check if it was sent, go to your Sent Items folder.

[rabbit73]

There is a signal on 49.5 and 49.6 but it's poor video quality with pixilation.

If it has pixilation, that probably means weak signal, which is a surprise considering how strong the signals are on your report. That would mean there is something wrong with your antenna system, or there is something blocking the signals on the way to your antenna.

Your Sony has a Diagnostics screen for the signals. Can you record what the readings are for your channels?
https://us.en.kb.sony.com/app/answer...831/c/65%2C66/

https://us.en.kb.sony.com/app/answers/detail/a_id/48446

https://docs.sony.com/release/hyperl..._ver_1.0.7.pdf p17

https://docs.sony.com/release/hyperl..._ver_1.0.7.PDF p2 Digital Broadcast

Digital Broadcast
channels do not
look good

Weak signal, Or Antenna
not positioned for best
reception.

Use the remote control to select the Digital Broadcast
channel with poor reception, then press the Home
button and select Help‐>Signal Diagnostics, several
parameters regarding the broadcast signal are shown. If
the Signal‐to‐Noise ratio is outside the range of between
19 & 35 dB, the broadcast signal is too weak, or the
antenna may need to be repositioned for best reception.
If the signal is too weak and adjusting the antenna does
not improve the reception, a more sensitive antenna, or
an external RF amplifier may help.

[rabbit73]

Do you get WVEC 13 ABC OK?

[JET4]

Channel 13.1 comes in very good. Went back to 49.5 and 49.6 and the picture is " fuzzy". Not Pixilating. You can make out the pictures but after looking at it a few minutes I think I'd get a headache. Lol.
( more like a double picture), will try PM again
Thanks

[JET4]

signal diagnostic test:
Physical channel-46
Freg (KHZ) - 665000
Modulation - 8VSB
Status - lock
Errors - 0
SNR ( db) 294/311
Ran the test twice on channels 49.5/49.6. That's why two numbers on SNR (db)

[JET4]

Would a better antenna work ? what would be a more sensitive antenna ? I'll move it out side if that will work.

[rabbit73]

The tvfool site has been down since Sunday, so I haven't had a chance to answer. I was about ready to call you, but I can answer now.

Would a better antenna work ? what would be a more sensitive antenna ? I'll move it out side if that will work.

Thanks for the signal readings; very helpful. I don't think a better antenna will help, although you are welcome to experiment. The signal readings indicate a good signal with SNR from 29.4 to 31.1 dB.

I think what you have is the Big Screen Problem. Not too many years ago, we thought a 21 inch TV had a big screen, then it was 32 inch, then it was 40 inch, and now it is 65 inch. When the picture gets larger, the imperfections also get larger to the point that we can't ignore them.

To make matters worse, when a channel adds a lot of sub channels, they have to reduce the resolution from 1080i to 720p, and then to 480i in order to fit them all in one 6 MHz wide channel.

And then to make the picture quality even worse they compress the signal to squeeze yet another sub channel in. This is what ION has done.

I connected an antenna to my 32 inch Sony TV to receive ION at this location. I asked my wife to look at 49.5 and 49.6. She said that the picture definition was not acceptable; a woman wants to see the detail in the jewelry and clothing.

I then connected the TV to Cox cable to show my wife what 1080i HD looked like for QVC and HSN. She said that's the way it should be.

The difference between compressed 480i and 1080i HD is about the same as the difference between an old VHS tape and a DVD movie in HD. Once we see how good it can be, we are never happy with lesser quality.

OTA



Cox cable

[rabbit73]

HSN comparison

OTA



Cox cable



CBS Sports OTA

[JET4]

I can see what you are saying about a 65" TV and a 32" TV. The 65" is very " fuzzy" and the 32" is not very bad at all on 49.5 and 49.6. All channels are good except 49.5 and 49.6 so we will live with it, It's good that my wife said she doesn't really need those channels. I said good it will save me money. Lol. Thank you very much for the time you have put into helping me.

[rabbit73]

You are welcome. I'm glad that I helped you understand how important it is to have an HD signal with a big screen TV.

You can also see the difference compression can make if you compare 480i QVC and HSN on ION OTA with the better 480i on PBS Create OTA.

I included the left side of the TV frame (except CBS; image too wide) to show that all images were about the same magnification; 40mm on my 15 inch laptop computer at 100%.