Picture Quality

[redelephants]

What could a good soaking rain have to do with my picture quality. I have noticed that after a good soaking rain that my picture quality seems to improve. Is there anything possible that could link the two. I have underground utilities and wondering if it has to due with a transformer box i have in my front yard.

 

[goaliebob99]

They have nothing to do with each other... Other than rain could knock out your signal.

 

[MikeD-C05]

Maybe the rain showers cleans up your signal quality.

 

[TimberWolf]

Your electrical service could have interference on it that is grounded out when it rains

 

[redelephants]

Your electrical service could have interference on it that is grounded out when it rains

How common is electric interference, would kind of problems does it cause and how to you get rid of it? It definately makes sense that this could be a potential problem.

 

[bweiteka]

It has nothing to do with it. With a digital picture such as this you will either have a picture, or a screen that says searching for signal. There is a very narrow margin where you have just enough signal to almost get a picture but it shows up as a bunch of tiles on the screen. This is most often seen right before loosing signal or right before the quality of the signal comes back enough to allow the picture to be processed and viewed.

 

[redelephants]

It has nothing to do with it. With a digital picture such as this you will either have a picture, or a screen that says searching for signal. There is a very narrow margin where you have just enough signal to almost get a picture but it shows up as a bunch of tiles on the screen. This is most often seen right before loosing signal or right before the quality of the signal comes back enough to allow the picture to be processed and viewed.

so with a digital picture there could be no electrical interference? is that an educated answer?

 

[bweiteka]

there can be electrical interference, I just don't believe it is related to what he is describing. Electrical interference can cause things like wavy lines washing through a screen when a tv is hooked up to an analog signal, for instance when the tv is on ch. 3 and hooked to a sd box. Actually i guess the op did not post what kind of tv and receiver he had, so maybe that is exactly what he is seeing. I guess i made a quick assumption that he was just saying that the picture was not crisp and clear until it rained.

 

[3HaloODST]

Satellite signals use something called Forward Error Correction which is basically redundant data in which is used when there is interference. So basically it's gonna either work or not. Think of a poor signal as a scratched DVD. DVDs also use Forward Error Correction and we all know what happens to a DVD. It either works, skips, or doesn't work at all. But also keep in mind that DVDs can handle minor scratches, and thumbprints, and dust, because of the FEC, yet the quality of the DVD is unaffected. Think of a not quite-peaked signal as a lightly scratched DVD that plays just fine.

Forward error correction - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Text_document_with_red_question_mark.svg" class="image"><img alt="Text document with red question mark.svg" src="http://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/40px-Text_document_with_red_question_mark.svg.png"@@AMEPARAM@@commons/thumb/a/a4/Text_document_with_red_question_mark.svg/40px-Text_document_with_red_question_mark.svg.png

 

[redelephants]

Satellite signals use something called Forward Error Correction which is basically redundant data in which is used when there is interference. So basically it's gonna either work or not. Think of a poor signal as a scratched DVD. DVDs also use Forward Error Correction and we all know what happens to a DVD. It either works, skips, or doesn't work at all. But also keep in mind that DVDs can handle minor scratches, and thumbprints, and dust, because of the FEC, yet the quality of the DVD is unaffected. Think of a not quite-peaked signal as a lightly scratched DVD that plays just fine.

Forward error correction - Wikipedia, the free encyclopedia

So what you stating is that Sat signals have FEC and therefore wouldn't be interfered with by Transverse Mode Noise from Dirty AC grid?

 

[3HaloODST]

So what you stating is that Sat signals have FEC and therefore wouldn't be interfered with by Transverse Mode Noise from Dirty AC grid?

Well, I'm not sure about what kind of effects an unclean AC line would have on the receiver, but my guess is that the picture will either work, skip, or not work at all. Yes I have read that the satellite signals use FEC. I would think Transverse Mode Noise would affect the attenuation of the signal, but not enough to make the picture quality suffer. Basically I would look at my point dish screen. FEC is also really good with impulse noise, so I would think even electrical line impulse noise, as well as interference such as rain droplets, and foliage/obstacles will not affect the picture to a certain extent.

Basically, with the error-correction protocols, I believe that as long as the signal bar shows green you will have the same picture quality regardless. I believe that the electrical noise would have more of an effect on reliability than quality. Which could in turn affect how robust it is during rain fade events, just like a poorly peaked dish would, but maybe even to a lesser extent.

However, I am no electronic engineer, so for all I know my theories could be wrong, but they make sense to me.