https://www.instructables.com/HDTV-Multipath-Shield/
I don't believe this is genuine, for a a number of reasons.
Bill
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrightsaerials@aol.com wrote:It's certainly not an issue for DVB-T, but ATSC is a different kettle
https://www.instructables.com/HDTV-Multipath-Shield/Multipath was certainly an issue for analog TV, and a paler shadow image would appear displaced horizontally in the picture.
I don't believe this is genuine, for a a number of reasons.
Bill
Not an issue AFAIK with terrestrial digital TV.
On 05/01/2022 19:03, R. Mark Clayton wrote:
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrightsaerials@aol.comIt's certainly not an issue for DVB-T, but ATSC is a different kettle
wrote:
https://www.instructables.com/HDTV-Multipath-Shield/Multipath was certainly an issue for analog TV, and a paler shadow
I don't believe this is genuine, for a a number of reasons.
Bill
image would appear displaced horizontally in the picture.
Not an issue AFAIK with terrestrial digital TV.
of fish.
For starters, as the web page shows, it has a 'spot' pilot carrier, I
need to read up on what purpose that serves ?
On 05/01/2022 20:03, Mark Carver wrote:+1
On 05/01/2022 19:03, R. Mark Clayton wrote:
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrights...@aol.comIt's certainly not an issue for DVB-T, but ATSC is a different kettle
wrote:
https://www.instructables.com/HDTV-Multipath-Shield/Multipath was certainly an issue for analog TV, and a paler shadow
I don't believe this is genuine, for a a number of reasons.
Bill
image would appear displaced horizontally in the picture.
Not an issue AFAIK with terrestrial digital TV.
of fish.
For starters, as the web page shows, it has a 'spot' pilot carrier, I
need to read up on what purpose that serves ?
Well anyway, here's why I think it's a made-up article.
1. He says that the reflections are caused by "signal bouncing back and forth between the two buildings" that are either side of the signal
path. Gibberish.
1a. If he is suffering multipath it won't be from those buildings; it
will be from buildings to the side and rear of his location, with the
s/n ratio worsened by the foliage attenuation of the direct signal path.
1b. His screening device couldn't possibly discriminate between a signal originating from between those buildings and a reflection coming from
one or both of the buildings. The angle is too narrow.
2. The screening box-thing is so close to the aerial that it encroaches severely on the aerial's capture area. It's about λ/2 but it needs to at least 2λ. It would de-tune the aerial and lower the gain severely. The
same applies to the dustbin idea.
My guess is he's done this in ignorance and found it didn't work so he's just made out it has.
Bill
My guess is he's done this in ignorance and found it didn't work so he's
just made out it has.
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrightsaerials@aol.com
wrote:
https://www.instructables.com/HDTV-Multipath-Shield/
I don't believe this is genuine, for a a number of reasons.
Bill
Multipath was certainly an issue for analog TV, and a paler shadow image would appear displaced horizontally in the picture.
Not an issue AFAIK with terrestrial digital TV. You can get adjacent
channel interference on satellite if you don't have your LNB aligned quite right.
On 05/01/2022 20:03, Mark Carver wrote:
On 05/01/2022 19:03, R. Mark Clayton wrote:
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrightsaerials@aol.comIt's certainly not an issue for DVB-T, but ATSC is a different kettle of
wrote:
https://www.instructables.com/HDTV-Multipath-Shield/Multipath was certainly an issue for analog TV, and a paler shadow image >>> would appear displaced horizontally in the picture.
I don't believe this is genuine, for a a number of reasons.
Bill
Not an issue AFAIK with terrestrial digital TV.
fish.
For starters, as the web page shows, it has a 'spot' pilot carrier, I
need to read up on what purpose that serves ?
Well anyway, here's why I think it's a made-up article.
1. He says that the reflections are caused by "signal bouncing back and
forth between the two buildings" that are either side of the signal path. Gibberish.
1a. If he is suffering multipath it won't be from those buildings; it will
be from buildings to the side and rear of his location, with the s/n ratio worsened by the foliage attenuation of the direct signal path.
1b. His screening device couldn't possibly discriminate between a signal originating from between those buildings and a reflection coming from one
or both of the buildings. The angle is too narrow.
2. The screening box-thing is so close to the aerial that it encroaches severely on the aerial's capture area. It's about ?/2 but it needs to at least 2?. It would de-tune the aerial and lower the gain severely. The
same applies to the dustbin idea.
My guess is he's done this in ignorance and found it didn't work so he's
just made out it has.
Bill
https://www.instructables.com/HDTV-Multipath-Shield/
I don't believe this is genuine, for a a number of reasons.
Bill
On 05/01/2022 20:03, Mark Carver wrote:+1
On 05/01/2022 19:03, R. Mark Clayton wrote:
On Wednesday, 5 January 2022 at 18:09:26 UTC, wrights...@aol.comIt's certainly not an issue for DVB-T, but ATSC is a different kettle
wrote:
https://www.instructables.com/HDTV-Multipath-Shield/Multipath was certainly an issue for analog TV, and a paler shadow
I don't believe this is genuine, for a a number of reasons.
Bill
image would appear displaced horizontally in the picture.
Not an issue AFAIK with terrestrial digital TV.
of fish.
For starters, as the web page shows, it has a 'spot' pilot carrier, I
need to read up on what purpose that serves ?
Well anyway, here's why I think it's a made-up article.
1. He says that the reflections are caused by "signal bouncing back and
forth between the two buildings" that are either side of the signal
path. Gibberish.
1a. If he is suffering multipath it won't be from those buildings; it
will be from buildings to the side and rear of his location, with the
s/n ratio worsened by the foliage attenuation of the direct signal path.
1b. His screening device couldn't possibly discriminate between a signal originating from between those buildings and a reflection coming from
one or both of the buildings. The angle is too narrow.
2. The screening box-thing is so close to the aerial that it encroaches severely on the aerial's capture area. It's about ?/2 but it needs to at least 2?. It would de-tune the aerial and lower the gain severely. The
same applies to the dustbin idea.
My guess is he's done this in ignorance and found it didn't work so he's
just made out it has.
Bill
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