Discussion about all FEEDs

[joshp79]

I often see feeds on C Band with both H and V transponder details, like these:

Eutelsat 10A @ 10.0E C-band
3886 H/V 3750
DVB-S2 - 4:2:0 - 8PSK
ID: Service-1

or this one:

Eutelsat 10B @ 10°E C-BAND
TP:3889 H/V 7200
DVB-S2. 4:2:0. 8PSK
Name: *unnamed-1* (*unnamed-1*)

Dose that mean the feed could either Horizontal or Vertical ? ( With the same TP details.)
Could someone please explain ?
Thanks

It's actually Left/Right (circular) polarization. Any normal LNB can be changed to circular polarization using special Teflon plate.

 

[jenseneverest]

It's actually Left/Right (circular) polarization. Any normal LNB can be changed to circular polarization using special Teflon plate.

Thanks, i thought i was loosing the plot for a moment there, i have no C Band dishes (or any knowledge at all with C Band really),
I am working on some code for a script where i need to clarify this correctly.
With my STB on a C Band satellite (that i cant actually receive) i have options of: Horizontal, Vertical, Circular right, Circular Left.

So which one dose H/V actually mean ?

 

[joshp79]

Thanks, i thought i was loosing the plot for a moment there, i have no C Band dishes (or any knowledge at all with C Band really),
I am working on some code for a script where i need to clarify this correctly.
With my STB on a C Band satellite (that i cant actually receive) i have options of: Horizontal, Vertical, Circular right, Circular Left.

So which one dose H/V actually mean ?

Horizontal/Vertical

 

[alexmkd1]

Anyone get picture on this 2 feeds?
21.6 E
11675 V 2916
11687 V 2500
i get the signal but unnamed with ? mark

 

[moonbase]

I often see feeds on C Band with both H and V transponder details, like these:

Eutelsat 10A @ 10.0E C-band
3886 H/V 3750
DVB-S2 - 4:2:0 - 8PSK
ID: Service-1

or this one:

Eutelsat 10B @ 10°E C-BAND
TP:3889 H/V 7200
DVB-S2. 4:2:0. 8PSK
Name: *unnamed-1* (*unnamed-1*)

Dose that mean the feed could either Horizontal or Vertical ? ( With the same TP details.)
Could someone please explain ?
Thanks

Circular polarity will scan in as both H and V if the signal level is strong enough.
For 10.0E simply check out Lygnsat, the polarities are listed as R and L not H and V.

All it needs is a dielectric plate in the LNBF barrel and it will convert to linear polarities and scan correctly.

 

[moonbase]

Thanks, i thought i was loosing the plot for a moment there, i have no C Band dishes (or any knowledge at all with C Band really),
I am working on some code for a script where i need to clarify this correctly.
With my STB on a C Band satellite (that i cant actually receive) i have options of: Horizontal, Vertical, Circular right, Circular Left.

So which one dose H/V actually mean ?

R = V, H = L

 

[jenseneverest]

Circular polarity will scan in as both H and V if the signal level is strong enough.
For 10.0E simply check out Lygnsat, the polarities are listed as R and L not H and V.

Thanks, I'm struggling to get me head round it if I'm honest!! I guess that is just how C Band works.
So with regards to the feeds above it literally makes no difference if you were to choose Circular Left / Right when you were manually scanning for the channel yourself ?
Am i correct in saying that with C Band you have all 4 options - Horizontal, Vertical, Circular right, Circular Left. ? Or is it simply Left/ Right on all Sat's ??
Here is another C Band feed, but this time with TP info as **** H ****

Asiasat 5 (100.5°E) C BAND
3906 H 7200
DVB-S2 - 1080P - 8PSK
4:2:0
ID:GesAdtec5

Or is it that TP's with just an " H " should actually be Circular Left.

Wish i had the space for a larger dish and then i could try C Band myself.

 

[Ratzvan]

Circular polarity will scan in as both H and V if the signal level is strong enough.
For 10.0E simply check out Lygnsat, the polarities are listed as R and L not H and V.

All it needs is a dielectric plate in the LNBF barrel and it will convert to linear polarities and scan correctly.

You expose a very odd situation
For what I see it's not a problem related to dielectric plate.
As you correctly said without dielectric plate correct polarity can't be discerned and signal on both polarity arrive to the lnb.
But it's real true too that without a dielectric plate the loss in signal would be too high to justify the correct reception of much parts of feeds and regulare channels on circular polarity (because lnb are optimized to receive H/V waves only - conversion from circular made by the quoted dielctric plate).
So reality is most simple
Users have the dielectric plate inside, but often put in a wrong way or most simply users can't understand anything about circular polarity and how to post correct polarity
In a strict sense sistem capacities are better than user own knowledge about satellite stuffs

Look here



As you can see user post the feed as Horizontal/Vertical polarity.
But if you look to the pic inside with EBSpro details, feed is marked as vertical and not Horizontal/Vertical.
This user has dielectric plate inverted and if you look to all his feeds, circular polarity is always inverted.

So correct polarity is Horizontal and it means C/L is the correct mark for it.
(In fact feeds in higher range of 47.5°W always have left polarity).

 

[Ratzvan]

Thanks, I'm struggling to get me head round it if I'm honest!! I guess that is just how C Band works.
So with regards to the feeds above it literally makes no difference if you were to choose Circular Left / Right when you were manually scanning for the channel yourself ?
Am i correct in saying that with C Band you have all 4 options - Horizontal, Vertical, Circular right, Circular Left. ? Or is it simply Left/ Right on all Sat's ??
Here is another C Band feed, but this time with TP info as **** H ****

Asiasat 5 (100.5°E) C BAND
3906 H 7200
DVB-S2 - 1080P - 8PSK
4:2:0
ID:GesAdtec5

Or is it that TP's with just an " H " should actually be Circular Left.

Wish i had the space for a larger dish and then i could try C Band myself.

Not totally true.
It depends of the kind of satellite.
Usually satellites on C-band are set or on linear or on circular polarity.
I depends on several factors, because it has advantages and disadvantages.

In your case 100E has linear polarities: so H/V and not L/R

 

[moonbase]

Thanks, I'm struggling to get me head round it if I'm honest!! I guess that is just how C Band works.
So with regards to the feeds above it literally makes no difference if you were to choose Circular Left / Right when you were manually scanning for the channel yourself ?
Am i correct in saying that with C Band you have all 4 options - Horizontal, Vertical, Circular right, Circular Left. ? Or is it simply Left/ Right on all Sat's ??
Here is another C Band feed, but this time with TP info as **** H ****

Asiasat 5 (100.5°E) C BAND
3906 H 7200
DVB-S2 - 1080P - 8PSK
4:2:0
ID:GesAdtec5

Or is it that TP's with just an " H " should actually be Circular Left.

Wish i had the space for a larger dish and then i could try C Band myself.

100.5E is a linear polarity satellite for C-Band, the polarity is correct.
Satellites with C-Band are generally one or the other but not both, however, I think there are one or two that might be both linear and circular polarity.

An LNB reads linear polarity, a dielectric plate or a polo pipe converts circular polarity to linear polarity.
Howver, for a strong enough signal an LNB can register circular polarity without a dielectric plate, this is when it registers a frequency as both H and V,

 

[moonbase]

In a strict sense sistem capacities are better than user own knowledge about satellite stuffs

Yes, it is lack of knowledge about circular polarity and how to use equipment that causes confusion.

If a dielectric plate is used correctly it should be orientated so that it bisects the 90 degree angle of the twin Rx probes in the LNB.
This will allow scanning apps to correctly register the polarites. If a polo pipe or a pin pipe is used, the steps or pins should be at 12 o'clock and 6 o'clock with the twin probes at approximately 7.5 minutes either side of 6 o'clock.

One issue with dielectric plates is that they can block part of the signal entering the LNB(F) feed.
The use of a polo pipe with internal steps or a pin pipe with internal pins can sometimes allow more signal to the probes and give higher signal level compared to a dielectric plate.

 

[mikem93]

cw right @Dani Sat ??

https://www.sat-universe.com/index.php?threads/ex-czechoslovakia-czech-republic-and-slovakia-football.299976/post-2037371382

 

[Victor64]

Good Morning,

A good feed for Paris - Nice cycling racing ?
Thank you !

 

[jsc5]

Hey friends !!!!! How many DB do you have today from Thor 0.8E 12526 V 6660,12534 V 4800 and 12541 V 6660.

 

[Ratzvan]

Hey friends !!!!! How many DB do you have today from Thor 0.8E 12526 V 6660,12534 V 4800 and 12541 V 6660.

Toroidal T90 dish, central Europe, black cloudy day...

 

[Ferari3000]

Can anyone find a feed from the Women's Volleyball Champions League on satellite 7 degrees east, probably, it already started a few minutes ago, Fenerbahce - Vakifbank

 

[kantik]

Just for the info:

Professional video services return to Hotbird

Eutelsat has announced an expansion of its Professional Video Services to its flagship Hotbird neighbourhood at 13 degrees East.

www.broadbandtvnews.com

Hotbird 13e sat position is used for feeds the last two weeks, almost every day. We have one more sat for hunting, in the empty TPs.

 

[Ferari3000]

no one has been able to find a feed for the Women's Champions League match between Conegliano and Rzesow, it's been running for about 15 minutes now

 

[Ratzvan]

7E 11153 H 7200 4:2:0
Event: DVD Presale of Film
ID: PMT PID: 4096, SID: 1 @ Service01 (FFmpeg)

69 D0 2A 7F A9 06 CE 56 #CW:6E B8 82 A8 B8 F3 39 E4

Now EHF with new

• International
• European Championship, Qualifikation Group F, Runde 3

Färöer
20:00Heute

Niederlande
ID: PMT PID: 30, SID: 1 @ Open Broadcast Encoder Service (Open Broadcast Encoder Provider)

7E 11153 H 7200 4:2:0

ID: PMT PID: 30, SID: 1 @ Open Broadcast Encoder Service (Open Broadcast Encoder Provider)

• International
• European Championship, Qualifikation Group F, Runde 3

Färöer
20:00Heute

Niederlande

69 D0 2A 7F A9 06 CE 56 #CW:6E B8 82 A8 B8 F3 39 E4

Three same posts yesterday: two in unknown thread at 17:51 and 17:57 pm, one in handball thread at 17:59pm.

NOT MY BUSINESS

But at the bottom of each post there is a lovely edit option that allow a post edit for at least 30 minutes.



It could be used sometime just doing with a single post what has been done with three and help moderator sorting it correctly.

Just reporting this because the same stuff has been repeated since months

 

[mikem93]

@believing_boy
right cw ??

https://www.sat-universe.com/index.php?threads/german-football-bundesliga-etc-if-4-2-2-or-4-2-0-please-include-this-info-in-your-post.253481/post-2037372583