satellite tp lists

[turbosat]

For people who have the knowledge and equipment to show this, how many transponders are on the satellites we watch here in N America? I think this info is found in something called Network Information TAble, or something like that.
I know these digital signals can split a transponder into many virtual tps, what is
an average number of these tps on, say, H2 or AMC5 or G17 ku ? Or is it dependent
on the number of active feeds on a sat at any one time?
Thanks,

 

[brentb636]

Here's the factsheet on Horizon-2.
http://www.intelsat.com/_files/resources/satellites/h-2-factsheet.pdf

H-2 is an all Ku band bird, so it has a large number of physical transponders in the 11700-12200 Mhz range. In Holland, Mi , I seem to be in a HOT beam.

Nothing wrong with that.
H-2 COULD broadcast 16 Big Ten Network uplinks at the same time, if it used all its 36MHZ tp's for the job, or, as you know, it could break down the 36MHZ tp's into 4 or 5 SD channels and mux them. Certainly , if they wanted to use mpeg4 and DVB-S2, they could put more channels into play.
I looked at the NIT for Ohio News Now, and it does not contain any Satellite capacity related info. Couldn't find anything with Tsreader that would tell me the physical nature of the satellite.

 

[turbosat]

Thanks, I am still trying to understand this new receiver I have, it gives info on the transport stream if you hit the info button twice. Most of the info does me absolutely no good, for average tv watching, but its there. I'm trying to figure out how this Icon scans, once it starts a blind scan, on most ku satellites it will show a number, such as 1/126 , 2 /126 etc as it scans. The large number varies from bird to bird, but usually between 120-128. I was just curious if that number happened to be some info from that satellite's NIT, maybe a listing of total 'virtual' tps .....Maybe its just a total number of tps stored in the rec's memory.

 

[brentb636]

I think that your "1/126" is probably the 500Mhz of the ku band divided by your step rate of 4 Mhz. Add one for the start point and you've got 126 . A blindscan, after all, ignores the tp list until after it updates the list with any new found tp definitions.

 

[turbosat]

I thought of that, and I guess it's the answer. But watching this Icon scan, when its set on steps of 4, it actually counts by 8, 12000, 12008, 12016 etc. And it switches back and forth frm H to V unless u set it to scan only one polarity. Never saw one work like that lol, would wear out a polarotor in a hurry (if it could control one).

 

[brentb636]

That seems strange behavior all right. I know the Merc II scans all one polarity, then switches to the other. I can't imagine it's good to be constantly switching the lnbf voltage. Seems odd, Tony .