Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Newsnet on Ka Band A
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="tony smith" data-source="post: 893353" data-attributes="member: 402577"><p>Hi Llew</p><p>The Astra satellite at 19.2 east, with Ka transponders is Astra 1L, she is a sort of one of 2, the other was 1H now retired, built by Locheed Martin, shes a A2100 craft, during my check out of this type, I found that earlier versions built upto 2006, did have a problem with their solar panels, some sections going near short circuit, later craft they installed protection diodes.</p><p>Astra 1L was launched 2007 , but if she had the mods on I can not find out.</p><p></p><p>This brings me back to your question, her up link transponders are split H and V they are each split into 10 subtransponders each 50 Mhz wide( 29.500 Ghz to 30.000 Ghz) , the V ones are all numbered odd so Ka 1 to Ka 19 and H are even Ka2 toKa 20(some may be inactive as SES calls up 400 Mhz .</p><p></p><p>The down link transponders are reversed thats V even spit into 10, and H odd split into again 10.</p><p>(18.300 to18800Ghz)</p><p></p><p>Each subtransponder has it satellite antenna oriented to diffrent sections of Europe, so you can use very small uplink antennas for uplinking, UK has beam 4 uplink is Ka10,Ka 12,Ka 14 (H up) and (V down) so our downlink transponder numbers are same. the UK downlink is 18.500 to 18.650, the active UK one is 18.500, to18.550Ka 10 at this point in time.</p><p></p><p>Bit long winded this but the point is, I have seen Ka 10 V go very low in level, and some carriers</p><p>switched off and back on in either seconds or longer up to few mins, this I think is a fault with the satellite, I have also found out that she may have a digital channeliser, to assit in bent pipe</p><p>operations,( frequency changing and feeding to down transponders) I did speak to the USA Forum as its a American made satellite, to see if they could shead any light on this, as a possible fault cause, but silly me they of course cannot see it.</p><p></p><p>The downlinks were for "Hubs" very large antennas to pick up and feed data out via internet cables to end users, but it seems to be in a SNG operation, working into smallish antennas for regional ITV News, therfore if the satellite has a fault, then this could be a big problem, and not just the weather reducing signal level to possibly below their antenna or receivers thresshold.</p><p></p><p>This may have been what you picked up yesterday, or not as the case maybe.the only other active V downlink transponder I have see active is Ka 4 18.36x thats beam 1 or 2 Spain or Portugal(Penthouse 3D?)</p><p></p><p>So as you may have seen interesting happenings, thats keeps me looking at it.</p></blockquote><p></p>
[QUOTE="tony smith, post: 893353, member: 402577"] Hi Llew The Astra satellite at 19.2 east, with Ka transponders is Astra 1L, she is a sort of one of 2, the other was 1H now retired, built by Locheed Martin, shes a A2100 craft, during my check out of this type, I found that earlier versions built upto 2006, did have a problem with their solar panels, some sections going near short circuit, later craft they installed protection diodes. Astra 1L was launched 2007 , but if she had the mods on I can not find out. This brings me back to your question, her up link transponders are split H and V they are each split into 10 subtransponders each 50 Mhz wide( 29.500 Ghz to 30.000 Ghz) , the V ones are all numbered odd so Ka 1 to Ka 19 and H are even Ka2 toKa 20(some may be inactive as SES calls up 400 Mhz . The down link transponders are reversed thats V even spit into 10, and H odd split into again 10. (18.300 to18800Ghz) Each subtransponder has it satellite antenna oriented to diffrent sections of Europe, so you can use very small uplink antennas for uplinking, UK has beam 4 uplink is Ka10,Ka 12,Ka 14 (H up) and (V down) so our downlink transponder numbers are same. the UK downlink is 18.500 to 18.650, the active UK one is 18.500, to18.550Ka 10 at this point in time. Bit long winded this but the point is, I have seen Ka 10 V go very low in level, and some carriers switched off and back on in either seconds or longer up to few mins, this I think is a fault with the satellite, I have also found out that she may have a digital channeliser, to assit in bent pipe operations,( frequency changing and feeding to down transponders) I did speak to the USA Forum as its a American made satellite, to see if they could shead any light on this, as a possible fault cause, but silly me they of course cannot see it. The downlinks were for "Hubs" very large antennas to pick up and feed data out via internet cables to end users, but it seems to be in a SNG operation, working into smallish antennas for regional ITV News, therfore if the satellite has a fault, then this could be a big problem, and not just the weather reducing signal level to possibly below their antenna or receivers thresshold. This may have been what you picked up yesterday, or not as the case maybe.the only other active V downlink transponder I have see active is Ka 4 18.36x thats beam 1 or 2 Spain or Portugal(Penthouse 3D?) So as you may have seen interesting happenings, thats keeps me looking at it. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Newsnet on Ka Band A
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top