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
Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 2F: Iberia & Balearics Discussion
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="Huevos" data-source="post: 825278" data-attributes="member: 301161"><p><strong>Why a 1m dish will not work (Costa Blanca).</strong></p><p></p><p>I keep getting asked if 1m dishes are going to work in the Costa Blanca, and I can say with a lot of certainty that they will not. The reason why they won't is due to interference from Badr5. Not all transponders are affected by this so it is very easy to compare clean transponders with dirty ones. For the test I am going use my Fibo 90cm dish which easily out performs typical 100 x 90cm dishes that have been fitted throughout the Costa Blanca. Receiver for tests is a Vu+ Ultimo. The picture becomes unstable at around 40% SNR. Testing three transponders as follows:</p><ol> <li data-xf-list-type="ol">1N, clean transponder, 10994H, ITV1+1, 61dBuV, receiver SNR 75%;<br /> </li> <li data-xf-list-type="ol">1N, dirty transponder (Badr5), 10729V, C4+1, 62dBuV, receiver SNR 46%;<br /> </li> <li data-xf-list-type="ol">2F, clean transponder, 11023H, BBC1 HD Scotland, 58dBuV, receiver SNR 55%;</li> </ol><p></p><p>On one hand a clean transponder on 2F is 20% SNR below a clean transponder on 1N. But the 55% SNR is above the 40% needed to receive a viewable picture.</p><p></p><p>On the other hand the dirty transponder on 1N (interference from Badr5) only has an SNR of 46% to start with, even though the transponder has a slightly higher gross signal level. Take away the 20% SNR that is lost in the switch from 1N to 2F and you are down to only 26% SNR which is well below the 40% required. Going up to a 120 x 110cm dish filters a off a lot of the interference from Badr5 and gets us up to an SNR of 70% on this transponder, which may be just enough to get us stable reception after the switchover. Time will tell.</p><p></p><p>1N, clean transponder, 10994H, ITV1+1, 61dBuv, receiver SNR 75%;</p><p>[ATTACH]50880[/ATTACH]</p><p></p><p>1N, dirty transponder (Badr5), 10729V, C4+1, 62dBuV, receiver SNR 46%;</p><p>[ATTACH]50882[/ATTACH]</p><p></p><p>2F, clean transponder, 11023H, BBC1 HD Scotland, 58dBuV, receiver SNR 55%;</p><p>[ATTACH]50881[/ATTACH]</p><p></p><p>1N, same dirty transponder but using a 120 x 110cm dish to reduce interference from Badr5;</p><p>[ATTACH]50883[/ATTACH]</p></blockquote><p></p>
[QUOTE="Huevos, post: 825278, member: 301161"] [B]Why a 1m dish will not work (Costa Blanca).[/B] I keep getting asked if 1m dishes are going to work in the Costa Blanca, and I can say with a lot of certainty that they will not. The reason why they won't is due to interference from Badr5. Not all transponders are affected by this so it is very easy to compare clean transponders with dirty ones. For the test I am going use my Fibo 90cm dish which easily out performs typical 100 x 90cm dishes that have been fitted throughout the Costa Blanca. Receiver for tests is a Vu+ Ultimo. The picture becomes unstable at around 40% SNR. Testing three transponders as follows: [LIST=1][*]1N, clean transponder, 10994H, ITV1+1, 61dBuV, receiver SNR 75%; [*]1N, dirty transponder (Badr5), 10729V, C4+1, 62dBuV, receiver SNR 46%; [*]2F, clean transponder, 11023H, BBC1 HD Scotland, 58dBuV, receiver SNR 55%; [/LIST] On one hand a clean transponder on 2F is 20% SNR below a clean transponder on 1N. But the 55% SNR is above the 40% needed to receive a viewable picture. On the other hand the dirty transponder on 1N (interference from Badr5) only has an SNR of 46% to start with, even though the transponder has a slightly higher gross signal level. Take away the 20% SNR that is lost in the switch from 1N to 2F and you are down to only 26% SNR which is well below the 40% required. Going up to a 120 x 110cm dish filters a off a lot of the interference from Badr5 and gets us up to an SNR of 70% on this transponder, which may be just enough to get us stable reception after the switchover. Time will tell. 1N, clean transponder, 10994H, ITV1+1, 61dBuv, receiver SNR 75%; [ATTACH]50880.IPB[/ATTACH] 1N, dirty transponder (Badr5), 10729V, C4+1, 62dBuV, receiver SNR 46%; [ATTACH]50882.IPB[/ATTACH] 2F, clean transponder, 11023H, BBC1 HD Scotland, 58dBuV, receiver SNR 55%; [ATTACH]50881.IPB[/ATTACH] 1N, same dirty transponder but using a 120 x 110cm dish to reduce interference from Badr5; [ATTACH]50883.IPB[/ATTACH] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Astra 2F: Iberia & Balearics Discussion
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