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
Satellite Systems - What to Buy - What to install
Dish size for Hotbird in London
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="2old4this" data-source="post: 4438" data-attributes="member: 174998"><p>it's not true that broadcasting digitally means a smaller dishsize is required than for analogue, but it is true that many of the modern digital broadcasts can be picked up on smaller dishes than used to be the case for the analogue stuff. This is not however related to the broadcast standard (digital vs. analogue) - it is down to factors such as greater signal strength from more powerful transponders on the modern satellites. </p><p></p><p>In fact, for a given signal strength and dish size, you are more likely to get a watchable picture from analogue transmissions than you are from digital. This is because the digital technology equates to "all or nothing" reception - a slightly too-weak signal (eg as experienced in heavy rain) results in severe blocking and very quickly in complete loss of picture. Under the same conditions, an analogue picture would usually still be watchable albeit with "sparklies" (dots and picture/sound degredation). </p><p></p><p>You also need to be aware that Hotbird is not a single beam (it isn't even a single satellite). The Hotbird cluster transmits its signals using several different beams, and they have different footpints, with different signal strengths. In general, to know the size of dish you need requires that you have identified the channels you want to watch, the specific beam that carries them, and the signal strength of that beam at your location (if indeed it is aimed at your location at all).</p><p></p><p>This kind of information is available for all satellites at Lyngsat.</p><p>See for example: http://www.lyngsat.com/hotbird.shtml</p><p>You will see that each satellite in the Hotbird cluster carries a couple of beams ("wide", "super", etc.)</p><p>Now in practise, in this case, it turns out that all of their footprints cover London, and even the weakest of them arrives there with a strength of 49dbW. </p><p></p><p>Several sites allow a rough "translation" of such figures to a dish size. Here is one such site:</p><p>http://sat-digital-tv.provider.pl/oprac/dbwtootm.html</p><p></p><p>Here you can finally conclude that you will need a dish size of 75cm diameter or bigger.</p><p></p><p>2old</p></blockquote><p></p>
[QUOTE="2old4this, post: 4438, member: 174998"] it's not true that broadcasting digitally means a smaller dishsize is required than for analogue, but it is true that many of the modern digital broadcasts can be picked up on smaller dishes than used to be the case for the analogue stuff. This is not however related to the broadcast standard (digital vs. analogue) - it is down to factors such as greater signal strength from more powerful transponders on the modern satellites. In fact, for a given signal strength and dish size, you are more likely to get a watchable picture from analogue transmissions than you are from digital. This is because the digital technology equates to "all or nothing" reception - a slightly too-weak signal (eg as experienced in heavy rain) results in severe blocking and very quickly in complete loss of picture. Under the same conditions, an analogue picture would usually still be watchable albeit with "sparklies" (dots and picture/sound degredation). You also need to be aware that Hotbird is not a single beam (it isn't even a single satellite). The Hotbird cluster transmits its signals using several different beams, and they have different footpints, with different signal strengths. In general, to know the size of dish you need requires that you have identified the channels you want to watch, the specific beam that carries them, and the signal strength of that beam at your location (if indeed it is aimed at your location at all). This kind of information is available for all satellites at Lyngsat. See for example: http://www.lyngsat.com/hotbird.shtml You will see that each satellite in the Hotbird cluster carries a couple of beams ("wide", "super", etc.) Now in practise, in this case, it turns out that all of their footprints cover London, and even the weakest of them arrives there with a strength of 49dbW. Several sites allow a rough "translation" of such figures to a dish size. Here is one such site: http://sat-digital-tv.provider.pl/oprac/dbwtootm.html Here you can finally conclude that you will need a dish size of 75cm diameter or bigger. 2old [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
Dish size for Hotbird in London
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