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DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
Calculation of the focal length of an offset satellite dish antenna, Revisited
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<blockquote data-quote="a33" data-source="post: 1157093" data-attributes="member: 332642"><p>Ah! Not my expertise at all! <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /><img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p><p>But nice to have new pioneers using this knowledge!</p><p></p><p></p><p>I had a contact with an Austrian specialist/hobbyist some time ago, using a Kathrein dish of about 90 cm for things like this, so probably a CAS-90 as well. He came with measures height = 945mm, width = 925mm (are you sure you measured without the dish rim?); <strong>but that one did not have a flat dishface!</strong></p><p>So that part B of my article would be applicable.</p><p>In that case, apart from height and width, two depth measurements at the center are needed. And the measurements should be done with some extra care, as a measurement error has more consequences here.</p><p></p><p>Have you read part B already?</p><p>Measurement procedure is also here: <a href="https://www.satellites.co.uk/forums/threads/measuring-and-calculating-zone-1-and-zone-2-dish.176616/#post-1079261" target="_blank">Measuring and calculating zone-1 and zone-2 dish</a></p><p>Or a shorter one: <a href="https://www.satelliteguys.us/xen/threads/question-about-lnb-position.396314/#post-4662894" target="_blank">OTHER - Question about LNB position</a></p><p>When you want precise results, please invest time and effort in precise measurement! (As I invested time and effort in the precise formulas.)</p><p></p><p></p><p>By the way, I seldom use maximum depth as input; I prefer the calculating methods for depth at the center (easier to determine/measure, I think).</p><p></p><p></p><p>Greetz ( = 'popular' word for "greetings"),</p><p></p><p>A33.</p></blockquote><p></p>
[QUOTE="a33, post: 1157093, member: 332642"] Ah! Not my expertise at all! :):) But nice to have new pioneers using this knowledge! I had a contact with an Austrian specialist/hobbyist some time ago, using a Kathrein dish of about 90 cm for things like this, so probably a CAS-90 as well. He came with measures height = 945mm, width = 925mm (are you sure you measured without the dish rim?); [B]but that one did not have a flat dishface![/B] So that part B of my article would be applicable. In that case, apart from height and width, two depth measurements at the center are needed. And the measurements should be done with some extra care, as a measurement error has more consequences here. Have you read part B already? Measurement procedure is also here: [URL='https://www.satellites.co.uk/forums/threads/measuring-and-calculating-zone-1-and-zone-2-dish.176616/#post-1079261']Measuring and calculating zone-1 and zone-2 dish[/URL] Or a shorter one: [URL='https://www.satelliteguys.us/xen/threads/question-about-lnb-position.396314/#post-4662894']OTHER - Question about LNB position[/URL] When you want precise results, please invest time and effort in precise measurement! (As I invested time and effort in the precise formulas.) By the way, I seldom use maximum depth as input; I prefer the calculating methods for depth at the center (easier to determine/measure, I think). Greetz ( = 'popular' word for "greetings"), A33. [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
Calculation of the focal length of an offset satellite dish antenna, Revisited
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