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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
How much worse is prime focus?
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<blockquote data-quote="ouagadougou" data-source="post: 201229" data-attributes="member: 187470"><p>Its difficult to make a comparison based on the diameter only. You need to know the actual surface area of the reflector to be able to begin to calculate the gain. Other factors like efficiency and surface accuracy then come into play.</p><p></p><p>Look at the quoted gain figure when you do your comparisons and then ask if anyone has any comments about a particular dish type before you buy it. Sometimes the claimed gain and efficiency is not accurate.</p><p></p><p>If an Offset and a Prime Focus have the same quoted gain figure you will find that the Offset should be slightly better on receive due to lower ground noise etc.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="ouagadougou, post: 201229, member: 187470"] Its difficult to make a comparison based on the diameter only. You need to know the actual surface area of the reflector to be able to begin to calculate the gain. Other factors like efficiency and surface accuracy then come into play. Look at the quoted gain figure when you do your comparisons and then ask if anyone has any comments about a particular dish type before you buy it. Sometimes the claimed gain and efficiency is not accurate. If an Offset and a Prime Focus have the same quoted gain figure you will find that the Offset should be slightly better on receive due to lower ground noise etc. Cheers. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
How much worse is prime focus?
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