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DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Ka with Prodelin/Viasat 1.2m Band B
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<blockquote data-quote="s-band" data-source="post: 1017565" data-attributes="member: 407744"><p>I found another version of the ODU that covers band D. I removed the LNB from the ODU and modified it so that the feed fits directly. There is a mis-match between the LNB waveguide and the feed but it doesn't seem too bad. It wasn't possible to try it easily on the Prodelin so I put it on the 1.5m PF. That is under-illuminated when using the standard feed but still adequate. Here is a scan from 16E H:</p><p></p><p>[ATTACH]107842[/ATTACH]</p><p></p><p>I also tried it with a standard scalar feed and it improved by about 1.5dB compared to the above. It shouldn't have come as a surprise but the position of the feed is critical to within a mm or so. The PF scalar feed is shown attached to the LNB here:</p><p></p><p>[ATTACH]107843[/ATTACH]</p><p></p><p>The attached .pdf shows the modifications I made to the LNB.</p></blockquote><p></p>
[QUOTE="s-band, post: 1017565, member: 407744"] I found another version of the ODU that covers band D. I removed the LNB from the ODU and modified it so that the feed fits directly. There is a mis-match between the LNB waveguide and the feed but it doesn't seem too bad. It wasn't possible to try it easily on the Prodelin so I put it on the 1.5m PF. That is under-illuminated when using the standard feed but still adequate. Here is a scan from 16E H: [ATTACH]107842[/ATTACH] I also tried it with a standard scalar feed and it improved by about 1.5dB compared to the above. It shouldn't have come as a surprise but the position of the feed is critical to within a mm or so. The PF scalar feed is shown attached to the LNB here: [ATTACH]107843[/ATTACH] The attached .pdf shows the modifications I made to the LNB. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
KA Band section
Ka with Prodelin/Viasat 1.2m Band B
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