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Dreambox Satellite Receiver | Tutorials | Software
Dreambox 500
No circular signals received
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<blockquote data-quote="futumsch" data-source="post: 672700" data-attributes="member: 321089"><p>I have no experience on this either, so just some ideas...</p><p>As you say, you've connected your coax to the circular output connector, so your receiver shouldn't care less if the RF signal was linear or circularly polarised going into the LNB so I doubt your receiver is faulty, more like your LNB or your LNB set up.</p><p></p><p>Looking at the Invacom QPH-031 datasheet, and I would expect this is typical for all US market LNBs, is that the Low Band LOF is 10750 and the high band LOF is 11250, so shouldn't you set your LOF/L* in your DM500 to 10750? Otherwise if you have LOF/L set to 9750 your going to have a gap in your received frequecies between 11900 and 12200. If someone think this is wrong, then please correct me.</p><p></p><p>My other thought is, if you suspect the circular input on the LNB is faulty, you can pick up circular signals on the linear feed, but you lose around 3dB. That is probably a lot of signal strenth to lose for a home DBS system, so that might not work so well.</p><p></p><p>*Edit: Seems that you guys in the US only need to have one LOF set up on your receiver, but some lists say use 11250, some say 10750. So maybe an LO of 10750 will work?</p></blockquote><p></p>
[QUOTE="futumsch, post: 672700, member: 321089"] I have no experience on this either, so just some ideas... As you say, you've connected your coax to the circular output connector, so your receiver shouldn't care less if the RF signal was linear or circularly polarised going into the LNB so I doubt your receiver is faulty, more like your LNB or your LNB set up. Looking at the Invacom QPH-031 datasheet, and I would expect this is typical for all US market LNBs, is that the Low Band LOF is 10750 and the high band LOF is 11250, so shouldn't you set your LOF/L* in your DM500 to 10750? Otherwise if you have LOF/L set to 9750 your going to have a gap in your received frequecies between 11900 and 12200. If someone think this is wrong, then please correct me. My other thought is, if you suspect the circular input on the LNB is faulty, you can pick up circular signals on the linear feed, but you lose around 3dB. That is probably a lot of signal strenth to lose for a home DBS system, so that might not work so well. *Edit: Seems that you guys in the US only need to have one LOF set up on your receiver, but some lists say use 11250, some say 10750. So maybe an LO of 10750 will work? [/QUOTE]
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Linux Based Receivers
Dreambox Support Forum
Dreambox Satellite Receiver | Tutorials | Software
Dreambox 500
No circular signals received
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