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Dreambox Support Forum
Help to tune for C-Band Chanels in 600PVR
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<blockquote data-quote="izefisherman" data-source="post: 401470" data-attributes="member: 233523"><p>Set the LO frequency for the corresponding lnb to 5150MHz</p><p></p><p>You may need to tag the "INV" option if you try to do a manual transponder scan.</p><p></p><p>My DM500S is a bit tricky to get going on C-band, perhaps since IF frequency is calculated inversely (LO is higher than received frequency).</p><p></p><p></p><p></p><p>This next trick will ALWAYS work however since all sat receivers actually receive 950MHZ - 2150MHz, the rest is software and math to display and use actual frequencies:</p><p></p><p>If circular polarisation is used you can translate like this:</p><p>Vertical = Left hand circular polarisation (LHCP) </p><p>Horizontal = Right hand circular polarisation (RHCP)</p><p></p><p>Now translate the C-band frequency into a Ku-band frequency like this: </p><p>5150 - Cband_MHz = IF_MHz</p><p>IF_MHz + 9750 = Ku_lowband_MHz or IF_MHz + 10600 = Ku_highband_MHz</p><p></p><p>Note that the higher the C-band frequency is, the lower the fake Ku-band frequency will be.</p><p></p><p>A few examples for you to try out on Insat 83.0 deg East:</p><p></p><p>Asianet mux 3643V</p><p>5150-3643 = 1507</p><p>1507 + 9750 = 11257</p><p>use 11257MHz Vertical</p><p></p><p>Kairali 3845V</p><p>5150-3845 = 1305</p><p>1305+9750 = 11055</p><p>use 11055MHz Vertical</p><p></p><p>For both above examples the receiver must be configured to have a Universal Ku-band LNB with 9750/10600MHz LO.</p><p></p><p>Good luck </p><p></p><p>Ize</p><p></p><p>Edit: You can use any satellite you don't need in the satellite list as Insat 83E and scan manually. It will then serve as a placeholder for the channels you have actually scanned on 83E.</p></blockquote><p></p>
[QUOTE="izefisherman, post: 401470, member: 233523"] Set the LO frequency for the corresponding lnb to 5150MHz You may need to tag the "INV" option if you try to do a manual transponder scan. My DM500S is a bit tricky to get going on C-band, perhaps since IF frequency is calculated inversely (LO is higher than received frequency). This next trick will ALWAYS work however since all sat receivers actually receive 950MHZ - 2150MHz, the rest is software and math to display and use actual frequencies: If circular polarisation is used you can translate like this: Vertical = Left hand circular polarisation (LHCP) Horizontal = Right hand circular polarisation (RHCP) Now translate the C-band frequency into a Ku-band frequency like this: 5150 - Cband_MHz = IF_MHz IF_MHz + 9750 = Ku_lowband_MHz or IF_MHz + 10600 = Ku_highband_MHz Note that the higher the C-band frequency is, the lower the fake Ku-band frequency will be. A few examples for you to try out on Insat 83.0 deg East: Asianet mux 3643V 5150-3643 = 1507 1507 + 9750 = 11257 use 11257MHz Vertical Kairali 3845V 5150-3845 = 1305 1305+9750 = 11055 use 11055MHz Vertical For both above examples the receiver must be configured to have a Universal Ku-band LNB with 9750/10600MHz LO. Good luck Ize Edit: You can use any satellite you don't need in the satellite list as Insat 83E and scan manually. It will then serve as a placeholder for the channels you have actually scanned on 83E. [/QUOTE]
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Help to tune for C-Band Chanels in 600PVR
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