Nalin
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Silver Member Username: Crazy_greekPost Number: 1000 Registered: Jul-06 |  Hey Nalin Can you tell me why, I can't scan any TPs with DVB-8PSK? |
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Gold Member Username: NydasPost Number: 2941 Registered: Jun-06 | Humax PR-HD1000 File Format: PDF/Adobe Acrobat - View as HTMLuses the DVB-8PSK modulation. which is not compatible with the. current software configuration. of the Humax PR-HD1000. SITV-HD not recognised in. DVB mode ...www.tele-satellite.com/TELE-satellite-0607/eng/humax.pdf - Similar pages In the above, you will see that they were not receiveing all the HD channels. Also see, www.powertv.com/products/customers/white-papers/BCA-2002%20Ken%20Hanna.pdf - "While QPSK has been in use for many years higher orders of modulation such as 8PSK and 160AM have recently enabled the satellite industry to increase transponder efficiency. This increase in the Information Rate comes at the expense of an increase in the carrier power to meet the threshold requirement into existing antennas. The laws of physics dictate that you cannot get something for nothing: YOU MUST REDUCE THE DOWNLINK MARGINS OR INCREASE THE RECEIVE ASNTENNA SIZE TO INCREASE THE AMOUNT OF BITS TRANSMITTED IN A GIVEN TRANSPONDER." Kevin: The caps are mine to show you where the problem may be. |
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Gold Member Username: NydasPost Number: 2942 Registered: Jun-06 | Therepo may have some more information. I am quoting below from his post in another thread. "QPSK, and 8PSK, refer to signal modulation. DN uses 8PSK turbo fec, which is why Sonicview HD and CW3000 receivers need a special add-on module for DN. Without it, Bev HD can be received in QPSK modulation (AND MPEG-2). " |
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Silver Member Username: TherepoFtaview.com Post Number: 105 Registered: May-07 | A DVB QPSK tuner can't scan 8PSK channels because they are different modulations and DN specifically has turbo-fec. Some DVB cards will demodulate on different levels, but simply, signal modulation is very specific to the tuner/chipset used for reception. Analogically, think of AM/FM radio differences, as to why 8PSK channels can't even be scanned. |
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Gold Member Username: Crazy_greekPost Number: 1002 Registered: Jul-06 | Hey Guys THANKS After reading all the above post, Iam still confuse.Nalin two (2) questions. A) How would I reduce the Downlink Margins? B) What size of Antenna would I need?thanks BTW...hey therepo are you related to the King man or are you the man? You sure sound like him. |
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Silver Member Username: HardrockstrikerPost Number: 932 Registered: Apr-06 | Hehe... |
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Silver Member Username: TherepoFtaview.com Post Number: 110 Registered: May-07 | Who is the King man?  |
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Silver Member Username: HardrockstrikerPost Number: 933 Registered: Apr-06 | the only other guy on this forum besides you who knows what the hell he's talking about |
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Platinum Member Username: LklivesPost Number: 10252 Registered: Jan-06 | OUCH! |
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Silver Member Username: HardrockstrikerPost Number: 935 Registered: Apr-06 | yes there are others. I should have mentioned them, so I apologize to all the other unsung heroes here! JB |
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Silver Member Username: HardrockstrikerPost Number: 936 Registered: Apr-06 | I was being facetious with that comment. :-p |
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