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Mai 01, 2017, 04:23:21 am
Sundtek Support ForumEnglishSundtek SkyTV UltimateUnknown modulation?
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Autor Thema: Unknown modulation?  (Gelesen 389 mal)
Tryon
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« am: Februar 09, 2017, 10:42:29 pm »

Hi,

I know this is unlikely, but some users may encounter undefined modulation in blindscan.
Read signal should display 8-PSK and 16-APSK(although real property names are PSK_8 and APSK_16).

Best part in all this is that somehow it is possible to receive such broadcasts in Tvheadend. Cool

Thanks.
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« Antworten #1 am: Februar 10, 2017, 12:27:33 am »

Where do you see unknown modulation?

Can you put a screenshot online?

Our blindscan does not have unknown modulation implemented as far as I see.
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Tryon
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« Antworten #2 am: Februar 11, 2017, 08:13:29 pm »

Thanks. I will wait for next opportunity. In any case, tool will not recognize 16-APSK.
Manual tuning also can be expanded -M modulation (QPSK, 8PSK,...)
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Tryon
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« Antworten #3 am: Februar 19, 2017, 03:59:53 pm »

Code:
FEC: FEC_AUTO MOD: UNKNOWN VOLTAGE: V(13V) TONE: ON
Can we have POL: V instead of voltage?

It is also interesting to read research article about DVB-S2X:
Zitat von: Development of satellite high-definition television in Europe
In order to ensure transmission of the greatest possible number of HDTV and UHDTV channels via satellites, it is necessary to convert the satellite DVB-S transponders to DVB-S2 transponders. Conversion to the 16APSK modulation will result in the increased capacity for HDTV channels. Furthermore, in order to use satellite capacity as cost effectively as possible, the MPEG-4 compression standard should also be used for the transmission of SDTV channels.
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