Compatiblity DVB-T2 1.7MHz

Discussion about the Knucker DVB-T Tuner DVB-T Receive Software. See also https://wiki.batc.org.uk/Knucker
G8GKQ
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Re: Compatiblity DVB-T2 1.7MHz

Post by G8GKQ » Fri Sep 10, 2021 8:36 pm

Hi Patrice

Thanks for letting us know that the old software works with 1.7 MHz DVB-T2 8K. Can you tell us whether the transmitter is using "Extended Carrier Mode"?

We have looked carefully at the specifications and are very puzzled!

One solution may be that we had a special 1.7 MHz DVB-T2 mode in the receiver code.

73

Dave

Patrice
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Re: Compatiblity DVB-T2 1.7MHz

Post by Patrice » Sat Sep 11, 2021 7:57 am

Hi Dave,
The modulator works in all normalized DVB-T and T2 modes with the Knucker, from QPSK to 256 QAM, and from 1K to 32 K normal or extended mode. Attached is the card documentation.
In 256 Qam mode it's works, but the software indicate 64 QAM and for extend mode is similare.

Patrice
Attachments
Minimod DVB-T2.pdf
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Patrice
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Re: Compatiblity DVB-T2 1.7MHz

Post by Patrice » Thu Sep 16, 2021 3:24 pm

Hi Dave,
I think a "Broadcast" menu and a second menu "Amateur" would be good.

Another question, would it be possible to create a file that would include all the graphics of the screen?
which will allow a specific display for each repeater ( color background, color text, text position, frequency, SR...) and this file will be not upgrade each time.

73's Patrice F1NSU

Patrice
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Re: Compatiblity DVB-T2 1.7MHz

Post by Patrice » Fri Sep 24, 2021 12:14 pm

Hi Dave,
Do you have upgrade the Knucker with DVB-T2 1.7MHz ?

73's Patrice F1NSU

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Re: Compatiblity DVB-T2 1.7MHz

Post by i2NDT » Tue Nov 02, 2021 9:39 am

sorry, forgive me...but I could not resist...

is the Knucker ready for DVB-T3??? :lol: :lol: :lol: :lol: :lol: :lol:
Attachments
DVB-T3.jpg
DVB-T3.jpg (325.43 KiB) Viewed 329 times
i2NDT Claudio
Dalmine, Italia

Patrice
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Re: Compatiblity DVB-T2 1.7MHz

Post by Patrice » Tue Nov 02, 2021 11:40 am

Hi Dave,
Do The last upgrade include 2 modes DVB-t broadcast and DVB-T amateur for 1.7 MHzBW ? (before to erase your special version)
About DVB-T3,the Chiness are really very early !!!

Patrice F1NSU

G8GKQ
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Re: Compatiblity DVB-T2 1.7MHz

Post by G8GKQ » Tue Nov 02, 2021 12:00 pm

Hi Patrice

No, I have not put that in the production build yet, so if you want to retain DVB-T2 1.7 MHz capability, please do not upgrade.

I'm thinking about how best to implement a solution. I wish that I understood the cause of the problem!

Dave

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Re: Compatiblity DVB-T2 1.7MHz

Post by G8GKQ » Tue Nov 02, 2021 12:05 pm

Before anybody asks, it appears that the term DVB-T3 is a marketing term being misused to push Chinese receivers into countries switching to DVB-T2.

Dave

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