Приём и обсуждение - Türksat 4B

[wellikan]

Проблема не проигрывателе , а в видеокарте

[wellikan]

Не получается увидеть стабильную картинку с транспондера 11624 Н 19980 ACM/VCM Multi 254

[satesco]

Проблема не проигрывателе , а в видеокарте

Indeed,there are no images for 8k now at 50.0E because it is not transmitted although the parameters remained the same.

[VictorLS]

satesco
Thanks
Зато ошибки ушли ;)
Есть куча PID'ов в IP/DVB Mode, но ни одного активного:

[satesco]

50.0E_Turksat 8K_Test is back



Added in 3 hours 18 minutes 14 seconds:

added:
Those who want to see Turksat_8K_Test from 50.0E,can download from here.

[VictorLS]

satesco
Thanks. I'll download your record when I can.
It seems TBS 5520SE gets wrong parameters or can't set right parameters because of not professional card (I believe BER=0 is wrong too):

Btw now 8K has gone again - same screenshot viewtopic.php?f=165&t=779&start=10#p27630

[satesco]

50.0E_8K tested a few minutes ago.HWInfor for CPU(IntelCore i7-7700) and GPU(GTX 1060 6GB Aero) used for this kind of stream:

[dreamsat]

Здравствуйте VictorLS,
да, он работает с обеими картами TBS 6983 и TBS 6522. Проблема с 32 APSK заключается только в том, что для его просмотра требуется минимум 13 дБ MER.
К сожалению, если поток работает на TBS 6522, он больше не будет отображать MER.
Большой привет

[satesco]

Hi VictorLS,

For good reception of the 8K stream at 50.0E,two very important conditions must be met in order for the stream to run smoothly:
1.Strong signal,I say,SNR at least 13 dB,but better,over 15 dB,so as not to lose packets from the stream.So BER to be at zero,if possible.I add another helpful condition,namely,a PLL lNB to maintain the signal at the same level when the signal fluctuates a lot.That's why BER grows and packets are lost,which causes the image to freeze or disappear.
2.And for PC:Power processor,an i7 CPU,and the same high power graphic card.
Dreamsat's tests are correct.Indeed Silab demod for 6522 do not display SNR as STV0910 demod for 6983. When the signal is not strong enough, errors occur in such a stream.
I've done tests with tbs6590 and tbs6522 cards which have the same Silab demod.
With tbs6590 card running on a computer with CPU Intel i7 and graphic card GTX 1060,the image runs smoothly without any interruption or freezing.While with 6522 card on a PC with CPU Intel i5 and GTX 460,the image blurred or fade.At such a resolution it was hard for the image to be smooth all the time.
Here are the tests made with the two Silab demod/cards(6590 & 6522) on computers with different CPUs and GPUs:
tbs6590_CPU-i7 and GTX1060:



tbs6522_CPU-i5 and GTX 460:

[VictorLS]

1.Strong signal,I say,SNR at least 13 dB,but better,over 15 dB,so as not to lose packets from the stream.So BER to be at zero,if possible.I add another helpful condition,namely,a PLL lNB to maintain the signal at the same level when the signal fluctuates a lot.That's why BER grows and packets are lost,which causes the image to freeze or disappear.

It's a pity in Russia I couldn't find any new and good enough PLL LNB so I've bought old Inverto Black Ultra (without 4G protection - couldn't find new with 4G protection too) - signal becomes some stronger (14dB) but receiving without changes - seems TBS 5520SE can't receive 32APSK with such high bitrate well - 16APSK from 42e with same bitrate is receiving well enough but with audio stuttering after ~ minute (old records from 42e are played in app SmartDVB well).