I suppose the checksum of the "crypted word", the key itself, that goes to ProgDVB from plugin to descramble the encoding.

here's what it looks like from plugin side:

00:20:02.750: Ch: 126 - 2X2
00:20:02.750: PMT: 007E(126), SID: 0722(1826)
00:20:02.846: ***** PMT found... [007E] *****
00:20:02.846: ***** ADD ECM [101E][0500/00040610] *****
00:20:03.301: ***** CAT found... [0001] *****
00:20:03.311: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:20:03.312: 0 O: :5FEA0CB383179103
00:20:03.313: 0 E: 0EE5A4717C60A82F:
00:20:06.894: newcamd 0: ECM [101E][0500/00040610/0B01] found (325)
00:20:06.895: 0 O: :E4F7DF23CCEE7689
00:20:16.899: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:20:16.900: 0 E: B57708C8A99A1BCB:
00:20:26.908: newcamd 0: ECM [101E][0500/00040610/0B01] found (325)
00:20:26.909: 0 O: :3F0B6B8B79D5ABF0
00:20:36.924: newcamd 0: ECM [101E][0500/00040610/0B01] found (327)
00:20:36.925: 0 E: 2E3AF8CDBB1B179A:
00:20:46.976: newcamd 0: ECM [101E][0500/00040610/0B01] found (325)
00:20:46.977: 0 O: :64A914D7DF8E129C
00:20:56.990: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:20:56.991: 0 E: 81C2E43149ACEE0D:
00:21:07.012: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:21:07.013: 0 O: :2447E29931718A83
00:21:17.090: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:21:17.090: 0 E: CF35A0B825AFBA91:
00:21:27.096: newcamd 0: ECM [101E][0500/00040610/0B01] found (324)
00:21:27.096: 0 O: :840A65B714567744

even/odd CW's are received by ProgDVB from plugin evety 10 seconds.
may there be any additional procedure that checks the CW inside ProgDVB engine before sending it to descrambler?

it is not a bad idea to do such a testing so that no junk goes to descrambler, but since the guys at Viaccess decided to disable it - that is not a straight rule any more, I think.

maybe there's a way that we can troubleshoot this behaviour by compiling a test-version that will log down everything that is being received from plugin and what comes to descrambler at the final step? it may be helpful, at last.

Is it working with DVBJCAM and ProgDVB?

How do I check checksum? What is it equal to?

Try prerelease. Special on old plugins and channels. New version could break old cases.

WOW!!!! ProgDVB7.43.9b.Pro opens the picture!
threre's a audio track glitches - a problem that wasn't noticed before, but that may be other sort of bug:
https://youtu.be/_DvRTmrUee8
the recorded ts-file doesn't have the glitches and plays smooth.

May be you you not test this channel in old versions?
Sync problem not depended from plugins. Depended from demux and audio renderer (and audio driver)

old versions did not work - that's testet not just by me.

we can switch to Russian and go to skype.
I am, able to grant you access to my very local system that I use to watch my own NTV+ subscription so that you may do all of the inversigation "on the fly".
throw me a letter to profile email.

Check settings of ProgDVB (must be ProgDemux, some good codecs for example LAV, etc). And send me logs if still problem with. I think need other thread for discus about that.