azonenberg changed the topic of #scopehal to: libscopehal, libscopeprotocols, and glscopeclient development and testing | https://github.com/glscopeclient/scopehal-apps | Logs: https://libera.irclog.whitequark.org/scopehal
<azonenberg> woo
<azonenberg> hello discord land, welcome back! It's been a while
<_whitenotifier-7> [scopehal-apps] azonenberg commented on pull request #469: Windows/Vulkan build fix - https://github.com/glscopeclient/scopehal-apps/pull/469#issuecomment-1216038795
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<azonenberg> Cables for the AKL-PR1 showed up
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<d1b2> <azonenberg> Best PR1 prototype response to date
<d1b2> <azonenberg> It looks worse than it is, the high freq ringing is because i'm stimulating the probe with a 40ps pulse and it has some high pass effects going on. I'm going to add a ~500 MHz LPF in the next board rev which should smooth it all out
<azonenberg> the reflection at ~10ns is off the end of the BNC as far as i can see, the compensation circuit doesn't actually do a ton to get rid of it. I'm going to see if there's anything i can do about that but not super hopeful
<azonenberg> it's intrinsic in all R-C divider probes although this is a bit more evident than usual
<azonenberg> Looking at the time and frequency domain traces aligned, i'm pretty sure the ripple in the S21 plot is caused by that reflection at ~10ns
<azonenberg> causing destructive interference with the incident signal
<azonenberg> the challenge is going to be figuring out what to do about it
<_whitenotifier-7> [scopehal] azonenberg pushed 1 commit to master [+0/-0/±3] https://github.com/glscopeclient/scopehal/compare/33fcd62bb1d2...fbb6b7b0110b
<_whitenotifier-7> [scopehal] azonenberg fbb6b7b - AcceleratorBuffer: support allocating pinned memory CPU-side
<_whitenotifier-7> [scopehal-apps] azonenberg pushed 1 commit to master [+0/-0/±3] https://github.com/glscopeclient/scopehal-apps/compare/3e917135347a...3adbb800cf1b
<_whitenotifier-7> [scopehal-apps] azonenberg 3adbb80 - Added unit test for pinned CPU-side memory
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<_whitenotifier-7> [scopehal] azonenberg pushed 1 commit to master [+0/-0/±1] https://github.com/glscopeclient/scopehal/compare/fbb6b7b0110b...404a1d21d21e
<_whitenotifier-7> [scopehal] azonenberg 404a1d2 - Implemented FreeCpuBuffer, more general work on buffer management
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<azonenberg> New r v AD4 and PT5 boards arrived
<azonenberg> rev*
<azonenberg> Assembling after work
<azonenberg> Next AV1 rev is still a little ways out
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