azonenberg changed the topic of #scopehal to: libscopehal, libscopeprotocols, and glscopeclient development and testing | https://github.com/azonenberg/scopehal-apps | Logs: https://freenode.irclog.whitequark.org/scopehal
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<azonenberg_work> https://www.youtube.com/watch?v=sm-UYo6erCo Livestreaming debug of AKL-PT2 process variation if anybody wants to join
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<azonenberg> Soooo
<azonenberg> Soooo
<azonenberg> conclusion from the stream: my yield might be better than i thought
<azonenberg> conclusion from the stream: my yield might be better than i thought
<azonenberg> it seems a significant amount of the variability is actually related to how the tip is soldered to the dut
<azonenberg> it seems a significant amount of the variability is actually related to how the tip is soldered to the dut
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<azonenberg> lain, monochroma: second conclusion from the stream, the ripples at higher freq do not seem to be caused exclusively by bad sma soldering
<azonenberg> lain, monochroma: second conclusion from the stream, the ripples at higher freq do not seem to be caused exclusively by bad sma soldering
<azonenberg> or bad resistor soldering/alignment
<azonenberg> or bad resistor soldering/alignment
<azonenberg> i made one probe with very carefully fine tuned placement of both sma and resistor, even hacked up a jig to hold the sma during soldering
<azonenberg> i made one probe with very carefully fine tuned placement of both sma and resistor, even hacked up a jig to hold the sma during soldering
<azonenberg> sanded the edge of the board so i'd have copper right to the edge
<azonenberg> sanded the edge of the board so i'd have copper right to the edge
<azonenberg> I got a good 6 GHz probe, but not significantly better than the other ones
<azonenberg> I got a good 6 GHz probe, but not significantly better than the other ones
<azonenberg> the higher freq ripples were still there
<azonenberg> the higher freq ripples were still there
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<lain> interesting
<lain> interesting
<azonenberg> david.lenfesty: hey, any updates on that probe debug?
<azonenberg> david.lenfesty: hey, any updates on that probe debug?
<azonenberg> if you're still stuck. can you send me some hardware so i can investigate?
<azonenberg> if you're still stuck. can you send me some hardware so i can investigate?
<azonenberg> lain, monochroma, miek: thoughts on this fixture?
<azonenberg> lain, monochroma, miek: thoughts on this fixture?
<monochroma> azonenberg: is there a label spot on the back for SN?
<monochroma> azonenberg: is there a label spot on the back for SN?
<monochroma> also, do you want to go with those SMAs (that have been giving you some problems) or go with higher end ones that should be more consistent ?
<monochroma> also, do you want to go with those SMAs (that have been giving you some problems) or go with higher end ones that should be more consistent ?
<d1b2> <david.lenfesty> yeah, still a little stuck, school has been especially draining. I'm planning on trying to port the graycatlabs arduino lib tomorrow and trying that out
<d1b2> <david.lenfesty> yeah, still a little stuck, school has been especially draining. I'm planning on trying to port the graycatlabs arduino lib tomorrow and trying that out
<azonenberg> monochroma: on the fixture, no serial number spot
<azonenberg> monochroma: on the fixture, no serial number spot
<d1b2> <david.lenfesty> I can probably get into town monday to send one of the boards over
<d1b2> <david.lenfesty> I can probably get into town monday to send one of the boards over
<azonenberg> I'll be cal'ing each fixture individually
<azonenberg> I'll be cal'ing each fixture individually
<d1b2> <david.lenfesty> I'm fairly convinced the USB C side is fine, just must be missing something from the firmware side of it
<d1b2> <david.lenfesty> I'm fairly convinced the USB C side is fine, just must be missing something from the firmware side of it
<azonenberg> and i'm sticking with these SMAs. I don't actually think they are the problem
<azonenberg> and i'm sticking with these SMAs. I don't actually think they are the problem
<d1b2> <david.lenfesty> I did find out I chose the wrong VBUS switch IC, turns out it's a comparator enable, not logic enable, so I would need >5V to switch it
<d1b2> <david.lenfesty> I did find out I chose the wrong VBUS switch IC, turns out it's a comparator enable, not logic enable, so I would need >5V to switch it
<monochroma> azonenberg: i would suggest a SN# spot so if you have issues with a fixture, you can log it, and keep track of it (and RE any issues at a later date)
<monochroma> azonenberg: i would suggest a SN# spot so if you have issues with a fixture, you can log it, and keep track of it (and RE any issues at a later date)
<azonenberg> I'll jsut stick a label on
<azonenberg> I'll jsut stick a label on
<azonenberg> But for the short term i will only have one assembled fixture at a time
<azonenberg> But for the short term i will only have one assembled fixture at a time
<azonenberg> i'll get 3 from oshpark, populate one, keep the other 2 in reserve
<azonenberg> i'll get 3 from oshpark, populate one, keep the other 2 in reserve
<azonenberg> and only populate the others if this one breaks
<azonenberg> and only populate the others if this one breaks
<azonenberg> i normally only serialize things where i expect to have >1 of them in existence at a time
<azonenberg> i normally only serialize things where i expect to have >1 of them in existence at a time
<_whitenotifier-4> [starshipraider] azonenberg pushed 1 commit to master [+5/-0/±0] https://git.io/JmHtM
<_whitenotifier-4> [starshipraider] azonenberg pushed 1 commit to master [+5/-0/±0] https://git.io/JmHtM
<_whitenotifier-4> [starshipraider] azonenberg c2d9ea6 - Initial AKL-PT2 test fixture
<_whitenotifier-4> [starshipraider] azonenberg c2d9ea6 - Initial AKL-PT2 test fixture
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<_whitenotifier-4> [starshipraider] azonenberg pushed 1 commit to master [+0/-0/±1] https://git.io/JmHqV
<_whitenotifier-4> [starshipraider] azonenberg pushed 1 commit to master [+0/-0/±1] https://git.io/JmHqV
<_whitenotifier-4> [starshipraider] azonenberg 79e5601 - Moved terminating resistor so we don't have vias in pads
<_whitenotifier-4> [starshipraider] azonenberg 79e5601 - Moved terminating resistor so we don't have vias in pads
<d1b2> <david.lenfesty> azonenberg: idk how much you mind non-functional power supplies, the AP6502s seem to be super fragile, I got some more to figure out what's killing them, but I don't think I would reasonably have time to do so and ship it relatively soon
<d1b2> <david.lenfesty> azonenberg: idk how much you mind non-functional power supplies, the AP6502s seem to be super fragile, I got some more to figure out what's killing them, but I don't think I would reasonably have time to do so and ship it relatively soon
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<azonenberg> Send what you can get, i'll do some investigation once i have hardware
<azonenberg> Send what you can get, i'll do some investigation once i have hardware
<azonenberg> monochroma: ok ordered that fixture, it was only $10 for 3
<azonenberg> monochroma: ok ordered that fixture, it was only $10 for 3
<azonenberg> need to get a bunch more SMAs but i think i will use that for my next production batch and see what happens
<azonenberg> need to get a bunch more SMAs but i think i will use that for my next production batch and see what happens
<d1b2> <david.lenfesty> okay sounds good. would I just send it to the address on antikernel.net?
<d1b2> <david.lenfesty> okay sounds good. would I just send it to the address on antikernel.net?
<azonenberg> No, that's a PO box a friend hosts for me and probably only checks once a month
<azonenberg> No, that's a PO box a friend hosts for me and probably only checks once a month
<azonenberg> Not sure how discord-to-irc handles PMs but DM me on twitter and i'll get you a more direct shipping address?
<azonenberg> Not sure how discord-to-irc handles PMs but DM me on twitter and i'll get you a more direct shipping address?
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<d1b2> <david.lenfesty> will do
<d1b2> <david.lenfesty> will do