<someone-else>
lol I was right about 0402 resistors with leads soldered on after all
<someone-else>
now I'm even more interested to take a look inside HML01s
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<Bird|ghosted>
azonenberg, start judging bugs by how many bottles the baby goes thru while you're debugging them? XD
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<azonenberg>
david.lenfesty: soooo in parallel with our USB-PD idea
<azonenberg>
I want to begin exploring an alternate, mechanically compatible probe power system
<azonenberg>
namely, using vanilla usb-c (with 5V Vbus, no PD, and usb 2.0 full/high speed signalling) as a probe control interface
<azonenberg>
Advantage: it would let people plug our probes directly into a PC with no modification or special control/power hardware
<azonenberg>
which would be a bonus for things like the ThunderScope or lower end PicoScopes without native active probe buses on them
<azonenberg>
Disadvantage: might need a beefier MCU on the probe, and also requires us to put a bunch of DC-DCs in the probe which can introduce noise
<azonenberg>
I am not making a final decision at this point but I think it's worth doing at least a bit of prototyping
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<d1b2>
<david.lenfesty> huh
<d1b2>
<david.lenfesty> no idea why we didn't discuss just using USB 2.0 for the control interface
<azonenberg>
The original concern was needing a much beefier micro as well as introducing more EMI
<azonenberg>
Which are legitimate concerns
<azonenberg>
Hence why i want to prototype before making a final decision
<azonenberg>
in particular the dual rail PD is a cool idea
<azonenberg>
but it means custom hardware
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<azonenberg>
and if we want to target active probes for use with PC attached scopes, when they already have USB available
<azonenberg>
many of them may not have PD capability and certainly not our custom version thereof
<azonenberg>
so we get a lot more compatibility if we use standard usb
<azonenberg>
this does of course also mean we need embedded usb host capability for active probes on the scope
<d1b22>
<david.lenfesty> that shouldn't be too bad
<d1b22>
<david.lenfesty> we could probably slap a USB hub IC in front of the host for more ports
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<d1b2>
<david.lenfesty> (but also note I don't have the capacity for another project, school is ruining me right now)
<d1b2>
<david.lenfesty> although what I am realising is I should have finagled this as my capstone project (I was thinking I couldn't because the test board was too far along)
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<azonenberg>
well in any case, i've been busy with other stuff too
<azonenberg>
just thinking as i work on my probing lecture slides
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<bvernoux>
I need to build a good fixture to measure the 10dB Attenuator/Limiter (especially for the side 4mm banana to connect it to Port2 of the VNA)
<bvernoux>
But with a crap test done by hand I can see it is -10dB like expected
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