00:00 <fridtjof[m]> but it's kind of 1) hacked together 2) broken, but i don't really know if that's my fault or just picobridge's own bugs from what i've just read :D

00:01 <fridtjof[m]> ah, right, it was a picoscope 5203

00:02 <fridtjof[m]> So, I'd like to upstream that support ideally, but i'm not sure if there's some major refactoring planned in the future to make accomodating more SDKs a bit easier than extending switch statements all over the place or something (the APIs are very similar between the two SDKs, yet subtly different at the same time)

00:29 <azonenberg> fridtjof[m]: We do want to clean things up and there was some work in that direction being done by xzcvzx

00:29 <azonenberg> who seems to have disappeared from the channel

00:29 <azonenberg> he was working on recent 5000 series support as well iirc

00:29 <azonenberg> So i would say for now, assume that's not going to happena

00:30 <azonenberg> and if he comes back, you two can figure out how to reconcile any merge conflicts

00:30 <azonenberg> among many other things, ps6000d needs to be renamed to reflect the fact that it's not just for 6000 series anymore

00:30 <azonenberg> and we need end user documentation for the bridge

00:31 <azonenberg> And it, plus the libscopehal side driver, need a lot of debugging and tuning

00:52 <fridtjof[m]> sounds good. next time i'm at the space i'll clean up the code, and test it a bit more, then put out a PR :)

16:58 <azonenberg> woo, just got ebay shipping notice

16:58 <azonenberg> my second D420 is on the way

16:59 <azonenberg> For something like 60% off list price. It was last calibrated in 2013 so it might have drifted a bit, but it's only like $250 to re-cal it

17:00 <azonenberg> And if i don't care about traceability I have everything i need to characterize it here and verify the frequency response etc :p

17:37 <someone-else> azonenberg: I wonder if it sends calibrated de-embedding data to the scope via probus and if there is a way to turn it off to see how the actual hardware performs

19:25 <Degi> If its some standardized connector then maybe a short stub so that the pins dont touch?

19:32 <electronic_eel> usually the "smart" probe connector buses on scopes are just pogo pins poking out of the probe-side of the interface. on the scope side they are gold plated pads on the front. so you can easily put some kapton tape over the pads and it is offline

20:37 <someone-else> this has a non-zero chance to kill the probe though.. perhaps probe correction could be turned off somewhere in the scope menus?

21:32 <azonenberg> The ProBus connector is six pins: ring, ground, +/- 12V power, and I2C

21:32 <azonenberg> you can dump the eeprom

21:33 <azonenberg> If you mitm the BNC by opening up the wavelink cable you can mitm the connection and VNA the raw amplifier head

21:33 <azonenberg> Which i've done

21:33 <azonenberg> I know for a fact that the scope does de-embedding, i think for the lower end probes it's a single global rule and for the fancier ones it's per amplifier/tip calibrated

21:38 <azonenberg> electronic_eel: ProBus is 2mm pitch, iirc, 2x3 round machine pins on the probe and a female socket scope side

21:38 <Degi> What is ring?

21:38 <azonenberg> its weird and hard to find something that mates to it

21:38 <azonenberg> Degi: the ID ring that goes around the BNC, for using a resistor to ground to ID passive probes

21:38 <azonenberg> so for a simple passive adapter you dont have to put an eeprom in it

21:38 <Degi> Ah neat, so you know which probe is which channel

21:39 <azonenberg> no it's for setting gain/attenuation

21:39 <Degi> I see

21:39 <azonenberg> so you can tell a 1x probe from a 10x or a 20x automatically

21:39 <azonenberg> without manually configuring the scope

21:39 <Degi> Practical

21:39 <azonenberg> each probe has a little pogo pin on the BNC shell

21:40 <azonenberg> that connects to the ring and identifies it

21:40 <azonenberg> someone somewhere has posted a table of all known resistance-to-attenuation values

21:40 <Degi> Hm yes, just found that

23:27 <azonenberg> So my ebay'd wavelink probe tip came in earlier today

23:27 <azonenberg> i paid something like a quarter of list price, it's hardware rev A rather than the current E

23:28 <azonenberg> and appears to be mint condition NOS

23:28 <azonenberg> the tip resistors don't even have any solder on them

23:28 <azonenberg> and the accessory bag is still heatsealed

23:28 <azonenberg> I don't think it was ever used

23:28 <azonenberg> no evidence of damage and rise time etc are all in spec