hmm, i think there's something wrong with this etch a sketch

This weekend I added support for the Agilent 86100A sampling scope to glscopeclient/scopehal, along with support for GPIB adapters using the linux-gpib library. Here it is showing a 10Gbps eye diagram 🤩

and it's all good again! 🎉

I tested across the switch that selects between inputs and there's definitely a fault in it, but it's got a spare input! So I swapped the cable over and modified the control cable to swap the signals

Tracking down an issue where my sampling scope wouldn't trigger on one of the inputs. VNA trace suggests there's a hairline break somewhere, since there's a lot of loss at low frequencies but S21 increases with frequency (due to capacitive coupling):

.@sharebrained's PortaPack plectrum: also handy for demoulding

coffee

I'm working on reverse-engineering a pager codeplug format and I wrote a handy little script to help. It constantly watches the save file for changes and prints a diff:

Just doing my due diligence before getting a new piece of test gear... 😇

Also just tried out some different drive settings, here's 46ohm and 67ohm:

It's maybe reduced a little bit on the other side of the resistor, this is from probing on that resistor pack RAM-side then FPGA-side respectively:

and with captures from that, I wrote a HyperRAM protocol decoder for glscopeclient (and added support for digital channels on Agilent/Keysight scopes!)