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> Yeah. In general i'm just trying to avoid interconnect hell like proprietary active probes have
<azonenberg> u.fl is something you can easily buy COTS in qty 1
Degi_ has joined #scopehal
Degi has quit [Ping timeout: 268 seconds]
Degi_ is now known as Degi
<azonenberg> Ok baby is in bed and i opened the oshpark envelope, i have three probe tip characterization boards
<azonenberg> Time to have some fun
<azonenberg> Veeeeery interesting...
<d1b2> <azonenberg> Ok so, first things first: new LeCroy solder in tip resistors and our 100 ohm HMLs are very close. Old LeCroy solder in resistors are slightly off, but not by a lot
<d1b2> <azonenberg> old in blue, new in red, HML in green
<d1b2> <azonenberg> second: new fixture gives data i actually have some confidence in. the old one was garbage. old in red, new in blue. Tl;dr the poor return current path on the old fixture ruined the data
<d1b2> <azonenberg> next, the 450Ω HML is excellent for lower freqs: -14.5 dB +/- 0.5 dB from DC to about 5.5 GHz. Then it starts climbing sharply
<d1b2> <azonenberg> this is why the PT5 had to add a lowpass filter