<marcos__>
yeah let me know if I can help. When I run it remotely it also hangs, but not instantly like in the LAN
<azonenberg>
Interesting. Probably something that happens after X number of waveforms and over remote the higher latency keeps it alive for a bit
<azonenberg>
I'm just busy with lots of other stuff, idk if you saw some of my tweets about it but i'm at the tail end of a major renovation of my house/lab
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<marcos__>
not really a twitter a user. I hope the renovation is coming along nicely. Summertime is coming, makes it easier to work in the house
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<bvernoux>
hi
<azonenberg_work>
o/ bvernoux
<bvernoux>
hello
<azonenberg_work>
So i did a test with a 200R resistor and the signal looks perhaps a bit cleaner
<azonenberg_work>
but still not what i want
<azonenberg_work>
(on the probe)
<azonenberg_work>
Do you want me to send over the stuff i have now to you, or debug more?
<bvernoux>
do you have used special RF resistor ?
<azonenberg_work>
vishay FC series flip chip
<bvernoux>
ok
<bvernoux>
I can continue in // the test
<bvernoux>
if you find something better I will do the modifications
<azonenberg_work>
it's slow progress because the house project is eating up much of my time and i still dont have a fully set-up lab
<azonenberg_work>
I'll pack things up and mail to you shortly then
<bvernoux>
yes no problem there is no hurry
<bvernoux>
I'm waiting my calibration kit for the VNA to do serious measurements ;)
<azonenberg_work>
remind me what you wanted as far as probes go? i have two bare probe pcbs and one 3d printed enclosure right now, plus the other boards we talked about
<bvernoux>
as it is a bit a joke to use random short/open/load ;)
<azonenberg_work>
did you want one or both assembled?
<bvernoux>
sold 5usd on Ebay ;)
<azonenberg_work>
just use a piece of wire and a 50 ohm carbon resistor from an old tv
<bvernoux>
do like you can
<azonenberg_work>
that should be good enough right?
<azonenberg_work>
put them on a breadboard with a couple of dip switches to mux between them
<bvernoux>
I will check what I need to buy again to assemble the other boards too
<bvernoux>
I have wrote a document for that ;)
<azonenberg_work>
lol
<bvernoux>
as there is lot of stuff for different boards ;)
<azonenberg_work>
yeah theres a fair bit of stuff
<bvernoux>
I have lost so much time yesterday soldering 3 boards with awfull qfn ;)
<bvernoux>
next time I will let do that job to manufacturer they are really better ;)
<bvernoux>
anyway because of that (because of soldering bridges) I have done a cleanup on my PCB routing to avoid that ;)
<bvernoux>
also my stencil height was too big and there was too much solder paste and so bridges on QFN ...
<azonenberg_work>
10G is 64/66b so all LFSR scrambled even for idles
<azonenberg_work>
my test signal generator is an artix7 gtp so max of 6.6 Gbps, and my scope is only 1 GHz bw so nyquist at 2 Gbps
<azonenberg_work>
test pattern now is 1.25 Gbps
<azonenberg_work>
The probe i'm using now is configured roughly the same as a Pico 916
<azonenberg_work>
in terms of attenuation/impedance
<azonenberg_work>
pico's version claims to be good out to 5 GHz
<azonenberg_work>
bvernoux: also idea: if we can measure s-parameters on my probes with your VNA
<azonenberg_work>
Might it be possible to use an FFT+iFFT to flatten out the response in post?
<bvernoux>
yes I will try your probe to measure s-parameters with my VNA
<bvernoux>
it was the idea to use it for that too
<bvernoux>
It is why I want to charaterize it up to 6GHz ;)
<azonenberg_work>
:)
<bvernoux>
30KHz to 6GHz with an extract of data to s1p
<azonenberg_work>
awesome
<bvernoux>
I'm still searching a good tool to visualize Touchstone S1p/S2p files
<bvernoux>
which also support marker and math computation for capacitance...
<bvernoux>
anyway I'm working on a gui tool with Qt to do that and retrieve directly VNA data ;)
<bvernoux>
to->tool
<bvernoux>
I can already retrieve all data like form1, form4 ... ;)
<bvernoux>
now need to convert them to s1p or even s2p for full 2ports measurements (s11, s21, s12, s22)
<bvernoux>
I'm planning to also add my Signal Generator to manage it from the gui ;)
<bvernoux>
all are GPIB
<azonenberg_work>
I want to integrate a signal generator controller API/UI with glscopeclient
<azonenberg_work>
because i need to control scopes that have integrated signal gens
<azonenberg_work>
and most cannot support two separate connections (one for scope, one for siggen) at once
<azonenberg_work>
So i need to do both over the same socket
<bvernoux>
yes will be very nice
<azonenberg_work>
short term, scopehal has an API for siggens already (though it does not currently support AWG, only sine/square and a few other shapes)
<azonenberg_work>
But there's no UI to invoke it
<azonenberg_work>
But if you add your generator to scopehal with that API it will work once i make a UI
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<bvernoux>
yep nice feature
<bvernoux>
I still do not really know how to interface in a clean way with scopehal ...
<bvernoux>
especially as my instruments are USB or USB GPIB so far
<bvernoux>
USB GPIB is mainly using VISA dll
<azonenberg>
Yeah i havent tried integrating with visa yet
<azonenberg>
it's all been custom drivers
<azonenberg>
mostly because existing SDKs were either nonexistent, or awful
<azonenberg_work>
bvernoux: Thoughts on respinning the probe design with a bunch of 200R resistors in series?
<azonenberg_work>
say, five end to end for 1K total
<azonenberg_work>
this should be much flatter than using a 1K because less pad-to-pad capacitance
<azonenberg_work>
but i'm not sure how this would work because it would no longer be a lumped component
<bvernoux>
yes will be interesting to simulate it
<bvernoux>
if you have the characteristics of the res