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
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<azonenberg> So this is interesting https://www.ebay.com/itm/165833385954?hash=item269c70a7e2:g:MaYAAOSwAKBjmdqL
<azonenberg> not because it's a siglent sds2354x+
<azonenberg> but because it's for sale *by LeCroy*
<d1b2> <Darius> huh weird
<d1b2> <azonenberg> So my directional coupler came in
<d1b2> <azonenberg> and I have some really cool data using it plus my 16 GHz scope
<d1b2> <azonenberg> Here's a TDR plot of a LeCroy PCF200 fixture. Looks like the thru line is slightly low of the exact 50 ohm impedance, then the SMA female connector (left) is too high and the SMA male (right) is even higher
<d1b2> <azonenberg> And here's the exact same test setup at the same scale with an AKL-PT5 across the thru line
<d1b2> <azonenberg> you can see it brings the 50 ohm line's impedance down to around 45 at the point of probing
<d1b2> <azonenberg> Which is exactly what the parallel resistor equation predicts for a 500 ohm load
<d1b2> <azonenberg> @MP ^
<d1b2> <azonenberg> It's not a fancy WavePulser but it's a lot better than no TDR or the hackjob I was using before using a SMA tee without any directivity
<d1b2> <azonenberg> and gives me double the measurement bandwidth of my 8.5 GHz VNA (but it only goes down to 500 MHz)
<d1b2> <azonenberg> (also, I really need to implement memory traces so I can stack a before/after plot on the same window)
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<d1b2> <MP> @azonenberg looking pretty niceeeee
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