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I'm a big fan of "test it like you use it" and this ain't that.
More like, "test it like somebody real stupid with an
awfully long roll of wire might possibly use it someday".
But I think that, knowing this sensitivity, your application
notes (if any) and spec ought to declare an upper bound...
You may have some kind of "lock-file" problem.
ps -u {userName} should show you all running PIDs.
I do not know how ADE locks sessions but you might
look in and under the run directory for "mystery files"
whose name suggests such a role. \
Or just get out of ADE and start over with a clean...
I've seen load pull bench setups which looked "almost
homemade" (manual crank inductor etc.). But these do
not give you a nice front panel L value you can believe
in - more like, twiddle to the magic point and then measure
"what you did" on the jig minus the DUT.
These evidently were so...
That is one way, but then the "X" would appear following
a clock / latch edge, from a previously unkown datum (or,
clock / latch state itself, being unknown).
If the DIP16 "module" is a standard 300mil width, 100mil pitch then consider ripping off a 74xx logic part of proper size for the geometry stuff and fix the pin names?
Failure-to-follow might be from an overloaded output
or bad bias rails or a bad input common mode position
or....
Debug time, not rando wild guess time.
VGND through 1Mohm will surely hurt the isolation amplifier's
HL slew and if the coupling is capacitive, you need slew rate
clean inside.
You must represent the two grounds locally-correct (per part
operational needs) and then represent the connection between
domains - shared earth, vacuum...
The rectifier matters, a lot.
Old true crystal radios used galena (PbS, a natural II-VI semiconductor) as a point-contact Schottky diode of low Vf and low shunt-C.
In the '70s I had one of those "spy pen radios" from the back of a magazine. Probably a germanium diode there, silicon costs you...
Last I looked at this was a couple of decades back
for RFID tags, at RX power levels you will lose all
the energy just trying to climb that front diode's
I-V curve and fall back. A charge pump is not the
same thing as a detector, and you are looking to
pull energy from as close to zero...
The trick for analog design would be to maintain constant
amplitude over varying frequency. And of course small
matters like intial accuracy, stability, distortion, drift with
environmentals, supply ripple FM-ing the output tone, etc.
If you wanted it all, something like an ADC feeding a
PLL...
The guts look like a 1-channel LM139. Nothing but a bare lateral PNP base contact at the input pins (and a back diode to help with "soft ESD" hot carrier drift). But by their nature the LPNP base also has the fat tank-iso junction which is fortunate for negative-going ESD and somewhat robust...
If it's a straight rip-off of LM331 then it may not have any ESD circuitry at all. Old standard linear bipolar parts just "took their lumps", lacking thin oxides and having large device sizes.
How much do you care about the voltage value and pulse flat-top?
Given that you want this capacity from the power supply and caps and no added circuitry the acceptable loaded droop at current for time gives you the bulk C value by the basic equation.
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