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bvernoux>
azonenberg, I have found very nice passive probe up to 12GHz for 260USD
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bvernoux>
will be interesting to check that ;)
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bvernoux>
they use 450 ohm resistive element but they do not details if it is multiple res ...
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azonenberg>
bvernoux: ooh i'll look...
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azonenberg>
is that a ballpoint pen body? lol
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bvernoux>
yes maybe ;)
<
bvernoux>
anyway very interesting to check it ;)
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bvernoux>
especially as they promise it work up to 12Ghz and I have never see that with any passive probe
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bvernoux>
In my case I'm mainly interested up to 6GHz ;)
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bvernoux>
but more is better
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monochroma>
does it come with a verification test sheet?
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bvernoux>
it seems it does not come with any test sheet :(
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bvernoux>
but they have some "generic" measurement
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azonenberg>
It looks too flat
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azonenberg>
which makes me suspicious
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bvernoux>
I will buy one to characterize it and to compare with azonenberg probes ;)
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bvernoux>
yes it seems to good to be true
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azonenberg>
yeah i still have that pile of boards to send you
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bvernoux>
especially the TYPICAL P-20B RF PROBE RESPONSE
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bvernoux>
only 3dB ;)
<
bvernoux>
with direct barrel grounding response
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bvernoux>
near 7 or 8GHz ...
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bvernoux>
even the short ground clip seems to good to be true
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bvernoux>
-3dB worst case ...
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bvernoux>
near 11GHz
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bvernoux>
flexible GND clip is bad after 1GHz which seems normal case ...
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bvernoux>
=> If the signal source IS terminated into 50 ohms, the measurement error is due to the P-20A -.2 dB loading
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bvernoux>
so only -0.2dB measurement error is amazing ...
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bvernoux>
spectrum analyzer give an error of +/2dB error ;)
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bvernoux>
it is not the same but 0.2dB is very low amazing
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bvernoux>
no in fact good spectrum analyzer have +/-0.7dB error ;)
<
bvernoux>
I'm checking the Signal Hound BB60C ;)
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bvernoux>
seems to be one of the best for the price which reach 6GHz
<
bvernoux>
also sweep speed of 24GHz/s is amazing ;)