Jim,
Can you say something more about what you see as the failings of the AIM.
I was impressed by how my AIM handled high impedances. If I calibrate it
carefully, and then measure a 10k resistor, the AIM predicts a parallel
equivalent of 10k//0.2pF with less than 5% variation anywhere in the
range 1-30MHz.
73,
Steve G3TXQ
Jim Brown wrote:
> High impedance measurement on a traditional vector analyzer can be
> tricky, as noted in my section on measurement. :) Reflection-based
> measurements yield considerable error, because the unknown Z is too
> far from the 50 ohm circuit Z. HP addresses this in one of their app
> notes on Z measurement. That's the failing of the AIM unit.
>
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