[Amps] Load Pulling

[bumerang boom]

Hello, one and all.
I need to characterize the output an unusual AMP. It
outputs a 20nS 70Square pulse every 500nS.
I would like to measure it's output complex impedance
but
I  am not sure if the usual equipment like an antenna
tuner and a SWR meter will indicate correct values.

Can any one help with ideas in the test bed
construction?
Any help will be greatly appreciated.

N2NNU


       
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