Hi:

A reflection type network analyzer is very good for measuring impedance near 50 Ohms and gets poorer and poorer as the impedance moves away from 50 Ohms.  So that's not a good way to make your hi-Z measurement.  See:  http://www.pacificsites.com/~brooke/Z.shtml & http://www.pacificsites.com/~brooke/4395A.shtml

For plotting the impedance of things like 32768 Hz watch crystals the only impedance analyzer (an analyzer has a graphical display) I know of is the HP 4194A (and maybe now the Agilent 4294A.  It uses the same 4 terminal pair technique as is used on the HP 4284A LCR Meter (a meter has a digital display) which can also make the measurement.

Have Fun,

Brooke Clarke, N6GCE
-- 
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com

i want to build a network analyzer for reflexion test on high impedance
'device under test', for a frequency range of 100k-1meg hz.

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