On Mon, 4 Oct 2004 19:30:19 -0500, "John Smith"
wrote:
400 5.1 + 1.3i
Reference Measurement
Freq A1 B1 ?1 A2 B2 ?2
400 1 0.79 180 1.08 0.695 177
Hi John,
Well, from the two results above, and referencing my copy of Appl.
Note 77-3, Page 7, section "Measuring Rho 100 to 1000 MHz," there are
a number of issues here.
Your B1/A1 is quite off the mark (but certainly correctable, afterall,
that is the purpose of its measurement).
|Rho| = B2·A1/A2·B1 = 0.695·1/1.08·0.79 = 0.815
Casting the magnitude and angle onto a Smith Chart would suggest your
5.1 + 1.3i Ohms is close enough given your data.
The only kicker is port tracking, but I have a hunch that probably is
not an issue.
This bears further consideration. Too bad Kraus did not choose to
elaborate.
73's
Richard Clark, KB7QHC
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