Agilent Technologies 8719D User Manual page 241

You should perform the isolation measurement when the highest dynamic range
is desired.
To perform the best isolation measurements, you should reduce the
bandwidth, and/or activate the averaging function.
A poorly measured isolation class can actually degrade the overall
measurement performance. If you are in doubt of
quality, you should omit the isolation portion of this procedure.
14. You may repeat any of the steps above. There is no requirement to go in the order of
steps. When the analyzer detects that you have made all the necessary measurements, the
The COMPUTING CAL COEFFICIENTS will appear, indicating that the analyzer is
message
performing the numerical calculations of error coefficients.
You can save or store the measurement correction to use for later
measurements Refer to the Trinting, Plotting, and Saving Measurement
Results" chapter for procedures.
15. Connect the device under test. The device S-parameters are now being measured.
When making measurements using
power level for each channel must fall within the same power range setting of
that single port. An error message will be displayed if you enter two power
levels that do not fall within the same power range.
isolation measurement
the
same port with uncoupled channels, the
the
Optimizing Measurement Results 6-27
system