Agilent Technologies 8753ET User Manual page 325

Calibrating for Increased Measurement Accuracy
Calibrating for Noninsertable Devices
wish to delete the register, or re-save the new calibration in this register as shown in
the following step.
16.To save the results of the new cal set, press
INTERNAL MEMORY
NOTE Adapter removal can leave a residual state in internal memory. This is not a
valid instrument state and should be deleted.
Figure 6-16 Calibrated Measurement
Verify the Results
Since the effect of the adapter has been removed, it is easy to verify the accuracy of the
technique by simply measuring the adapter itself. Because the adapter was used during
the creation of the two cal sets, and the technique removes its effects, measurement of the
adapter itself should show the S-parameters.
If unexpected phase variations are observed, this indicates that the electrical delay of the
adapter was not specified within a quarter wavelength over the frequency range of
interest. To correct this, recall both cal sets, since the data was previously stored to disk,
change the adapter delay, and press
Your analyzer's programmer's guide contains an example program that demonstrates the
adapter removal process over GPIB.
6-44
Save/Recall
RETURN SAVE STATE
REMOVE ADAPTER
SELECT DISK
.
.