Keysight N9913B, User Manual

Page: 143 / 896

Keysight N9938-90006 User’s Guide 143
Calibration for NA, CAT, and VVM Modes
Save the Calibration
After performing any type of calibration, you can save the FieldFox settings
along with the calibration into a STATE (*.sta) file. These settings and
calibration can then be recalled as necessary. To learn how, see
“Saving and
Recalling Files” on page 804
.
CalReady Properties
There are several factory calibrations (CalReady) on every FieldFox. These can
be selected based on the type of DUT that you measure most often, and the
compromise that you prefer to make between measurement speed versus
measurement accuracy. Remember, CalReady was performed at the test ports.
Therefore, a CalReady calibration is most accurate when the DUT is directly
connected to the test ports. Learn more in “CalReady” on page 127 .
This setting does NOT survive Preset or Power ON/OFF.
1. Press Cal 5
>
More
2. Then press CalReady to toggle between the following selections:
— 2-Port Cal (default) Corrects all four S-parameters. Requires a
forward and reverse sweep, which causes slower trace
measurements. Learn why in “Calibration Type” on page 136 .
— Enh. Response Corrects forward (S21 and S11) and reverse (S12
and S22) measurements separately. Therefore, when measurements
in only one direction are required, this choice provides faster trace
measurements than a full 2-port cal. Also choose an Enhanced
Response Optimization. Learn more in “Enhanced Response
Optimization” on page 141 .
To find the best choice for your DUT:
1. Press Preset
>
Preset .
2. Select the appropriate S-Parameter and other settings (frequency range,
resolution, and so forth).
3. Press Trace 6
>
Math and Memory
>
Data->Mem .
4. Press Data & Memory .
5. Press Cal 5
>
More
6. Select a CalReady Cal to compare with the current setting.
7. Press Esc to exit the cal menu.
8. View the differences in the two traces.