Questionable Accuracy; Compatible Mode Calibrations; Save A Calibration; Calready Properties - Agilent Technologies N9913A User Manual

Cal ON ? – Questionable Accuracy
When the Output Power, Interference Rejection, or IF BW (NA Mode ONLY)
setting is changed AFTER performing a calibration, a question mark is added to
the Cal annotation. For example:
current QuickCal is being interpolated. An
The resulting measurement accuracy depends on how much the setting has
changed. For highest accuracy, recalibrate using the new settings.

Compatible Mode Calibrations

The FieldFox can have only ONE calibration present for all modes. Calibrating in
one mode will overwrite calibrations for other modes.
Because NA, CAT, and VVM modes are very similar, a calibration that is
performed in one mode can also be applied in the other modes with the same
type of measurements (1-port or 2-port).
To apply a Cal that was performed in a different mode, press Cal 5 then select
Cal ON.
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 190.

CalReady Properties

There are several factory CalReady calibrations 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 connected to
the test ports. Learn more about CalReady on page 65.
This setting does NOT survive Preset or Power ON/OFF.
 Press Cal 5 then
 Then
 Then choose from:
To find the best choice for your DUT:
 Press Preset then Preset.
78
More
CalRdy
(default) Corrects all four S-parameters. Requires a forward and
2-Port Cal
o
reverse sweep, which causes slower trace measurements. Learn why on page
73.
Enh Response Corrects forward (S21 and S11) and reverse (S12 and S22)
o
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 on page 75.
Q?. is shown on the screen when the
Cal ON
is never added to CalRdy.
?
FieldFox User's Guide