Verifying Calibration And Jumper Cable Integrity; Calready Properties; Verify Calibration - Agilent Technologies FieldFox N9923A User Manual

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 52.
This setting does NOT survive Preset or Power ON/OFF.
Press Cal 5 then
Then choose from:


To find the best choice for your DUT:
 Press Preset then Preset.
 Select the appropriate S-Parameter and other settings (frequency range,
 Press Trace 6 then
 Press
 Press Cal 5 then
 Select a CalReady Cal to compare with the current setting.
 Press Esc to exit the cal menu.
 View the differences in the two traces.

Verifying Calibration and Jumper Cable Integrity

After calibrating, it is important to verify that the calibration is good. When using
a jumper cable, also verify that the cable is of high quality.
60
More
CalRdy 2-Port Enh Respon
Full 2-Port Cal – Corrects all four S-parameters. Requires a forward and
reverse sweep, which causes slower trace measurements. Learn why on page
57.
Enhanced Response
(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.
Then choose from the following:
o
o (default) An amplifier is a Non-Reciprocal device
Non-Reciprocal
because it has gain in the forward direction, and very high loss (isolation)
in the reverse direction. This choice provides the best correction for non-
reciprocal devices, and reasonable correction for reciprocal devices.
o A reciprocal DUT is a device in which the insertion loss
Reciprocal
through the device is similar in both the forward (S21) and reverse (S12)
directions. A cable is a reciprocal device. This choice provides the best
correction for reciprocal devices. However, S11 measurements on non-
reciprocal devices will appear to have more return loss than the non-
reciprocal choice.
resolution, and so forth).
Math and Memory
Data & Memory.
More
(default) – Corrects forward (S21 and S11) and reverse
then Data->Mem.
N9923A FieldFox User's Guide