Keysight x-series User Reference Manual page 210

4 Input/Output Functions
Input/Output
The guided calibration (front panel only) will show connection diagrams and guide you through the isolation
calibration and calibrating each port. The calibration data for each port is stored separately, so as soon as
a port is calibrated that data is saved and will be used. If you press "Exit" to exit the calibration process, the
data for the ports already completed will still be used. It is recommended that a calibration be completed
once started, or if exited, that it be properly done before the next use of the I/Q ports. The "Next" button will
perform the calibration for the current port and then proceed to the next step in the calibration procedure.
The "Back" button will return to the prior port in the procedure. Both keys and dialog buttons are supplied
for ease of use. The dialog buttons are for mouse use and the softkeys for front panel use.
The calibration can also be done via SCPI, but no connection diagrams will be shown. You will have to
make the correct connections before issuing each port calibration command. Again, it is recommended that
all ports be calibrated at the same time.
The instrument state remains as it was prior to entering the calibration procedure except while a port is
actually being calibrated. Once a port is calibrated it returns to the prior state. A port calibration is in
process only from the time the "Next" button is pressed until the next screen is shown. For SCPI, this
corresponds to the time from issuing the CAL:IQ:FLAT:I|IB|Q|QB command until the operation is complete.
For example, if the prior instrument state is Cal Out = Off, Input = I+jQ, and Differential = Off, then up until
the time the "Next" button is pressed the I Input and Q Input LEDs are on and the Cal Out, I-bar Input and
Q-bar Input LEDs are off. Once the "Next" button is pressed for the I port calibration, only the Cal Out and I
Input LEDs will be on and the others will be off. When the screen progresses to the next step ("Next" button
again enabled), the prior state is restored and only the I Input and Q Input LEDs are on (Cal Out is off again).
The last calibration date and time for each port will be displayed. Any calibrations that are more than a day
older than the most recent calibration will be displayed with the color amber.
Key Path
Initial S/W Revision
I Port
The I port calibration is performed with the front panel's I port connected via a short BNC cable to the Cal
Out port. The guided calibration will show a diagram of the required connections.
Back
Return to the prior step in the calibration procedure.
Key Path
Initial S/W Revision
Next
Perform the I port calibration.
Key Path
Remote Command
210
Input/Output, I/Q
Prior to A.02.00
Input/Output, I/Q, Q Setup, Q Probe, Calibrate
Prior to A.02.00
Input/Output, I/Q, I/Q Cable Calibrate...
:CALibration:IQ:FLATness:I
EMI Receiver Mode Reference