Agilent Technologies X Series Manual page 472

Input/Output
Initial S/W Revision
I/Q Cable Calibrate...
The I/Q cable calibration creates correction data for each of the front panel I/Q ports. This calibration
data is used whenever no probe specific calibration data is available. It is important that all ports are
calibrated using the same short BNC cable so that the data is comparable from port to port.
The guided calibration (front panel only) will show connection diagrams and guide the user 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 a user presses "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
softkeys 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. The user 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
472
A.02.00
Input/Output, I/Q
Prior to A.02.00
Input/Output, I/Q, Q Setup, Q Probe, Calibrate