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 Network Analyzers using PXI software

The Analyzer ensures steady power level at the test port with the specified accuracy. The power level is defined between the instrument’s minimum and maximum output power level.

A DUT is connected to the Analyzer by cables (see figure below), which have some losses. The power calibration allows to maintain a more accurate power level at a DUT input, adjusted to the use of the cables.

Power Calibration

Power Calibration

The power calibration is performed by an external power meter connected to the cables’ ends, which will be later connected to the DUT. After the power calibration is complete, power correction automatically turns on. Later it is possible to disable or enable again the power correction function.

Power Calibration 2

Power Calibration with external power meter


note

If an adapter or other accessory is used when connecting the power meter to the measurement port, the losses introduced by the adapter or accessory are compensated by the Loss Compensation function.


The power calibration is performed for each port and each channel individually.


note

The power correction status is indicated in the trace status field (See Trace Status Field) and in the channel status bar (See Channel Status Bar).


Loss Compensation Table

The loss compensation function allows to apply compensation for unwanted losses produced between the power meter and the calibrated port in the process of power calibration. Define the losses, which are needed to compensate in the table specifying frequency and losses (See figure below).

Loss compensation table

Loss compensation table

Linear interpolation will be applied to the losses in the intermediary frequency points.  The loss compensation table is defined for each port individually.


note

To have the losses compensated for, enable this function and fill out the table before starting the power calibration procedure.


Loss Compensation Table Editing

If the loss compensation needs to be applied, enable this function and fill out the table before starting the power calibration procedure. Fill out the table for each port individually.

Loss Compen Port 1

Add softkey

To add a new row to the loss compensation table, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Add

A new row will appear under the highlighted one.

Delete softkey

To delete a highlighted row, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Delete

Clear Loss Table softkey

To clear all the table, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Clear Loss Table

 

Export Loss Table softkey

To save the table into a *.LCT file on the hard, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Export Loss Table

 

Import Loss Table softkey

To open the table from a *.LCT file from the hard, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Import Loss Table

 

Enter frequency and loss values into the table, scrolling by navigation keys.

 

Compensation OFF

To enable the loss compensation function, use the following softkeys:

Calibration > Power Calibration > Loss Compen > Compensation

 

 

 

Power Calibration Procedure

Perform connection and setting of an external power meter as described in Power Meter Setting. Connect the sensor to one of the test ports of the Analyzer and perform calibration as described below. Then repeat the calibration for the other test port.

Power Calibration R&S NRP-Z

Select Port 1 softkey

To select the calibrated port number, use the following softkeys:

Calibration > Power Calibration > Select Port

Power Sensor Zero Correction

To zero power meter, use the following softkeys:

Calibration > Power Calibration > Power Sensor Zero Correction

 

 

 


note

The power meter sensor can be connected to the port, as during zero setting the output signal of the port is turned off.


Take Cal Sweep

To execute power calibration, use the following softkeys:

Calibration > Power Calibration > Take Cal Sweep

 

 

 


note

After the power calibration is complete, power correction automatically turns on.


Power Correction Setting

Power Calibration R&S NRP-Z

Correction OFF

To enable/disable power correction, use the following softkeys:

Calibration > Power Calibration > Correction

 

 

 

 

Rev.:  22.3