Power Calibration
The Analyzer ensures steady power level at the test port inputs with the specified accuracy. The power level is defined by the user between the instrument’s minimum and maximum output power level.
A DUT is connected to the Analyzer by cables, which have some losses. The power calibration allows the user to maintain a more accurate power level at a DUT input, adjusted to the use of the cables.
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 the user can disable or enable again the power correction function.
The power calibration is performed for each port and each channel individually.
| Item | Description |
|---|---|
| Note | The power correction status is indicated in the trace status field (See section 4.2.2) and in the channel status bar (See section 4.2.6). |
Loss Compensation Table
The loss compensation function allows the user 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 you need to compensate in the table (See Figure 61) specifying frequency and losses.
Figure 61 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. |Item|Description| | --- | --- | | Note | To have the losses compensated for, you need to enable this function and fill out the table before you start the power calibration procedure. |
Power Calibration Procedure
Perform connection and setting of an external power meter as described in section 8.8. 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.
To select the calibrated port number, and zero the power meter, use the corresponding softkeys.
| Item | Description |
|---|---|
| Note | Power meter sensor can be connected to the port, as during zero setting the output signal of the port is turned off. |
| Note | After the power calibration is complete, power correction automatically turns on. |
Power Correction Setting
To enable/disable power correction, use the corresponding softkey.
Loss Compensation Table Editing
If you need to apply the loss compensation, enable this function and fill out the table before you start the power calibration procedure. Fill out the table for each port individually.
To add a new row to the loss compensation table, to delete a highlighted row, or to clear the table use the corresponding softkeys.
To save the table into a .lct file on the hard, or to open the table from a .lct file from the hard, use the corresponding softkeys.
Enter frequency and loss values into the table, scrolling by navigation keys. To enable the loss compensation function, to select the source port number, or to execute receiver calibration, use the corresponding softkeys.
| Item | Description |
|---|---|
| Note | After the receiver calibration is complete, receiver correction automatically turns on. |