Anritsu 0701012, MA24106A manual Offset Table, Offset Entry Screen

Menu Bar Using the Power Sensor

Offset Table

The Offset Table feature provides the ability to apply corrections to measurements in cases of RF devices being used between the sensor and DUT. Offset Table is different from Fixed Offset as it provides the ability to enter different offset values at different frequencies for an RF device. The frequency response of that device needs to be known before it can be entered. Offset Table employs linear interpolation to determine offset values for intermediate frequencies. In cases where the cal factor frequency is higher than the highest frequency in the offset table, then the offset for the highest frequency in the table is used. Similarly, when the cal factor frequency is lower than the lowest frequency in the offset table, then the offset for the lowest frequency in the offset table is used.

The procedure for setting, saving, recalling, and applying the offset table is as follows:

1.Click OffsetTable and select Setup.

2.In the resulting dialog (Figure 3-14), enter the frequency response of the RF device manually or by importing an S2P file used to measure the DUT. The example below is of a 10 dB attenuator where the values were manually entered.

Note: Positive values in dB are used for attenuation.

Figure 3-14.Offset Entry Screen

3.Click Apply in the Offset Entry screen to correct the measurement.

The word Offset appears in the display window indicating that an offset table correction is applied to the current measurement. Also, a check mark is applied in front of the Offset Table On selection in the OffsetTable menu.

4.To clear all of the entries in the table, click the Clear Table button.

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