Anritsu 0701012 - Manual (Page 26)

Menu Bar Using the Power Sensor
3-8 MA24106A UG
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.
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.
Note: Positive values in dB are used for attenuation.
Figure 3-14. Offset Entry Screen