Agilent Technologies 8719D User Manual page 86

Substitute a thru for the device and perform a response calibration and press:
3.
Reconnect your test device.
4.
5.
Notice that in Figure 2-34 the SAW iilter under test has considerable phase shift within only
a 2 MHz span. Other filters may require a wider frequency span to see the effects of phase
shift.
The linearly changing phase is due to the device's electrical length. You can measure this
changing phase by adding electrical length (electrical delay) to compensate for it.
6. To place a marker at the center of the band, press:
7. To activate the electrical delay function, press:
This function calculates and adds in the appropriate electrical delay by taking a flO% span
about the marker, measuring the Ac$, and computing the delay as A+/Afrequency.
238 Makina Measurements