Keysight Technologies FieldFox A Series, User Manual

Page: 495 / 756

Keysight N9927-90001 User’s Guide 495
VVM (Vector Voltmeter) Mode - Option 308
2-Port Transmission Measurements
2-Port Transmission Measurements
A 2-Port Transmission measurement is used for measuring electrical length,
insertion loss, gain, or isolation of a DUT at a single CW frequency. The
FieldFox signal source is transmitted out the port 1 connector, through the
DUT, and into the port 2 connector. In the following image, the gain of an
amplifier is being measured.
Figure 23-3 2-Port Transmission measurement of an amplifier
How to make a 2-Port Transmission Measurement
1. Press Mode then VVM then 2-Port Transmission .
2. Press Freq/Dist and enter the measurement frequency.
3. Press Meas Setup 4 then More then Output Power . Select High for passive
devices. Select Low for amplifiers.
4. Calibrate the FieldFox using one of the methods described in “VVM
Calibration” on page 491 . Before performing a QuickCal or Mechanical
Cal, press Meas Setup 4 then Zero OFF .
5. 5.Connect the DUT.
Notes:
— The magnitude value is the gain (positive value) or the loss (negative value)
of the DUT.
— The phase value is the difference in phase (in degrees) between the DUT
input and output.
QuickCal is only available on N991xA/2xA/3xA models.