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.
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