Keysight N9912-90001 User’s Guide 14- 11
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 device. The FieldFox signal source is
transmitted out the RF OUT connector, through the DUT, and into the RF IN
connector. Both ends of the DUT must be connected to the FieldFox.
Figure 14-3 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. Connect the RF Out and RF In test port cables to form a Thru connection. If
an adapter is needed to make the connection, the measurement results
will be in error by the amount of loss in that adapter
4. Press Meas Setup 4
then Zero.
5. Connect the DUT as in the diagram above.
6. The displayed magnitude value is the gain of the amplifier. To measure
isolation of the amplifier, reverse the connection to the amplifier (RF Out
to the amplifier output).
Only Magnitude, NOT Phase, is displayed.
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