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Making Mixer Measurements
Amplitude and Phase Tracking
Amplitude and Phase Tracking
The match between mixers is defined as the absolute difference in amplitude or phase response over a
specified frequency range. The tracking between mixers is essentially how well the devices are matched
over a specified interval. This interval may be a frequency interval or a temperature interval, or a combination
of both.
You can make tracking measurements by ratioing the responses of two mixer conversion loss
measurements. Then any difference you view in response is due to the mixers and not the measurement
system.
Using the same measurement setup as in "Phase or Group Delay Measurements" on page 2-34, you can
determine how well two mixers track each other in terms of amplitude and phase.
1. Repeat steps 1 through 8 of the previous section "Phase Linearity and Group Delay" on page 2-34, with
the following exception:
In step 7, select .
2. Once the analyzer has displayed the measurement results, press .
3. Replace the calibration mixer with the mixer under test.
4. Press .
The resulting trace should represent the amplitude and phase tracking of the two mixers.
Figure 2-26 Connections for an Amplitude and Phase Tracking Measurement Between Two Mixers
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