2-39
Making Mixer Measurements (Option 089 Only)
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
2-35, 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 2-35, 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
Format
PHASE
Display
DATA→MEM
DATA/MEM