228 Chapter 4
Calibration
Vector-Mixer Calibration
measured mixer. In vector-mixer calibration, where the up/down conversion method is
used, the power of the LO signal is distributed to the calibration mixer and the measured
mixer through the power splitter. During a characteristics evaluation of the calibration
mixer, the LO power level used by the drive of the calibration mixer must be equal to the
LO power level with the measured mixer connected. This is because the mixer’s
conversion loss and reflection coefficient are significantly affected by the power level of
the LO signal.
Step 1. Select CalKit (3 in Figure 4-67).
Step 2. Select the type number of the calibration kit from CalKit menu (3 in Figure 4-67).
Step 3. Press the Open button (5 in Figure 4-67) to start measurement in OPEN.
Step 4. Press the Short button (6 in Figure 4-67) to start measurement in SHORT.
Step 5. Press the Load button (7 in Figure 4-67) to start measurement in LOAD.
7. Measuring Calibration Mixer with IF Filter (when using ECal module)
Figure 4-69 Characterizing calibration mixer using ECal
Step 6. Select ECal (1 in Figure 4-69).
Step 7. Select the port used for the ECal module (2 in Figure 4-69).
Step 8. Press the Measure button (3 in Figure 4-69) to start measurement.
8. Saving Characteristic Data and Closing VBA Macro
Step 1. Press the Save button (8 in Figure 4-67) to open the Save screen (Figure 4-70).
Step 2. Press the Save button (1 in Figure 4-70) to specify a name for the characteristic data of the
calibration mixer with IF filter. Then save it to a Touchstone file.
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