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Chapter 4 231
Calibration
Vector-Mixer Calibration
4. Cal
ibra
tion
Set the stimulus conditions for the channel you want to calibrate. For the necessary steps,
refer to “Setting Stimulus Conditions” on page 70.
You must also set the external signal source in advance. For the necessary steps, refer to “2.
Setting External Signal Source” on page 316.
NOTE
If you characterize a calibration mixer with an IF filter, we recommend that you perform
full 4-port calibration in advance, since it simplifies the evaluation procedures. For detailed
information on full 4-port calibration, see “Full 4-Port Calibration” on page 124.
Step 1. Press .
Step 2. Press
Load & Project
.
Step 3. Specify “D:\Agilent\MixerCharacterization.vba” for the file name in the Open dialog box
and then press the
Open
button.
Step 4. Press to run the macro (see Figure 4-72).
Step 5. Select
Port 1
(1 in Figure 4-72) to characterize the calibration mixer 1 with IF filter. In this
case, the data are saved to a temporary file (MIXER_1.s2p).
NOTE For detailed information on characterizing the calibration mixer, see “Characterizing
procedure for calibration mixer (with IF filter)” on page 225.
Step 6. Select
Port 2 (1 in
Figure 4-72) to characterize calibration mixer 2 with IF filter. Here, the
data are also saved to a temporary file (MIXER_2.s2p).
NOTE For detailed information on characterizing the calibration mixer, see “Characterizing
procedure for calibration mixer (with IF filter)” on page 225.
Step 7. Press
(Optional) Balanced Mixer
(2 in Figure 4-72).
Figure 4-72 Vector Mixer Characterization Macro
Step 8. As the Vector Mixer Characterization Macro is running, the data files of the pre-measured
calibration mixer with IF filter (MIXER_1.s2p, MIXER_2.s2p) are read automatically into