HP 85106D mm-Wave System
Contents-iii
Warm-up Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Before Starting a Measurement Calibration . . . . . . . . . . . . . . . . . . . 2-17
Setting the Stimulus Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Selecting the Averaging Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Checking the Instrument State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Entering the Exact Offset Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
TRL 2-Port Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Performing the Optional Isolation Calibration . . . . . . . . . . . . . . . . . 2-20
Response and Isolation Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
1-Port Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Choosing the Proper Load Standard . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Figure 2-4. Phasor Diagram, Measuring Directivity Using Various
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
1-Port Reflection Calibration Procedure . . . . . . . . . . . . . . . . . . . . . 2-24
Combining Calibration Error Models . . . . . . . . . . . . . . . . . . . . . . . 2-25
Example Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Transmission Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Figure 2-5. S
21
, Bandpass Filter, 33 to 50 GHz, Showing
Typical Dynamic Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Reflection Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Figure 2-6. Comparing S
Measurements Using Response and
1-Port Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
21
Response, Using Frequency List to Adjust Frequency
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Waveguide Electrical Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Figure 2-8.
Phase and Group Delay . . . . . . 2-29
Using Waveguide Delay to View the Phase Response 2-29
Time Domain Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Figure 2-10. S
Shorted 10 cm Waveguide Section . . . . . . . . . . . . 2-31
Operation Using A Coaxial Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Figure 2-11. Block Diagram of System With Coaxial Test Set . . . . . 2-32
Common Problems and Their Solutions . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Instrument State and Hardware State Settings . . . . . . . . . . . . . . . . . . . . 2-36
Sweep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Set Zo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Table 2-4. Waveguide Cutoff Frequencies . . . . . . . . . . . . . . . . . . . . 2-38
Содержание 85106D
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