Agilent Technologies 4294A Programming Manual page 101

When you execute the "CALECPARA" command, the analysis results will be
automatically displayed. You can use the following command to select whether to display
these results on the screen.
• "DISECPARA" on page 299
Use the following command for query to read equivalent circuit analysis results (equivalent
circuit parameters: R1, C1, L1, C0).
• "DEFEC{R1|C1|L1|C0}" on page 296
You can use parameter values (R1, C1, L1, C0) obtained through equivalent circuit
analysis to perform frequency characteristic simulation for such values and display the
simulation results as memory trace. To do this, use the following command.
• "SIMFCHAR" on page 437
You can use the "DEFEC{R1|C1|L1|C0}" command (page 296) to specify the desired
value of each of the parameters R1, C1, L1, and C0. Therefore, you can display frequency
characteristics simulated based on desired parameter values.
Example 7-2 shows a sample equivalent circuit analysis program. This program is
available under the filename "circuit.bas" on the sample program disk.
This program performs a sweep once, selects equivalent circuit model E, performs
equivalent circuit analysis, and reads and displays the analysis results. This program also
performs frequency characteristic simulation based on parameter values obtained through
the analysis.
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Example 7-2 Equivalent Circuit Analysis
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Chapter 7
Identifies the external controller and Instrument BASIC and sets the
GPIB address.
Substitutes the sweep center value, the sweep span value, and the
selected equivalent circuit model into the corresponding variables
Cent, Span, and model$, respectively.
Resets the Agilent 4294A, sets impedance amplitude and phase as
measurement parameters, and sets the sweep center value and the
sweep span value to Cent and Span, respectively.
Performs a sweep once, performs auto scaling, and executes the auto
scale to automatically set the scale parameters so that the waveforms
fit on the screen.
Sets the selected equivalent circuit model to "Model$" and performs
equivalent circuit analysis.
Reads and displays equivalent circuit parameters R1, C1, L1, and C0.
Performs frequency characteristic simulation.
DIM Model$[9],Buff$[9]
REAL Cent,Span,R1,C1,L1,C0
IF SYSTEM$("SYSTEM ID")="HP4294A" THEN
ASSIGN @Hp4294a TO 800
ELSE
ASSIGN @Hp4294a TO 717
END IF
!
Processing Measurement Results
Analyzing Measurement Results
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