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64
mu1(complex a,complex b,
complex c,complex d)
Return value mu1 = (1-|a|^2)/(|d-conj(a)*(a*d-b*c)|+|b*c|). The parameter a, b, c and d are plurals.
mu2(complex a,complex b,
complex c,complex d)
Return value mu2 = (1-|d|^2)/(|a-conj(d)*(a*d-b*c)|+|b*c|). The parameter a, b, c and d are plurals.
phase(complex a)
Return to atan2 (a), i.e. calculation phase, in radian. The parameter is a plural.
PI
Constant Pi, 3.141592.
re(complex a)
Return to the real part of the plural a. The plural a is a plural.
sin(complex a)
Return to the sine value of the plural a. The parameter a is a plural, in radian.
sqrt(complex a)
Return to the square root of the modulus of the plural a. The parameter a is a plural.
tan(complex a)
Return to the tangent value of the plural a. The parameter a is a plural, in radian.
8) Operator selection
Operations are shown in Table 3.11. The user can click the mouse to select the required operator, such as four basic operators, i.e."+",
"-", "*" and "/", as well as the left bracket and right bracket. In addition, the Equation Editor also supports direct input of plural data for
operation. To enter the plural constant 2+j3, the user should enter <2:3> into the Equation Editor to indicate the plural constant 2+j3.
To enter the (2+j3)*S11, the user should enter the expression <2:3>*S11 for operation.
Table 3.11 List of Operators
+
Addition operator
-
Subtraction operator
*
Multiplication operator
/
Division operator
(
Left bracket
)
Right bracket
,
Comma, used to separate several parameters.
<
Start symbol to enter the plural.
:
Used to separate the real part and imaginary part of the plural.
>
Ending symbol to enter the plural.
9) Trace data
The user can select the trace or trace data in the list below, but the current active trace cannot be selected.
10) Channel parameter data
The user can only select the S-parameter of the current active channel as the parameter data of the entered expression.
11) Number key zone
The user can enter numbers by clicking number keys in the number key zone, the positive and negative symbol by clicking [+/-] and
the decimal point by clicking [•].
3.5.6.3.
Data and Precautions of Use of Equation Editor
The data of each point of the formula trace can be calculated according to the data of the corresponding point on the reference trace.
If the trace includes 201 points, the calculation will be done 201 times by the formula, i.e. Once for each data point. If the current trace
is Tr4 and the formula is Tr2+S11, Tr4 will be the formula trace. Tr1 and S11 are the reference tracks of the formula trace. In addition,
the current active trace Tr4 in the display window of the vector network analyzer will be displayed as Tr4Eq=Tr2+S11. As shown in Fig.
3.57.
