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When automating markers on the ENA Family of vector network analyzers while the display format is Smith Chart R ± jX is it possible to programmatically query the indicated inductance or capacitance?

Please refer to marker 1 and marker 2. The ENA Smith Chart R ± jX on-screen marker display information includes the inductance or capacitance values as applicable.

Smith Chart Marker

The inductance / capacitance information cannot be directly queried via the automation interfaces. The inductance (positive reactance, top half of the Smith Chart) or capacitance (negative reactance, lower half of the Smith Chart) are not available as an automation query.

However the inductance or capacitance values can be computed as follows:

Positive Reactance (inductive) – Marker 1:

Xl = jwL

Xl= Inductive Reactance
w == 2*π*frequency
L = inductance

Marker 1 indication, Solving for L = (Xl) / (2*π*f)

L = 34.788 / (2*π*2046)

L = 27.141 nH

Negative Reactance (capacitive) – Marker 2:

Xc = 1 / (jwC)

Xc = Capacitive Reactance

w == 2*π*frequency

C = capacitance

Marker 2 indication, Solving for C = 1 / (2*π*f*Xc)

C = 1 / (2*π*1966*42.386)

C = 19.158 pF

Related ENA Family automation commands:
Marker 1 related:

 

 

-> CALC1:MARK1:ACT ‘Marker 1 to active marker
-> CALC1:MARK1:X? ‘Marker 1 stimulus query
<- +2.04000000000E+008 ‘This is Marker 1 stimulus frequency
-> CALC1:MARK1:Y? ‘Marker 1 response query
<- +4.87255352662E+001,+3.47884842345E+001 ‘Second value is reactance

Marker 2 related:
 

 

-> CALC1:MARK2:ACT
-> CALC1:MARK2:X? ‘Marker 2 stimulus query
<- +1.96000000000E+008 ‘This is Marker 2 stimulus frequency
-> CALC1:MARK2:Y? ‘Marker 2 response query
<- +3.57776296334E+001,-4.23858420455E+001 ‘Second value is reactance

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