Circles in Smith Charts

This group controls the display of circles in the chart display of the Smith Tool window.

The display of constant circles is controlled by the following parameters. All quantities except circles of constant noise-figure are available at the source and load planes.

Parameter	Symbol	Reference Plane
Power Gain	Gp	Source and load planes
Available Gain	Ga	Source and load planes
Stability Factor	K	Source and load planes
	Noise	Source plane
Reflection Coefficient	Refl	Source and load planes

To display a circle:

Select a circle type.
Type a value in the Start group box.
Click Apply.

To display a family of circles:

Select a circle type.
Select Step.
In the Start group box, type the normalized value of the lowest-value grid you want to display.
In the Stop group box, type the normalized value of the highest-value grid you want to display.
In the Incr group box, type the step increment.
Click in the appropriate parameter Value field.