Mathcad question: Please graph (Y1 + Y2 = 1/Zo) over range of Y1 and Y2 .( NOT OT).

Feb 20, 2007 3 Replies
T

Hi,



I don't know why I am having so much trouble trying to graph this simple function in Mathcad. It is not Off Topic because, ultimately, I am trying to graph the solutions to the Thevenin Termination problem (split termination, if you prefer).



Specifically, if I have two admittances, Y1 and Y2, in parallel, they add. A termination admittance would result from Y1 + Y2 = 1/Zo. It is easy to plug in a few numbers and get some values for Y1 and Y2 that satisfy, say Zo=50 Ohms. I am trying to get a graph of the function in Mathcad, as in Y1 vs Y2 for some value of Zo, and for some reason, it is just not coming to me.



I know that there are lots of Mathcad gurus out there that will find this really easy.



Thank You Tom tom_cip snipped-for-privacy@hotmail.com


Vote
Twitter Facebook LinkedIn
J

Graphing generally requires a range variable that produces a lits of values (as in x:1;10). You can either make the values to be graphed functions of x or graph a function of x against the xalues of x, itself.

Vote
Twitter Facebook LinkedIn
R

Using your example, define Zo:=50 and then define the function Y2(x):=(1/Zo)-x. Drop a graph on the page with @ and just fill in the marker for the left axis with "Y2(x)". Mathcad will give you a default range for the x-axis but you can change that, as usual, with the axis limit boxes.

You may, but are not required to, pre-define a range for the independent variable as in x:=0..10 or x:=0,0.1..10 and so forth. The "y-axis only" trick works with all functions, built-in and user-defined.

Rich Webb Norfolk, VA
Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required