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The X-Philes (2nd Revision)
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The X-Philes Number 1 (1995).iso
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hp48hor2
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nyquist7.doc
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1995-03-31
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(Comp.sys.hp48)
Item: 246
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Resp: 2 of 2 by catto@author.ecn.purdue.edu
Author: [Erin S Catto]
Date: Sat Dec 07 1991
Nyquists Plots:
Rather than using the canned (so-so) Nyquist programs I have found a better
way to do Nyquists on the HP48sx. I use the PARAMETRIC plotting feature:
1) Enter the open loop transfer function in terms of `s`.
2) Store `i*w` into `s`.
3) Make sure `w` is not resolvable.
4) EVAL the transfer function.
5) STO transfer function in `EQ`.
6) Enter plotter.
7) Select PARAMETRIC.
8) Enter { w low high } INDEP.
9) Press AUTO.
10) Decrease RES (decimals allowed) to increase resolution.
11) Change x,y range to change view.
12) Enter { w new_low new_high } to draw more or less.
It saves me time & effort -
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