3152B User Manual
Publication No. 980935 Rev. A
pi (
π
)
Circumference of unit-diameter circle
per
Horizontal wavelength in points
f
I/per
omg (
ω
) 2*
π
*f
amp
Amplitude in units of points or Hertz
sin(x)
The
sine
of
x*
cos(x)
The
cosine
of
x*
tan(x)
The tangent of x*
ctn(x)
The cotangent of x*
log(x)
The base IO logarithm of x*
In(x)
The natural (base e) logarithm of x*
abs(x)
The absolute value of x*
-1E^20<>1E^20
Numerals, equation constants
*substitute your mathematical expression for x
After you get familiar with the operands and conventions, you can
try a few simple equations and see how they create waveforms.
Typing Equations
Recall that a straight line is defined by Y as a function of X as in the
equation Y = mX + b. You can use this to generate a straight line
using Equation Editor. Assuming first that p = 0, try this:
Amplitude(p)=1000
Press [Preview] and see what you get. Of course, you get an
uninteresting line that runs parallel to the X-axis. Now, lets give the
line some angle by typing:
Amplitude(p)=-2*p+2000
Press [Preview] and see that the line slopes down. It may still be
not very interesting however, pay close attention to the convention
that is used in this equation. You cannot type: Amplitude(p)=-
2p+1000, like you would normally do in your notebook; You must
use the * (multiply) sign, otherwise you'll get a syntax error. Now
we'll try to generate a simple sine waveform. Try this:
Amplitude(p)=sin(10)
Press [Preview] and… sorry, you still get nothing on the screen.
The Wave Composer did not make a mistake! The sine of 10 in
radians is exactly what it shows. You are unable to see the result
because the line on your screen running across the 0 vertical point.
REMEMBER
The equation must be a function of a single variable and
that variable must be directly related to the Horizontal
axis Scale setting.
Now try this:
Amplitude(p)=sin(omg*p)
Still no good, but now press the [Adjust] button and here is your
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