Tabor Electronics 5251, User Manual

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TE5251
User Manual
3-46
Equation
Convention
The following paragraphs describe the conventions that are used
for writing an equation. To avoid errors, it is extremely important
that you make yourself familiar with these conventions before you
plan your waveforms.
Equations are written in conventional mathematical notation. You
may only enter the right part of the equation. The only limitation is
that the equation must be of a single variable that is directly related
to the current horizontal axis setting. Case is not important and
spaces are ignored. Numbers are entered in scientific notation. All
calculations are done with double-digit precision. For the
trigonometric functions, all angles are expressed in radians.
A number of constants are provided: e, which is the base of the
natural logarithm; pi, which is the circumference of a unit-diameter
circle; per, which equals the programmed horizontal range; f, which
equals 1 /per; omg, which equals 2 * pi / per, and numerals in the
range of -1E^20 to 1E^20.
There are three classes of precedence: ^ (raise to power) has the
highest precedence; (multiply) and / (divide) come second; + and -
have the lowest precedence. Parentheses may be used to change
the order of precedence. The following table summarize the
mathematical expressions and their respective abbreviated
commands that can be used with the Equation Editor.
Equation Editor Operands
^ Raise to the power
* Multiply
/ Divide
+ Add
Ä Subtract
( ) Parentheses
e Base of natural Logarithm
pi (
π
) Circumference of unit-diameter circle
per Horizontal wavelength in points
f I/per
omg (
Ω
) 2*
π
/ per
amp Amplitude in units of points or seconds
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
(* )x = argument mathematical expression
After you get familiar with the operands and conventions, you can
commence with a few simple equations and see what they do to
your waveform screen. Once you'll get the feel, you'll be able to