GW Instek APS-1102 Control Software User Manual - Manual (Page 72)

APS-1102 Control Software User Manual
8-8
e) Built-in functions
The functions shown in “Table 8-4 Built-in Function” can be used in the numerical expression
input section [Y=] in the “ARB”.
The argument for the trigonometric function is a radian expression.
Power() and phase() are functions that specify the real part in expression 1 and the imaginary part in
expression 2 and return the size or declination of a complex vector.
tri() is a function that specifies the angle in expression 1 and the inclination in expression 2 to define
the triangle wave. Expression 2 can be omitted. When omitted, an inclination of 50% is used.
sqw() is a function that specifies the angle in expression 1, the duty ratio in expression 2, and the
transition in expression 3 to define the square wave. Expression 2 and expression 3 can be omitted.
When omitted, a duty ratio of 50% and a transition of 0% are used. However, expression 2 must be
specified when expression 3 is specified.
rnd() is a function that defines noise without using an expression.
Table 8-4 Built-in Functions
sin(expression) cos(expression) tan(expression) atn(expression)
sqr(expression) exp(expression) log(expression)
power(expression_1,expression_2) phase(expression_1,expression_2)
tri(expression_1,expression_2) sqw(expression_1,expression_2,expression_3) rnd()
f) Inter-waveform numerical expression examples
Some sample inter-waveform numerical expressions are shown below.
In an example where there is only one page, the range is the whole horizontal axis range and
description is omitted.
 One cycle of sine wave (horizontal axis unit: addresses 0 to 4096, vertical axis unit: data ±32767)
Page 1 [Constant] [fs=32767;] [Y=] [fs*sin(x*s)]
[s=2*pi/4096;]  4,096 addresses are regarded as 2.
 One cycle of sine wave (horizontal axis unit: time 0 to 1 ms, vertical axis unit: voltage ±10V)
Page 1 [Constant] [fs=10;] [Y=] [fs*sin(x*s)]
[s=2*pi/1e-3;]  1 ms is regarded as 2.
 One cycle of sine wave (horizontal axis: user unit 0 to 1, vertical axis: user unit 1 to +1)
Page 1 [Constant] [s=2*pi;] [Y=] [sin(x*s)]
 One cycle of sine wave (horizontal axis: user unit 0 to 6.283185, vertical axis: user unit 1 to +1)
Page 1 [Constant] [None] [Y=] [sin(x)]
 One cycle of square wave (horizontal axis: user unit 0 to 6.283185, vertical axis: user unit 1 to
+1)