User Manual

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21.3 Reference
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2
1.3.9 Details on Operators
b
i
=1/
k
Σ
t=i-k/2
dt (i = 1, 2, .... n
)
i+k/2
This section describes the operators used in waveform operation. The
parameter "b
i
" shows the operational result, and "d
i
" shows the source
channel, respectively, in which "i" indicates the serial number of data.
(1) The four arithmetical operations (＋, ー, ＊, ／)
According to the operators set, the four arithmetical operations are performed.
(2) Absolute value (ABS)
【 Equation 】
b
i
=｜d
i
｜(i = 1, 2, .... n)
(3) Exponential (EXP)
【 Equation 】
b
i
= exp(d
i
) (i = 1, 2, .... n)
(4) Common logarithm (LOG)
【 Equation 】
When d
i
＞0, b
i
= log
10
d
i
When d
i
=0, b
i
=-
∞
(overflow value is output)
When d
i
＜0, b
i
= log
10
｜d
i
｜(i = 1, 2, .... n)
【Reference】Use the following equation to convert to natural logarithm:
LnX = logeX = log10X / log10e
1 / log10e ≒ 2.33E + 0
(5) Square root (SQR)
【 Equation 】
When d
i
≧ 0, b
i
= √ d
i
When d
i
＜ 0, b
i
=-√ｌd
i
ｌ(i = 1, 2, .... n)
(6) Moving average (MOV)
【 Equation 】
dt： t-th data of source channel
k ：number of points for averaging (1 to 4000)
【Reference】1 DIV = 100 points
(7) Parallel displacement on time axis (SLI)
Shifts the value on the time axis by a certain number of points.
【 Equation 】
b
i
= d
i-k
(i = 1, 2, .... n)
k ：number of points for averaging (-4000 to 4000)
【Reference】After shifting the waveform, the part right or left without source
channel data becomes 0 V. 1 DIV = 100 points