Hioki MR8740-50, Инструкция по эксплуатации

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169
Operators of Waveform Calculation and Calculation Results
8.3 Operators of Waveform Calculation and
Calculation Results
b
i
:
i
th data point of calculation results,
d
i
:
i
th data point acquired across the source channel
Waveform calculation
type
Description
Four arithmetic
operations (+, −, ×, ÷)
Makes calculations using operators specified from the four arithmetic operations, which
consists of addition (+), subtraction (−), multiplication ( × ), and division ( ÷ ). Multiplication
signs (×) and division signs (÷) are represented as asterisks (*) and slashed (/),
respectively.
Absolute value (ABS) b
i
= | d
i
| ( i = 1, 2, . . . , n)
Exponent (EXP) b
i
= exp ( d
i
) ( i = 1, 2, . . . , n)
Common logarithm
(LOG)
With
d
i
> 0 b
i
= log
10
d
i
With d
i
= 0 b
i
= −∞ (Outputs overflowing values)
With
d
i
< 0 b
i
= log
10
| d
i
| ( i = 1, 2, . . . , n)
Note: The following expressions can convert common logarithms into natural
logarithms.
In X = log
e
X = log
10
X / log
10
e
1 / log
10
e ≈ 2.30
Square root
For d
i
≥ 0 b
i
= √ d
-
i
With
d
i
< 0 b
i
= −√
|
d
-
i
| (
i = 1, 2, . . . , n)
Cube root (CBR)
= √
3
Moving average (MOV)
For this function, specify the number of moving points at the second parameter
k
.
When k is an odd number When k is an even number
1
𝑘𝑘
𝑖𝑖𝑖
𝑘𝑘 − 1
2
𝑡𝑡𝑡𝑖𝑖𝑡𝑘𝑘
− 1
2
𝑏𝑏
𝑖𝑖
=
∑
d
t
(𝑖𝑖 = 1, 2, . . . , n)
1
𝑘𝑘
𝑖𝑖𝑖
𝑘𝑘
2
𝑡𝑡𝑡𝑖𝑖𝑡𝑘𝑘2𝑖1
∑
d
t
(𝑖𝑖 = 1, 2, . . . , n)
𝑏𝑏
𝑖𝑖
=
d
t
: t th data point acquired across the source channel
k
: Number of moving point (1 to 5000)
Specify the constant
k
following a comma. Example: To calculate 100-point moving
averages of the Z1 data. MOV(Z1,100)
For each
k
/2 points of data at the beginning and end of the calculation interval, the
instrument makes calculations by plugging in zero for data-missing parts
Parallel move in the
time axis direction
(SLI)
For this function, specify the number of moving points at the second parameter k.
The instrument yields waveforms parallel moving in the time axis direction by the
specified number of points.
b
i
= d
i−k
( i = 1, 2, . . . , n)
k
: Number of moving point (−5000 to 5000)
Specify the constant
k
following a comma. Example: To move data Z1 by 100 points
SLI(Z1,100)
Note When waveforms are parallelly moved, the non-data parts at the beginning or
end of the calculation interval measure a voltage of 0 V.
Sine (SIN)
b
i
= sin( d
i
) ( i = 1, 2, . . . , n)
For the trigonometric and inverse trigonometric functions, specify numbers in radians
(rad).
Cosine (COS)
b
i
= cos( d
i
) ( i = 1, 2, . . . , n)
For the trigonometric and inverse trigonometric functions, specify numbers in radians
(rad).
Tangent (TAN)
b
i
= tan( d
i
) ( i = 1, 2, . . . , n)
For the trigonometric and inverse trigonometric functions, specify numbers in radians
(rad).
8
W
aveform Calculation Function