Agilent Technologies 4156b, User Manual

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7-14 Agilent 4155B/4156B User’s Guide Vol.2, Edition 5
Data Variable and Analysis Function
Built-in Function
DELTA
Returns the difference of the expression .
Syntax
DELTA(
expression
)
The difference is defined as follows:
d n = (a
2
- a
1
)
when n = 1
d n = (a
n+1
- a
n - 1
)/2
when 1 < n < N
d n = (a
N
- a
N - 1
)
when n = N
Where,
d n
: difference for measurement index number n.
a
n
: value of an expression for measurement index number n.
N: number of sweep steps or number of samples.
For each primary sweep, use same definition as for basic sweep measurement and
assume measurement index number 1 for the first step of each primary sweep.
If expression is a data variable for a secondary sweep source, this function returns
the sweep step value of the secondary sweep.
Example To return the difference of
ID
:
DELTA(ID)