12.5.7.
10:
User-defined Weighting
E,
11:
User•defined Weighting A
0
,
12:
User-defined Weighting A
1
,
13:
User-defined Weighting A
2
,
14:
User-defined Weighting A
3
,
15:
User-defined Weighting A
4
Special Parameters
10
to
15
control
the User-defined Weighting
function
which can be
selected using the Weighting Function fields in the MEASUREMENT SETUP. The User-
defined Weighting
function
is:
W(n)
=
2
E [ A
0
- _A
1
cos(
n
2
7r)
+ A
2
cos (
2n
2
7r)-A
3
cos(
3n
2
7r)
+ A
4
(4n
2
7r)]
32768 N N N N
0
~
n
~
N-1
N
= 1024
if
in Zer:o Pad
Mode
N = 2048
if
not in
Zero
Pad
mode
The sum
of
the
coefficients
A
0
to
A
4
must
be equal
to
or
less than 32768.
12.5.8.
16:
Transient Taper L
Special Parameter 16 is used
to
define the
width
in number
of
samples
of
a leading
half-cosine
taper
added
to
the Transient Weighting function. The
resultant
weighting
function
is selected
by
setting the Weighting Function fields
of
the MEASUREMENT
SETUP
to
Transient.
12.5.9.
17:
Transient Taper T
Special Parameter 17 is used
to
define
the
width
in
number
of
samples
of
a
trailing
half-cosine
taper
added
to
the Transient Weighting function. The resultant
weighting
function
is selectec;t by setting the Weighting Function fields
of
the MEASURMENT
SETUP
to
Transient.
12.5.10
18:
Exponential Taper
Special Parameter 18 is used
to
define
the
width
in number
of
samples
of
a leading
half-cosine
taper
added
to
the Exponential Weighting function. The resultant
weighting
function
is selected by setting the Weighting Function fields
of
the MEASUREMENT
SETUP
to
Exponential.
12.5.11.
19:
Exponential Delay
136
Special Parameter 19 is used
to
define a delay in number
of
samples
from
the
shift
setting
of
the ExpQnential Weighting
function
to
the
start
of
the exponential
decay
defined
by
the width setting. During the delay, the
weighting
function
equals
1.
The
resultant weighting 1unction is selected by setting the Weighting Function fields
of
the
MEASUREMENT SETUP to
Exponential.
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