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APPENDIX A
Setup Parameters
139
A.3
Bandwidth
A.4
Statistics
Spectrum
a
X
C
Z
The frequency analysis (1/1-octave or 1/3-octave)
will be frequency weighted in accordance with this
parameter
Note:
X = frequency weighting A or B. ‘A’ requires
that the
Broadband (excl. Peak)
parameter is set
to
AC or AZ. ‘
B’ requires that the
Broadband (excl.
Peak)
parameter is set to
BC or BZ
a. Requires 1/1-octave or 1/3-octave Frequency Analysis Software BZ-7131 or BZ-7132 respectively
Table A.4
Bandwidth parameters
Parameter
Values
Comment
Bandwidth
a
a. The Bandwidth parameter cannot be set in Type 2250-L – the setting is determined by the template.
1/1-octave
1/3-octave
Bandwidth of frequency analysis
Bottom F. for Special Leq
b
,
c
b. For BZ-7131, BZ-7132 and BZ-7133 only.
c.
Bottom F. for Special Leq
is f1 in the parameter LXeq(f1-f2)
6.3 Hz
to
Top
Frequency
1/1-octave: 8 Hz – 16 kHz
1/3-octave: 6.3 Hz – 20 kHz
Note:
The lower limit of the parameter depends on
Extended Low Frequency
Top Freq. for Special Leq
b
,
d
d.
Top F. for Special Leq
is f2 in the parameter LXeq(f1-f2)
Bottom
Frequency
to
20 kHz
1/1-octave: 8 Hz – 16 kHz
1/3-octave: 6.3 Hz – 20 kHz
Table A.5
Statistics parameters
Parameter
Values
Comment
Broadband Statistics based on
L
Xeq
L
XF
L
XS
The broadband statistics are based on sampling
the broadband parameter L
XF
or L
XS
each 10 ms
or L
Xeq
each second.
Note:
X = frequency weighting A or B. ‘A’ requires
that the
Broadband (excl. Peak)
parameter is set
to
AC or AZ. ‘
B’ requires that the
Broadband (excl.
Peak)
parameter is set to
BC or BZ
Percentile N1
0.1 to 99.9
User-defined percentile level where the value of
L
XN1
is exceeded for N1% of the elapsed time
Table A.3
(Cont.) Frequency weighting parameters
Parameter
Values
Comment
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