Svantek SVAN 979, Руководство пользователя

Страница: 240 / 377

240
SVAN 979 User Manual - Appendixes
Word
number
Name Comment
7 T
number of total results; total results, depending on the measurement
mode, are calculated with the following filters:
in vibration measurement mode:
Total[1]
– measurement with HP filter
Total[2]
– measurement with a filter from the second profile
Total[3]
– measurement with a filter from the third profile
in sound measurement mode:
Total[1]
– measurement with A filter
Total[2]
– measurement with C filter
Total[3]
– measurement with Z filter
8 Filter
spectrum measurement filter:
0
–
HP
1
–
Z
2
–
A
3
–
C
5
–
B
9 Detectors
type of RMS detectors for spectra:
0
– linear detector (
Linear )
1
– exponential detector
Fast
2
– exponential detector
Slow
10 Band
frequency range:
0
– full band (
Full )
1
– audible band (
Audio )
… reserved
Table B.1.20. Parameters of 1/1 and 1/3 octave spectra histograms
Word
number
Name Comment
0 0nn13h
13h = block identifier
0nnh = block length in words
1 N
number of histograms (spectra bands and total results)
2 NofClasses
number of statistical histogram classes
3 BottomClass
first class histogram level in 0.01 dB format
4 ClassWidth
histogram classes width in 0.01 dB format
… reserved
Table B.1.21. Parameters of FFT analysis
Word
number
Name Comment
0 0051h
51h = block identifier
1 BlockLength
block length in words
2..6
reserved
7..8 M
frequency resolution (total value of the mantissa)
9 E
frequency resolution (binary exponent); exact resolution of the
frequency in Hertz is given by the following formula:
∆
F
= M · 2
E