Svantek SV 977D User Manual

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SV 977D User Manual - Appendixes
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.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
10
N
number of spectra bands
11
T
number of total results (if there is only one total result, it is calculated
with the same filter and in the same band as the spectrum – see offset
17)
12
Band
analysis band (approximate values):
0 – 40 kHz band
1 – 20 kHz band
2 – 10 kHz band
3 – 5 kHz band
4 – 2,5 kHz band
5 – 1,25 kHz band
6 – 625 Hz band
7 – 312 Hz band
8 – 156 Hz band
9 – 78 Hz band
13
Window
window function:
0 – Hanning
1 – Rectangular
2 – Flat Top
3 – Kaiser-Bessel
14
WindowFactor
window correction factor in 0.01 dB format
15
Averaging
type of averaging:
0 – linear averaging
1 – exponential averaging
16
TimeConst
time averaging constant in milliseconds (exponential averaging only)

Svantek SV 977D Specifications

General

Brand	Svantek
Model	SV 977D
Category	Measuring Instruments
Language	English