Svantek SVAN 979 - Page 239

239
SVAN 979 User Manual - Appendixes
Table B.1.17. Statistical analysis parameters (relevant only in Sound measurement mode)
Word
number
Name
Comment
0
0nn09h
09h = block identifier
0nnh = block length in words
1
00pxxh
p = number of profiles, 0xxh = profile bit mask (bit mask informs for
which profiles parameters are available)
2..
ProfileStat[1]
Internal block with identifier 0Ah containing parameters of the first
profile (if the first profile bit mask is set)
...
...
...
...
ProfileStat[p]
internal block with 0Ah containing parameters of the last profile (if the
last profile bit mask is set)
…
reserved
Table B.1.18. Parameters of the profile histogram (block exists only inside the main block – see Table B.1.17)
Word
number
Name
Comment
0
0nn0Ah
0Ah = block identifier
0nnh = block length in words
1
N
number of statistical class histogram
2
BottomClass
first class histogram in 0.01 dB format
3
ClassWidth
class histogram width in 0.01 dB format
…
reserved
Table B.1.19. Octave and partial octave spectra analysis
Word
number
Name
Comment
0
004Ah
4Ah = block identifier
1
BlockLength
block length in words
2
reserved
3
SystemBase
filter database (2 or 10)
4
OctaveDivider
octave division (type of filters):
1 – octave filters
3 – 1/3 octave filters
6 – 1/6 octave filters
12 – 1/12 octave filters
5
FirstFreqIndex
index of the first filter; the exact centre filter frequency in Hertz
according to its index is given by the following formula:
f = 1000 · G
i/b
– for odd value b
f = 1000 · G
(2i+1)/(2b)
– for even value b
where:
G = 2 – for filter base 2
G = 10
0.3
– for filter base 10
i – filter index
b – octave division
6
N
number of octave or partial octave filters