Svantek SVAN 979 - Page 251

251
SVAN 979 User Manual - Appendixes
Table B.3.5. RPM measurement results
Word
number
Name
Comment
0
0nn1Fh
1Fh = block identifier
0nnh = block length in words
1..2
ROT
lower and higher word of the last value of RPM measured during the
measurement cycle; the value of the result is calculated according to
the formulas:
rps = 1/d – number of revolutions per second,
rpm = 60/d – number of revolutions per minute
where:
d = m · 2
w
m = ((H & 7Fh)<<16) + ((L & 7FFFh)<<1)
w = ((H>>8) & 7Fh) – 87
L – lower word of the result
H – higher word of the result
& – bit product operator
>> – bit right shift operator
<< – bit left shift operator
3..4
RMAX
lower and higher word of the maximum value of the rpm measured
during the measurement cycle; the value of the result is calculated
according to the formulas given in the comment of the ROT result
5..6
RMIN
lower and higher word of the minimum value of the rpm measured
during the measurement cycle; the value of the result is calculated
according to the formulas given in the comment of the ROT result
…
reserved
Table B.3.6. Loudness measurement results
Word
number
Name
Comment
0
001Eh
1Eh = block identifier
1
BlockLength
block length in words
2
OverloadFlags
overload flags:
bit 0 – level 130 dB exceeded,
bit 1 – measurement path overloaded
3..242
BarkVal[1..240]
240 values of the bark spectrum in the format 0,1 son
243
BarkTotalVal
value of the total result in the format 0,1 son
…
reserved
Table B.3.7. Results of octave and partial-octave analysis
Word
number
Name
Comment
0
0nnxxh
0xxh = block identifier:
04Bh – results of averaged spectrum
04Ch – results of minimum spectrum
04Dh – results of maximum spectrum
0nnh = block length in words
1
reserved
2
Result[1]
value of the first result in the format 0,01 dB
3
Result[2]
value of the second result in the format 0,01 dB