Svantek SVAN 958A - Page 154

154
SVAN 958A User Manual
Note: The TOTAL values, calculated in the case of sound measurements, correspond to the A,
C and LIN filters – respectively. The TOTAL values, calculated in the case of vibration measurements,
correspond to the HP, CH and CH filters – respectively, where CH denotes the filter used in the channel for
Level Meter measurement.
Table B.1.14. One-channel FFT analysis results
Word
number
Name / Value
Comment
0
0x0011
[11, 0 (block is longer than 256 words, the length is given
in the second word)]
1
FftBlockLength
2 + NFft + NFftTot
2..2+NFft
+ NFftTot
FFT[i]
value of the FFT line (*100 dB); i = 1..1..NFft + NFftTot
…
…
…
Table B.1.15. One-channel TOTALS description
Word
number
Name / Value
Comment
0
0xnn1B
[1B, nn=block_length = 1 + Ntotal*4 (words)]
1
SpectChannel
spectrum channel
2
FilterNo[1]
logical filter no. for the first total value
0, 1, 2 - standard filters
3,… - user-defined filters
3
FilterType[1]
for sound:
0
for vibration:
0 - ACC., 1 - VEL., 2 - DIL.
4
calFactor[1]
calibration factor used to modify the computed TOTAL value
5
TotValue[1]
TOTAL value computed for the filter with logical no. FilterNo or
zero value for standard filter
…
…
…
nn-4
FilterNo[Ntotal]
logical filter no. for the last total value
0, 1, 2 - standard filters
3,… - user-defined filters
nn-3
FilterType[Ntotal]
for sound:
0
for vibration:
0 - ACC., 1 - VEL., 2 - DIL.
nn-2
calFactor[Ntotal]
calibration factor used to modify the computed TOTAL value
nn-1
TotValue[Ntotal]
TOTAL value computed for the filter with logical no. FilterNo or
zero value for standard filter
…
…
…