Svantek SVAN 958A - Page 167

167
SVAN 958A User Manual
Table B.1.43. FFT cross-spectrum settings
Word
number
Name / Value
Comment
0
0xnn34
[34, nn=block length]
1
RefChannel
reference channel
2
Nval
number of spectrum values
3..6
CSEnabled
cross-spectrum enabled for channel from 1 to 4
7..8
CSTabPopr1
correction value for the 1
st
channel in dB*100
9..10
CSTabPopr2
correction value for the 2
nd
channel in dB*100
11..12
CSTabPopr3
correction value for the 3
rd
channel in dB*100
13..14
CSTabPopr4
correction value for the 4
th
channel in dB*100
15..19
MinValTab
minimum limit values for channels from 1 to 4 in dB*100
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Table B.1.44. FFT cross-spectrum results from one channel
Word
number
Name / Value
Comment
0
0x0035
[35, 00=block length in the next word]
1
BlockLen
block length
2..
FirstCSVal
complex cross-spectrum value for the 1
st
frequency line as 2 (real and
imag.) floating point values: 24-bits mantissa, 8-bits exponent
...
...
...
..
LastCSVal
complex cross-spectrum value for the last frequency line as 2 (real
and imag.) floating point values: 24-bits mantissa, 8-bits exponent
…
…
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Table B.1.45. Sound Intensity analysis
Word
number
Name / Value
Comment
0
0x0036
[36, 00=block length in next word]
1
BlockLen
block length
2
channelA
channel of intensity probe input A
3
channelB
channel of intensity probe input B
4
Distance
probe microphones distance in mm
5
Int_n_val
number of results
6..
int_n_val+6
intVal[i]
intensity result for i-th FFT frequency line in dB*100
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