Svantek SVAN 958A - Page 211

211
SVAN 958A User Manual
FFT calculation time step (with spectra logging)
for 1920 lines, 100 ms
for 960 lines, 50 ms
for 480 lines. 20 ms
Table C.3.6. FFT analysis for the 480 lines spectrum (with logging)
FFT bandwith
[Hz}
Record length
(samples)
Frequency resolution
[Hz]
Overlapping factor
%
22 400
1024
46.875
6
11 200
1024
23.4375
53
5 600
1024
11.71875
76
2 800
1024
5.859375
88
1 400
1024
2.9296875
94
700
1024
1.46484375
97
350
1024
0.732421875
98
175
1024
0.366210938
99
87.5
1024
0.183105469
>99
Table C.3.7. FFT analysis Table for the 960 lines spectrum (with logging)
FFT bandwith
[Hz}
Record length
(samples)
Frequency resolution
[Hz]
Overlapping factor
%
22 400
2048
23.4375
-17
11 200
2048
11.71875
41
5 600
2048
5.859375
70
2 800
2048
2.9296875
85
1 400
2048
1.46484375
92
700
2048
0.732421875
96
350
2048
0.366210938
98
175
2048
0.183105469
99
87.5
2048
0.091552734
>99