Svantek SV 977D - Page 292

292
SV 977D User Manual - Appendixes
Sampling frequency 48 kHz or 96 kHz (internal only)
Analogue to digital converter 1 x 24 bit
Reference range High
Input attenuator accuracy  0.1 dB (for f = 1 kHz and T = +23°C)
Internal oscillator accuracy 0.01 % (for f = 1 kHz and T = +23°C)
Antialiasing filter
Built-in antialiasing filter. Second-order analogue filter, passive Class, combined with on-chip FIR digital filter
of the analogue-to-digital converter, ensuring correct sampling of the measured signal.
Pass band (-1 dB) 22.200 kHz or 44.4 kHz
Pass band (-3 dB) 23.520 kHz or 47.0 kHz
Stop band 26.256 kHz or 52.53 kHz
Attenuation in the stop band > 80 dB
1/1 and 1/3 octave filters noise levels
Typical electrical noise levels HP/HPE-weighted for SV 977D in configuration with ST 08 adapter and 50 Ohm
BNC terminal for 1/1 octave filters. Averaging time 30 s.
Table C.3.8. Typical electrical noise levels HP/HPE-weighted for SV 977D in configuration with ST 08
adapter and 50 Ohm BNC terminal for 1/1 octave filters
1/3 octave central
frequency
Low range
High range
[Hz]
[µV]
[µV]
1
0.4
2.8
2
0.4
2.5
4
0.3
2.4
8
0.4
2.5