Svantek SV 977D - Page 283

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SV 977D User Manual - Appendixes
Digital filters
Weighting filters
• Z according to IEC 61672-1:2013 for Class 1,
• A according to IEC 651 and IEC 61672-1:2013 for Class 1,
• C according to IEC 651 and IEC 61672-1:2013 for Class 1,
• B according to IEC 651 for Class 1,
• U according to IEC 61012:1990 for Class 1,
• AU according to IEC 61012:1990 for Class 1,
• D according to BS 5721:1979,
• HP high-pass filter,
• HPE high-pass filter for the Ultra frequency band.
See Chapter C.4 for filters characteristics.
1/1 and 1/3 octave filters – see Chapter C.3.3 for filters characteristics.
Linear operating ranges
Two measurement ranges are available: Low and High.
Table C.3.1. Linear operating range with SV 12L preamplifier and ST 02 adapter
Range
Linear operating range (with 10 dB margin from noise)
(RMS for the sinusoidal signal at reference conditions @ 1 kHz,
0.0 dB calibration factor)
Low
from 15 μV
RMS
“A” – weighting
to 1.08 V
RMS
“A” – weighting
from 18 μV
RMS
“B” – weighting
to 1.08 V
RMS
“B” – weighting
from 18 μV
RMS
“C” – weighting
to 1.08 V
RMS
“C” – weighting
from 32 μV
RMS
“Z” – weighting
to 1.08 V
RMS
“Z” – weighting
from 32 μV
RMS
“HP” – weighting
to 1.08 V
RMS
“HP” – weighting
from 15 μV
RMS
“AU” – weighting
to 1.08 V
RMS
“AU” – weighting
from 32 μV
RMS
“U” – weighting
to 1.08 V
RMS
“U” – weighting
from 32 μV
RMS
“D” – weighting
to 1.08 V
RMS
“D” – weighting
High
from 56 μV
RMS
“A” – weighting
to 7.64 V
RMS
“A” – weighting
from 56 μV
RMS
“B” – weighting
to 7.64 V
RMS
“B” – weighting
from 56 μV
RMS
“C” – weighting
to 7.64 V
RMS
“C” – weighting
from 100 μV
RMS
“Z” – weighting
to 7.64 V
RMS
“Z” – weighting
from 100 μV
RMS
“HP” – weighting
to 7.64 V
RMS
“HP” – weighting
from 56 μV
RMS
“AU” – weighting
to 7.64 V
RMS
“AU” – weighting
from 100 μV
RMS
“U” – weighting
to 7.64 V
RMS
“U” – weighting
from 126 μV
RMS
“D” – weighting
to 7.64 V
RMS
“D” – weighting