I just dug a bit deeper and did additional noise floor measurements at lowe=
r recording level settings with the S/N100 option activated. It turned out =
that there is indeed a benefit:=0D
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REC LEVEL 5 (clipping level : -28 dBu), =0D
S/N100 off: noise floor: -124 dBu(A), dynamic range: 96dB=0D
S/N100 on: noise floor: -126 dBu(A), dynamic range: 98dB=0D
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REC LEVEL 3 (clipping level : -9 dBu),=0D
S/N100 off: noise floor: -105 dBu(A), dynamic range: 99dB=0D
S/N100 on: noise floor: -116 dBu(A), dynamic range: 107dB=0D
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See also http://www.avisoft.com/recordertests.htm http://www.avisoft.com/r=
ecordertests.htm=0D
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=0D
These results indicate that the S/N100 option obviously operates the secon=
d A/D converter at a higher (analog) gain in order to achieve the lower noi=
se floor. =0D
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=0D
At low signal levels, the recorder obviously takes the samples from the se=
cond A/D converter with the higher gain (and scales them down on the 24 bit=
sample in order to finally get the correct dBFS level). =0D
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=0D
At higher signal levels it takes the samples from the first A/D converter =
that is operated at the normal (lower) gain in order to prevent clipping.=
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Regards,=0D
Raimund=0D
=0D
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