DEWESOFT SIRIUS Series User Manual

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SIRIUS
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TECHNICAL REFERENCE MANUAL 
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6.1.5.2. ADC digital filter and oversampling 
SIRIUS® will automatically adjust the oversampling depending on the sample rate. 
The digital filter cut off frequency is automatically set to half of the sample rate and the internal                  
sampling frequency is up to 256 times higher than the output rate: 
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Digital Filter (vs. Sample Rate) 
0.1 ... 51.2 kS/s 
51.2 ... 102.4 kS/s 
102.4 ... 204.8 kS/s 
Bandwidth (-3 dB) 
0.494 fs 
0.49 fs 
0.38 fs 
Alias-free Bandwidth 
DC to 0.42 fs 
DC to 0.32 fs 
DC to 0.22 fs 
Alias Rejection 
-95 dB 
-92 dB 
-97 dB 
Delay through ADC 
12 / fs 
9 / fs 
5 / fs 
Oversampling 
256 
128 
64 
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The filter characteristics of the digital ADC filter will also change automatically depending on the               
sample rate. 
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Sample rate 100 Hz to 51.2 kHz stopband rejection 
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SIRIUS
®
V20-1 282 / 336  

DEWESOFT SIRIUS Series Specifications

General

Brand	DEWESOFT
Model	SIRIUS Series
Category	Data Loggers
Language	English