SIRIUS
®
TECHNICAL REFERENCE MANUAL
Image below “Sampled (discrete) signal” shows the sampled version of the signal above “Continuous
signal”. The actual data consists only of the sampled points that you see as red dots in the diagram. The
lines in between the points are just interpolated.
Sampled (discrete) signal
Image below “Slower sampled (discrete) signal” shows another sampled version of the signal in image
“Continuous signal”. But in comparison to image “Sampled (discrete) signal” we used a lower sample
rate in this case. Because of the lower sample rate, we have fewer data points acquired and thus the
interpolated signal does not resemble the original signal as good as “Sampled (discrete) signal” does.
Slower sampled (discrete) signal
The sampling rate (aka. sample rate, sampling frequency) defines the number of samples per second
taken from the continuous signal to create the discrete signal. The unit for the sampling rate is hertz
(Hz) . The inverse of the sampling frequency is the sampling period or sampling interval, which is the
time between samples.
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