Hi Julien,
Most MIO devices use a multiplexed architecture for multi-channel acquisitions. In these setups, an analog MUX “moves” the ADC rapidly from one channel to the next. Because the individual channels are not sampled at exactly the same time, this introduces an artificial phase delay when signals are compared between channels. Simultaneous sampling between all channels is a requirement in high-speed applications that involve Digitisers. The reason for this is that phase between channels is important for Digitiser applications and can only be measured accurately when all channels are simultaneously sampled. Digitisers, DSA, and S-Series DAQ products use separate ADCs per channel to achieve a tight phase relationship between channels.
Dynamic Signals are those in which you wish to examine the spectral (frequency-domain) content using analysis such as power / phase spectrum, octave analysis, order analysis, frequency response. Examples include sound, vibration, power consumption, and signal level.
Hope this helps,
