> On 02/08/2016 08:52 PM, Nicklas Karlsson wrote: > >> Noise in analog will reduce the effective resolution, whereas noise in > >> digital can be easily filtered and the resolution stays constant. > >> Analog signals cannot be isolated easily and trying so results in > >> awkward non-linearities that need to be compensated. A digital signal is > >> easily isolated and does not require complex compensation. > > > > Yes analog signals certainly have problems in particular with > > isolation barriers and noise but replacing with high resolution and > > bandwidth require quite a lot of bits per second. > > It is a misconception, to think that the bandwidth of an analog channel > is higher than a digital one. It is actually reversed, where the > /effective/ bandwidth of a digital channel is higher than an equivalent > analog channel. > > The number of bits required goes to the root of Shannon's information > theory. We see how effective it is in our daily life everywhere and it > is better than analog. > > Telephony has been digitalized completely today. Television has > transitioned from analog to digital, freeing more than 50% of the > bandwidth, while increasing the number of channels. Radio will follow > (currently running parallel). > > > -- > Greetings Bertho
Greatest advantage with digital is lossless transmission. Then analog level start to detoriate it may be brought back to digital and resent for examle then changing the medium it is sent thru. With a sample frequency of 1kHz up to maximum 500Hz analog signal is possible. Fast control loop require quite a lot of bits per second and good real time performance. Then it come to RS-232 and RS-485 limitations might be hit. ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
