On Mon, Jan 10, 2011 at 01:38:44PM -0500, John Kasunich wrote: > > The HAL component is technically a decoder and counter of those signals, > but if we called it a decoder people would be really confused.
Feeding the output of a physical encoder to a software encoder leaves the signal double encoded, and me thoroughly confused. Feeding an encoded signal to a decoder means that it has been recovered. That is so simple that I'm having some trouble comprehending how that is supposed to lead to confusion? Just as a step-up transformer and transmission line is not followed by another step-up transformer to return to low voltage; a line driver's output is connected to a line receiver; and a generator is connected to a motor in an electrical drive, it follows that a decoder is _needed_ if the output of an encoder is to be used. (Whether quadrature, HDB3, stereo, or dehydrated beans.) I agree with Kirk, and believe that "double encoder" thinking is muddled and confused. Saying what we mean would be a useful step toward clarity, and reduce the steepness of the EMC2 learning curve for all. > Calling it an "encoder counter" or "encoder interface" would be better > than just "encoder", but people usually know what we mean. Likewise, > hardware boards that support quadrature signals with or without index > pulses usually call them "encoder inputs" or "encoder counters". Yup, the "encoder inputs" are fed by the encoders, but exist on the decoder. (My stereo amplifier has a "phono" input, but that doesn't mean that there's a turntable in there.) Kirk: > > It's really just mice nuts, but I'm doing jury duty right now, so I > > may me in a lawyer's frame of mind. > > Lawyers, ewww. Apologies all, if my search for clarity and accuracy also seems legalistic. Erik -- The floods in Queensland have inundated an area equal to the size of France and Germany combined. - Heard on an American news show, relayed on an Australian TV channel. ------------------------------------------------------------------------------ Gaining the trust of online customers is vital for the success of any company that requires sensitive data to be transmitted over the Web. Learn how to best implement a security strategy that keeps consumers' information secure and instills the confidence they need to proceed with transactions. http://p.sf.net/sfu/oracle-sfdevnl _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
