Thompson.PA@XEROX.COM.UUCP (11/23/87)
Roy- Tel-Autograph has been around forever. I remember first seeing them around 20 years ago and they were old then. My understanding is that they were all analog and that the pantograph arms controlled potentiometers in the transmitter. I don't know whether they just transmitted a variable DC voltage or if they varied a frequency. It was basically a remote handwriting scheme. When you finished you pushed the stylus/pen in the holder and it did a paper feed at each end. They were used fairly heavily in factory floor applications especially in nosiy enviroments like steel mills. I don't know whether they are sill around or whether they ever updated teh product to digital signalling. I seriously doubt if there was ever a "standard" for signalling since it was a propriatary product. Geoff Geoffrey O. Thompson Xerox Corporation 475 Oakmead Parkway Sunnyvale, CA 94086 U.S.A Telephone: (408) 737-4690 ARPA Mail: Thompson.OSBUNorth@Xerox.COM