Path: utzoo!utgpu!watserv1!watmath!att!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!samsung!uunet!decwrl!bacchus.pa.dec.com!shlump.nac.dec.com!rgb.dec.com!sreekanth From: sreekanth@rgb.dec.com (Jon Sreekanth) Newsgroups: sci.electronics Subject: Re: Re:Analog Signal on Floppy Drives? Message-ID: <13807@shlump.nac.dec.com> Date: 24 Jul 90 16:39:40 GMT Sender: newsdaemon@shlump.nac.dec.com Organization: Digital Equipment Corporation Lines: 35 In article <13183@mcdphx.phx.mcd.mot.com>, hbg6@citek.phx.mcd.mot.com writes... >In article kz08+@andrew.cmu.edu (Ken Zuroski) writes: >> >>Can anyone tell me if this is a common thing, that is, storing analog >>information (or rather, storing information in analog) on media >>conventionally used to store digital info? Obviously the hardware > >We evaluated an inspection system in our plant about 8 months ago which >stored frames of video onto a 3 1/2" hard drive. The idea was to store an >image of a perfect circuit board in the system, then electronically compare >it to a live image of the same board type. > >It's difficult to get any hard technical details from a salesman but as I >understand it, one frame takes up one track on the media. One field is on >side one and one field is on side two. As the disk rotates, it switches from >one side to the other to construct the full frame. > John, I tried sending you email, but it bounced. About the inspection system you mentioned : I assume it was storing digitized (compressed) images on the hard disk, in which case it's just conventional technology ? Or was it actually a hardware-modified drive ? Thanks, / Jon Sreekanth US Mail : J Sreekanth, 79 Apsley Street, Apt #7, Hudson, MA 01749 Digital Equipment Corp., 77 Reed Road, HLO2-1/J12, Hudson, MA 01749 email : sreekanth@rgb.dec.com Voice : 508-562-3358 eves, 508-568-7195 work