More than likely for radio frequency tuning. Using an encoder to control the tuning of a Direct Digital Synthesizer. Tuning up and down in frequency in as small as 1 Hertz increments. For my High Sierra HS1800/Pro adjustable antenna, I utilize SWR readings to adjust it. I also have an automatic device that controls the radio tuning sequence and then runs the motor of the antenna until the SWR measurement is where I set it to be originally.
Step motors however would be very useful for satellite communications. Gary Fiber K8IZ At 01:25 PM 6/13/2009, you wrote: >I was Googleing for encoders when I found a bunch of radio amateur web pages >where people have made DIY encoders with the following chip: >http://www.austriamicrosystems.com/eng/Products/Magnetic-Encoders/Rotary-Encoders/AS5040 > >Anyone tried it? It looks really nice even though it may be too few pulses >for some of you guys. >I have 400 ppr on my router, gear ratio 3:1 on 5 mm/rev ballscrews, so it's >still more precise than the machine can handle. > >Why do radio amateurs build encoders? Automatic antenna adjustment. :) >------------------------------------------------------------------------------ >Crystal Reports - New Free Runtime and 30 Day Trial >Check out the new simplified licensing option that enables unlimited >royalty-free distribution of the report engine for externally facing >server and web deployment. >http://p.sf.net/sfu/businessobjects >_______________________________________________ >Emc-users mailing list >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users Gary Fiber K8IZ GROL PG-19-6691 Washington State Resident ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
