Of not much help (because I can't find mycopy), Electronics Australia=20 (defunct) did a Spectrum Analyser project based on a TV tuner, I can't=20 recall how the sweep component worked. I vaguely recall an early Elektor=20 magazine (70's or 80's) also did one. Colin -- cdb, colin@btech-online.co.uk on 27/05/2012 =20 Web presence: www.btech-online.co.uk =20 =20 Hosted by: www.justhost.com.au =20 =20 This email is to be considered private if addressed to a named individual= =20 or Personnel Department, and public if addressed to a blog, forum or news= =20 article. =20 =20 =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .