Herbert, look at this http://www.science-workshop.com/ This one goes 2150 mhz. Derward Myrick ----- Original Message -----=20 From: "Herbert Graf" To: "Microcontroller discussion list - Public." Sent: Tuesday, June 28, 2011 10:49 AM Subject: Re: [EE] Build a spectrum analyzer > On Tue, 2011-06-28 at 11:44 -0400, Sean Breheny wrote: >> One fairly common way to make a cheap spectrum analyzer for <1GHz is >> to use a surplus TV tuner module, the kind which used to be on >> computer analog TV input cards. These can be set up to take RF in, >> give a single IF frequency out (often 45MHz or 10.7 MHz), and take a >> tuning voltage input. These would allow you to tune from about 40MHz >> to 1GHz. They also often have built-in AGC with a signal strength out >> pin. You then can amplify the output, apply a much narrower filter, >> and feed it to a log-amp detector IC. Then, the combination of the AGC >> level out plus the output of the log amp would be your signal strength >> in the BW of the narrow filter. >>=20 >> I bought a few of these tuner modules on eBay for only a dollar or two >> each just a few months ago. They came with documentation, too. >=20 > Thats exactly the kind of thing I'd like to find! Any pointers? Willing > to sell the ones you've got? :) >=20 > How would I go about searching for something like that? The > documentation would of course be key, don't want to try and figure > pinouts of modules on my own? >=20 > Thanks, TTYL >=20 > --=20 > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .