josephc@nntp-server.caltech.edu (Joseph I. Chiu) (12/28/90)
I need all the help I can get, and thanks in advance to everyone for reading this post... For my 3rd sophomore project (or possibly my senior project, depending on when I have sufficient information), I would like to build a computer controlled radio receiver. What I would like to build, essentially, is a scanner-like device that covers the 25 MHz to 1300 MHz spectrum. (It is not unreasonable, I should think, since many scanners nowadays cover the above spectrum) Although I understand the theory behind the operation, I do not have any practical information on how to go about generating the desired frequencies, how to use PLL's (are they even necessary if given a stable frequency source?), and -gulp- how to demodulate FM. (Apparently, there are 'Narrow' and 'Wide' modes of FM.) Could someone recommend a good cookbook (if any), magazine articles, or even offer a hand? My current goal for the project, basically, is to build a prioritized, dual tuning scanner that monitors all (interested) channels, and will continue to monitor other channels while 'reading' one channel so that if a channel of a higher priority breaks in, it will go to that one. Again, thanks in advance. -- Joseph . -- -- josephc@coil.caltech.edu ...Just another lost soul in the universe
teb@uqun38.nixdorf.de (Tobias Brueck) (01/02/91)
josephc@nntp-server.caltech.edu (Joseph I. Chiu) writes: >I need all the help I can get, and thanks in advance to everyone for >reading this post... >Could someone recommend a good cookbook (if any), magazine articles, or even >offer a hand? My current goal for the project, basically, is to build a >Again, thanks in advance. >josephc@coil.caltech.edu ...Just another lost soul in the universe I think a few month ago there was an article in a german electronic-magazine , for a PC-RADIO . It was only for the UKW-Band ( 87-108MHZ FM ) . The Problem with lower frequencies is to get interferences and noise on AM . This will be produced by harmonic of your Computerclock . But , if you interest I'll send you a copy . ***** The world looks good , if I close my eyes ****** ============================================================================= | Tobias Brueck | Siemens-Nixdorf-Informationssysteme AG | WI-FF-382 | | D-W-4790 Paderborn | Heinz-Nixdorf-Ring | Phone: inter-5251-10-5815 | | Federal Republic of Germany | Republique Federale d'Allemagne | ============================================================================= | europe: eunet : ..!unido!nixpbe!brueck.pad | brueck.pad@nixdorf.com... | | usa: usenet: ..!linus!nixbur!brueck.pad | | =============================================================================