Russ Hines <russ@...>
Well, having worked as a broadcast engineer in the U.S. for nearly the last 30 years, all I can say is... HUH?!?!?ï¿½ I have no idea what Jose's been smokin', but it must be REALLY good. ;-)toggle quoted messageShow quoted text
I'm into versatility, but there is such a thing called "mission creep," and I'm guessing that's where this is going.ï¿½
For communications purposes, deviation for FM is +/-5kHz is wide, +/- 2.5kHz is narrow.ï¿½ IMHO, 6kHz should work just dandy for both full-carrier AM and wide FM.
But if you really want to include it, then for U.S. broadcast, the channels for FM are 200kHz wide, max modulating frequency is 15kHz, 100% modulation is +/- 75kHz deviation, and all subcarriers are AM modulated.ï¿½ For the AM broadcast band, the channels are 10kHz wide, max modulating frequency is about 5kHz.ï¿½ Now that's assuming you don't incorporate IBOC "HD" radio that you wouldn't be able to include anyway unless you paid a horrendous licensing fee to Ibiquity.
But if you're willing to go that far, how about a incorporating an ATSC/DVB/COFDM/16QAM/64QAM/FLO digital television demod?ï¿½
See where mission creep can lead you. ;-)
Simon, your SDR Console is a really nice, useful communications tool for SDR enthusiasts, not a table top radio/stereo/MP3/8-track player/alarm-clock/coffee-maker.ï¿½ I wouldn't worry trying to make it all things to all people because no one will ever be satisfied, and a once-useful tool with promise will become bloated and impossible to use.
Again, just IMHO.
73, Russ WB8ZCC
On 1/4/2011 3:03 PM, jose maria trueba wrote: