Re: W-FM
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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?!?!?� I have no idea what
Jose's been smokin', but it must be REALLY good. ;-)
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I'm into versatility, but there is such a thing called "mission creep," and I'm guessing that's where this is going.� For communications purposes, deviation for FM is +/-5kHz is wide, +/- 2.5kHz is narrow.� 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.� For the AM broadcast band, the channels are 10kHz wide, max modulating frequency is about 5kHz.� 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?� 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.� 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:
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