Thank you, Kevin. That is reassuring. My next question then, is since the deviation is affected by both amplitude and frequency, how would you recommend I empirically determine/set a peak deviation of 2400Hz for 1200Hz baseband? Is this experiment not possible to visualize/determine on a waterfall, simply?
On Mon, Jun 26, 2017 at 1:26 PM, Kevin Reid <kpr...@switchb.org> wrote: > On Mon, Jun 26, 2017 at 10:07 AM, Brashendeavours < > brashendeavo...@gmail.com> wrote: > >> Where my results differ from what I expect, is approximately above 100Hz. >> Using an baseband of 1200Hz, I no longer get a signal sweeping from -ive to >> +ive, I get [a constant frequency of 1200Hz on the waterfall]( >> http://imgur.com/BqGsRtK), and aliased multiples. >> >> I believe that my sample frequency of 48000 is sufficient as my mf is >> 2400, and baseband is 1200. >> >> BW is (2 * (1200 + 2400)) = 7200Hz >> Nyquist is 2*BW = 14400Hz >> >> So, what am I doing wrong? Thanks in advance! >> > > You're not doing anything wrong, and those are not aliases. They are the > sidebands which result from frequency modulation. >
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