Matthew, Can you direct me to some online discussions regarding this? I would like to read more about it. Tom
--- In [email protected], Matthew Kaufman <matt...@...> wrote: > > On 8/27/2010 8:18 PM, wb6dgn wrote: > > > > If you reduce the modulation without reducing the receiver bandwidth, then, > > yes, the range will be reduced. You have reduced the signal without also > > reducing the noise. However, if you reduce the modulation and, at the same > > time, reduce the receiver bandwidth and audio recovery, by a like amount, > > then I do not see how the signal:noise ratio, and therefore range, would > > change appreciably. > Relationships aren't linear, or you'd be right. Reducing the modulation > index and simultaneously reducing the receiver bandwidth from 5 to 2.5 > kHz results in a situation which requires ~6 db more signal level for > the same demodulated quality (ex. 12db SINAD) > > Matthew Kaufman >
