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DSP app to multiply tone by 4
?
One thing that one of the PA (Dutch PA) stations spotted , is the 477
band is a handy divide by 4 from 1.9MHz .. and if you use two
flip-flops
, you can divide from 1.9 to 477
Setting the rtty shift x 4 in fl digi
340 HZ , then gives 85 Hz at 477
A problem with the multi tone modes ,
unless its possible to write a 'dsp'
app , that multiplies the tones by 4 ,
single tone fixed amplitude in
real-time or slightly after ,
That would open up all the (non linear) modes
to 477 , X2 for 'logic'
drive amps, X2 drive, and X4 for conventional on
frequency amps ?
Q Is this a possibility ?
Could something be coded , that either
looked like a sound card , or took audio in
, and outputted a multiplied frequency by
2 or 4
Could have delay as long as the
delay was fixed ?
G..
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