tshoppa@gmail.com said:
Don't have any good ideas for 14121 kHz.
Any thoughts?
I threw together a quick hack to scan for all PLL coefficients less than 50.
Here are the answers closer than 50 kHz. (I didn't remove lines with a
common factor.)
17 12 14166666.67 45667
24 17 14117647.06 3353
31 22 14090909.09 30091
34 24 14166666.67 45667
38 27 14074074.07 46926
41 29 14137931.03 16931
48 34 14117647.06 3353
So multiply by 24 and divide by 17 gets you a reasonable offset.
--
These are my opinions. I hate spam.
Hi
One practical trick is to do the divide by N shown below and simply let the
normal harmonic process do the multiply by M. If both the M / N and the
off the air signal are inside the passband of the radio, the data reduction simply
becomes the relation between the two audio tones. Yes there is some messing
around to keep the relative signal levels in the same ballpark….
If you use a PIC to do the divide, the whole process is pretty cheap ….
Bob
On May 15, 2015, at 4:29 AM, Hal Murray hmurray@megapathdsl.net wrote:
tshoppa@gmail.com said:
Don't have any good ideas for 14121 kHz.
Any thoughts?
I threw together a quick hack to scan for all PLL coefficients less than 50.
Here are the answers closer than 50 kHz. (I didn't remove lines with a
common factor.)
17 12 14166666.67 45667
24 17 14117647.06 3353
31 22 14090909.09 30091
34 24 14166666.67 45667
38 27 14074074.07 46926
41 29 14137931.03 16931
48 34 14117647.06 3353
So multiply by 24 and divide by 17 gets you a reasonable offset.
--
These are my opinions. I hate spam.
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