There are also loop gain and phase shift requirements to be met for
stable operation (ie with no asynchronous modes).
Bruce
Greg Broburg wrote:
10.000005 = 26 - 15.999995
15.999995 = 26 - 10.000005
This pair of equations is insufficient to define
that the ratio between these two frequencies
is exactly 1.6 : 1 or 1 : 1.6
There must be an additional concept here.
Greg
On 4/9/2011 6:59 PM, Hal Murray wrote:
bruce.griffi...@xtra.co.nz said:
The 16MHz is necessary for the loop to function: The mixer mixes
down the
26MHz to a pair of conjugate frequencies, 10MHz and 16MHz. Thermal and
device noise is sufficient to start the process.
10MHz = 26MHz - 16MHz
16MHz = 26MHz - 10MHz
What makes it stable at 10 and 16 MHz rather than 10.000001 and
15.999999?
I'm assuming we are starting with a good 26 MHz crystal and that it
would be hard to get filters that good.
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