Jerry,
This is the nth time where N is greater than 3.? ;)
You put two signals into a DBM and you get all the possible sums and differences for
the first two and all the harmonics of those two and also all the subs and differences?
Use any two numbers...
? 10 and 13mhz for a change.
?10 -> 20 ->30 ->40? The first 4 harmonics of signal 1.
?13 -> 26 ->39 ->52? The first 4 harmonics of signal 2.
?Not using matrix math.. Take the sums of each vertical pair and the differences
So those in the first column are called he first order and so on to the 4th order.?
+23? ? 46? ? ?69? ? 92? ?Some sums
-? ?3? ? ? 6? ? ? ?9? ? 12???Some Differnces
Like rabbits they multiply!? pick any two and you have more, some redundant some new.
D that enough times and headaches happen.
Any of those 16 mixed with any of those 16
and the result of that can mix as well....
For for the first rounds we have...
?3? 6? 9? 10 12 13 20 23 26 30 39 40 46 52 69 92
Pick any two of the above until you have used each with each other
for sums and differences.? There will be more than 32. and when you
line up the result you will find the gaps filling with new signals.
Now if we add a arbitrary low pass filter at 24mhz.
How many of those can get past the filter? I get not less than eight and more to come....
Not all will be strong but they are there.
Simple way is put to in get mush out.? The higher the pairs and the greater the difference
the fewer the larger products will be.? At some point they just add to the noise level as
they are numerous but extremely weak.
The other way is to take the closest pair of that mess of numbers... say 9 and 10 which
equal 1mhz and all its harmonics.? So every 1mhz you have a harmonic that can mix
with all the other numbers to may many of them some stronger than others.??
So yes you get a lot of mixed mush out.
Allison
