On 2023-05-21 09:19, Bill Leonard N0CU wrote:
That is the same approach that Ten Tec used. It seems like a good
approach in theory, but the devil is in the details.
*** I wonder if it could be simulated in software? Mix the audio up
in software - that's easy... just multiply these samples by those samples.
Brick wall filters, also easy. Chopping the simulated RF? Trivial.
Etc.
A PJRC Teensy 4.x running at 600MHz would have plenty of horsepower
for this task.
- Jerry, KF6VB
There are several
potential problems. First, the filter only removes out-of-band
distortion products that were generated prior to the filter. It
doesn¡¯t do anything with the in band products, nor does it do
anything with the products generated after the filter. If I remember
correctly, the products generated by the 2nd (down conversion) mixer
were the biggest problem. --
Bill N0CU
Links:
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[1] /g/DRAKE-RADIO/message/71365
[2] /mt/99045651/243852
[3] /g/DRAKE-RADIO/post
[4] /g/DRAKE-RADIO/editsub/243852
[5] /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
