Hi Anon,
thanks for this explanation.
Just a thing: so if I understand well, my "new" 0 is 97.5mhz. Why if I'm
filtering at 75khz (cutoff freq) and so 97.5mhz+75khz, I can see the other
higher/lower frequencies on the fft sink?
a filter should brutally cut the frequencies after the "cutoff freq"
Hi Matteo,
It is the difference between "baseband" and "RF". If you take an RF signal
that is at 100Mhz and has a bandwidth of 2.5Khz, you can mix it with
another signal at 100Mhz and that will produce two outputs, one at 200Mhz,
and one at 0Mhz. It will still have a 2.5Khz bandwidth so on the
Hi all,
I'd like to know why does Micheal Ossmann use a Low Pass Filter in the
Lesson 1 (https://greatscottgadgets.com/sdr/1/ --> minute 22:00).
He says that in that way just frequencies near to the zero Hz can pass but
it doesn't make sensehow radio frequencies can pass if they have a
value
