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 lo
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 of