Hi Alexander,
I see exactly what is shown in the tutorial and I don't see any
harmonics. There are a two "shoulders" left and right to the signal,
which are caused by the window function, which is applied by the
Frequency sink to reduce spectral leakage. When I increase the lower
boundary of the Frequency sink I can also see a lot of "noise" around
-180dB, which is caused by numerical instability. Everything as
expected... or did I get your question wrong?
Best,
Fabian
Am 30.03.22 um 08:19 schrieb Alexander Plotnikov:
Greetings everyone!
Can anybody please explain to me why in this example
(https://wiki.gnuradio.org/index.php?title=Your_First_Flowgraph) the
spectrum graph shows a harmonic far below 0dB?
Thanks everyone in advance!
Alexander
