[Discuss-gnuradio] translating the signal from baseband to RF

[Michael Ford]

With these old tutorials, it's hard to determine what blocks I should
or should not be using. I've been messing around with wxpython in my
transmission code in order to visually aid with any problems that might
arise. With Tune(), I'm able to see corresonding differences in the
received signal strength based on what I set the center frequency to
be. However, the files that I send are not picked up on the receiving
side. 


After setting up a GUI with wxpython, I think I can see why these files
are not sending properly. It seems that no matter what I set the center
frequency to, the window that I've attatched the modulator to always
shows the output centered around 0Hz. I've been using
gr.frequency_modulator_fc() for modulation, but upon looking at the
header file, I see that the output is a complex signal at baseband.
Furthermore, nothing in the modulation code leads me to believe that
the center frequency I tune to has anything to do with the modulation
itself. Is there another block I should be using to translate the
signal to the RF?