I finally solved the problem, which was connected to the use of the NBFM
modulator. Swapping it for an integrator followed by a VCO, everything
works wonders. Here's the link to the working implementation of a multimode
transmitter
https://bitbucket.org/matteone/gnuradio/src/master/TX/HackRF-nbfm-
Update:
Since last night I have re-created the patch and re-built and this time
the package built with:
self._docstring_extractor.finish()
# self._docstring_extractor.wait()
try:
utils.hide_bokeh_gui_options_if_not_installed(self.blocks['options'])