I have a bit of a confusion concerning the decimating Channel filter in
the stock receive_path.py script that I'm using with the GMSK rx and tx
python script:
The filter coefficients for the chan_filt filter are determined by the
gr.firdes.low_pass() function, which takes, among other arguments, the
midpoint and the width of the transition band. In the gr_firdes.h
file it is specified that the units for these arguments is Hz, but in
the code it says that the midpoint of the trans. band is "1.0".
The script correctly receives data on a much larger band than 1 Hz, so
what am I missing? Is the value somewhere being changed to
designate a different value at the filter's level?