[Discuss-gnuradio] /gnuradio-examples/python/digital/transmit_path.py and bitrate Question?

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I've been trying to analyse the transmit_path.py script and stumped with the bitrate value.   I see bitrate being brought in from the options and also derived from pick_bitrate but I don't see where somthing is being done with it.   I know that the bitrate is being used but for the life of me I can't see where something is being set with the bitrate.   I see there is a bitrate fuction and it returns the bitrate......I thought that somethnig is calling that function and there's where the bitrate is being used......I looked but can't seem to find where the bitrate function is being called either in this script or by any other script.   Does some one know where the bitrate is being used/set?

 

Cheers,

Jody