Just got two naive questions, but I've never thought about them seriously.
1. A Python programming question
In gmsk_test.py, send_pkt() and rx_callback() are two inner functions
of the outer function main(). However, in send_pkt(), the object "fg"
is used, in rx_callback(), the object "st" is used. But I remember that
the local name space of the outer function is invisible to the inner
function. Can anyone of you guys help me with this question?
2. Is GNU Radio capable of transmitting and receiving at the same time?
Particularly, they are operating using two different frequencies?