I want to add a phase shift block to a grc flowgraph that is controlled by a scrollbar. Searching for "phase shift block" returns several suggestions from several years ago to use the "Multiply Const" block with the argument: "math.cos(angle), math.sin(angle)" in the "const" field. If I try that I get the error:
Expression None is invalid for type 'complex'. I can enter fixed complex variables or references to other variables or parameters, I just can't do trig functions. I'm currently using the equation: "pow(10,snr/20.)" in a Noise Source block and it understands that just fine. Is there a way to do trig functions in a block field? I'm currently using a clean install and build of gnuradio retrieved from git a few days ago, but this issue has been the case for the several versions I've retrieved and built over the past year or so. I ended up building a hier block with complex_to_magphase, add constant, and the magphase_to_complex but that seems very inefficient. The transcendental function seems to be oriented to streams rather than constants that rarely change. I also considered an OOT block but that also seems like overkill. Surely I'm missing something really simple. Thanks! _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
