<?xml version="1.0"?> <!-- ################################################### ##Quadrature Demodulator ################################################### --> <block> <name>Quadrature Demod</name> <key>gr_quadrature_demod_cf</key> <import>from gnuradio import gr</import> <make>gr.quadrature_demod_cf($gain)</make> <callback>set_gain($gain)</callback> <param> <name>Gain</name> <key>gain</key> <type>real</type> </param> <sink> <name>in</name> <type>complex</type> </sink> <source> <name>out</name> <type>float</type> </source> </block>