Vector Insert gr_vector_insert_x from gnuradio import gr gr.vector_insert_$(type.fcn)($vector, $period, $offset) Output Type type enum Byte byte fcn:b vec_type:int_vector Complex complex fcn:c vec_type:complex_vector Float float fcn:f vec_type:real_vector Int int fcn:i vec_type:int_vector Short short fcn:s vec_type:int_vector Vector vector 0, 0, 0 $type.vec_type Periodicity period 100 int Offset offset 0 int in $type out $type Periodicity, the length of the periodicity at which the vector should be inserted at the output. (i.e. one vector for every N output items) Offset sepcifies where in the cycle period we should begin at.