--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##Float to Complex:
+## one or two input streams
+###################################################
+ -->
+<block>
+ <name>Float To Complex</name>
+ <key>gr_float_to_complex</key>
+ <import>from gnuradio import gr</import>
+ <make>gr.float_to_complex($vlen)</make>
+ <param>
+ <name>Vec Length</name>
+ <key>vlen</key>
+ <value>1</value>
+ <type>int</type>
+ </param>
+ <check>$vlen > 0</check>
+ <sink>
+ <name>in</name>
+ <type>float</type>
+ <vlen>$vlen</vlen>
+ </sink>
+ <sink>
+ <name>in</name>
+ <type>float</type>
+ <vlen>$vlen</vlen>
+ <optional>1</optional>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>complex</type>
+ <vlen>$vlen</vlen>
+ </source>
+</block>