--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##Simple Squelch
+###################################################
+ -->
+<block>
+ <name>Simple Squelch</name>
+ <key>gr_simple_squelch_cc</key>
+ <import>from gnuradio import gr</import>
+ <make>gr.simple_squelch_cc($threshold, $alpha)</make>
+ <callback>set_threshold($threshold)</callback>
+ <callback>set_alpha($alpha)</callback>
+ <param>
+ <name>Threshold (dB)</name>
+ <key>threshold</key>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Alpha</name>
+ <key>alpha</key>
+ <type>real</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>complex</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>complex</type>
+ </source>
+</block>