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diff --git a/gr-analog/grc/analog_ctcss_squelch_ff.xml b/gr-analog/grc/analog_ctcss_squelch_ff.xml
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+<?xml version="1.0"?>
+<!--
+#
+# Copyright 2011 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+-->
+
+<!--
+###################################################
+##CTCSS Squelch
+###################################################
+ -->
+<block>
+ <name>CTCSS Squelch</name>
+ <key>analog_ctcss_squelch_ff</key>
+ <import>from gnuradio import analog</import>
+ <make>analog.ctcss_squelch_ff($rate, $freq, $level, $len, $ramp, $gate)</make>
+ <callback>set_level($level)</callback>
+ <param>
+ <name>Sampling Rate (Hz)</name>
+ <key>rate</key>
+ <value>samp_rate</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Tone Frequency</name>
+ <key>freq</key>
+ <value>100.0</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Level</name>
+ <key>level</key>
+ <value>0.01</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Length</name>
+ <key>len</key>
+ <value>0</value>
+ <type>int</type>
+ </param>
+ <param>
+ <name>Ramp</name>
+ <key>ramp</key>
+ <value>0</value>
+ <type>int</type>
+ </param>
+ <param>
+ <name>Gate</name>
+ <key>gate</key>
+ <value>False</value>
+ <type>bool</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>float</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>float</type>
+ </source>
+</block>