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diff --git a/gr-analog/lib/pll_carriertracking_cc_impl.h b/gr-analog/lib/pll_carriertracking_cc_impl.h
new file mode 100644
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+++ b/gr-analog/lib/pll_carriertracking_cc_impl.h
@@ -0,0 +1,76 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2006,2011,2012 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.
+ */
+
+#ifndef INCLUDED_ANALOG_PLL_CARRIERTRACKING_CC_IMPL_H
+#define INCLUDED_ANALOG_PLL_CARRIERTRACKING_CC_IMPL_H
+
+#include <analog/pll_carriertracking_cc.h>
+#include <gri_control_loop.h>
+
+namespace gr {
+  namespace analog {
+    
+    class pll_carriertracking_cc_impl
+      : public pll_carriertracking_cc, public gri_control_loop
+    {
+    private:
+      float d_locksig,d_lock_threshold;
+      bool d_squelch_enable;
+
+      float mod_2pi(float in);
+      float phase_detector(gr_complex sample,float ref_phase);
+
+    public:
+      pll_carriertracking_cc_impl(float loop_bw, float max_freq, float min_freq);
+      ~pll_carriertracking_cc_impl();
+
+      bool lock_detector(void);
+      bool squelch_enable(bool);
+      float set_lock_threshold(float);
+
+      void set_loop_bandwidth(float bw);
+      void set_damping_factor(float df);
+      void set_alpha(float alpha);
+      void set_beta(float beta);
+      void set_frequency(float freq);
+      void set_phase(float phase);
+      void set_min_freq(float freq);
+      void set_max_freq(float freq);
+
+      float get_loop_bandwidth() const;
+      float get_damping_factor() const;
+      float get_alpha() const;
+      float get_beta() const;
+      float get_frequency() const;
+      float get_phase() const;
+      float get_min_freq() const;
+      float get_max_freq() const;
+
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace analog */
+} /* namespace gr */
+
+#endif /* INCLUDED_ANALOG_PLL_CARRIERTRACKING_CC_IMPL_H */