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diff --git a/gr-atsc/include/atsc/GrAtscBitTimingLoop.h b/gr-atsc/include/atsc/GrAtscBitTimingLoop.h
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+++ b/gr-atsc/include/atsc/GrAtscBitTimingLoop.h
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+/* -*- c++ -*- */
+/*
+ * Copyright 2002 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 _GRATSCBITTIMINGLOOP_H_
+#define _GRATSCBITTIMINGLOOP_H_
+
+#include <blocks/nco.h>
+#include <VrSigProc.h>
+#include <VrHistoryProc.h>
+#include <VrDecimatingSigProc.h>
+#include <atsc/interleaver_fifo.h>
+#include <filter/single_pole_iir.h>
+#include <filter/mmse_fir_interpolator.h>
+#include <atsc/slicer_agc_impl.h>
+#include <stdio.h>
+#include <atsc/diag_output_impl.h>
+
+
+/*!
+ * \brief ATSC BitTimingLoop
+ *
+ * This class accepts a single real input and produces a single real output
+ */
+
+class GrAtscBitTimingLoop : public VrDecimatingSigProc<float,float> {
+
+ public:
+
+  GrAtscBitTimingLoop ();
+  virtual ~GrAtscBitTimingLoop () { };
+
+  virtual const char *name () { return "GrAtscBitTimingLoop"; }
+
+  virtual int forecast (VrSampleRange output,
+			VrSampleRange inputs[]);
+
+  virtual int work (VrSampleRange output, void *o[],
+		    VrSampleRange inputs[], void *i[]);
+
+  // debug
+  void set_mu (double a_mu) { mu = a_mu; }
+  void set_no_update (bool a_no_update) { debug_no_update = a_no_update; }
+  void set_loop_filter_tap (double tap)  { loop.set_taps (tap); }
+  void set_timing_rate (double rate)     { d_timing_rate = rate; }
+
+ protected:
+
+  typedef float iType;
+  typedef float oType;
+
+  iType produce_sample (const iType *in, unsigned int &index);
+  double filter_error (double e);
+
+  VrSampleIndex				next_input;
+  gr_mmse_fir_interpolator		intr;
+  double				w;		// timing control word
+  double				mu;		// fractional delay
+  iType					last_right;	// last right hand sample
+  gr_single_pole_iir<double,double,double>	loop;
+  bool					debug_no_update;// debug
+
+  double				d_loop_filter_tap;
+  double				d_timing_rate;
+
+#ifdef _BT_DIAG_OUTPUT_
+  FILE					*fp_loop;
+  FILE					*fp_ps;
+#endif
+};
+
+#endif // _GRATSCBITTIMINGLOOP_H_