[Commit-gnuradio] r8670 - gnuradio/branches/developers/cswiger/wip/gr-atsc/src/lib

[cswiger]

Author: cswiger
Date: 2008-06-23 13:21:50 -0600 (Mon, 23 Jun 2008)
New Revision: 8670

Added:
   
gnuradio/branches/developers/cswiger/wip/gr-atsc/src/lib/cpll_btloop_coupling.h
Log:
Removed fpll and added cpll_btloop_coupling.h


Added: 
gnuradio/branches/developers/cswiger/wip/gr-atsc/src/lib/cpll_btloop_coupling.h
===================================================================
--- 
gnuradio/branches/developers/cswiger/wip/gr-atsc/src/lib/cpll_btloop_coupling.h 
                            (rev 0)
+++ 
gnuradio/branches/developers/cswiger/wip/gr-atsc/src/lib/cpll_btloop_coupling.h 
    2008-06-23 19:21:50 UTC (rev 8670)
@@ -0,0 +1,38 @@
+/* -*- 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 _CPLL_BTLOOP_COUPLING_H_
+#define _CPLL_BTLOOP_COUPLING_H_
+
+/*!
+ * Magic coupling constant between GrAtscFPLL and GrAtscBitTimingLoop.
+ * Trust me, you don't want to mess with this.
+ *
+ * The agc block buried in the FPLL indirectly sets the level of the input
+ * to the bit timing loop.  The bit timing loop's convergence properties
+ * depend on the the mean amplitude of it's input.  This constant ties
+ * them together such that you can tweak the input level of the bit timing loop
+ * (somewhat) without screwing everything.
+ */
+
+static const float CPLL_BTLOOP_COUPLING_CONST = 3.125;
+
+#endif /* _CPLL_BTLOOP_COUPLING_H_ */