1 files changed, 63 insertions, 0 deletions
diff --git a/gr-analog/python/qa_quadrature_demod.py b/gr-analog/python/qa_quadrature_demod.py
new file mode 100755
index 000000000..e38ea72a7
--- /dev/null
+++ b/gr-analog/python/qa_quadrature_demod.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+#
+# Copyright 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.
+#
+
+from gnuradio import gr, gr_unittest
+import analog_swig as analog
+import cmath
+
+class test_quadrature_demod(gr_unittest.TestCase):
+
+    def setUp(self):
+        self.tb = gr.top_block()
+
+    def tearDown(self):
+        self.tb = None
+
+    def test_quad_demod_001(self):
+        f = 1000.0
+        fs = 8000.0
+
+        src_data = []
+        for i in xrange(200):
+            ti = i/fs
+            src_data.append(cmath.exp(2j*cmath.pi*f*ti))
+
+        # f/fs is a quarter turn per sample.
+        # Set the gain based on this to get 1 out.
+        gain = 1.0/(cmath.pi/4)
+
+        expected_result = [0,] + 199*[1.0]
+
+        src = gr.vector_source_c(src_data)
+        op = analog.quadrature_demod_cf(gain)
+        dst = gr.vector_sink_f()
+        
+        self.tb.connect(src, op)
+        self.tb.connect(op, dst)
+        self.tb.run()
+        
+        result_data = dst.data()
+        self.assertComplexTuplesAlmostEqual(expected_result, result_data, 5)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_quadrature_demod, "test_quadrature_demod.xml")
+