From 5ede0e2b1457d7c28ad29c5f2322305621a3b26a Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 28 Feb 2008 19:03:55 +0000
Subject: Added reference scaling to fftsink2. Default behavior is unchanged.
The new parameter 'ref_scale', defaulting to 1.0, represents a 0 dB
y-axis value.
Updated usrp_fft.py to display dBFS by setting ref_scale to 32768.0
and ref_level to 0. This results in the full 100 dB of dynamic range
being displayed.
Updated some gnuradio-examples to use the new parameter.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7863 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-utils/src/python/usrp_fft.py | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
(limited to 'gr-utils/src/python/usrp_fft.py')
diff --git a/gr-utils/src/python/usrp_fft.py b/gr-utils/src/python/usrp_fft.py
index d549dd4e39..30a06911ae 100755
--- a/gr-utils/src/python/usrp_fft.py
+++ b/gr-utils/src/python/usrp_fft.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python
#
-# Copyright 2004,2005,2007 Free Software Foundation, Inc.
+# Copyright 2004,2005,2007,2008 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
@@ -115,7 +115,8 @@ class app_top_block(stdgui2.std_top_block):
elif options.oscilloscope:
self.scope = scopesink2.scope_sink_c(panel, sample_rate=input_rate)
else:
- self.scope = fftsink2.fft_sink_c (panel, fft_size=1024, sample_rate=input_rate, y_divs = 10)
+ self.scope = fftsink2.fft_sink_c (panel, fft_size=1024, sample_rate=input_rate,
+ ref_scale=32768.0, ref_level=0.0, y_divs = 10)
self.connect(self.u, self.scope)
--
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