From f2fa77f61b3d569e475cda12ca683fe419e7bfdd Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 28 Feb 2008 19:40:12 +0000
Subject: Make usrp_fft.py reference scale configurable.
Default is 14390, which is the ADC full scale * CORDIC gain
in the FPGA DDC.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7865 221aa14e-8319-0410-a670-987f0aec2ac5
---
gr-utils/src/python/usrp_fft.py | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
(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 9a9f75fe66..307ad16300 100755
--- a/gr-utils/src/python/usrp_fft.py
+++ b/gr-utils/src/python/usrp_fft.py
@@ -75,6 +75,8 @@ class app_top_block(stdgui2.std_top_block):
help="Enable oscilloscope display")
parser.add_option("", "--avg-alpha", type="eng_float", default=1e-1,
help="Set fftsink averaging factor, default=[%default]")
+ parser.add_option("", "--ref-scale", type="eng_float", default=13490.0,
+ help="Set dBFS=0dB input value, default=[%default]")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
@@ -118,7 +120,7 @@ class app_top_block(stdgui2.std_top_block):
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,
- ref_scale=32768.0, ref_level=0.0, y_divs = 10,
+ ref_scale=options.ref_scale, ref_level=0.0, y_divs = 10,
avg_alpha=options.avg_alpha)
self.connect(self.u, self.scope)
--
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