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| author | jcorgan | 2008-02-28 19:03:55 +0000 |
|---|---|---|
| committer | jcorgan | 2008-02-28 19:03:55 +0000 |
| commit | 5ede0e2b1457d7c28ad29c5f2322305621a3b26a (patch) | |
| tree | 37301199a3a33780186b147ea304caa63eca6173 /gr-wxgui/src/python | |
| parent | 2869e85809d37ab4a2c01a18c4b348f7f28ee9b0 (diff) | |
| download | gnuradio-5ede0e2b1457d7c28ad29c5f2322305621a3b26a.tar.gz gnuradio-5ede0e2b1457d7c28ad29c5f2322305621a3b26a.tar.bz2 gnuradio-5ede0e2b1457d7c28ad29c5f2322305621a3b26a.zip | |
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
Diffstat (limited to 'gr-wxgui/src/python')
| -rwxr-xr-x | gr-wxgui/src/python/fftsink2.py | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/gr-wxgui/src/python/fftsink2.py b/gr-wxgui/src/python/fftsink2.py index 70ec002e9..b9e1a47f3 100755 --- a/gr-wxgui/src/python/fftsink2.py +++ b/gr-wxgui/src/python/fftsink2.py @@ -91,7 +91,7 @@ class fft_sink_base(object): class fft_sink_f(gr.hier_block2, fft_sink_base): - def __init__(self, parent, baseband_freq=0, + def __init__(self, parent, baseband_freq=0, ref_scale=1.0, y_per_div=10, y_divs=8, ref_level=50, sample_rate=1, fft_size=512, fft_rate=default_fft_rate, average=False, avg_alpha=None, title='', size=default_fftsink_size, peak_hold=False): @@ -122,7 +122,10 @@ class fft_sink_f(gr.hier_block2, fft_sink_base): # FIXME We need to add 3dB to all bins but the DC bin self.log = gr.nlog10_ff(20, self.fft_size, - -20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size)) + -20*math.log10(self.fft_size) # Adjust for number of bins + -10*math.log10(power/self.fft_size) # Adjust for windowing loss + -20*math.log10(ref_scale)) # Adjust for reference scale + self.sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True) self.connect(self, self.s2p, self.one_in_n, self.fft, self.c2mag, self.avg, self.log, self.sink) @@ -131,7 +134,7 @@ class fft_sink_f(gr.hier_block2, fft_sink_base): class fft_sink_c(gr.hier_block2, fft_sink_base): - def __init__(self, parent, baseband_freq=0, + def __init__(self, parent, baseband_freq=0, ref_scale=1.0, y_per_div=10, y_divs=8, ref_level=50, sample_rate=1, fft_size=512, fft_rate=default_fft_rate, average=False, avg_alpha=None, title='', size=default_fftsink_size, peak_hold=False): @@ -162,7 +165,10 @@ class fft_sink_c(gr.hier_block2, fft_sink_base): # FIXME We need to add 3dB to all bins but the DC bin self.log = gr.nlog10_ff(20, self.fft_size, - -20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size)) + -20*math.log10(self.fft_size) # Adjust for number of bins + -10*math.log10(power/self.fft_size) # Adjust for windowing loss + -20*math.log10(ref_scale)) # Adjust for reference scale + self.sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True) self.connect(self, self.s2p, self.one_in_n, self.fft, self.c2mag, self.avg, self.log, self.sink) |