##################################################
# Gnuradio Python Flow Graph
# Title: USRP FLEX Pager Receiver (Single Channel)
-# Generated: Sat Oct 17 11:46:38 2009
+# Generated: Thu Oct 29 08:04:51 2009
##################################################
+from gnuradio import blks2
from gnuradio import eng_notation
from gnuradio import gr
+from gnuradio import window
from gnuradio.eng_option import eng_option
from gnuradio.gr import firdes
from gnuradio.wxgui import fftsink2
sizer=_offset_sizer,
value=self.offset,
callback=self.set_offset,
- minimum=-10e3,
- maximum=10e3,
+ minimum=-12.5e3,
+ maximum=12.5e3,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
##################################################
# Blocks
##################################################
+ self.blks2_rational_resampler_xxx_0 = blks2.rational_resampler_fff(
+ interpolation=5,
+ decimation=8,
+ taps=([1.0/8.0,]*40),
+ fractional_bw=None,
+ )
self.fm_demod = gr.quadrature_demod_cf(demod_k)
self.gr_freq_xlating_fir_filter_xxx_0 = gr.freq_xlating_fir_filter_ccc(channel_decim, (channel_taps), band_freq-freq+offset, sample_rate)
- self.gr_moving_average_xx_0 = gr.moving_average_ff(8, 1.0/8.0, 4000)
self.usrp_source = grc_usrp.simple_source_c(which=0, side="A", rx_ant="RXA")
self.usrp_source.set_decim_rate(decim)
self.usrp_source.set_frequency(band_freq, verbose=True)
title="Channel Waveform",
sample_rate=channel_rate,
v_scale=8e3,
+ v_offset=0,
t_scale=20.0/channel_rate,
ac_couple=False,
xy_mode=False,
self.wxgui_scopesink2_0_0 = scopesink2.scope_sink_f(
self.displays.GetPage(1).GetWin(),
title="Baseband",
- sample_rate=channel_rate,
+ sample_rate=16e3,
v_scale=1,
- t_scale=40.0/channel_rate,
+ v_offset=0,
+ t_scale=40.0/16e3,
ac_couple=False,
xy_mode=False,
num_inputs=1,
self.connect((self.usrp_source, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_scopesink2_0, 0))
self.connect((self.gr_freq_xlating_fir_filter_xxx_0, 0), (self.fm_demod, 0))
- self.connect((self.fm_demod, 0), (self.gr_moving_average_xx_0, 0))
- self.connect((self.gr_moving_average_xx_0, 0), (self.wxgui_scopesink2_0_0, 0))
+ self.connect((self.blks2_rational_resampler_xxx_0, 0), (self.wxgui_scopesink2_0_0, 0))
+ self.connect((self.fm_demod, 0), (self.blks2_rational_resampler_xxx_0, 0))
def set_config_filename(self, config_filename):
self.config_filename = config_filename
def set_symbol_rate(self, symbol_rate):
self.symbol_rate = symbol_rate
- self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
self.set_passband(2*(self.deviation+self.symbol_rate))
+ self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
def set_saved_channel(self, saved_channel):
self.saved_channel = saved_channel
self.channel_rate = channel_rate
self.wxgui_scopesink2_0.set_sample_rate(self.channel_rate)
self.wxgui_fftsink2_1.set_sample_rate(self.channel_rate)
- self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
self.set_channel_decim(int(self.sample_rate/self.channel_rate))
self.set_demod_k(3*self.channel_rate/(2*math.pi*self.deviation))
self.set_channel_taps(firdes.low_pass(10, self.sample_rate, self.passband/2.0, (self.channel_rate-self.passband)/2.0))
- self.wxgui_scopesink2_0_0.set_sample_rate(self.channel_rate)
+ self.set_ma_ntaps(self.channel_rate/self.symbol_rate)
def set_channel(self, channel):
self.channel = channel