uhd: cleaning up and updating some script info.

4 files changed, 0 insertions, 1294 deletions

diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py
deleted file mode 100755
index edfbc3657..000000000
--- a/gnuradio-examples/python/usrp/usrp_wfm_rcv2_nogui.py
+++ /dev/null
@@ -1,183 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005,2006,2007 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, gru, eng_notation, optfir
-from gnuradio import audio
-from gnuradio import usrp
-from gnuradio import blks2
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-from usrpm import usrp_dbid
-import sys
-import math
-
-def calc_dxc_freq(target_freq, baseband_freq, fs):
-   dxc_temp = (target_freq - baseband_freq) % fs
-
-   if dxc_temp < fs/2.0:
-       dxc_freq = - dxc_temp
-       inverted = False
-   else:
-       dxc_freq = fs - dxc_temp
-       inverted = True
-
-   return (dxc_freq, inverted)
-
-def pick_subdevice(u):
-    """
-    The user didn't specify a subdevice on the command line.
-    Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A.
-
-    @return a subdev_spec
-    """
-    return usrp.pick_subdev(u, (usrp_dbid.TV_RX,
-                                usrp_dbid.TV_RX_REV_2,
-				usrp_dbid.TV_RX_REV_3,
-				usrp_dbid.TV_RX_MIMO,
-                                usrp_dbid.TV_RX_REV_2_MIMO,
-				usrp_dbid.TV_RX_REV_3_MIMO,
-                                usrp_dbid.BASIC_RX))
-
-
-class wfm_rx_block (gr.top_block):
-
-    def __init__(self):
-        gr.top_block.__init__(self)
-
-        parser=OptionParser(option_class=eng_option)
-        parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
-                          help="select USRP Rx side A or B (default=A)")
-        parser.add_option("", "--f1", type="eng_float", default=100.7e6,
-                          help="set 1st station frequency to FREQ", metavar="FREQ")
-        parser.add_option("", "--f2", type="eng_float", default=102.5e6,
-                          help="set 2nd station freq to FREQ", metavar="FREQ")
-        parser.add_option("-g", "--gain", type="eng_float", default=40,
-                          help="set gain in dB (default is midpoint)")
-        parser.add_option("-O", "--audio-output", type="string", default="",
-                          help="pcm device name.  E.g., hw:0,0 or surround51 or /dev/dsp")
-
-        (options, args) = parser.parse_args()
-        if len(args) != 0:
-            parser.print_help()
-            sys.exit(1)
-        
-        if abs(options.f1) < 1e6:
-            options.f1 *= 1e6
-
-        if abs(options.f2) < 1e6:
-            options.f2 *= 1e6
-
-        if abs(options.f1 - options.f2) > 5.5e6:
-            print "Sorry, two stations must be within 5.5MHz of each other"
-            raise SystemExit
-
-        f = (options.f1, options.f2)
-        
-        self.vol = .1
-        self.state = "FREQ"
-
-        # build graph
-        
-        self.u = usrp.source_c(0, nchan=2)          # usrp is data source
-
-        adc_rate = self.u.adc_rate()                # 64 MS/s
-        usrp_decim = 200
-        self.u.set_decim_rate(usrp_decim)
-        usrp_rate = adc_rate / usrp_decim           # 320 kS/s
-        chanfilt_decim = 1
-        demod_rate = usrp_rate / chanfilt_decim
-        audio_decimation = 10
-        audio_rate = demod_rate / audio_decimation  # 32 kHz
-
-
-        if options.rx_subdev_spec is None:
-            options.rx_subdev_spec = pick_subdevice(self.u)
-
-        mv = usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec)
-        mv |= (mv << 8) & 0xff00   # both DDC inputs setup same way
-        self.u.set_mux(mv)
-        self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
-        print "Using RX d'board %s" % (self.subdev.side_and_name(),)
-
-
-        # deinterleave two channels from FPGA
-        di = gr.deinterleave(gr.sizeof_gr_complex)
-        
-        # wire up the head of the chain
-        self.connect(self.u, di)
-        
-        # sound card as final sink
-        audio_sink = audio.sink(int(audio_rate), options.audio_output)
-
-        # taps for channel filter
-        chan_filt_coeffs = optfir.low_pass (1,           # gain
-                                            usrp_rate,   # sampling rate
-                                            80e3,        # passband cutoff
-                                            115e3,       # stopband cutoff
-                                            0.1,         # passband ripple
-                                            60)          # stopband attenuation
-        #print len(chan_filt_coeffs)
-
-        mid_freq = (f[0] + f[1]) / 2
-        # set front end PLL to middle frequency
-        tune_result = self.subdev.set_freq(mid_freq)
-
-        for n in range(2):
-            chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
-            guts = blks2.wfm_rcv (demod_rate, audio_decimation)
-            volume_control = gr.multiply_const_ff(self.vol)
-            self.connect((di, n), chan_filt)
-            self.connect(chan_filt, guts, volume_control)
-            self.connect(volume_control, (audio_sink, n))
-            dxc_freq, inverted = calc_dxc_freq(f[n], tune_result.baseband_freq,
-                                               self.u.converter_rate())
-            self.u.set_rx_freq(n, dxc_freq)
-        
-
-        if options.gain is None:
-            # if no gain was specified, use the mid-point in dB
-            g = self.subdev.gain_range()
-            options.gain = float(g[0]+g[1])/2
-
-
-        # set initial values
-        self.set_gain(options.gain)
-
-
-    def set_vol (self, vol):
-        self.vol = vol
-        self.volume_control.set_k(self.vol)
-
-
-    def set_gain(self, gain):
-        self.subdev.set_gain(gain)
-
-    def __del__(self):
-	# Avoid weak-reference error
-	del self.subdev
-    
-if __name__ == '__main__':
-    tb = wfm_rx_block()
-    try:
-        tb.run()
-    except KeyboardInterrupt:
-        pass
diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv_fmdet.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv_fmdet.py
deleted file mode 100755
index 30744ee01..000000000
--- a/gnuradio-examples/python/usrp/usrp_wfm_rcv_fmdet.py
+++ /dev/null
@@ -1,354 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005,2006,2007 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, gru, eng_notation, optfir
-from gnuradio import audio
-from gnuradio import usrp
-from gnuradio import blks2
-from gnuradio.eng_option import eng_option
-from gnuradio.wxgui import slider, powermate
-from gnuradio.wxgui import stdgui2, fftsink2, form, scopesink2
-from optparse import OptionParser
-from usrpm import usrp_dbid
-import sys
-import math
-import wx
-
-def pick_subdevice(u):
-    """
-    The user didn't specify a subdevice on the command line.
-    Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A.
-
-    @return a subdev_spec
-    """
-    return usrp.pick_subdev(u, (usrp_dbid.TV_RX,
-                                usrp_dbid.TV_RX_REV_2,
-				usrp_dbid.TV_RX_REV_3,
-				usrp_dbid.TV_RX_MIMO,
-                                usrp_dbid.TV_RX_REV_2_MIMO,
-				usrp_dbid.TV_RX_REV_3_MIMO,
-                                usrp_dbid.BASIC_RX))
-
-class wfm_rx_block (stdgui2.std_top_block):
-    def __init__(self,frame,panel,vbox,argv):
-        stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
-
-        parser=OptionParser(option_class=eng_option)
-        parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
-                          help="select USRP Rx side A or B (default=A)")
-        parser.add_option("-f", "--freq", type="eng_float", default=100.1e6,
-                          help="set frequency to FREQ", metavar="FREQ")
-        parser.add_option("-g", "--gain", type="eng_float", default=65,
-                          help="set gain in dB (default is midpoint)")
-        parser.add_option("-s", "--squelch", type="eng_float", default=0,
-                          help="set squelch level (default is 0)")
-        parser.add_option("-V", "--volume", type="eng_float", default=None,
-                          help="set volume (default is midpoint)")
-        parser.add_option("-O", "--audio-output", type="string", default="",
-                          help="pcm device name.  E.g., hw:0,0 or surround51 or /dev/dsp")
-
-
-        (options, args) = parser.parse_args()
-        if len(args) != 0:
-            parser.print_help()
-            sys.exit(1)
-        
-        self.frame = frame
-        self.panel = panel
-        
-        self.vol = 0
-        self.state = "FREQ"
-        self.freq = 0
-
-        # build graph
-        
-        self.u = usrp.source_c()                    # usrp is data source
-
-        adc_rate = self.u.adc_rate()                # 64 MS/s
-        usrp_decim = 200
-        self.u.set_decim_rate(usrp_decim)
-        usrp_rate = adc_rate / usrp_decim           #  320 kS/s
-        chanfilt_decim = 1
-        demod_rate = usrp_rate / chanfilt_decim
-        audio_decimation = 10
-        audio_rate = 3*demod_rate / audio_decimation/2  # 48 kHz
-
-        if options.rx_subdev_spec is None:
-            options.rx_subdev_spec = pick_subdevice(self.u)
-
-        self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
-        self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
-
-
-        chan_filt_coeffs = gr.firdes.low_pass_2     (1,         # gain
-                                            usrp_rate,   # sampling rate
-                                            90e3,        # passband cutoff
-                                            30e3,        # transition bandwidth
-                                            70,          # stopband attenuation
-                                            gr.firdes.WIN_BLACKMAN)
-        print len(chan_filt_coeffs)
-        chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
-
-        self.rchan_sample = blks2.rational_resampler_fff(3,2)
-        self.lchan_sample = blks2.rational_resampler_fff(3,2)
-
-
-        #self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
-        self.guts = blks2.wfm_rcv_fmdet (demod_rate, audio_decimation)
-
-        # FIXME rework {add,multiply}_const_* to handle multiple streams
-        self.volume_control_l = gr.multiply_const_ff(self.vol)
-        self.volume_control_r = gr.multiply_const_ff(self.vol)
-
-        # sound card as final sink
-        audio_sink = audio.sink (int (audio_rate),
-                                 options.audio_output,
-                                 False)   # ok_to_block
-        
-        # now wire it all together
-        self.connect (self.u, chan_filt, self.guts)
-        self.connect((self.guts, 0), self.lchan_sample,self.volume_control_l,(audio_sink,0))
-        self.connect((self.guts, 1), self.rchan_sample,self.volume_control_r,(audio_sink,1))
-
-        try:
-          self.guts.stereo_carrier_pll_recovery.squelch_enable(True)
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-
-
-        self._build_gui(vbox, usrp_rate, demod_rate, audio_rate)
-
-        if options.gain is None:
-            # if no gain was specified, use the mid-point in dB
-            g = self.subdev.gain_range()
-            options.gain = float(g[0]+g[1])/2
-
-        if options.volume is None:
-            g = self.volume_range()
-            options.volume = float(g[0]+g[1])/2
-
-        if abs(options.freq) < 1e6:
-            options.freq *= 1e6
-
-        # set initial values
-
-        self.set_gain(options.gain)
-        self.set_vol(options.volume)
-        try:
-          self.guts.stereo_carrier_pll_recovery.set_lock_threshold(options.squelch)
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-
-        if not(self.set_freq(options.freq)):
-            self._set_status_msg("Failed to set initial frequency")
-
-
-    def _set_status_msg(self, msg, which=0):
-        self.frame.GetStatusBar().SetStatusText(msg, which)
-
-
-    def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate):
-
-        def _form_set_freq(kv):
-            return self.set_freq(kv['freq'])
-
-
-        if 1:
-            self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP",
-                                               fft_size=512, sample_rate=usrp_rate,
-					       ref_scale=32768.0, ref_level=0, y_divs=12)
-            self.connect (self.u, self.src_fft)
-            vbox.Add (self.src_fft.win, 4, wx.EXPAND)
-
-        if 1:
-            post_fm_demod_fft = fftsink2.fft_sink_f(self.panel, title="Post FM Demod",
-                                                    fft_size=512, sample_rate=demod_rate,
-                                                    y_per_div=10, ref_level=0)
-            self.connect (self.guts.fm_demod, post_fm_demod_fft)
-            vbox.Add (post_fm_demod_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_stereo_carrier_generator_fft = fftsink2.fft_sink_c (self.panel, title="Post Stereo_carrier_generator",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=0)
-            self.connect (self.guts.stereo_carrier_generator, post_stereo_carrier_generator_fft)
-            vbox.Add (post_stereo_carrier_generator_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_deemphasis_left = fftsink2.fft_sink_f (self.panel, title="Post_Deemphasis_Left",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=0)
-            self.connect (self.guts.deemph_Left, post_deemphasis_left)
-            vbox.Add (post_deemphasis_left.win, 4, wx.EXPAND)
-
-        if 0:
-            post_deemphasis_right = fftsink2.fft_sink_f(self.panel, title="Post_Deemphasis_Right",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=-20)
-            self.connect (self.guts.deemph_Left, post_deemphasis_right)
-            vbox.Add (post_deemphasis_right.win, 4, wx.EXPAND)
-
-
-        if 0:
-            LmR_fft = fftsink2.fft_sink_f(self.panel, title="LmR", 
-                                          fft_size=512, sample_rate=audio_rate,
-                                          y_per_div=10, ref_level=-20)
-            self.connect (self.guts.LmR_real,LmR_fft)
-            vbox.Add (LmR_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            self.scope = scopesink2.scope_sink_f(self.panel, sample_rate=demod_rate)
-            self.connect (self.guts.fm_demod,self.scope)
-            vbox.Add (self.scope.win,4,wx.EXPAND)
-        
-        # control area form at bottom
-        self.myform = myform = form.form()
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-        myform['freq'] = form.float_field(
-            parent=self.panel, sizer=hbox, label="Freq", weight=1,
-            callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
-
-        hbox.Add((5,0), 0)
-        myform['freq_slider'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
-                                        range=(87.9e6, 108.1e6, 0.1e6),
-                                        callback=self.set_freq)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-
-        myform['volume'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
-                                        weight=3, range=self.volume_range(),
-                                        callback=self.set_vol)
-        hbox.Add((5,0), 1)
-
-        myform['gain'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
-                                        weight=3, range=self.subdev.gain_range(),
-                                        callback=self.set_gain)
-        hbox.Add((5,0), 0)
-
-        myform['sqlch_thrsh'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Stereo Squelch Threshold",
-                                        weight=3, range=(0.0,1.0,0.01),
-                                        callback=self.set_squelch)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        try:
-            self.knob = powermate.powermate(self.frame)
-            self.rot = 0
-            powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
-            powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
-        except:
-            print "FYI: No Powermate or Contour Knob found"
-
-
-    def on_rotate (self, event):
-        self.rot += event.delta
-        if (self.state == "FREQ"):
-            if self.rot >= 3:
-                self.set_freq(self.freq + .1e6)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_freq(self.freq - .1e6)
-                self.rot += 3
-        else:
-            step = self.volume_range()[2]
-            if self.rot >= 3:
-                self.set_vol(self.vol + step)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_vol(self.vol - step)
-                self.rot += 3
-            
-    def on_button (self, event):
-        if event.value == 0:        # button up
-            return
-        self.rot = 0
-        if self.state == "FREQ":
-            self.state = "VOL"
-        else:
-            self.state = "FREQ"
-        self.update_status_bar ()
-        
-
-    def set_vol (self, vol):
-        g = self.volume_range()
-        self.vol = max(g[0], min(g[1], vol))
-        self.volume_control_l.set_k(10**(self.vol/10))
-        self.volume_control_r.set_k(10**(self.vol/10))
-        self.myform['volume'].set_value(self.vol)
-        self.update_status_bar ()
-
-    def set_squelch(self,squelch_threshold):
-        try:
-          self.guts.stereo_carrier_pll_recovery.set_lock_threshold(squelch_threshold);
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-                                        
-    def set_freq(self, target_freq):
-        """
-        Set the center frequency we're interested in.
-
-        @param target_freq: frequency in Hz
-        @rypte: bool
-
-        Tuning is a two step process.  First we ask the front-end to
-        tune as close to the desired frequency as it can.  Then we use
-        the result of that operation and our target_frequency to
-        determine the value for the digital down converter.
-        """
-        r = usrp.tune(self.u, 0, self.subdev, target_freq)
-        
-        if r:
-            self.freq = target_freq
-            self.myform['freq'].set_value(target_freq)         # update displayed value
-            self.myform['freq_slider'].set_value(target_freq)  # update displayed value
-            self.update_status_bar()
-            self._set_status_msg("OK", 0)
-            return True
-
-        self._set_status_msg("Failed", 0)
-        return False
-
-    def set_gain(self, gain):
-        self.myform['gain'].set_value(gain)     # update displayed value
-        self.subdev.set_gain(gain)
-
-    def update_status_bar (self):
-        msg = "Volume:%r  Setting:%s" % (self.vol, self.state)
-        self._set_status_msg(msg, 1)
-        self.src_fft.set_baseband_freq(self.freq)
-
-    def volume_range(self):
-        return (-20.0, 0.0, 0.5)
-        
-
-if __name__ == '__main__':
-    app = stdgui2.stdapp (wfm_rx_block, "USRP WFM RX")
-    app.MainLoop ()
diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv_pll.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv_pll.py
deleted file mode 100755
index 0d52ed7ee..000000000
--- a/gnuradio-examples/python/usrp/usrp_wfm_rcv_pll.py
+++ /dev/null
@@ -1,354 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005,2006,2007 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, gru, eng_notation, optfir
-from gnuradio import audio
-from gnuradio import usrp
-from gnuradio import blks2
-from gnuradio.eng_option import eng_option
-from gnuradio.wxgui import slider, powermate
-from gnuradio.wxgui import stdgui2, fftsink2, form, scopesink2
-from optparse import OptionParser
-from usrpm import usrp_dbid
-import sys
-import math
-import wx
-
-def pick_subdevice(u):
-    """
-    The user didn't specify a subdevice on the command line.
-    Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A.
-
-    @return a subdev_spec
-    """
-    return usrp.pick_subdev(u, (usrp_dbid.TV_RX,
-                                usrp_dbid.TV_RX_REV_2,
-				usrp_dbid.TV_RX_REV_3,
-				usrp_dbid.TV_RX_MIMO,
-                                usrp_dbid.TV_RX_REV_2_MIMO,
-				usrp_dbid.TV_RX_REV_3_MIMO,
-                                usrp_dbid.BASIC_RX))
-
-class wfm_rx_block (stdgui2.std_top_block):
-    def __init__(self,frame,panel,vbox,argv):
-        stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
-
-        parser=OptionParser(option_class=eng_option)
-        parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
-                          help="select USRP Rx side A or B (default=A)")
-        parser.add_option("-f", "--freq", type="eng_float", default=100.1e6,
-                          help="set frequency to FREQ", metavar="FREQ")
-        parser.add_option("-g", "--gain", type="eng_float", default=65,
-                          help="set gain in dB (default is midpoint)")
-        parser.add_option("-s", "--squelch", type="eng_float", default=0,
-                          help="set squelch level (default is 0)")
-        parser.add_option("-V", "--volume", type="eng_float", default=None,
-                          help="set volume (default is midpoint)")
-        parser.add_option("-O", "--audio-output", type="string", default="",
-                          help="pcm device name.  E.g., hw:0,0 or surround51 or /dev/dsp")
-
-
-        (options, args) = parser.parse_args()
-        if len(args) != 0:
-            parser.print_help()
-            sys.exit(1)
-        
-        self.frame = frame
-        self.panel = panel
-        
-        self.vol = 0
-        self.state = "FREQ"
-        self.freq = 0
-
-        # build graph
-        
-        self.u = usrp.source_c()                    # usrp is data source
-
-        adc_rate = self.u.adc_rate()                # 64 MS/s
-        usrp_decim = 200
-        self.u.set_decim_rate(usrp_decim)
-        usrp_rate = adc_rate / usrp_decim           #  320 kS/s
-        chanfilt_decim = 1
-        demod_rate = usrp_rate / chanfilt_decim
-        audio_decimation = 10
-        audio_rate = 3*demod_rate / audio_decimation/2  # 48 kHz
-
-        if options.rx_subdev_spec is None:
-            options.rx_subdev_spec = pick_subdevice(self.u)
-
-        self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
-        self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
-
-
-        chan_filt_coeffs = gr.firdes.low_pass_2     (1,         # gain
-                                            usrp_rate,   # sampling rate
-                                            90e3,        # passband cutoff
-                                            30e3,        # transition bandwidth
-                                            70,          # stopband attenuation
-                                            gr.firdes.WIN_BLACKMAN)
-        print len(chan_filt_coeffs)
-        chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
-
-        self.rchan_sample = blks2.rational_resampler_fff(3,2)
-        self.lchan_sample = blks2.rational_resampler_fff(3,2)
-
-
-        #self.guts = blks2.wfm_rcv (demod_rate, audio_decimation)
-        self.guts = blks2.wfm_rcv_pll (demod_rate, audio_decimation)
-
-        # FIXME rework {add,multiply}_const_* to handle multiple streams
-        self.volume_control_l = gr.multiply_const_ff(self.vol)
-        self.volume_control_r = gr.multiply_const_ff(self.vol)
-
-        # sound card as final sink
-        audio_sink = audio.sink (int (audio_rate),
-                                 options.audio_output,
-                                 False)   # ok_to_block
-        
-        # now wire it all together
-        self.connect (self.u, chan_filt, self.guts)
-        self.connect((self.guts, 0), self.lchan_sample,self.volume_control_l,(audio_sink,0))
-        self.connect((self.guts, 1), self.rchan_sample,self.volume_control_r,(audio_sink,1))
-
-        try:
-          self.guts.stereo_carrier_pll_recovery.squelch_enable(True)
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-
-
-        self._build_gui(vbox, usrp_rate, demod_rate, audio_rate)
-
-        if options.gain is None:
-            # if no gain was specified, use the mid-point in dB
-            g = self.subdev.gain_range()
-            options.gain = float(g[0]+g[1])/2
-
-        if options.volume is None:
-            g = self.volume_range()
-            options.volume = float(g[0]+g[1])/2
-
-        if abs(options.freq) < 1e6:
-            options.freq *= 1e6
-
-        # set initial values
-
-        self.set_gain(options.gain)
-        self.set_vol(options.volume)
-        try:
-          self.guts.stereo_carrier_pll_recovery.set_lock_threshold(options.squelch)
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-
-        if not(self.set_freq(options.freq)):
-            self._set_status_msg("Failed to set initial frequency")
-
-
-    def _set_status_msg(self, msg, which=0):
-        self.frame.GetStatusBar().SetStatusText(msg, which)
-
-
-    def _build_gui(self, vbox, usrp_rate, demod_rate, audio_rate):
-
-        def _form_set_freq(kv):
-            return self.set_freq(kv['freq'])
-
-
-        if 1:
-            self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP",
-                                               fft_size=512, sample_rate=usrp_rate,
-					       ref_scale=32768.0, ref_level=0, y_divs=12)
-            self.connect (self.u, self.src_fft)
-            vbox.Add (self.src_fft.win, 4, wx.EXPAND)
-
-        if 1:
-            post_fm_demod_fft = fftsink2.fft_sink_f(self.panel, title="Post FM Demod",
-                                                    fft_size=512, sample_rate=demod_rate,
-                                                    y_per_div=10, ref_level=0)
-            self.connect (self.guts.fm_demod, post_fm_demod_fft)
-            vbox.Add (post_fm_demod_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_stereo_carrier_generator_fft = fftsink2.fft_sink_c (self.panel, title="Post Stereo_carrier_generator",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=0)
-            self.connect (self.guts.stereo_carrier_generator, post_stereo_carrier_generator_fft)
-            vbox.Add (post_stereo_carrier_generator_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_deemphasis_left = fftsink2.fft_sink_f (self.panel, title="Post_Deemphasis_Left",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=0)
-            self.connect (self.guts.deemph_Left, post_deemphasis_left)
-            vbox.Add (post_deemphasis_left.win, 4, wx.EXPAND)
-
-        if 0:
-            post_deemphasis_right = fftsink2.fft_sink_f(self.panel, title="Post_Deemphasis_Right",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=-20)
-            self.connect (self.guts.deemph_Left, post_deemphasis_right)
-            vbox.Add (post_deemphasis_right.win, 4, wx.EXPAND)
-
-
-        if 0:
-            LmR_fft = fftsink2.fft_sink_f(self.panel, title="LmR", 
-                                          fft_size=512, sample_rate=audio_rate,
-                                          y_per_div=10, ref_level=-20)
-            self.connect (self.guts.LmR_real,LmR_fft)
-            vbox.Add (LmR_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            self.scope = scopesink2.scope_sink_f(self.panel, sample_rate=demod_rate)
-            self.connect (self.guts.fm_demod,self.scope)
-            vbox.Add (self.scope.win,4,wx.EXPAND)
-        
-        # control area form at bottom
-        self.myform = myform = form.form()
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-        myform['freq'] = form.float_field(
-            parent=self.panel, sizer=hbox, label="Freq", weight=1,
-            callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
-
-        hbox.Add((5,0), 0)
-        myform['freq_slider'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
-                                        range=(87.9e6, 108.1e6, 0.1e6),
-                                        callback=self.set_freq)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-
-        myform['volume'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
-                                        weight=3, range=self.volume_range(),
-                                        callback=self.set_vol)
-        hbox.Add((5,0), 1)
-
-        myform['gain'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
-                                        weight=3, range=self.subdev.gain_range(),
-                                        callback=self.set_gain)
-        hbox.Add((5,0), 0)
-
-        myform['sqlch_thrsh'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Stereo Squelch Threshold",
-                                        weight=3, range=(0.0,1.0,0.01),
-                                        callback=self.set_squelch)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        try:
-            self.knob = powermate.powermate(self.frame)
-            self.rot = 0
-            powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
-            powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
-        except:
-            print "FYI: No Powermate or Contour Knob found"
-
-
-    def on_rotate (self, event):
-        self.rot += event.delta
-        if (self.state == "FREQ"):
-            if self.rot >= 3:
-                self.set_freq(self.freq + .1e6)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_freq(self.freq - .1e6)
-                self.rot += 3
-        else:
-            step = self.volume_range()[2]
-            if self.rot >= 3:
-                self.set_vol(self.vol + step)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_vol(self.vol - step)
-                self.rot += 3
-            
-    def on_button (self, event):
-        if event.value == 0:        # button up
-            return
-        self.rot = 0
-        if self.state == "FREQ":
-            self.state = "VOL"
-        else:
-            self.state = "FREQ"
-        self.update_status_bar ()
-        
-
-    def set_vol (self, vol):
-        g = self.volume_range()
-        self.vol = max(g[0], min(g[1], vol))
-        self.volume_control_l.set_k(10**(self.vol/10))
-        self.volume_control_r.set_k(10**(self.vol/10))
-        self.myform['volume'].set_value(self.vol)
-        self.update_status_bar ()
-
-    def set_squelch(self,squelch_threshold):
-        try:
-          self.guts.stereo_carrier_pll_recovery.set_lock_threshold(squelch_threshold);
-        except:
-          print "FYI: This implementation of the stereo_carrier_pll_recovery has no squelch implementation yet"
-                                        
-    def set_freq(self, target_freq):
-        """
-        Set the center frequency we're interested in.
-
-        @param target_freq: frequency in Hz
-        @rypte: bool
-
-        Tuning is a two step process.  First we ask the front-end to
-        tune as close to the desired frequency as it can.  Then we use
-        the result of that operation and our target_frequency to
-        determine the value for the digital down converter.
-        """
-        r = usrp.tune(self.u, 0, self.subdev, target_freq)
-        
-        if r:
-            self.freq = target_freq
-            self.myform['freq'].set_value(target_freq)         # update displayed value
-            self.myform['freq_slider'].set_value(target_freq)  # update displayed value
-            self.update_status_bar()
-            self._set_status_msg("OK", 0)
-            return True
-
-        self._set_status_msg("Failed", 0)
-        return False
-
-    def set_gain(self, gain):
-        self.myform['gain'].set_value(gain)     # update displayed value
-        self.subdev.set_gain(gain)
-
-    def update_status_bar (self):
-        msg = "Volume:%r  Setting:%s" % (self.vol, self.state)
-        self._set_status_msg(msg, 1)
-        self.src_fft.set_baseband_freq(self.freq)
-
-    def volume_range(self):
-        return (-20.0, 0.0, 0.5)
-        
-
-if __name__ == '__main__':
-    app = stdgui2.stdapp (wfm_rx_block, "USRP WFM RX")
-    app.MainLoop ()
diff --git a/gnuradio-examples/python/usrp/usrp_wfm_rcv_sca.py b/gnuradio-examples/python/usrp/usrp_wfm_rcv_sca.py
deleted file mode 100755
index 39547b3ae..000000000
--- a/gnuradio-examples/python/usrp/usrp_wfm_rcv_sca.py
+++ /dev/null
@@ -1,403 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006,2007 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 this program; if not, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-#
-
-"""
-Here is a bit of code that will receive SCA analog subcarriers of FM
-Broadcast Stations using the USRP.  It is a modified version of
-usrp_wfm_rcv.py.
-
-Common SCA frequencies are 67 kHz and 92 kHz.  SCA is used for Reading
-Services for the Blind, Background Music, Foreign Language Services, and
-other services.  Remember you may hear static when tuned to a FM station
-because this code only outputs SCA audio.
-
-The USRP gain is critical for good decoding.  Adjust for minimum noise.
- I use the Post FM Demod FFT to check for SCA subcarriers and to adjust
-the USRP gain for the lowest noise floor.  The stereo pilot at 19 KHz,
-the stereo difference signal around 38 KHz, and RDS at 57 KHz are also
-displayed on the Post FM Demod FFT if present.
-
-The range below 67 kHz is used for SCA only when Stereo is not used.
-
-The SCA recieve range is not as far as the main FM carrier receive range
-so tune in strong local stations first.
-
-I tried to comment the code with the various parameters.  There seems to
-be several choices for a couple of them.  I coded the common ones I see
-here.
-
-In the local area there are a couple of stations using digital SCA.
-These look similar to narrow DRM signals and I wonder if they are using
-OFDM.
-"""
-
-
-from gnuradio import gr, gru, eng_notation, optfir
-from gnuradio import audio
-from gnuradio import usrp
-from gnuradio.blks2impl.fm_emph import fm_deemph
-from gnuradio.eng_option import eng_option
-from gnuradio.wxgui import slider, powermate
-from gnuradio.wxgui import stdgui2, fftsink2, form
-from optparse import OptionParser
-from usrpm import usrp_dbid
-import sys
-import math
-import wx
-
-def pick_subdevice(u):
-    """
-    The user didn't specify a subdevice on the command line.
-    Try for one of these, in order: TV_RX, BASIC_RX, whatever is on side A.
-
-    @return a subdev_spec
-    """
-    return usrp.pick_subdev(u, (usrp_dbid.TV_RX,
-                                usrp_dbid.TV_RX_REV_2,
-				usrp_dbid.TV_RX_REV_3,
-				usrp_dbid.TV_RX_MIMO,
-                                usrp_dbid.TV_RX_REV_2_MIMO,
-				usrp_dbid.TV_RX_REV_3_MIMO,
-                                usrp_dbid.BASIC_RX))
-
-
-class wfm_rx_sca_block (stdgui2.std_top_block):
-    def __init__(self,frame,panel,vbox,argv):
-        stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv)
-
-        parser=OptionParser(option_class=eng_option)
-        parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
-                          help="select USRP Rx side A or B (default=A)")
-        parser.add_option("-f", "--freq", type="eng_float", default=100.1e6,
-                          help="set frequency to FREQ", metavar="FREQ")
-        parser.add_option("-g", "--gain", type="eng_float", default=40,
-                          help="set gain in dB (default is midpoint)")
-        parser.add_option("-V", "--volume", type="eng_float", default=None,
-                          help="set volume (default is midpoint)")
-        parser.add_option("-O", "--audio-output", type="string", default="",
-                          help="pcm device name.  E.g., hw:0,0 or surround51 or /dev/dsp")
-
-        (options, args) = parser.parse_args()
-        if len(args) != 0:
-            parser.print_help()
-            sys.exit(1)
-
-        self.frame = frame
-        self.panel = panel
-
-        self.vol = 0
-        self.state = "FREQ"
-        self.freq = 0
-
-        # build graph
-
-        self.u = usrp.source_c()                    # usrp is data source
-
-        adc_rate = self.u.adc_rate()                # 64 MS/s
-        usrp_decim = 200
-        self.u.set_decim_rate(usrp_decim)
-        usrp_rate = adc_rate / usrp_decim           # 320 kS/s
-        chanfilt_decim = 1
-        demod_rate = usrp_rate / chanfilt_decim
-        sca_chanfilt_decim = 5
-        sca_demod_rate = demod_rate / sca_chanfilt_decim  #64 kHz
-        audio_decimation = 2
-        audio_rate = sca_demod_rate / audio_decimation  # 32 kHz
-
-        if options.rx_subdev_spec is None:
-            options.rx_subdev_spec = pick_subdevice(self.u)
-
-        self.u.set_mux(usrp.determine_rx_mux_value(self.u, options.rx_subdev_spec))
-        self.subdev = usrp.selected_subdev(self.u, options.rx_subdev_spec)
-        print "Using RX d'board %s" % (self.subdev.side_and_name(),)
-
-        #Create filter to get main FM Channel we want
-        chan_filt_coeffs = optfir.low_pass (1,           # gain
-                                            usrp_rate,   # sampling rate
-                                            100e3,        # passband cutoff
-                                            140e3,       # stopband cutoff
-                                            0.1,         # passband ripple
-                                            60)          # stopband attenuation
-        #print len(chan_filt_coeffs)
-        chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
-
-        #Create demodulator block for Main FM Channel
-	max_dev = 75e3
-        fm_demod_gain = demod_rate/(2*math.pi*max_dev)
-        self.fm_demod = gr.quadrature_demod_cf (fm_demod_gain)
-
-        # Note - deemphasis is not applied to the Main FM Channel as main audio is not decoded
-
-        # SCA Devation is 10% of carrier but some references say 20% if mono with one SCA (6 KHz seems typical)
-        max_sca_dev = 6e3
-
-	# Create filter to get SCA channel we want
-        sca_chan_coeffs = gr.firdes.low_pass (1.0,                # gain
-                                          demod_rate,       # sampling rate
-                                          max_sca_dev,      # low pass cutoff freq
-                                          max_sca_dev/3,    # width of trans. band
-                                          gr.firdes.WIN_HANN) # filter type
-
-        self.ddc = gr.freq_xlating_fir_filter_fcf(sca_chanfilt_decim,       # decimation rate
-                                                  sca_chan_coeffs,    # taps
-                                                  0,              # frequency translation amount (Gets set by the UI)
-                                                  demod_rate)   # input sample rate
-
-        #Create demodulator block for SCA Channel
-        sca_demod_gain = sca_demod_rate/(2*math.pi*max_sca_dev)
-        self.fm_demod_sca = gr.quadrature_demod_cf (sca_demod_gain)
-
-
-        # SCA analog audio is bandwidth limited to 5 KHz
-        max_sca_audio_freq = 5.0e3
-        # SCA analog deephasis is 150 uS (75 uS may be used)
-        sca_tau = 150e-6
-
-        # compute FIR filter taps for SCA audio filter
-        audio_coeffs = gr.firdes.low_pass (1.0,         # gain
-                                           sca_demod_rate,      # sampling rate
-                                           max_sca_audio_freq, # low pass cutoff freq
-                                           max_sca_audio_freq/2.5,             # width of trans. band
-                                           gr.firdes.WIN_HAMMING)
-
-        # input: float; output: float
-        self.audio_filter = gr.fir_filter_fff (audio_decimation, audio_coeffs)
-
-	# Create deemphasis block that is applied after SCA demodulation
-        self.deemph = fm_deemph (audio_rate, sca_tau)
-
-        self.volume_control = gr.multiply_const_ff(self.vol)
-
-        # sound card as final sink
-        audio_sink = audio.sink (int (audio_rate),
-                                 options.audio_output,
-                                 False)  # ok_to_block
-
-        # now wire it all together
-        self.connect (self.u, chan_filt, self.fm_demod, self.ddc, self.fm_demod_sca)
-        self.connect (self.fm_demod_sca, self.audio_filter, self.deemph, self.volume_control, audio_sink)
-
-        self._build_gui(vbox, usrp_rate, demod_rate, sca_demod_rate, audio_rate)
-
-        if options.gain is None:
-            # if no gain was specified, use the mid-point in dB
-            g = self.subdev.gain_range()
-            options.gain = float(g[0]+g[1])/2
-
-        if options.volume is None:
-            g = self.volume_range()
-            options.volume = float(g[0]+g[1])/2
-
-        if abs(options.freq) < 1e6:
-            options.freq *= 1e6
-
-        # set initial values
-
-        self.set_gain(options.gain)
-        self.set_vol(options.volume)
-        if not(self.set_freq(options.freq)):
-            self._set_status_msg("Failed to set initial frequency")
-        self.set_sca_freq(67000)  # A common SCA Frequency
-
-
-    def _set_status_msg(self, msg, which=0):
-        self.frame.GetStatusBar().SetStatusText(msg, which)
-
-
-    def _build_gui(self, vbox, usrp_rate, demod_rate, sca_demod_rate, audio_rate):
-
-        def _form_set_freq(kv):
-            return self.set_freq(kv['freq'])
-
-        def _form_set_sca_freq(kv):
-            return self.set_sca_freq(kv['sca_freq'])
-
-        if 1:
-            self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP",
-                                               fft_size=512, sample_rate=usrp_rate,
-					       ref_scale=32768.0, ref_level=0, y_divs=12)
-            self.connect (self.u, self.src_fft)
-            vbox.Add (self.src_fft.win, 4, wx.EXPAND)
-
-        if 1:
-            post_demod_fft = fftsink2.fft_sink_f(self.panel, title="Post FM Demod",
-                                                 fft_size=2048, sample_rate=demod_rate,
-                                                 y_per_div=10, ref_level=0)
-            self.connect (self.fm_demod, post_demod_fft)
-            vbox.Add (post_demod_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_demod_sca_fft = fftsink2.fft_sink_f(self.panel, title="Post SCA Demod",
-                                                fft_size=1024, sample_rate=sca_demod_rate,
-                                                y_per_div=10, ref_level=0)
-            self.connect (self.fm_demod_sca, post_demod_sca_fft)
-            vbox.Add (post_demod_sca_fft.win, 4, wx.EXPAND)
-
-        if 0:
-            post_deemph_fft = fftsink2.fft_sink_f (self.panel, title="Post SCA Deemph",
-                                                  fft_size=512, sample_rate=audio_rate,
-                                                  y_per_div=10, ref_level=-20)
-            self.connect (self.deemph, post_deemph_fft)
-            vbox.Add (post_deemph_fft.win, 4, wx.EXPAND)
-
-
-        # control area form at bottom
-        self.myform = myform = form.form()
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-        myform['freq'] = form.float_field(
-            parent=self.panel, sizer=hbox, label="Freq", weight=1,
-            callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg))
-
-        hbox.Add((5,0), 0)
-        myform['freq_slider'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
-                                        range=(87.9e6, 108.1e6, 0.1e6),
-                                        callback=self.set_freq)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-        myform['sca_freq'] = form.float_field(
-            parent=self.panel, sizer=hbox, label="SCA", weight=1,
-            callback=myform.check_input_and_call(_form_set_sca_freq, self._set_status_msg))
-
-        hbox.Add((5,0), 0)
-        myform['sca_freq_slider'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3,
-                                        range=(38e3, 100e3, 1.0e3),
-                                        callback=self.set_sca_freq)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        hbox = wx.BoxSizer(wx.HORIZONTAL)
-        hbox.Add((5,0), 0)
-
-        myform['volume'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume",
-                                        weight=3, range=self.volume_range(),
-                                        callback=self.set_vol)
-        hbox.Add((5,0), 1)
-
-        myform['gain'] = \
-            form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain",
-                                        weight=3, range=self.subdev.gain_range(),
-                                        callback=self.set_gain)
-        hbox.Add((5,0), 0)
-        vbox.Add(hbox, 0, wx.EXPAND)
-
-        try:
-            self.knob = powermate.powermate(self.frame)
-            self.rot = 0
-            powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate)
-            powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button)
-        except:
-            print "FYI: No Powermate or Contour Knob found"
-
-
-    def on_rotate (self, event):
-        self.rot += event.delta
-        if (self.state == "FREQ"):
-            if self.rot >= 3:
-                self.set_freq(self.freq + .1e6)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_freq(self.freq - .1e6)
-                self.rot += 3
-        else:
-            step = self.volume_range()[2]
-            if self.rot >= 3:
-                self.set_vol(self.vol + step)
-                self.rot -= 3
-            elif self.rot <=-3:
-                self.set_vol(self.vol - step)
-                self.rot += 3
-
-    def on_button (self, event):
-        if event.value == 0:        # button up
-            return
-        self.rot = 0
-        if self.state == "FREQ":
-            self.state = "VOL"
-        else:
-            self.state = "FREQ"
-        self.update_status_bar ()
-
-
-    def set_vol (self, vol):
-        g = self.volume_range()
-        self.vol = max(g[0], min(g[1], vol))
-        self.volume_control.set_k(10**(self.vol/10))
-        self.myform['volume'].set_value(self.vol)
-        self.update_status_bar ()
-
-    def set_freq(self, target_freq):
-        """
-        Set the center frequency we're interested in.
-
-        @param target_freq: frequency in Hz
-        @rypte: bool
-
-        Tuning is a two step process.  First we ask the front-end to
-        tune as close to the desired frequency as it can.  Then we use
-        the result of that operation and our target_frequency to
-        determine the value for the digital down converter.
-        """
-        r = usrp.tune(self.u, 0, self.subdev, target_freq)
-
-        if r:
-            self.freq = target_freq
-            self.myform['freq'].set_value(target_freq)         # update displayed value
-            self.myform['freq_slider'].set_value(target_freq)  # update displayed value
-            self.update_status_bar()
-            self._set_status_msg("OK", 0)
-            return True
-
-        self._set_status_msg("Failed", 0)
-        return False
-
-    def set_sca_freq(self, target_sca_freq):
-
-        self.ddc.set_center_freq(-target_sca_freq)
-        self.myform['sca_freq'].set_value(target_sca_freq)         # update displayed value
-        self.myform['sca_freq_slider'].set_value(target_sca_freq)  # update displayed value
-        self.update_status_bar()
-        self._set_status_msg("OK", 0)
-        return True
-
-    def set_gain(self, gain):
-        self.myform['gain'].set_value(gain)     # update displayed value
-        self.subdev.set_gain(gain)
-
-    def update_status_bar (self):
-        msg = "Volume:%r  Setting:%s" % (self.vol, self.state)
-        self._set_status_msg(msg, 1)
-        self.src_fft.set_baseband_freq(self.freq)
-
-    def volume_range(self):
-        return (-20.0, 0.0, 0.5)
-
-
-if __name__ == '__main__':
-    app = stdgui2.stdapp (wfm_rx_sca_block, "USRP WFM SCA RX")
-    app.MainLoop ()