GUI to display transmitted signal

GNU Radio
1

I am transmitting a signal from my USRP N210, but I would like to also
see
that signal on screen in a gui. I’m currently getting an error that I
don’t
understand. I have a simple class, tx_test(gr.heir_block2), that simply
transmits a sine wave.

The second class, tx_sink(stdgui2.std_to_block), has the following
things:
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 .....adds some options....
    (options, args) = parser.parse_args ()
    self.u = uhd.usrp_sink(device_addr=options.args,

stream_args=uhd.stream_args(‘fc32’))
It goes on to set sample rates and such. Lastly I have:
sig0 = tx_test(options.samp_rate)
self.connect(sig0, self.u)

     gui = fftsink2.fft_sink_c(panel, title="Tx FFT Plot",
                                         fft_size=1024,

sample_rate=self.usrp_rate)
self.connect (sig0, gui)
vbox.Add (gui.win, 1, wx.EXPAND)

def main ():
app = stdgui2.stdapp(tx_sink, “Transmitted Signal”, nstatus=1)
app.MainLoop ()

if name == ‘main’:
main ()

I get the following error:
File “tx_test_gui.py”, line 47, in tx_sink
self.u = uhd.usrp_sink(device_addr=options.args,
stream_args=uhd.stream_args(‘fc32’))
NameError: name ‘self’ is not defined

2

On Wed, Feb 20, 2013 at 1:39 PM, Brooke H. [email protected]
wrote:

    parser.add_option .....adds some options....

sample_rate=self.usrp_rate)
I get the following error:
File “tx_test_gui.py”, line 47, in tx_sink
self.u = uhd.usrp_sink(device_addr=options.args,
stream_args=uhd.stream_args(‘fc32’))
NameError: name ‘self’ is not defined

My first guess to this is incorrect whitespace. Make sure your “def
init” function is properly set under the class name and there’s no
odd
spacing anywhere else (or that you have both tabs and spaces that are
confusing the parser).

Tom