Re: [Discuss-gnuradio] Problem displaying magnitude of a complex signal in a scope sink

[Eric Blossom]

On Mon, Jul 31, 2006 at 06:18:04PM -0400, Louis Girard wrote:
> Hi,
>    I started developing with GNU Radio a couple of weeks ago and have been
> following the list for a while. I must thank Eric, Matt and everyone else for
> all the time they are devoting to this project. Now with my problem...
> 
> I am trying to do something which should be pretty simple. I have started from
> one of the examples provided with GNU Radio. I use the USRP as a source for
> complex data. Then I use gr.complex_to_mag() to get the magnitude of the
> signal. Finally I output it to the scope using scope_sink_f. What I get is a
> single freezed frame on the scope and nothing after. It is probably a stupid
> mistake on my side. The code is in attachment.

Try setting the trigger to Auto in the GUI, or press the "50%" button,
which sets the trigger level to 50% of the observed signal.

> I am using GNU Radio release 2.8 as I don't have access to CVS on the system.
> All the examples work well on my system. I tried the code on a basic and a
> dbsrx daugtherboard.

Should be fine for your application.

> Is there any additional documentation available for gr-wxgui?

Just what's inline in the code.

Eric