RE: [Discuss-gnuradio] How to use the SNR block in the GRC

[intermilan]

hi josh:

Thank you for your last e-mail.I am sorry I did not mention the version of GRC I used,and it is 3.2.2(GNU Radio is 3.3.3).
And I found the probe_function block as you said.I use a scope block to connect to the probe_function block to see the output
of the blcok.I also put the bpsk modulated data input this block,and put the output of the block to a file_sink.

I use the ID of the gr_probe_mpsk_snr block as the parameter Block ID of the probe_function block, then set the parameter
 Function name as the name of the functions in the gr_probe_mpsk_snr block such as signal_mean(), snr().But there is an
error " 'gr_hier_block2_sptr' object has no attribute 'signal_mean' "in the flow graph .Why did it happen? Did I set some parameters wrong?

Can you give me a example flow graph (not the one in the digital-bertfolder)about the gr_probe_mpsk_snr and probe_function?

Thank you

inter

> Date: Thu, 7 Apr 2011 11:33:23 -0500
> From: address@hidden
> To: address@hidden
> Subject: Re: [Discuss-gnuradio] How to use the SNR block in the GRC
>
>
>
> On 04/07/2011 05:18 AM, intermilan wrote:
> >
> > Hi all:
> > I found these is a block gr_probe_mpsk_snr in the grc which is used to measure the snr of the bpsk or qpsk signals. But I
> > do not know how to use this block.In my flow graph, I put the bpsk modulated data input this block,and put the output of the block to a file_sink.
> > But there is nothing in that file.So I hope someone can tell me how to use this block.
> > Thanks in advance.
> > inter
> >
>
>
> I dont know what version your using. But I reworked how the probe blocks
> work since the last release, so here is how it works in the current master:
>
> Attach a probe block to your signal. Notice in the probe block docs,
> that the available functions are listed. Use the function probe block to
> read that function periodically and to write the value into a variable.
>
> To display the result, just use the ID from the function probe in the
> value parameter for the appropriate graphical widget.
>
> -Josh
>
> >
> >
> >
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