Re: [Discuss-gnuradio] eye diagram error

[Richard Bell]

Dan,

You can turn persistence on!? I use qt widgets, I don't see that option in the Time Sink. Is this a WX only option?

v/r,
Rich

On Thu, Feb 19, 2015 at 12:36 PM, Dan CaJacob <address@hidden> wrote:

I'll add one thing to Marcus' recommendation: turn on persistence in the scope widget.  Then you've got a great eye-diagram!

Very Respectfully,

Dan CaJacob

On Thu, Feb 19, 2015 at 4:33 AM, Marcus Müller <address@hidden> wrote:

Hi Mostafa,

yep, these are not GNU Radio core visualizations, but come with gr-baz. You might be using a GNU Radio 3.6-compatible version of gr-baz instead of one that works with GR 3.7. Make sure to install the master branch of github.com/balint256/gr-baz , after removing all remnants of the gr-baz version that you have.

My hint regarding the eye diagram was just to build an eye diagram like it's in the books [1]: An oscilloscope that is triggered on the symbol rate.

Best regards,
Marcus

[1]http://en.wikipedia.org/wiki/Eye_pattern

On 02/19/2015 07:35 AM, Mostafa Alizadeh wrote:

Hi Marcus, 

I'm using GNURadio 3.7.5.1. Under [Graphical Sinks], I have "Baudline Sink" , "Fast AutoCorrelation Sink" and also "Eye diagram". It doesn't work!

I didn't get your hint of creating an eye diagram :(

Best, 

Mostafa

On Tue, Feb 17, 2015 at 9:39 PM, Marcus Müller <address@hidden> wrote:

Hi Mostafa,

which GNU Radio version are you using?
GNU Radio itself (to my knowledge) doesn't come with a dedicated eye diagram, and it's possible that you're trying to use an out-of-tree module that was meant for another version of GNU Radio.
You can try to emulate an eye diagram by using the Scope Sink, and triggering on a signal that has an edge on every symbol center.

Best regards,
Marcus

On 02/17/2015 06:30 PM, Mostafa Alizadeh wrote:

Hello, 

When I used eye diagram block (which seems to be a member of WxGUI class), the following error appeared:

  File "/usr/local/lib/python2.7/dist-packages/baz/eye.py", line 98, in __init__

    self.st = gr.message_sink(gr.sizeof_float, msgq, dont_block=1)

AttributeError: 'module' object has no attribute 'message_sink' 

what is the main problem? 

best, 

Mostafa

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