Editing QT GUI Bercurve Sink

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The Bercurve Sink block creates a plot of Bit Error Rate versus Signal to Noise ratio (ES/No). The block calculates the BER itself internally by comparing the original data (pre-distortion) from input <code>i</code> with the post-distortion, post-decoding data on input <code>i+1</code>. So <code>(input_items[i] XOR input_items[i+1])</code> is the BER to plot for that particular Es/No point. Each curve is made with 8 data points, thus requiring 16 input ports.
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[[Category:Block Docs]]
 
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This block is lacking information. Please add some.
The Bercurve Sink can operate in two modes:
 
* Separate input ports
 
* Bus input ports
 
 
== Separate input ports ==
 
 
 
Using gnuradio-companion (GRC), the default configuration of a new Bercurve Sink is with 16 separate input ports <b>per curve</b>. The ports are paired: (0, 1), (2, 3), ... (14,15). Each input pair produces one point on the corresponding curve.
 
 
 
== Bus input ports ==
 
  
Instead of having so many separate input ports (16 times the number of curves), the sink can operate in the "Bus" mode, where all the data for one curve is grouped into one "bus". To activate this mode, right click on the Bercurve Sink block, select "More", then select "Toggle Sink Bus". This mode matches the output of a "BER Curve Gen." block. See the example flowgraph below.  
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It would seem this block takes a pair of byte input for each desired point in the BER curve and compare them to get the corresponding value.  
  
 
== Parameters ==
 
== Parameters ==
  
 
; esno
 
; esno
: Vector of SNR (ES/No) values to plot for. Typical value is <code>numpy.arange (0, 8, .5)</code>
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: Vector of SNR (ES/No) values to plot for. Number of input is len(esno)*2*Num Curves.
  
 
; Min. BER Errs.
 
; Min. BER Errs.
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; Block definition
 
; Block definition
 
: [https://github.com/gnuradio/gnuradio/blob/master/gr-qtgui/grc/qtgui_ber_sink_b.block.yml]
 
: [https://github.com/gnuradio/gnuradio/blob/master/gr-qtgui/grc/qtgui_ber_sink_b.block.yml]
 
[[Category:Block Docs]]
 

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