--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##Constellation Sink
+###################################################
+ -->
+<block>
+ <name>Constellation Sink</name>
+ <key>wxgui_constellationsink2</key>
+ <import>from gnuradio.wxgui import constsink_gl</import>
+ <make>constsink_gl.const_sink_c(
+ self.GetWin(),
+ title=$title,
+ sample_rate=$samp_rate,
+ frame_rate=$frame_rate,
+ const_size=$const_size,
+ M=$M,
+ theta=$theta,
+ alpha=$alpha,
+ fmax=$fmax,
+ mu=$mu,
+ gain_mu=$gain_mu,
+ symbol_rate=$symbol_rate,
+ omega_limit=$omega_limit,
+)
+#set $grid_pos = $grid_pos()
+#if not grid_pos
+self.Add(self.$(id).win)
+#else
+self.GridAdd(self.$(id).win, $grid_pos[0], $grid_pos[1], $grid_pos[2], $grid_pos[3])
+#end if</make>
+ <callback>set_sample_rate($samp_rate)</callback>
+ <param>
+ <name>Title</name>
+ <key>title</key>
+ <value>Constellation Plot</value>
+ <type>string</type>
+ </param>
+ <param>
+ <name>Sample Rate</name>
+ <key>samp_rate</key>
+ <value>samp_rate</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Frame Rate</name>
+ <key>frame_rate</key>
+ <value>5</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Constellation Size</name>
+ <key>const_size</key>
+ <value>2048</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>M</name>
+ <key>M</key>
+ <value>4</value>
+ <type>int</type>
+ </param>
+ <param>
+ <name>Theta</name>
+ <key>theta</key>
+ <value>0</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Alpha</name>
+ <key>alpha</key>
+ <value>0.005</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Max Freq</name>
+ <key>fmax</key>
+ <value>0.06</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Mu</name>
+ <key>mu</key>
+ <value>0.5</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Gain Mu</name>
+ <key>gain_mu</key>
+ <value>0.005</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Symbol Rate</name>
+ <key>symbol_rate</key>
+ <value>samp_rate/4.</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Omega Limit</name>
+ <key>omega_limit</key>
+ <value>0.005</value>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Grid Position</name>
+ <key>grid_pos</key>
+ <value></value>
+ <type>grid_pos</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>complex</type>
+ </sink>
+ <doc>
+Use the Grid Position (row, column, row span, column span) to position the graphical element in the window.
+ </doc>
+</block>