[Commit-gnuradio] [gnuradio] 03/07: analog: fixes calculation of complex noise sources from the amplitude setting.

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commit 5335005bcfbd671a0760bde08e69ef867b7ffc24
Author: Tom Rondeau <address@hidden>
Date:   Mon May 11 17:42:15 2015 -0400

    analog: fixes calculation of complex noise sources from the amplitude
    setting.
    
    This had been producing 3 dB more power for complex sources than real
    sources for the same amplitude setting. Added a noise_power.grc
    example file to explore this.
---
 gr-analog/examples/CMakeLists.txt                  |    7 +
 gr-analog/examples/noise_power.grc                 | 1675 ++++++++++++++++++++
 .../include/gnuradio/analog/fastnoise_source_X.h.t |   23 +-
 .../include/gnuradio/analog/noise_source_X.h.t     |   23 +-
 gr-analog/lib/fastnoise_source_X_impl.cc.t         |    9 +-
 gr-analog/lib/noise_source_X_impl.cc.t             |    9 +-
 6 files changed, 1736 insertions(+), 10 deletions(-)

diff --git a/gr-analog/examples/CMakeLists.txt 
b/gr-analog/examples/CMakeLists.txt
index f0f55b5..acb0656 100644
--- a/gr-analog/examples/CMakeLists.txt
+++ b/gr-analog/examples/CMakeLists.txt
@@ -25,3 +25,10 @@ GR_PYTHON_INSTALL(PROGRAMS
     DESTINATION ${GR_PKG_ANALOG_EXAMPLES_DIR}
     COMPONENT "analog_python"
 )
+
+install(
+    FILES
+    noise_power.grc
+    DESTINATION ${GR_PKG_ANALOG_EXAMPLES_DIR}
+    COMPONENT "analog_python"
+)
diff --git a/gr-analog/examples/noise_power.grc 
b/gr-analog/examples/noise_power.grc
new file mode 100644
index 0000000..10a8c62
--- /dev/null
+++ b/gr-analog/examples/noise_power.grc
@@ -0,0 +1,1675 @@
+<?xml version='1.0' encoding='ASCII'?>
+<?grc format='1' created='3.7.7'?>
+<flow_graph>
+  <timestamp>Sun May 10 20:26:24 2015</timestamp>
+  <block>
+    <key>options</key>
+    <param>
+      <key>id</key>
+      <value>noise_power</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>title</key>
+      <value></value>
+    </param>
+    <param>
+      <key>author</key>
+      <value></value>
+    </param>
+    <param>
+      <key>description</key>
+      <value></value>
+    </param>
+    <param>
+      <key>window_size</key>
+      <value>1280, 1024</value>
+    </param>
+    <param>
+      <key>generate_options</key>
+      <value>qt_gui</value>
+    </param>
+    <param>
+      <key>category</key>
+      <value>Custom</value>
+    </param>
+    <param>
+      <key>run_options</key>
+      <value>prompt</value>
+    </param>
+    <param>
+      <key>run</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>max_nouts</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>realtime_scheduling</key>
+      <value></value>
+    </param>
+    <param>
+      <key>thread_safe_setters</key>
+      <value></value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 11)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable</key>
+    <param>
+      <key>id</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>32000</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(176, 11)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_fastnoise_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_fastnoise_source_x_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>noise_type</key>
+      <value>analog.GR_GAUSSIAN</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>noise</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>samples</key>
+      <value>8192</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 75)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_noise_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_noise_source_x_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>noise_type</key>
+      <value>analog.GR_GAUSSIAN</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>noise</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 267)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_throttle</key>
+    <param>
+      <key>id</key>
+      <value>blocks_throttle_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(208, 99)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_throttle</key>
+    <param>
+      <key>id</key>
+      <value>blocks_throttle_0_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>complex</value>
+    </param>
+    <param>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(208, 283)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_complex_to_mag_squared</key>
+    <param>
+      <key>id</key>
+      <value>blocks_complex_to_mag_squared_2</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(368, 104)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_complex_to_mag_squared</key>
+    <param>
+      <key>id</key>
+      <value>blocks_complex_to_mag_squared_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(368, 288)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_fastnoise_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_fastnoise_source_x_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>noise_type</key>
+      <value>analog.GR_GAUSSIAN</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>noise</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>samples</key>
+      <value>8192</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 171)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>analog_noise_source_x</key>
+    <param>
+      <key>id</key>
+      <value>analog_noise_source_x_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>noise_type</key>
+      <value>analog.GR_GAUSSIAN</value>
+    </param>
+    <param>
+      <key>amp</key>
+      <value>noise</value>
+    </param>
+    <param>
+      <key>seed</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 347)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_throttle</key>
+    <param>
+      <key>id</key>
+      <value>blocks_throttle_0_2</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(208, 363)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_throttle</key>
+    <param>
+      <key>id</key>
+      <value>blocks_throttle_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>samples_per_second</key>
+      <value>samp_rate</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>ignoretag</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
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+      <value>0</value>
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+      <value></value>
+    </param>
+    <param>
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+      <value>(208, 195)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_abs_xx</key>
+    <param>
+      <key>id</key>
+      <value>blocks_abs_xx_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
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+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
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+      <value>(368, 200)</value>
+    </param>
+    <param>
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+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_multiply_xx</key>
+    <param>
+      <key>id</key>
+      <value>blocks_multiply_xx_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
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+      <value>float</value>
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+    <param>
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+      <value>2</value>
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+    <param>
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+      <value>1</value>
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+    <param>
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+      <value></value>
+    </param>
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+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
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+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
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+      <value>(480, 184)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_nlog10_ff</key>
+    <param>
+      <key>id</key>
+      <value>blocks_nlog10_ff_0_2</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>n</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>k</key>
+      <value>0</value>
+    </param>
+    <param>
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+      <value>1</value>
+    </param>
+    <param>
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+      <value></value>
+    </param>
+    <param>
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+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(784, 355)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>single_pole_iir_filter_xx</key>
+    <param>
+      <key>id</key>
+      <value>single_pole_iir_filter_xx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alpha</key>
+      <value>0.001</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(592, 99)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>single_pole_iir_filter_xx</key>
+    <param>
+      <key>id</key>
+      <value>single_pole_iir_filter_xx_0_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alpha</key>
+      <value>0.001</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(592, 283)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_nlog10_ff</key>
+    <param>
+      <key>id</key>
+      <value>blocks_nlog10_ff_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>n</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>k</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(784, 91)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_nlog10_ff</key>
+    <param>
+      <key>id</key>
+      <value>blocks_nlog10_ff_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>n</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>k</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(784, 187)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_nlog10_ff</key>
+    <param>
+      <key>id</key>
+      <value>blocks_nlog10_ff_0_1</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>n</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>k</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(784, 275)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>single_pole_iir_filter_xx</key>
+    <param>
+      <key>id</key>
+      <value>single_pole_iir_filter_xx_0_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alpha</key>
+      <value>0.001</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(592, 195)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>single_pole_iir_filter_xx</key>
+    <param>
+      <key>id</key>
+      <value>single_pole_iir_filter_xx_0_2</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alpha</key>
+      <value>0.001</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(592, 363)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_abs_xx</key>
+    <param>
+      <key>id</key>
+      <value>blocks_abs_xx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(368, 368)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>blocks_multiply_xx</key>
+    <param>
+      <key>id</key>
+      <value>blocks_multiply_xx_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>num_inputs</key>
+      <value>2</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(480, 352)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>qtgui_number_sink</key>
+    <param>
+      <key>id</key>
+      <value>qtgui_number_sink_0</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>name</key>
+      <value>""</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>float</value>
+    </param>
+    <param>
+      <key>autoscale</key>
+      <value>False</value>
+    </param>
+    <param>
+      <key>avg</key>
+      <value>0.01</value>
+    </param>
+    <param>
+      <key>graph_type</key>
+      <value>qtgui.NUM_GRAPH_NONE</value>
+    </param>
+    <param>
+      <key>nconnections</key>
+      <value>4</value>
+    </param>
+    <param>
+      <key>min</key>
+      <value>-1</value>
+    </param>
+    <param>
+      <key>max</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>update_time</key>
+      <value>0.10</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>label1</key>
+      <value>Complex Fast</value>
+    </param>
+    <param>
+      <key>unit1</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color1</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor1</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label2</key>
+      <value>Real Fast</value>
+    </param>
+    <param>
+      <key>unit2</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color2</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor2</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label3</key>
+      <value>Complex Noise</value>
+    </param>
+    <param>
+      <key>unit3</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color3</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor3</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label4</key>
+      <value>Real Noise</value>
+    </param>
+    <param>
+      <key>unit4</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color4</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor4</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit5</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color5</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor5</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit6</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color6</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor6</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit7</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color7</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor7</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit8</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color8</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor8</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit9</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color9</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor9</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>label10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>unit10</key>
+      <value></value>
+    </param>
+    <param>
+      <key>color10</key>
+      <value>("black", "black")</value>
+    </param>
+    <param>
+      <key>factor10</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(992, 208)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <block>
+    <key>variable_qtgui_range</key>
+    <param>
+      <key>id</key>
+      <value>noise</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>label</key>
+      <value>Noise Amplitude</value>
+    </param>
+    <param>
+      <key>value</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>start</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>stop</key>
+      <value>10</value>
+    </param>
+    <param>
+      <key>step</key>
+      <value>0.1</value>
+    </param>
+    <param>
+      <key>widget</key>
+      <value>counter_slider</value>
+    </param>
+    <param>
+      <key>orient</key>
+      <value>Qt.Horizontal</value>
+    </param>
+    <param>
+      <key>min_len</key>
+      <value>200</value>
+    </param>
+    <param>
+      <key>gui_hint</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(8, 435)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+  </block>
+  <connection>
+    <source_block_id>analog_fastnoise_source_x_0</source_block_id>
+    <sink_block_id>blocks_throttle_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>analog_fastnoise_source_x_1</source_block_id>
+    <sink_block_id>blocks_throttle_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>analog_noise_source_x_0</source_block_id>
+    <sink_block_id>blocks_throttle_0_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>analog_noise_source_x_1</source_block_id>
+    <sink_block_id>blocks_throttle_0_2</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0</source_block_id>
+    <sink_block_id>blocks_complex_to_mag_squared_2</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0_1</source_block_id>
+    <sink_block_id>blocks_complex_to_mag_squared_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0_2</source_block_id>
+    <sink_block_id>blocks_abs_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_throttle_0_0</source_block_id>
+    <sink_block_id>blocks_abs_xx_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_abs_xx_0</source_block_id>
+    <sink_block_id>blocks_multiply_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_abs_xx_0</source_block_id>
+    <sink_block_id>blocks_multiply_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>1</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_abs_xx_0_0</source_block_id>
+    <sink_block_id>blocks_multiply_xx_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>1</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_abs_xx_0_0</source_block_id>
+    <sink_block_id>blocks_multiply_xx_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>single_pole_iir_filter_xx_0</source_block_id>
+    <sink_block_id>blocks_nlog10_ff_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>single_pole_iir_filter_xx_0_0</source_block_id>
+    <sink_block_id>blocks_nlog10_ff_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>single_pole_iir_filter_xx_0_1</source_block_id>
+    <sink_block_id>blocks_nlog10_ff_0_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>single_pole_iir_filter_xx_0_2</source_block_id>
+    <sink_block_id>blocks_nlog10_ff_0_2</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_nlog10_ff_0</source_block_id>
+    <sink_block_id>qtgui_number_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_nlog10_ff_0_0</source_block_id>
+    <sink_block_id>qtgui_number_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>1</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_nlog10_ff_0_1</source_block_id>
+    <sink_block_id>qtgui_number_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>2</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_nlog10_ff_0_2</source_block_id>
+    <sink_block_id>qtgui_number_sink_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>3</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_multiply_xx_0_0</source_block_id>
+    <sink_block_id>single_pole_iir_filter_xx_0_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_multiply_xx_0</source_block_id>
+    <sink_block_id>single_pole_iir_filter_xx_0_2</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_complex_to_mag_squared_1</source_block_id>
+    <sink_block_id>single_pole_iir_filter_xx_0_1</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+  <connection>
+    <source_block_id>blocks_complex_to_mag_squared_2</source_block_id>
+    <sink_block_id>single_pole_iir_filter_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
+</flow_graph>
diff --git a/gr-analog/include/gnuradio/analog/fastnoise_source_X.h.t 
b/gr-analog/include/gnuradio/analog/fastnoise_source_X.h.t
index a6377ad..8506339 100644
--- a/gr-analog/include/gnuradio/analog/fastnoise_source_X.h.t
+++ b/gr-analog/include/gnuradio/analog/fastnoise_source_X.h.t
@@ -47,10 +47,15 @@ namespace gr {
       typedef boost::shared_ptr<@BASE_NAME@> sptr;
 
       /*! \brief Make a fast noise source
-       * \param type    the random distribution to use (see 
gnuradio/analog/noise_type.h)
-       * \param ampl    a scaling factor for the output; for Gaussian sources, 
this is the std. dev.
-       * \param seed    seed for random generators. Note that for uniform and
-       *                Gaussian distributions, this should be a negative 
number.
+       * \param type the random distribution to use (see
+       *        gnuradio/analog/noise_type.h)
+       * \param ampl the standard deviation of a 1-d noise process. If
+       *        this is the complex source, this parameter is split
+       *        among the real and imaginary parts:
+       *        <pre>(ampl/sqrt(2))x + j(ampl/sqrt(2))y</pre>
+       * \param seed seed for random generators. Note that for uniform
+       *        and Gaussian distributions, this should be a negative
+       *        number.
        * \param samples Number of samples to pre-generate
        */
       static sptr make(noise_type_t type, float ampl,
@@ -58,7 +63,17 @@ namespace gr {
       virtual @TYPE@ sample() = 0;
       virtual @TYPE@ sample_unbiased() = 0;
 
+      /*!
+       * Set the noise type. Nominally from the
+       * gr::analog::noise_type_t selections, but only GR_GAUSSIAN and
+       * GR_UNIFORM are currently available.
+       */
       virtual void set_type(noise_type_t type) = 0;
+
+      /*!
+       * Set the standard deviation (amplitude) of the 1-d noise
+       * process.
+       */
       virtual void set_amplitude(float ampl) = 0;
 
       virtual noise_type_t type() const = 0;
diff --git a/gr-analog/include/gnuradio/analog/noise_source_X.h.t 
b/gr-analog/include/gnuradio/analog/noise_source_X.h.t
index 31e742a..f619ca5 100644
--- a/gr-analog/include/gnuradio/analog/noise_source_X.h.t
+++ b/gr-analog/include/gnuradio/analog/noise_source_X.h.t
@@ -47,14 +47,29 @@ namespace gr {
       typedef boost::shared_ptr<@BASE_NAME@> sptr;
 
       /*! Build a noise source
-       * \param type the random distribution to use (see 
gnuradio/analog/noise_type.h)
-       * \param ampl a scaling factor for the output; for Gaussian sources, 
this is the std. dev.
-       * \param seed seed for random generators. Note that for uniform and
-       *             Gaussian distributions, this should be a negative number.
+       * \param type the random distribution to use (see
+       *        gnuradio/analog/noise_type.h)
+       * \param ampl the standard deviation of a 1-d noise process. If
+       *        this is the complex source, this parameter is split
+       *        among the real and imaginary parts:
+       *        <pre>(ampl/sqrt(2))x + j(ampl/sqrt(2))y</pre>
+       * \param seed seed for random generators. Note that for uniform
+       *        and Gaussian distributions, this should be a negative
+       *        number.
        */
       static sptr make(noise_type_t type, float ampl, long seed=0);
 
+      /*!
+       * Set the noise type. Nominally from the
+       * gr::analog::noise_type_t selections, but only GR_GAUSSIAN and
+       * GR_UNIFORM are currently available.
+       */
       virtual void set_type(noise_type_t type) = 0;
+
+      /*!
+       * Set the standard deviation (amplitude) of the 1-d noise
+       * process.
+       */
       virtual void set_amplitude(float ampl) = 0;
 
       virtual noise_type_t type() const = 0;
diff --git a/gr-analog/lib/fastnoise_source_X_impl.cc.t 
b/gr-analog/lib/fastnoise_source_X_impl.cc.t
index c25230d..21f963b 100644
--- a/gr-analog/lib/fastnoise_source_X_impl.cc.t
+++ b/gr-analog/lib/fastnoise_source_X_impl.cc.t
@@ -45,7 +45,11 @@ namespace gr {
                    io_signature::make(0, 0, 0),
                    io_signature::make(1, 1, sizeof(@TYPE@))),
       d_type(type),
+#if @IS_COMPLEX@       // complex?
+      d_ampl(ampl/sqrtf(2.0f)),
+#else
       d_ampl(ampl),
+#endif
       d_rng(seed)
     {
       d_samples.resize(samples);
@@ -68,7 +72,11 @@ namespace gr {
     @IMPL_NAME@::set_amplitude(float ampl)
     {
       gr::thread::scoped_lock l(d_setlock);
+#if @IS_COMPLEX@       // complex?
+      d_ampl = ampl/sqrtf(2.0f);
+#else
       d_ampl = ampl;
+#endif
       generate();
     }
 
@@ -165,4 +173,3 @@ namespace gr {
 
   } /* namespace analog */
 } /* namespace gr */
-
diff --git a/gr-analog/lib/noise_source_X_impl.cc.t 
b/gr-analog/lib/noise_source_X_impl.cc.t
index 960666f..d8c1b7e 100644
--- a/gr-analog/lib/noise_source_X_impl.cc.t
+++ b/gr-analog/lib/noise_source_X_impl.cc.t
@@ -45,7 +45,11 @@ namespace gr {
                    io_signature::make(0, 0, 0),
                    io_signature::make(1, 1, sizeof(@TYPE@))),
       d_type(type),
+#if @IS_COMPLEX@       // complex?
+      d_ampl(ampl/sqrtf(2.0f)),
+#else
       d_ampl(ampl),
+#endif
       d_rng(seed)
     {
     }
@@ -65,7 +69,11 @@ namespace gr {
     @IMPL_NAME@::set_amplitude(float ampl)
     {
       gr::thread::scoped_lock l(d_setlock);
+#if @IS_COMPLEX@       // complex?
+      d_ampl = ampl/sqrtf(2.0f);
+#else
       d_ampl = ampl;
+#endif
     }
 
     int
@@ -129,4 +137,3 @@ namespace gr {
 
   } /* namespace analog */
 } /* namespace gr */
-