diff --git a/peak_det_eval.grc b/peak_det_eval.grc
index f918d65..6c2a7d0 100644
--- a/peak_det_eval.grc
+++ b/peak_det_eval.grc
@@ -397,7 +397,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(656, 508)</value>
+      <value>(640, 540)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -444,7 +444,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1136, 148)</value>
+      <value>(1216, 148)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -460,7 +460,7 @@
     </param>
     <param>
       <key>max_gain</key>
-      <value>100</value>
+      <value>50</value>
     </param>
     <param>
       <key>maxoutbuf</key>
@@ -483,61 +483,6 @@
       <value>float</value>
     </param>
   </block>
-  <block>
-    <key>analog_am_demod_cf</key>
-    <param>
-      <key>audio_decim</key>
-      <value>int(channel_rate/audio_rate)</value>
-    </param>
-    <param>
-      <key>audio_pass</key>
-      <value>2000</value>
-    </param>
-    <param>
-      <key>audio_stop</key>
-      <value>2300</value>
-    </param>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>chan_rate</key>
-      <value>channel_rate</value>
-    </param>
-    <param>
-      <key>comment</key>
-      <value></value>
-    </param>
-    <param>
-      <key>affinity</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>True</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(592, 164)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>id</key>
-      <value>analog_am_demod_cf_0</value>
-    </param>
-    <param>
-      <key>maxoutbuf</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>minoutbuf</key>
-      <value>0</value>
-    </param>
-  </block>
   <block>
     <key>analog_noise_source_x</key>
     <param>
@@ -806,7 +751,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1128, 324)</value>
+      <value>(1368, 172)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -880,6 +825,49 @@
       <value>1</value>
     </param>
   </block>
+  <block>
+    <key>blocks_complex_to_mag</key>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(712, 192)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>blocks_complex_to_mag_0</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>vlen</key>
+      <value>1</value>
+    </param>
+  </block>
   <block>
     <key>blocks_complex_to_mag_squared</key>
     <param>
@@ -943,7 +931,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1680, 308)</value>
+      <value>(1640, 276)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -966,37 +954,6 @@
       <value>N_FFT</value>
     </param>
   </block>
-  <block>
-    <key>blocks_message_debug</key>
-    <param>
-      <key>alias</key>
-      <value></value>
-    </param>
-    <param>
-      <key>comment</key>
-      <value></value>
-    </param>
-    <param>
-      <key>affinity</key>
-      <value></value>
-    </param>
-    <param>
-      <key>_enabled</key>
-      <value>1</value>
-    </param>
-    <param>
-      <key>_coordinate</key>
-      <value>(1088, 904)</value>
-    </param>
-    <param>
-      <key>_rotation</key>
-      <value>0</value>
-    </param>
-    <param>
-      <key>id</key>
-      <value>blocks_message_debug_0</value>
-    </param>
-  </block>
   <block>
     <key>blocks_multiply_const_vxx</key>
     <param>
@@ -1072,7 +1029,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1432, 196)</value>
+      <value>(1016, 276)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1170,7 +1127,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1360, 500)</value>
+      <value>(896, 828)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1276,7 +1233,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1648, 180)</value>
+      <value>(1208, 260)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1331,7 +1288,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(888, 804)</value>
+      <value>(360, 1004)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1382,7 +1339,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(888, 852)</value>
+      <value>(360, 1052)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1433,7 +1390,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1392, 772)</value>
+      <value>(928, 1092)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1484,7 +1441,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1392, 724)</value>
+      <value>(928, 1052)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1535,7 +1492,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(808, 180)</value>
+      <value>(880, 180)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1657,7 +1614,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1432, 276)</value>
+      <value>(1408, 244)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1779,7 +1736,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(728, 324)</value>
+      <value>(768, 308)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1830,7 +1787,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1096, 488)</value>
+      <value>(880, 432)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1869,7 +1826,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(888, 552)</value>
+      <value>(320, 176)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -1908,7 +1865,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1128, 688)</value>
+      <value>(664, 416)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2042,7 +1999,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1544, 468)</value>
+      <value>(1080, 796)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2097,7 +2054,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(896, 488)</value>
+      <value>(328, 232)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2140,7 +2097,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1136, 624)</value>
+      <value>(664, 464)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2183,7 +2140,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(968, 160)</value>
+      <value>(1048, 160)</value>
     </param>
     <param>
       <key>_rotation</key>
@@ -2193,6 +2150,10 @@
       <key>id</key>
       <value>jay_squelch_0</value>
     </param>
+    <param>
+      <key>initValue</key>
+      <value>0.0</value>
+    </param>
     <param>
       <key>maxoutbuf</key>
       <value>0</value>
@@ -2202,6 +2163,81 @@
       <value>0</value>
     </param>
   </block>
+  <block>
+    <key>low_pass_filter</key>
+    <param>
+      <key>beta</key>
+      <value>6.76</value>
+    </param>
+    <param>
+      <key>alias</key>
+      <value></value>
+    </param>
+    <param>
+      <key>comment</key>
+      <value></value>
+    </param>
+    <param>
+      <key>affinity</key>
+      <value></value>
+    </param>
+    <param>
+      <key>cutoff_freq</key>
+      <value>1500</value>
+    </param>
+    <param>
+      <key>decim</key>
+      <value>int(channel_rate/audio_rate)</value>
+    </param>
+    <param>
+      <key>_enabled</key>
+      <value>True</value>
+    </param>
+    <param>
+      <key>type</key>
+      <value>fir_filter_ccf</value>
+    </param>
+    <param>
+      <key>_coordinate</key>
+      <value>(536, 140)</value>
+    </param>
+    <param>
+      <key>_rotation</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>gain</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>id</key>
+      <value>low_pass_filter_0</value>
+    </param>
+    <param>
+      <key>interp</key>
+      <value>1</value>
+    </param>
+    <param>
+      <key>maxoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>minoutbuf</key>
+      <value>0</value>
+    </param>
+    <param>
+      <key>samp_rate</key>
+      <value>channel_rate</value>
+    </param>
+    <param>
+      <key>width</key>
+      <value>100</value>
+    </param>
+    <param>
+      <key>win</key>
+      <value>firdes.WIN_HAMMING</value>
+    </param>
+  </block>
   <block>
     <key>qtgui_freq_sink_x</key>
     <param>
@@ -2250,7 +2286,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(984, 36)</value>
+      <value>(1088, 364)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -2537,7 +2573,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1080, 804)</value>
+      <value>(552, 1004)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -2904,7 +2940,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(1584, 724)</value>
+      <value>(1120, 1052)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -3271,7 +3307,7 @@
     </param>
     <param>
       <key>_coordinate</key>
-      <value>(360, 92)</value>
+      <value>(320, 84)</value>
     </param>
     <param>
       <key>gui_hint</key>
@@ -4803,12 +4839,6 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
-  <connection>
-    <source_block_id>analog_am_demod_cf_0</source_block_id>
-    <sink_block_id>dc_blocker_xx_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_add_xx_0</sink_block_id>
@@ -4851,6 +4881,12 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>blocks_complex_to_mag_0</source_block_id>
+    <sink_block_id>dc_blocker_xx_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
   <connection>
     <source_block_id>blocks_complex_to_mag_squared_0</source_block_id>
     <sink_block_id>blocks_nlog10_ff_0</sink_block_id>
@@ -4955,7 +4991,7 @@
   </connection>
   <connection>
     <source_block_id>freq_xlating_fir_filter_xxx_0_0</source_block_id>
-    <sink_block_id>analog_am_demod_cf_0</sink_block_id>
+    <sink_block_id>low_pass_filter_0</sink_block_id>
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
@@ -5043,6 +5079,12 @@
     <source_key>0</source_key>
     <sink_key>0</sink_key>
   </connection>
+  <connection>
+    <source_block_id>low_pass_filter_0</source_block_id>
+    <sink_block_id>blocks_complex_to_mag_0</sink_block_id>
+    <source_key>0</source_key>
+    <sink_key>0</sink_key>
+  </connection>
   <connection>
     <source_block_id>uhd_usrp_source_1</source_block_id>
     <sink_block_id>blocks_add_xx_0</sink_block_id>