--- /dev/null
+<?xml version="1.0"?>
+<!--
+###################################################
+##USRP2 Source
+###################################################
+ -->
+<block>
+ <name>USRP2 Source</name>
+ <key>usrp2_source_xxxx</key>
+ <import>from gnuradio import usrp2</import>
+ <make>#if not $interface() and not $mac_addr()
+usrp2.source_$(type.fcn)()
+#elif not $mac_addr()
+usrp2.source_$(type.fcn)($interface)
+#else
+usrp2.source_$(type.fcn)($interface, $mac_addr)
+#end if
+self.$(id).set_decim($decimation)
+self.$(id).set_center_freq($frequency)
+self.$(id).set_gain($gain)
+#if $lo_offset() != float('inf')
+self.$(id).set_lo_offset($lo_offset)
+#end if</make>
+ <callback>set_lo_offset($lo_offset)</callback>
+ <callback>set_decim($decimation)</callback>
+ <callback>set_center_freq($frequency)</callback>
+ <callback>set_gain($gain)</callback>
+ <param>
+ <name>Output Type</name>
+ <key>type</key>
+ <type>enum</type>
+ <option>
+ <name>Complex</name>
+ <key>complex</key>
+ <opt>fcn:32fc</opt>
+ </option>
+ <option>
+ <name>Short</name>
+ <key>short</key>
+ <opt>fcn:16sc</opt>
+ </option>
+ </param>
+ <param>
+ <name>Interface</name>
+ <key>interface</key>
+ <value></value>
+ <type>string</type>
+ </param>
+ <param>
+ <name>MAC Addr</name>
+ <key>mac_addr</key>
+ <value></value>
+ <type>string</type>
+ </param>
+ <param>
+ <name>Decimation</name>
+ <key>decimation</key>
+ <type>int</type>
+ </param>
+ <param>
+ <name>Frequency (Hz)</name>
+ <key>frequency</key>
+ <type>real</type>
+ </param>
+ <param>
+ <name>LO Offset (Hz)</name>
+ <key>lo_offset</key>
+ <value>float('inf')</value>
+ <type>real</type>
+ <hide>#if $lo_offset() == float('inf') then 'part' else 'none'#</hide>
+ <option>
+ <name>Default</name>
+ <key>float('inf')</key>
+ </option>
+ </param>
+ <param>
+ <name>Gain (dB)</name>
+ <key>gain</key>
+ <value>0</value>
+ <type>real</type>
+ </param>
+ <source>
+ <name>out</name>
+ <type>$type</type>
+ </source>
+ <doc>
+The USRP2 source outputs 100 Megasamples per second / decimation.
+
+To use the default ethernet device, leave interface blank. \
+For systems with only 1 USRP2, you may leave the mac address blank. \
+For multi-USRP2 systems, specify the mac address in the form 00:50:C2:85:3x:xx.
+ </doc>
+</block>