--- /dev/null
+<?xml version="1.0"?>
+<block>
+ <name>HRPT PLL</name>
+ <key>noaa_hrpt_pll_cf</key>
+ <category>NOAA</category>
+ <import>from gnuradio import noaa</import>
+ <make>noaa.hrpt_pll_cf($alpha, $beta, $max_offset)</make>
+ <callback>set_alpha($alpha)</callback>
+ <callback>set_beta($beta)</callback>
+ <callback>set_max_offset($max_offset)</callback>
+ <param>
+ <name>Alpha</name>
+ <key>alpha</key>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Beta</name>
+ <key>beta</key>
+ <type>real</type>
+ </param>
+ <param>
+ <name>Max Offset</name>
+ <key>max_offset</key>
+ <type>real</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>complex</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>float</type>
+ </source>
+</block>