<name>out</name>
<type>$type.output</type>
</source>
+ <source>
+ <name>freq</name>
+ <type>float</type>
+ <optional>1</optional>
+ </source>
+ <source>
+ <name>phase</name>
+ <type>float</type>
+ <optional>1</optional>
+ </source>
+ <source>
+ <name>error</name>
+ <type>float</type>
+ <optional>1</optional>
+ </source>
</block>