{{Information
|Description= Anatomy of a signal source
|Source=self-made
|Date=18-04-2008
|Author=Rwl10267 (talk) 21:14, 18 April 2008 (UTC)
|other_versions=
}}
{{PD-self|date=April 2008}}
{{Copy to Wikimedia Commons|bot=Fbot|priority=true|date=March 2012}}