A data source address that receives a periodic heartbeat signal from a collector.
If configured, a collector will write a value of 1 to this address every 60s.
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2