Brandywine Portable Timing Unit - Viewing System Status Information

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MANUAL&P/N&900000118&REV&D&
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5.3 Viewing(the(Current(Status(of(the(PTU(system(
From!the!“MENU”!button,!select!“General”!from!the!status!menu.!!This!shows!
information!such!as!the!current!output!time,!UTC!time,!up!time,!the!current!input!
reference,!the!current!output!format,!current!system!state,!alarm!status,!battery!
status,!and!current!internal!temperature.!
Figure+4+-+PTU+Status+Page+
Output+Time:!The!current!time!of!day!being!displayed!or!being!output!by!the!PTU!
UTC+Time:!The!current!time!of!day!from!the!GPS!constellation!in!Universal!Time!
Coordinate!(UTC)!
Up+Time:!!The!amount!of!time!that!the!PTU!has!been!powered!on!
Hour+Meter:!!This!is!the!number!of!hours!since!the!PTU!was!first!built.!
Reference:!The!current!reference!input!being!used!by!the!PTU!
Output+TimeCode:!The!current!timecode!format!in!use!by!the!PTU’s!outputs!
TFOM:!Time!Figure!Of!Merit!–!the!difference!between!the!unit’s!time!and!the!
reference!input.!!A!1!means!the!unit!is!accurate!to!within!1ns,!a!2!means!the!unit!is!
accurate!to!within!10ns,!a!3!means!100ns,!etc!
System+state:!The!current!mode!of!the!PTU’s!internal!clock!
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