Brandywine Portable Timing Unit - Technical Specifications of the PTU; Internal Battery Backup and Runtime; Time Display and Controls; Weatherproof Enclosure Design

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MANUAL&P/N&900000118&REV&D&
6!
Internal+Battery+Backup!
The!PTU!contains!an!internal!7Ah!battery!that!will!operate!the!system!in!the!event!
prime!power!is!lost.!The!battery!charge!is!monitored!and!maintained!whenever!
prime!power!is!applied!to!the!PTU.!Status!is!indicated!by!front!panel!LED’s.!Battery!
life!is!dependent!upon!the!oscillator!configuration!selected!and!the!ambient!
temperature,!but!5!hours!is!typical!for!the!OCXO!version.!
Time+Display!
An!11!digit!display!indicates!Years,!Days,!Hours,!Minutes!and!Seconds.!Illumination!
of!the!display!is!controlled!by!a!front!panel!switch!to!conserve!battery!life.!
Weatherproof+Enclosure!
The!PTU!is!housed!in!a!sturdy!weatherproof!enclosure!that!is!suitable!for!outdoor!
use!in!all!weather!conditions.!!
2 Specifications(
Satellite!Signal!
GPS!L
1!
1575.42!MHz!
Satellite!Code!
C/A!1.023!MHz!
Receiver!Type!
Parallel!16!Channel.!!All-in-view!
satellites!tracked!continuously!and!
simultaneously!
Warm!Start!
<10!sec!(Open!Sky)!
Autonomous!Start!
<60!Seconds!Cold!Start!(Open!Sky)!
Cold!Start!Requirement!
Automatic:!No!input!of!time!of!position!
required!
Position!Accuracy!
2.4!m!horizontal,!5!m!altitude!with!
respect!to!WGS84!after!24!hour!position!
averaging!
Timing!Accuracy!(tracking!satellites)!
±!50!ns.!Absolute!UTC!.!
Std!Deviation!15ns!(OCXO)!
Timing!Accuracy!(holdover!mode,!±!5ºC)!
<!20ms/day!(TCXO)!
<!50!µsec/day!(OCXO)!
<!5!µsec!/!day!(Rb)!
1PPS!Output!
! Connector!
! Level!
!
! On!Time!
!
BNC!
0-5V!or!0-10V!into!50Ω!link!selectable!
by!user!
Rising!Edge!
Network!Interface!
! Interface!Type!
! Protocols!
!
10/100BaseT!
TCP/IP,!UDP,!NTPv3,!HTTP,!SNMP!v1,!
DHCP!
Serial!Interface!
! Type!
! Baud!Rate!
! Content!
!
RS232!
9600,!N,8,1!
User!configurable,!broadcast!1/sec!