!
LEDs!are!used!to!indicate!whether!the!device!is!set! t o!HaveQuick!or!IRIG!as!input!
reference.!!If!neither!the!HaveQuick!or!IRIG! I n!LEDs!are!lit,!the!unit!is!set!for!GPS!
operation.!
!
A!fault!LED!will!illuminate!if!any!internal!fault!is!detected.!!These!faults!include!
output!signal!levels,!internal!communication!errors!and!oscillator!problems.!
!
If!the!unit!is!in!GPS!reference!mode!and!is!tracking!at!least!4!satellites,!the!GPS!
locked!LED!will!light!up.!!!
!
The!Time!Valid!LED!will!illuminate!when!the!selected!reference!is!being!decoded!
without!error.!!In!addition,!for!GPS!reference,!the!Time!Valid!LED!will!stay!on!for!8!
hours!after!the!unit!has!stopped!tracking!satellites.!
4.2.8 Battery(Charge/Discharge(operation(
The!Charge!LED!turns!solid!yellow!when!external!power!is!present!and!the!battery!
is!charging.!!When!external!power!is!removed!and!the!battery!starts!discharging,!the!
Charge!LED!will!start!flashing!slowl y.!
!
The!Battery!Low!red!LED!will!flash!when!the!battery!voltage!level !drops!b el ow !11V.!!
When!the!level!drops!below!10.5V,!the!LED!will!turn!solid!red.!The!unit!will!turn!off!
automatically!when!the!battery!voltage!drops!below!10V.!
!
If!the!battery!level!reaches!a!critically!low!point,!a!speaker!in!the!unit!will!start!
beeping!to!alert!the!user!to!the!low!battery.!!When!the!battery!charge!level!reaches!a!
very!critically!low!point,!it!will!emit!a!continuous!tone!until!it!automatically!powers!
down.!
!
To!charge!the!battery,!reconnect!external!AC!or!DC!power,!and!turn!the!front!panel!
power!switch!on.!
5 Web(Interface(
5.1 Accessing(the(web-based(interface(
When!the!unit!is!powered!up,!the!display!will!show!its!IP!address!as!part!of!the!
startup!sequence.!!Enter!this!IP!Address!into!the!address!bar!of!your!web!browser.!!!
This!will!bring!up!the!PTU’s!main!information!page.!!(See!Figure!2!-!PTU!
Management!Web!Page)!
!
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