5.4.3.1 Adjusting-the-Time-Zone-Offset-
To!adjust!the!Time!zone!offset,!enter!the!number!of!hours!EAST!of!UTC!as!a!positive!
value,!and!the!number!of!hours!WEST!of!UTC!as!a!negative!value.!
5.4.3.2 Adjusting-1PPS-Output-settings-
The!PTU’s!1PPS!output!is!adjustable!in!both!width!and!phase.!
!
The!PTU!incorporates!a!unique!feature!that!allows!the!1PPS!outputs!to!be!offset!
from!the!main!internal!time!base!(which!is!synchronized!to!the!reference).!!This!
feature!may!be!used!to!compensate!for!propagation!delay!in!the!cables!between!the!
PTU!and!the!point!of!use.!
!
A!negative!delay!will!ADVANCE!the!1PPS!relative!to!the!reference.!
!
A!positive!delay!will!RETARD!the!1PPS!relative!to!the!reference.!
!
Each!individual!1PPS!output!can!be!delayed!over!a!full!second!range!(±!0.5!seconds)!
in!1ns!steps,!independent!of!the!settings!of!the!other!outputs.!
!
The!Pulse!width!may!be!varied!over!the!range!of!10ns!to!650µs!in!increments!of!5ns.!!
Enter!the!desired!pulse!width!(in!nanoseconds)!in!the!box!labeled!Output!1PPS!
Width!and!click!Submit.!The!pulse!width!setting!applies!to!all!1PPS!outputs.!
!
Select!the!checkbox!labeled!“Output!1PPS!Invert”!to!invert!the!1PPS!Output.!!Under!
normal!settings,!the!1PPS!output!provides!0V!of!current!and!increases!to!5V!for!each!
pulse.!!Inverting!it!changes!the1PPS!output!to!5V!and!drops!to!0V!for!the!duration!of!
the!pulse.!
!
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