098-00720-000 Revision D1 – February, 2018 SyncServer 600 Series User’s Guide 203
Chapter 6 Provisioning
Provisioning Inputs with Manual Entry Controls
If GPS is not a qualified reference, then manual control of leap will be allowed at
any time except when the remaining time until leap is within the timeframe of the
qualified time input shown in Figure 9 that has the longest timeframe. In this
region, the inputs are expected to provide the leap pending status.
An example where the manual input can help to provide maximum notification to
all outputs occurs if IRIG 1344 is the only time input and the S6xx is operating as
a PTP GrandMaster. Since the manual input is allowed all the way up to the
minute prior to the leap moment, the user can manually enter the pending leap
days (even weeks) prior to the leap event. Since the S6xx knows that the IRIG
input won¡¦t provide any information until the last minute, the manual input is
accepted. There is no problem providing the manual notification early because
the S6xx knows to hold off based on the appropriate timeframe for the signal
type. In this case with PTP output, the notification will appear in the PTP
Announce messages . day prior to the event, just as it would have done if the
input had been GPS (or even NTP).
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