Spectracom PRISMA VelaSync User Manual page 81

Note that the System Time affects not only NTP output, but also all other aspects of time man-
agement e.g., time distributed via channels other than NTP, logging, and time displayed in the
Web UI.
If VelaSync is operated as a Stratum 2 server, i.e. as a client to a Stratum 1 server (see "NTP
Stratum Synchronization" on page 1), the other server will override VelaSync's System Times-
cale, should it be different.
To change the system timescale VelaSync will use for its NTP output (and other outputs):
1.
2.
3.
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2 VelaSync User's Manual Rev. 1
Note: IMPORTANT: Make sure you select your desired timescale! Using the wrong
timescale will inevitably result in an undesired time error in your NTP clients.
Navigate to MANAGEMENT > OTHER: Time Management :
In the System Time panel, click the GEAR icon.
In the Edit System Time window, select the System Timescale VelaSync will be in:
UTC : The network PCs will receive UTC time via NTP.
TAI : The network PCs will receive TAI time via NTP.
GPS : The network PCs will receive GPS time via NTP.
Note: When the Timescale is set to "GPS", the
must be set correctly. As of May 2018, the offset between UTC and
GPS is 18 seconds.
2.10 Configuring NTP
GPS to UTC Offset
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