Spectracom VelaSync 1232 User Manual page 114

3.2 System Time
c. A system is used for simulation or testing purposes, and UTC traceability is not
required.
The Accuracy of the Battery Backed Time ...
... depends on the accuracy of the hand-set time if the time is set manually in an
autonomous system. In a non-autonomous system (i.e, when using external reference
(s)) VelaSync's System Clock will regularly update the battery-backed time.
Another factor impacting the accuracy of the battery- backed time is how long a
VelaSync unit is powered off: Any significant amount of time will cause the battery-
backed RTC to drift, i.e. the battery-backed time will become increasingly inaccurate.
The battery used for the RTC is designed to last for the lifetime of the product.
Distributing battery-backed time over NTP
When distributing a hand-set, battery backed time via NTP, please set the time rel-
atively close to UTC, so as to prevent NTP synchronization problems when transitioning
from the hand-set time to a UTC-based external input reference. See also
ence Priorities" on
To use the battery-backed time as the synchronized time at start-up:
1. Navigate to
2. In the
3. The
Battery Backed Time on
102
the system needs to be able to completely recover from a temporary
power loss, or similar, without human intervention.
page 111.
MANAGEMENT > OTHER: Time
System Time panel click the GEAR icon.
Edit System Time window will display. Select the checkbox
Startup:
Management.
CHAPTER 3 • VelaSync User's Manual Rev. 3
"Input Refer-
Synchronize to