Spectracom VelaSync 1232 User Manual page 129

Use cases for the "User/User" reference
The
a. No external references are available (yet), but you need a reference for testing or
b. No external references are required e.g., if VelaSync is used solely to synchronize
c. To utilize a backup reference as soon as possible after a power cycle or reboot of
Combining a
typical use case. Use the
Reference" on
Built-in safety barrier
In order to "validate" (=
time must be manually submitted every time after VelaSync reboots or resets, or after
the Holdover period has expired: In the
Manual Time Set
become valid the moment the Submit button is clicked.
See also below,
the validity of the User/User reference also serves as a safety feature.
CHAPTER 3 • VelaSync User's Manual Rev. 3
User/User reference is provided for the following use cases:
setup purposes. This may be the case e.g., while waiting for a GNSS antenna to be
installed.
computers on a network, with no need for traceable UTC-based timing.
VelaSync, while waiting for the primary reference (e.g., GNSS) to become valid.
To this end, in the Edit System Time
tery Backed Time on Startup
is assigned a reference priority number other than "1". Note that a Time jump
and/or 1PPS jump are likely to happen once the primary reference becomes valid.
User Time reference with a
Local System
page 115.
green
must be checked. The System Time displayed in the field below will
"How long will the User/User reference be
window, the checkbox
must be checked, AND the
non-User 1PPS reference or vice versa is not a
reference instead, see
status lights) the User/User
Edit System Time
3.3 Managing References
Synchronize to Bat-
User/User reference
"The "Local System"
reference, the hand-set
window, the checkbox
valid?": The notion of limiting
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