Safran VersaSync User Manual page 192

3.3 Managing References
Use cases for the "User/User" reference
The User/User reference is provided for the following use cases:
a. No external references are available (yet), but you need a reference for test-
b. No external references are required e.g., if VersaSync is used solely to syn-
c. To utilize a backup reference as soon as possible after a power cycle or
Combining a User Time reference with a non-User 1PPS reference or vice versa is
not a typical use case. Use the Local System reference instead, see
System" Reference" on
Built-in safety barrier
In order to "validate" (=
set time must be manually submitted every time after VersaSync reboots or
resets, or after the Holdover period has expired: In the Edit System Time window,
the checkbox Manual Time Set must be checked. The System Time displayed in
the field below will become valid the moment the Submit button is clicked.
178
Caution: Since the
erence, it does not qualify as a legitimate time source. Operating Ver-
saSync with a manually set
outputting an illegitimate System Time thought to be a valid ref-
erence time.
ing or setup purposes. This may be the case e.g., while waiting for a GNSS
antenna to be installed.
chronize computers on a network, with no need for traceable UTC-based
timing.
reboot of VersaSync, while waiting for the primary reference (e.g., GNSS)
to become valid. To this end, in the
box Synchronize to Battery Backed Time on Startup
AND the User/User reference 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.
page 176.
green
User/User reference is not traceable to a valid ref-
User time bears the risk of inadvertently
Edit System Time
status lights) the User/User reference, the hand-
CHAPTER
window, the check-
must be checked,
"The "Local
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3 VersaSync User Manual Rev. 12