Safran SecureSync 2400 - Configuring NTP Stratum Synchronization

Prefer Stratum1
This option configures NTP to “weigh” the Timing System input heav-
ier than input from other NTP servers for its selection (The Timing Sys-
tem inputs are normally more accurate than other NTP servers).
However, if the Timing System inputs are not normally available (such
as with intermittent GNSS reception or no other inputs are available),
it may be desirable NOT to prefer the Timing System over an NTP ref-
erence, in which case this box should not be checked.
Enable Stratum1 1PPS
This option determines whether or not NTP uses the 1PPS input from
the Timing System. The 1PPS input to NTP needs to correlate with its
“Time” input. If the Time and PPS inputs are originating from the same
source, they will be correlated. However, if the time is originating
from another NTP server, but the 1PPS is being derived by the Timing
System, the two inputs may not always correlate. Without this cor-
relation, NTP performance will be degraded. In such a scenario, it is
best NOT to use the System Time’s 1PPS as a reference.
5.
Click the Submit button.
2.15.7.3 Configuring "NTP Stratum Synchronization"
NTP Stratum Synchronization refers to the concept of using a different NTP
Server or Peer as your primary reference (instead of e.g., GNSS). This will make
the SecureSync you are configuring a Stratum2 server, since the other server is
Stratum1.
To configure Stratum 2 (or greater) operation for SecureSync:
1.
Navigate to MANAGEMENT > NETWORK: NTP Setup:
2.
Click the GEAR icon in the NTP Services panel.
3.
The Edit NTP Services window will display. Click the Stratum1 tab.
4. Uncheck all three options:
Enable Stratum 1 Operation
Uncheck this option. When the checkbox Enable Stratum1 is
unchecked, the system will always synchronize its .time to an NTP
server.
Prefer Stratum1
Uncheck this option to prevent SecureSync's NTP service from
“weighing” the Timing System input heavier than input from other
NTP servers. Thus, during normal operation, the time provided by the
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CHAPTER 2 • SecureSync 2400 User Manual Rev. 5.2
2.15 Configure NTP