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Note: Internet Time Servers should be configured as NTP Servers and not

as NTP Peers.

If VersaSync has no valid Timing System Reference, NTP Server or NTP Peers, the NTP

Stratum value is automatically downgraded to Stratum 15. This ensures that its NTP cli-

ents will no longer use this VersaSync unit as a time reference.

Configuring "NTP Stratum 1" Operation

When the Timing System references of your VersaSync are normally available (rather than

being unavailable most of the time e.g., in areas with poor GNSS reception), it is advisable

to use the System Time as a reference to NTP, since this provides NTP with the most accur-

ate references. This mode is called Stratum 1 operation, since VersaSync operates as a

Stratum1 NTP server.

To configure Stratum 1 operation for VersaSync:

Navigate to MANAGEMENT > NETWORK: NTP Setup:

Click the GEAR icon in the NTP Services panel.

The Edit NTP Services window will display. Click the Stratum 1 tab.

4. Check all of the three options:

Enable Stratum 1 Operation

Checking this option will cause the NTP Service to use the System Time

provided by the Timing System input.

Prefer Stratum1

This option configures NTP to “weigh” the Timing System input heavier than

input from other NTP servers for its selection (The Timing System 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 desir-

able NOT to prefer the Timing System over an NTP reference, 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 Tim-

ing 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 correlation, NTP performance will be degraded.

In such a scenario, it is best NOT to use the System Time’s 1PPS as a ref-

erence.

106

CHAPTER 2 • VersaSync User Manual Rev. 7.0

2.8 Configuring Network Settings

Orolia VersaSync User Manual

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