use the System Time as a reference to NTP, since this provides NTP with the most accurate ref
erences. This mode is called
Stratum 1
operation, since NetClock operates as a
Stratum 1
NTP
server.
To configure
Stratum 1
operation for NetClock:
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.
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
aable 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 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 correlation, 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 NetClock you are con
figuring a
Stratum 2
server, since the other server is Stratum 1.
To configure
Stratum 2
(or greater) operation for NetClock:
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.
104
CHAPTER
2
•
NetClock User Reference Guide
Rev.
16
2.15 Configuring NTP
Summary of Contents for NetClock 9400 Series
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Page 42: ...BLANK PAGE 1 11 Regulatory Compliance 26 CHAPTER 1 NetClock User Reference Guide Rev 16...
Page 160: ...BLANK PAGE 2 17 Configuring Outputs 144 CHAPTER 2 NetClock User Reference Guide Rev 16...
Page 238: ...BLANK PAGE 3 5 Managing the Oscillator 222 CHAPTER 3 NetClock User Reference Guide Rev 16...
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