Arbiter Systems 1092A, Operation Manual

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152 Options List
•
Peer Delay Request – allows the requesting device to calculate the propagation delay for the
individual segment.
•
Announce receipt timeout – specifies the number of announceInterval that has to pass
without receipt of an Announce message before the occurrence of the event AN-
NOUNCE RECEIPT TIMEOUT EXPIRE.
• Delay mechanism – communication delay, end to end or peer to peer.
•
Protocol – UDP IPv4, UDP IPv6 or Layer2.
•
Clock class value – used to advertise the quality level of the clock. A GPS clock is given the
value of 6.
• Clock accuracy – 22 is used for clock accuracy to within 250 ns.
•
Priority 1 – used in the execution of the best master clock algorithm.
•
Priority 2 – used in the execution of the best master clock algorithm.
NTP Status Page
To view the NTP service, select NTP tab on the left and the Status tab above. Figure C.27
illustrates the status of NTP.
Option 34 Network Time Module
Status Configure
NTP
PTP
SNMP
Clock
Network
System
Support
Logout
Authentication
NTP
Root Dispersion
Offset
Frequency
System Jitter
Clock Jitter
Clock wander
Stratum
Running
0.420
-0.063
1.337
0.009
0.008
0.001
1
Figure C.27: NTP Status Page
NTP Terms
•
NTP – either running or stopped.
•
Root Dispersion – (or dispersion) represents the maximum error of the local clock relative to
the reference clock.
•
Offset – (or clock offset) represents the amount to adjust the local clock to bring it into
correspondence with the reference clock.
•
Frequency – frequency offset (PPM) relative to hardware clock.
•
System Jitter (psi) – is defined as the root-mean-square (RMS) average of the most recent
offset differences, and it represents the nominal error in estimating the offset (of the system).