Omicron Lab OTMC 100 Series User Manual page 45

IEEE C37.238 grandmaster
ID
Total time inaccuracy
Local time inaccuracy [ns]
Network time inaccuracy
[ns]
7.2.2.4 Time pane
The Time pane displays parameters for the time that is currently distributed in the PTP network or
domain in which OTMC 100 participates (for example, epoch related parameters like UTC offset or
leap second information), and parameters of the time source currently used. If OTMC 100 is the
current grandmaster of the network, the data in this pane represent its own time source. If OTMC 100
is in passive state, this pane lists the parameter values of the current grandmaster clock in the network
or domain. The data listed here represents the Time Properties Data set specified in IEEE 1588-2008,
clause 8.2.4.
UTC offset
UTC offset valid
OMICRON
Displays the grandmaster identity announced in IEEE C37.238 TLV. By
sending this ID, the current grandmaster clock identifies itself as a valid
Power profile grandmaster. A Power profile slave will ignore all masters
that do not provide a setting for this field. Only available for PTP profiles
Power (C37.238-2011) and Power (C37.238-2017) (OTMC 100p only).
This parameter is set in the
IEEE C37.238 totalTimeInaccuracy provides a mechanism using the
profile-specific IEEE_C37_238 TLV defined in clause 6.2 for applications
to determine whether the time inaccuracy in the delivered time is
acceptable. The total time inaccuracy comprises the sum of the following
three values:
- Grandmaster time inaccuracy
- Distribution time inaccuracy
- Source time inaccuracy
These three items are summed in the totalTimeInaccuracy field. This
field is initialized by the grandmaster to the grandmaster time inaccuracy
plus the source time inaccuracy, and then incremented by TCs and BCs
Only available for PTP profile Power (C37.238-2017) (OTMC 100p only).
Displays the maximum time inaccuracy in ns that the device contributes
to the network time inaccuracy. See IEEE C37.238-2011, clause 5.13.
Only available for PTP profile Power (C37.238-2011) (OTMC 100p only).
This parameter is set in the
Displays the network time inaccuracy in ns to be transmitted in
IEEE C37.238 TLV. See IEEE C37.238-2011, clause 5.13. Only
available for PTP profile Power (C37.238-2011) (OTMC 100p only).
This parameter is set in the
Displays the UTC offset. In PTP systems whose epoch is the PTP
epoch, the value is the offset between TAI and UTC in seconds;
otherwise the value has no meaning. See IEEE 1588-2008, clause
8.2.4.2.
True indicates that the value of the UTC offset parameter is valid.
Otherwise false. See IEEE 1588-2008, clause 8.2.4.3.
The OTMC 100 web interface
PTP configuration (see page 62).
PTP configuration (see page 62).
PTP configuration (see page 62).
45