VTI Instruments EX1000A, User Manual

Page: 90 / 320

VTI Instruments Corp.
90 EX10xxA Web Page Operation
Using the Manual Time Setting
F
IGURE
5-8: T
IME
C
ONFIGURATION
P
AGE
- M
ANUAL
If a PTP master or an SNTP server is not available, time can be configured manually by the user by
selecting
Manual in the Time Source drop menu. Note, manually set time sources are not very
accurate and that this configuration should only be used if timestamp accuracy is not vital to a
measurement.
To use a manually set time source:
1) Select Manual from the Time Source field. The page will change so that it can be
configured.
2) Select the Set Time checkbox.
3) Enter the required data into the Date and Time fields that appear. Note that the Time field
should be entered using the 24-hour format.
4) Click the Submit button to begin using the manual time source.
LXI Synchronization
This status page displays the EX10xxAs IEEE 1588 status. The PTP Grandmaster Clock MAC
field indicates the MAC address of the device on the network to which all other IEEE 1588
compliant devices are synchronized. The
PTP Parent Clock MAC field identifies the MAC address
of the device to which the EX10xxA is synchronized. On a LAN that consists of multiple subnets,
this indicates the MAC address of the parent clock on that particular subnet. The
PTP State field
shows the EX10xxA state: master, slave, faulty, disabled, passive, or unlocked.
Two types of wall clock time are available as well. The Current PTP Time field indicates the
number of seconds since midnight January 1, 1970 UTC (coordinated universal time). The local
time can be viewed by observing the
Current Local Time field.
The Grandmaster Traceability to UTC indicates how the grandmaster is synchronized to the
UTC. The values provide an indicator of how closely synchronized the grandmaster is to UTC time
(see Table 5-3). The Domain field displays the instrument’s PTP subdomain. Typically, this
indicator is _DFLT. The final field,
Wired-OR Bias, indicates whether the Wired-OR Bias for each
LXI trigger line (LXI0 through LXI7) is enabled or disabled.