User`s manual

VTI Instruments Corp.
42 EX7000 Series Web Page Operation
F
IGURE 4-10: LXI SYNCHRONIZATION WEB PAGE
• IEEE 1588 Parameters
o PTP Grandmaster Clock MAC: indicates the MAC address of the device on the
network to which all other IEEE 1588 compliant devices are synchronized.
o PTP Parent Clock MAC: indicates the MAC address of the device to which the EX7000
is synchronized. On a LAN that consists of multiple subnets, this indicates the MAC
address of the parent clock on that particular subnet.
o PTP State: indicates whether the EX7000 is a master, slave, faulty, disabled, passive, or
unlocked.
o Current PTP Time: indicates the number of seconds since midnight January 1, 1970
UTC (coordinated universal time).
o Current Local Time: indicates the date and time (in 24-hour format).
o 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.
Value
Clock Source
UTC Synchronization
ATOM
UTC Atomic Clock
Less than 100 ns
GPS
GPS Receiver
Less than 100 ns
NTP
Network Time Protocol
Less than 50 ms
HAND
Manually/Automatically Set
Less than 10 s
INIT
User Defined
Not specified
DFLT
None
None
TABLE 4-2: UTC GRANDMASTER CLOCK IDENTIFIERS
o Current Variance of Parent: this function not currently supported by the EX7000.
o IEEE 1588 Domain: indicates the instrument’s PTP subdomain. Typically, this indicator
is _DFLT.
• LXI Module to Module Parameters
o LXI Domain: an 8-bit number, 0 to 255, that indicates the domain the EX7000 is using
for LAN events. All events sent by this device will include this data. Likewise, the device
will only accept events that include the same LXI Domain data.
• Wired Trigger Parameters
o Wired-OR Bias: indicates whether the Wired-OR bias for each Trigger Bus channel
(LXI0 through LXI7) is enabled or disabled.