User manual

Series 3700 System Switch/Multimeter Reference Manual Section 11: LXI Class B Triggering (IEEE-1588)
3700S-901-01 Rev. C / July 2008 11-7
LXI event log
The LXI event log of a Series 3700 monitors all LAN triggers that the instrument
receives or generates. The LXI event log has nine comma-delimited fields.
Below is an example entry to a LXI event log and a description of the log fields
in order of appearance.
"17:26:35.690 10 Oct 2007, LAN0, 192.168.1.102, LXI, 0,
1192037132, 1192037155.733269000, 0, 0x0"
Field
#
Field Value
Field Description
1
“17:26:35.690 10 Oct 2007”
Formatted UTC time in 24-hour format including
fractional seconds.
2
“LAN0”
Event identifier.
NOTE This event identifier is zero-based (LAN0-
LAN7). When specifying the LAN trigger
using lan.trigger[N], the minimum
value for N is 1. Therefore LAN0 to LAN 7
corresponds to lan.trigger[1]
through lan.trigger[8], respectively.
3
“192.168.1.102”
IP address of the device that issued the LAN trigger.
4
"LXI"
LXI version identifier. Currently only LXI is defined.
5
“0”
LXI Domain number.
6
“1192037132”
Sequence number provided by the device that issued
the LAN trigger. This number is incremented after
generation of each LAN trigger.
7
"1192037155.733269000”
PTP time formatted as a floating point number.
8
“0”
The "overflow" from PTP seconds. Currently, this is “0”.
Also referred to as IEEE-1588 Epoch.
9
"0x0"
Hex value of the flag field, which is the logical OR of
several conditions (error=1, retransmission=2,
hardware=4, acknowledgement=8).
Example applications of IEEE-1588 in Series 3700-based
systems
This section discusses examples of a few applications that are possible using
IEEE-1588.