User manual

Section 11: LXI Class B Triggering (IEEE-1588) Series 3700 System Switch/Multimeter Reference Manual
11-4 3700S-901-01 Rev. C / July 2008
Use ptp.enable() (on page 13-227) to enable IEEE-1588 on the Series 3700.
The IEEE-1588 protocol then determines the master clock. The IEEE-1588
indicator on the front panel of the Series 3700 updates to display the IEEE-1588
status.
If the indicator is off, then IEEE-1588 is disabled or the device is not
connected to a working network.
If the network is not working, then the LAN indicator also blinks. If the
indicator is solidly on, the IEEE-1588 is successfully enabled and
synchronized, and the Series 3700 is a slave clock.
If the network is not working, then the LAN indicator also blinks. If the
indicator is solidly on, the IEEE-1588 is successfully enabled and
synchronized, and the Series 3700 is a slave clock.
If the indicator blinks once per second, then IEEE-1588 is successfully
enabled and synchronized, and the Series 3700 is the master clock.
If the indicator blinks once every two seconds, then IEEE-1588 is
successfully enabled and synchronized, and the Series 3700 is the
grandmaster clock.
You can also use ptp.synchronized (on page 13-228) to determine if the
Series 3700 is a master or slave on the LAN.
NOTE ptp.enable is a non-volatile setting. Therefore, if you power off a
Series 3700 with IEEE-1588 enabled and then re-power the Series
3700 on a different network, it attempts to synchronize with any other
IEEE-1588 enabled devices on that new network. You do not need to
re-enable IEEE-1588.