Keysight U2781A, User Manual

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Features and Functions 2
Keysight U2781A User’s Guide 29
External Trigger In (Star Trigger)
The star trigger bus offers a very high performance or precise synchronization
between modules. The star trigger bus is a dedicated trigger line between the
External Trigger Input and USB slots. This trigger signal is sent from external to
each slot through a 1-to-6 CLK buffer. The slot-to-slot skews are minimized to
ensure that trigger signal reaches all six slots simultaneously. Refer to the
following figure for the star trigger bus architecture illustration.
To set star trigger as the module trigger source, the following SCPI command is
sent to the modules:
OUTP:TRIG:SOUR STRG
Figure 2-3 Block diagram of the 10 Mhz Reference Clock and External
Trigger In
Star Trigger Bus