Keysight Technologies M9010A - Trigger Bus Segments; Trigger Line Reservations and Routing

Keysight PXIe Chassis Family User Guide 85
Chassis Trigger Lines Configuring the PXI Trigger Bus
Trigger Bus Segments
The PXI chassis trigger bus consists of eight trigger lines spanning the chassis
backplane connectors.
– For the M9010A, the trigger lines are divided into two trigger bus
segments, labeled Segment 1 and Segment 2. Segment 1 covers chassis
slots 1 through 5 and Segment 2 covers slots 6 through 10.
– For the M9018B and M9019A, the trigger lines are divided into three
trigger bus segments, numbered 1 through 3. Segment 1 covers chassis
slots 1 through 6, Segment 2 covers slots 7 through 12, and Segment 3
covers slots 13 through 18.
By default, when you power-on the chassis, these trigger bus segments are
isolated from one another. Only the modules inside a given segment are able to
detect a trigger signal originating from another module in that same segment.
Trigger Line Reservations and Routing
Trigger Reservations: PXI chassis have trigger lines that are available to all of the
cards in a chassis. Sometimes, applications may need to reserve one or more of
the trigger lines, permanently or for a fixed time, for use by that application only.
This is a trigger reservation. Applications must heed the trigger reservations made
by other clients and avoid operating them.
Trigger Routes: Trigger lines in bus segments are independent unless the trigger
lines are explicitly connected between segments. This connection is a trigger
route. For each trigger line in a segment, you can enable buffers that to allow a
trigger signal on that line to flow out of one segment and into an adjacent
segment. A Trigger Route always has a source segment and a destination
segment.
Three trigger bus segments provide eight possible VALID trigger bus routes that
can be configured on any one trigger line. The following graphic shows all eight
trigger lines; each line is showing a different route so that all eight may be seen.
Any of these combinations can be applied to each of the eight trigger lines
PXI_TRIG[0:7].
Attempting to drive a trigger bus line from two different trigger
bus segments may damage the trigger bridges between the
segments.