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Appendix B Timing and Trigger Sources Signal Definitions
Trigger Signal Definitions
mA-1302/mA-1305 AXIe Chassis Operation Manual Rev. D0
Page B-2 April 2020
Trigger Signal Definitions
Table B-1 Trigger Signals
Trigger Label Trigger Definition
EXT_TRIG_IN The System Trigger Input is a 3.3V, adjustable threshold,
LVCMOS (Low Voltage Complementary Metal Oxide
Semiconductor) signal that is externally driven from the
Chassis Trigger Input Connector to the Trigger Routing
Matrix.
EXT_TRIG_OUT The System Trigger Output is a 3.3V LVCMOS signal driven
from the Trigger Routing Matrix to the Chassis Trigger
Output Connector.
TIMESTAMP_TRIG API Programmable trigger: trigger is programmed via API to
occur at specified time events.
TRIG# (0:11) Bidirectional MLVDS (MultiPoint Low Voltage Differential
Signal) trigger pairs that are shared between backplane
instruments and the Trigger Routing Matrix.
STRIG# (1:5) LVDS Star Trigger pairs driven by the Embedded System
Module (ESM) to individual instrument slots.
SYNC_TRIGGER A low skew Trigger signal that can be used for trigger and
timing synchronization purposes.
SW_TRIG_IN /
SW_TRIG_OUT
The Software Trigger signal is driven by the ESM via API
commands.