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Keysight M9037A PXIe Embedded Controller User Guide 21

M9037A Functional Description Introduction

Software generated trigger to selected backplane trigger bus and front panel SMB trigger

connector

Trigger Source:

Software Generated

Trigger Destination:

One of the eight PXI backplane trigger lines and

the front

panel SMB trigger connector

IVI Driver Syntax (C#):

TriggerRouting.SetRoute (

AgPxiPcTriggerRouteEnum.AgPxiPcTriggerRouteSoftwareToTriggerBusAndExternal,

AgPxiPcPxiTrigEnum.AgPxiPcPxiTrig[0:7])

To set the software trigger level use the property:

TriggerRouting.SoftwareRouteTriggerState

For example, to create a negative-going edge ( ):

TriggerRouting.SoftwareRouteTriggerState = true;

TriggerRouting.SetRoute (

AgPxiPcTriggerRouteEnum.AgPxiPcTriggerRouteSoftwareToTriggerBusAndExternal,

AgPxiPcPxiTrigEnum.AgPxiPcPxiTrig[0:7]);

TriggerRouting.SoftwareRouteTriggerState = false;

Notes:

• A “software trigger” does not generate a trigger pulse. The SoftwareRouteTriggerState property in the IVI driver defines

a voltage level: True = 3.3V (asserted) and False = 0.0V (not asserted). To generate a pulse, you must toggle the state

of the SoftwareRouteTriggerState property; that is, set the property to one state, wait for the desired length of pulse,

and then set the property to the opposite state.

• You must select one of the eight PXI backplane trigger bus lines (TTL TRIG[0:7]). The software-generated trigger signal

will be active on the selected backplane trigger bus line and thus available to any PXI module installed in the chassis.

You cannot select only the front panel SMB trigger connector as a trigger destination without selecting one of the PXI

backplane trigger bus lines.

• TriggerRouting.Enabled returns “true” if and only if the trigger routing subsystem is enabled.

• Use TriggerRouting.RouteConfiguration to determine the current routing configuration.

• TriggerRouting.ResetRoute opens all trigger routing paths and disables the trigger routing subsystem. ResetRoute does

not alter the state of the SoftwareRouteTriggerState property. However, the

Reset method of the IVI driver resets the

state to the power-on default of True (3.3V).

• The front panel TRIG port connects directly to Trigger Bus Segment 1 on the PXIe chassis Backplane.

Keysight Technologies M9037A User Manual

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