The Acquisition Start Trigger; Acquisition Start Trigger Mode; Acquisition Start Trigger Mode = Off; Acquisition Start Trigger Mode = On - Basler GIGE VISION ace acA640-100gm/gc Manual

Area scan cameras

Table of Contents

Image Acquisition Control

6.3

The acquisition start trigger is used in conjunction with the frame start trigger to control the

acquisition of frames. In essence, the acquisition start trigger is used as an enabler for the frame

start trigger.

When the acquisition start trigger is enabled, the camera's initial acquisition status is "waiting for

acquisition start trigger". When the camera is in this acquisition status, it will ignore any frame start

trigger signals it receives. If an acquisition start trigger signal is applied to the camera, it will exit the

"waiting for acquisition start trigger" acquisition status and enter the "waiting for frame start trigger"

acquisition status. In this acquisition status, the camera can react to frame start trigger signals and

will begin to expose a frame each time a proper frame start trigger signal is applied.

A primary feature of the acquisition start trigger is that after an acquisition start trigger signal has

been applied to the camera and the camera has entered the "waiting for frame start trigger"

acquisition status, the camera will return to the "waiting for acquisition start trigger" acquisition

status once a specified number of frame start triggers has been received. Before more frames can

be acquired, a new acquisition start trigger signal must be applied to the camera to exit it from

"waiting for acquisition start trigger". Note that this feature only applies when the Acquisition Start

Trigger Mode is set to on. This feature is explained in greater detail in the following sections.

There main parameter associated with the acquisition start trigger is the Acquisition Start Trigger

Mode parameter.

6.3.1

The Acquisition Start Trigger Mode parameter has two available settings: off and on.

6.3.1.1

When the Acquisition Start Trigger Mode parameter is set to off, acquisition start trigger signals are

generated internally by the camera and the user does not need to take any action regarding the

acquisition start trigger.

6.3.1.2

When the Acquisition Start Trigger Mode parameter is set to on, the camera is initially in a "waiting

for acquisition start trigger" acquisition status and cannot react to frame start trigger signals. You

must apply an acquisition start trigger signal to the camera to exit the camera from the "waiting for

acquisition start trigger" acquisition status and enter the "waiting for frame start trigger" acquisition

status. The camera can then react to frame start trigger signals and will continue to do so until the

number of frame start trigger signals it has received is equal to the current Acquisition Frame Count

parameter setting. The camera will then return to the "waiting for acquisition start trigger" acquisition

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