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9.3 Trigger Control
The trigger mode can be controlled from the
“trigger”
tab in the GUI. The three trigger mode
options are listed and described below. The pixel clock speed and readout mode options are
also stated. All these controls can be seen from Figure 17.
9.3.1 Live ITR (Integrate then Read)
In this mode, the camera uses an internal trigger to start the integration and readout of the
sensor. The camera will run with continuous integration and readout of the sensor. This
mode is used to capture a continuous sequence of images. The camera will immediately
trigger the start of a new integration period when the previous image readout has completed.
9.3.2 Live FFR (Fixed Frame Rate)
If the fixed frame rate mode is enabled, then the camera will generate an internal trigger
signal at a user programmable frame rate. The Frame rate user input box under “Exposure &
Rate” becomes active when this mode is selected, giving the user control to program the
frame rate.
9.3.3 Ext. Triggered (External Trigger)
If this mode is enabled, then the camera will use an external trigger to start the integration
and subsequent readout of the sensor. Enabling this mode will also make the
“trigger
polarity”
control become active. Selecting
“Rising Edge”
means that the rising edge of an
incoming trigger pulse is used to trigger the start of integration. Selecting
“Falling Edge”
means that the falling edge is used to trigger the start of integration.
9.3.4 Btn. Triggered (Snapshot Trigger)
Selecting this mode will give the user an option to capture a single exposure. When this
mode is enabled, the
“single exposure”
control will become active and the customer can
manually trigger an exposure by clicking it.
9.3.5 Pixel Readout Clock Speed
The pixel readout clock speed can also be selected from this tab. By default, the readout
speed will be set to the fastest 2MHz. The user can change to a speed of 75kHz, which
offers the lowest readout noise.