First Light C-RED 3 - Trigger Selection; Software Trigger; External Trigger

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The triggered acquisition feature initially developed only supports the generation of the
acquisition trigger by sending a command using the CLI, described in 9.4.2
Firmware 1.1.0 introduces the capability to generate the acquisition trigger using FPS_Tint_in signal
on synchronization Lemo® connector or using one camera link control signal (C-RED 3 CL only).
Trigger selection
On firmware version 1.1.0 and above, the origin of the acquisition trigger can be set using the “set
swsynchro source” commands.
The “set swsynchro source swtrig” command selects the software trigger as the source of
the triggered acquisition. This is the default camera configuration.
The “set swsynchro source external” command selects the external trigger as the source of
the triggered acquisition.
Software trigger
The generation of the software trigger is done using the “swtrig” command.
On firmware versions 1.1.0 and above, the acquisition can also be aborted using the “swtrigabort”
command. It is useful for sequences with long integration time.
External trigger
When the source is set to “external”, the acquisition can be controlled using the FPS_Tint_in signal
on the synchro connector available on all C-RED 3 models. On C-RED 3 CL model, the acquisition can
also be controlled using one of the camera link control signals available on the camera link connector
#1.
The selection between the different external source is done using one of the following commands:
“set extsynchro source external”: selects FPS_Tint_in_ signal on Lemo® connector as input
signal
“set extsynchro source cc1”: selects Camera Link/CC1 as input signal
“set extsynchro source cc2”: selects Camera Link/CC2 as input signal
“set extsynchro source cc3”: selects Camera Link/CC3 as input signal
“set extsynchro source cc4”: selects Camera Link/CC4 as input signal
When standard extsynchro polarity is selected, the acquisition is started on the rising edge of the input
signal. The input signal must remain high during the whole duration of the acquisition burst. Lowering
input signal whereas acquisition is not complete aborts the current acquisition.
When reversed extsynchro polarity is selected, the acquisition is started on the falling edge of the input
signal. The input signal must remain low during the whole duration of the acquisition burst. Raising
input signal whereas acquisition is not complete aborts the current acquisition.