ACQUIRING DATA
iKon-L SECTION 5
Page 61
IMPORTANT NOTE FOR ALL EXTERNAL TRIGGERING FUNCTIONS: If you have a shutter connected
and are using External triggering, you must ensure that the shutter is OPEN before the optical signal
you want to measure occurs.
In External mode once you issue a data acquisition command, data will not be acquired until your system has
received an External Trigger signal generated by an external device (e.g. a laser). The External Triggering
signal is fed to the Ext Trig SMB connector on the rear of the detector.
5.5.3 - Fast External
Normally, when using External Trigger the system will only enable the triggering of the system after a
complete Keep Clean Cycle has been performed. This is to ensure that the CCD is always in the same known
state before it is triggered. This is particularly important when the system is in Accumulation or Kinetics mode.
In cases were repetition rate is paramount, and slight variation in the base background level is less important,
it is possible to remove this restriction by using Fast External triggering.
With External Start triggering, once you issue a data acquisition command, data will not be acquired until
your system has received an external trigger signal generated by an external device. The system will then
continue to acquire data based on user options set within the Acquisition Dialog.
This means that an External Start Trigger could be used to commence acquisition of a Kinetic series, but with
the parameters of that series being controlled by internal software options. The External Start trigger signal is
fed to the camera head via the Ext Trig SMB on the back of the camera.
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