User_Manual-PILATUS-V1_2.doc 51/57
13 External Triggering
External triggering can be seperated into three different modes:
• External Trigger: triggers a predefined series of commands after the
detector receives a positive edge
• External Multitrigger: triggers each exposure with an external pulse, but
times the exposure using the internal timer
• External Enable: gates the detectors images on the positive signal
coming to the detector
All these commands apply to camserver
13.1 Command list
Variables Description
nimages Number of images
Sets the number of images to be taken after the trigger
e.g. :“ni 2” for two images
exptime Exposure time
Sets the exposure time for each image
e.g. “expt 1” for a one second exposure
expperiod Exposure period
Sets the period of time allocated to take an exposure and
readout the image.
e.g. “expp 2” for a one second period therefore readout
time is (expp-expt), the minimum readout time is 3ms
delay Delay
Sets the time to wait after the trigger to take the first
image.
e.g. “delay 1” a one second delay between the trigger
and first image
Exttrigger [image
name]
External trigger
Starts the external trigger mode and waits for the trigger
ExtMtrigger [image
name]
External multi trigger
Starts the external multi trigger mode and waits for the
trigger
Extenable [image
name]
External enable
Starts the external enable mode and waits for the gate
pulse
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