Photron Fastcam SA6 User Manual page 111

Random Mode
In random mode, only a predetermined number of frames are recorded after the trigger is input each
time.
Every time the trigger is input, the predetermined numbers of frames are saved.
This mode is suitable for a phenomenon that happens irregularly but a trigger can be activated each
time to match its critical timing.
The frame count that can be recorded for 1 trigger input can be set from 1 frame to the maximum
recordable frame count, in 1 frame increments.
Example: When set to record a frame count of 1000 frames
Immediately after clicking [Trigger In], the specified frame count of high-speed images is recorded.
Record
Record Ready
When recording in random mode, the settings below must be made in advance.
1. Click the [Trigger Mode] button and select "Random".
2. Set the frame count to record for each trigger input. Enter the desired value in "Random
frames" and click the [Close] button.
Trigger In
Specified 1000 frames recorded
101
Recording
Photron FASTCAM Viewer