FASTCAM-APX RS Hardware Manual
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ns from the input of a trigger signal to reset of the vertical sync signal, i.e. start of
recording.
Note: Technically, there is a slight time lag between the record timing (vertical sync)
and start of exposure, which is dependant on the framing rate being used (7.4 us
at 2,000 fps).
3.5.7. RANDOM CENTER Mode
In the RANDOM CENTER trigger mode, the camera records in the memory a preset
number of frames of images at each trigger, as in the case with the RANDOM mode.
The difference is that the RANDOM CENTER mode records the preset number of
frames before and after a trigger, while the RANDOM mode only records after a trigger.
This mode is useful to record images of events that take place at an unpredictable
timing with output of a trigger signal and that you wish to observe together with scenes
preceding the it. The number of frames to record at each trigger can be set any number
from 1 (one) up to the total number of available frames in the memory.
Setting the Number of Frames and Triggers for RANDOM CENTER Mode
Recording
The procedures for presetting the number of frames to record at each trigger and the
number of triggers to be given during a recording session are the same as the ones
used in the RANDOM trigger mode. See the previous Section 3.5.5 RANDOM Mode.
Setting the Number of Recordings for RANDOM CENTER Mode
Recording
The maximum number of triggers accepted in RANDOM CENTER mode operation is
ten (10) times. It is possible to end a series of recordings when a preset number of input
triggers finished. This subsection describes how to preset a number of trigger inputs.
1. Press the MENU key on the keypad to display the menu list.
