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RMV Operations Manual Revision Copyright illunis LLC, 2014
Page 61
4.3: Exposure:
Asynchronous Reset
The trigger modes may be used in a async
reset where the RMV is operated in a free run mode
and is reset by the trigger signal.
In this mode the camera runs as if in FRM
and waits for a trigger.
Once the trigger signal is recognized the
camera “resets” by flushing the internal CCD’s and
erasing the photo diodes. The selected triggered im-
age is then exposed and readout.
The camera then returns to FRM (free run mode).
Serial Commands
Target
Index
Command
R/W
Description
04
05
Readout Mode Select
W
Async Reset Enabled
04
06
Readout Mode Select
W
Async Reset Disabled
04
07
Readout Mode Select
W
Runs Valid Enabled
04
08
Readout Mode Select
W
Runs Valid Disabled
Quick FAQ’s:
►Some camera manufactures call their trigger mode
Async reset as they do not have different trigger
and free run timing.
►
If the Async Reset mode is active in free run
mode then the Free Run Synchronize mode is
active.
The camera will sync to the trigger signal.
►The RUN VALS option controls the output of FVAL
and LVAL during async reset mode.
► Async Reset mode and Runs Valid disabled are
useful with auto exposure to allow the AE to run
and still allow the use of triggered images.
►The strobe signal can be used to determine frame
timing.
Trigger
FVAL
Read Out N-2
Exposure N-1
Exposure
Read Out
Strobe
Read Out N-1
Bad
Triggered Exposure
Triggered Read Out
Bad Data
Exposure N+1
Read Out N+1
Exposure N+2
Trigger
FVAL
Read Out N-2
Exposure N-1
Exposure
Read Out
Strobe
Read Out N-1
Bad
Triggered Exposure
Triggered Read Out
Bad Data
Exposure N+1
Read Out N+1
Exposure N+2
Async Reset Mode with Run Valid Disabled
Async Reset Mode with Run Valid Enabled