Hitachi HV-F31F - Manual (Page 58)

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External trigger operating mode: Mode 1
When external trigger signal is high
active, after the trigger signal rise, the
flash signal start/end can be set to
determine the flash time.
At the flash signal falling edge, the
internal VD signal is reset and the video
data are transmitted. 1 Frame = 66.7ms 15FPS
External Trigger
(High active)
A
Internal VD
minimum period = 1V
Internal Video
A B C D
Buffer Memory Write
Delay: 1250us
A
VD : 3H = 186us
A
1Frame = 133.3ms
7.5FPS
DATA transfer
(YUV 16bit)
The highest transmission
speed: 136ms
Exposure
Internal VD
Internal Video
Buffer Memory Write
DATA transfer
Internal HD
1H(cam)=
62us
3H(cam) = 186us
A
A
Delay: 1250us
DATA transfer START: 3.0ms
External Trigger
6 to 7H(cam) = 373 to 435us
Exposure
21us
Frame reset
Trigger pulse width > 65us
4.0us
20H(cam) = 1243us
blank : 26 to 27H = 1678us