Hitachi HV-F31F - Manual (Page 55)

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Trigger operation and timing chart
External trigger refer to a function for picking
up rapidly moving objects by applying a trigger
pulse input. It is possible to pick up an image
with various timing.
1. HV-F31F
(1) External trigger operating mode: Mode 0
When external trigger signal is high active,
light pulse begins at the rising edge of the
trigger signal and ends at the falling edge.
At the trigger signal falling edge, the
internal VD signal is reset and the video
data are transmitted.
External Trigger
Internal VD
6 to 7H(cam) = 253 to 295us
Exposure
1H(cam)=
42us
Frame reset
Flash Pulse Output
Internal HD
External Trigger
A
Internal VD 1Frame = 33.3ms 30FPS
Internal Video
A B C D
Buffer Memory Write
Delay: 1250us
A
VD : 3H=126us
A
1Frame=66.6ms 15FPS
DATA transfer
(YUV 16bit)
The highest transmission
speed: 69ms
Exposure
Flash Pulse Output
Internal Video
Buffer Memory Write
DATA transfer
A
A
Delay: 1250us
DATA transfer START: 2.1 to 4.3ms
3H(cam)=126u s
start : 2 to 2000 us
set 556 ns step
width : select 3 state
(NARROW:40us, MIDDLE:80us, WIDE:280us)
30us 4.0us
blank : 18 to 19H = 801us
12H(cam)=506u s
minimum period = 1V