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

External Trigger

 

 

 

 

 

minimum period = 1V

 

 

 

Exposure

A

 

 

 

Flash Pulse Output

 

 

 

 

Internal VD

1Frame = 33.3ms

30FPS

 

Internal Video

A

B

C

D

 

 

VD : 3H=126us

 

 

 

 

blank : 18 to 19H = 801us

 

 

Buffer Memory Write

A

 

 

 

DATA transfer

Delay: 1250us

 

 

 

A

 

 

 

(YUV 16bit)

 

The highest transmission

 

 

 

 

 

 

1Frame=66.6ms

15FPS

speed: 69ms

 

data are transmitted.

External Trigger

Internal HD

1H(cam)=

42us

Internal VD

Frame reset

3H(cam)=126u s

 

 

6 to 7H(cam) = 253 to 295us

 

41

start : 2 to 2000 us set 556 ns step

Exposure

4.0us

Flash Pulse Output

Internal Video

Buffer Memory Write

DATA transfer

30us

width : select 3 state (NARROW:40us, MIDDLE:80us, WIDE:280us)

12H(cam)=506u s

Delay: 1250us

A

 

DATA transfer START: 2.1 to 4.3ms

A

 

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Hitachi HV-F31F, HV-F22F operation manual Trigger operation and timing chart