Trigger Operation And Timing Chart; Hv-F31Cl / Hv-F31Cl-S1 - Hitachi HV-F31CL Operation Manual

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-F31CL / HV-F31CL-S1

(1) Pre-select exposure mode: Mode 0
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.
(Note) Exposure setting has following 2 types.
(a) Preset exposure mode
Exposure delay A: 2 us to 263.96 ms (Variable)
Flash pulse width B: 6 us / 46 us / 246 us (Selectable)
(b) Variable exposure mode
Exposure delay A: 2 us (Constant),
Flash pulse width B: 4 us to 263.96 ms (Variable)
41
External Trigger
minimum period = 1V
Exposure
A
Flash Pulse Output
Internal VD
Internal Video
VD : 3H=126us
blank : 18 to 19H = 801us
DATA transfer
External Trigger
Internal HD
Internal VD
6 to 7H(cam) = 253 to 295us
A
Exposure delay A
Exposure
4.0us
Flash Pulse Output
Internal Video
DATA transfer
DATA transfer START: 0.85 to 265.1ms
1Frame = 33.3ms 30FPS
A B C
A
1H(cam)=
42us
3H(cam)=126us
Frame reset
30us
Flash pulse width B
B
12H(cam)=506us
D
A