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１
6. External trigger signal timing
6-1. Pulse width control
1) Field on Demand (SHUTTER : EXT TRIG, EXT TRIG : MODE1, CCD MODE : FIELD)
The exposure time is controlled by external trigger pulse width. One field of the picture is
obtained after SYNC reset. However, the exposure time must not be below 1/1,000s, even the
minimum trigger pulse width.
EXT TRIG GER
V.SYNC
SHUTTER PULSE
READO UT PULSE
EXPO SURE TIME
VIDEO O UT
W E PULSE
*Possible to change polarity
EXT TRIG GER
VD
HD
SHUTTER PULSE
READO UT PULSE
EXPO SURE TIME
VIDEO O UT
HD
SHUTTER PULSE
READO UT PULSE
EXPO SURE TIME
VIDEO O UT
DWN
・ ・
DSGN
・ ・
CHKD
・ ・
APPD
・ ・
１
２
m ore than 64
SYNC reset
SYNC reset
2 to 3H delay
2.5 to 3.5H delay
HV-D27A/HV-D37A
Color Camera
Hitachi Kokusai Electric Inc
Tentative
Specification
(8/17)
２
３
μ
s
*Possible to change polarity
EXPO SURE TIME
= TRIG . PULSE W IDTH + MAX 64
NTSC:20H
SYNC reset
PAL :25H
Tokyo Japan
３
４
Ｂ
μ
s
N T S C
Ｅ
P AL
Ｆ
Ａ
Ｃ
Ｄ
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