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Hitachi Kokusai Electric Inc
Tokyo Japan
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HV-D27A/HV-D37A
Color Camera
Tentative
Specification
(
9/17
)
2) Frame on demand (SHUTTER : EXT TRIG, EXT TRIG : MODE1, CCD MODE : FRAME)
When an external flash trigger signal is applied, the V SYNC is reset and one frame of the
picture is obtained. The exposure time is controlled by the external trigger pulse width and SYNC reset
timing. Also, the SYNC reset timing from the flash timing can be adjusted by the camera menu
setting.
Note: When the flashlight is not used, the even and odd video signal levels are difference as shown
to the following timing chart.
V.SYNC
SHUTTER PULSE
EXT TRIG
(EXT FLASH TRIG)
ODD READOUT
PULSE
EVEN READOUT
PULSE
EVEN
ODD
VIDEO OUT
EVENODD
WE PULSE
SYNC resetSYNC reset
*Possible to change polarity
More than 64μs
More than 2 fields
The delay time from back ed ge of EXT TR IG PULS E
to V sync reset is controlled by menu setting value
2H～20H (NTSC), 2.5H～20.5H (PAL).
*Possible to change polarity
EXT TRIG PULSE
V.SYNC
SHUTTER PULSE
ODD READOUT
PULSE
EVEN READOUT
PULSE
EVENODD
VIDEO OUT
EVENODD
WE PULSE
SYNC resetSYNC reset
More than 2 fields
EXPOSURE
TIME
ODD FIELD
EVEN FIELD
More than 64
μ
sec
*Possible to change polarity
*Possible to change polarity