3. Key Features
DXC-990/990P, DXC-390/390P Sales Manual
–
7
■ Electronic Shutter Function
• The variable electronic shutter built into the CCD imager enables the DXC-990/990P and DXC-390/390P
to capture clear images of moving objects. The shutter speed can be manually selected from
a wide range of speeds (up to 1/100000).
• The Flickerless mode allows you to obtain flickerless images even in fluorescent lighting conditions.
• The Clearscan
TM
mode reduces the horizontal bands that appear in computer displays when shooting
the display with a conventional video camera.
■ Long Term Exposure Function
• When shooting very dark objects or objects in dark lighting conditions, you can manually set the
shutter speed to 1/60 of a second or more to allow more light to accumulate on the CCD sensors,
resulting in enhanced sensitivity.
• By synchronizing the WEN pulse of the camera signal output with an external memory unit such as
a frame grabber unit/board, it is possible to obtain a still picture video.
<Shutter speed calculation of Clearscan mode>
Example: When the value is set to 250 H
(NTSC) 250 63.56 us (1 H) + 34.78 us (constant)
= 15924.78 us
= 1/62.8 s
(PAL) 250 64 us (1 H) + 35.6 us (constant)
= 16035.6 us
= 1/62.4 s
<Shutter speed calculation of LTE mode>
Example: When the value is set to 5 FRM
(NTSC) 5 1/30 = 0.167 s
(PAL) 5 1/25 = 0.2 s
DXC_990/390.qxp 01.3.2 3:46 PM Page 7
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