Sony DXC-990 Manual page 12

3. Key Features
Flicker Canceller
• The camera negates the flicker of fluorescent lights by automatically adjusting gain, freeing the
electronic shutter for other use.
• Shutter speed range is approximately 1/60 - 1/250 s.
• Since adjustment is made within the gain circuit, this function may not work well in a strong-flicker
environment such as under multiple fluorescent lights.
Auto Exposure functions
• The DXC-990/990P and DXC390/390P have an AGC function which automatically boosts video gain
and CCD IRIS function, automatically reducing the camera exposure time by changing the
electronic shutter speed.
• The range of AGC is equivalent to an increase of four stops in a lens and the range of CCD IRIS is
equivalent to a decrease of ten F stops.
• When the AGC and CCD IRIS functions are used together with an auto iris lens, the DXC-990/990P
and DXC-390/390P can adjust themselves to a wide range of incoming light levels automatically.
4 F-stops
AGC
Video Servo Auto Iris Lens (DXC-390/390P Only)
• There are two new motorized remote control lenses for the DXC-390/390P. This camera also accepts
two general video servo lenses which is standard in the surveillance field.
10 – DXC-990/990P, DXC-390/390P Sales Manual
Auto Iris
10 F-stops
CCD IRIS