Adjusting and Setting with Menus

2 Chapter

Selection

Function

VARIABLE

Clear scan mode

(Continued)

You can set the shutter speed in units of 1H

 

(horizontal scanning time: 63.56 μs for DXC-390,

 

64.00 μs for DXC-390P).

 

Select SPEED, then select the value from 1/525H to

 

262/525H (DXC-390) or 1/625H to 312/625H (DXC-

 

390P). This mode can be used for shooting

 

computer displays with reduced horizontal bands

 

appearing across the display screen.

To set the shutter speed

1Display OFF by pressing the B and b buttons simultaneously.

2Select the SPEED value by pressing the b button while observing the noise on the monitor screen so that you can obtain the image with minimum noise. Each time you press the button, the value changes in units of 1H.

 

To convert the value into the shutter speed

 

Example: When the value is set to 250H

 

DXC-390:

 

250 × 63.56 μs (1H) + 34.9 μs (constant)

 

= 15924.9 μs = Approx. 0.016 seconds

 

DXC-390P:

 

250 × 64.00 μs (1H) + 35.0 μs (constant)

 

= 16035.0 μs = Approx. 0.016 seconds

 

 

CCD-IRIS

Automatically adjusts the luminance level for

 

optimum output level. When incoming light is

 

excessive, this function automatically adjusts the

 

shutter speed to cut exposure equivalent to up to 10

 

aperture stops.

Selection Function

CCD-IRIS For example, this function is useful for microscope (Continued) applications. When shooting with a microscope not equipped with the auto-iris lens, the luminance level that is just right for the human eye is often too bright

for the video camera.

When CCD-IRIS is selected, the electronic shutter automatically decreases excessive incident light to an appropriate level for the video camera. This function is also useful for cutting out excessive incident light that is not cut out by the auto-iris lens in scenes containing very bright patches (such as snow, or sea water reflecting sunlight).

You can select the highest limit value of the variable range of the shutter speed. Select LIMIT, then set the speed to 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/10000, 1/20000,1/40000 or 1/100000.

Note

You cannot use CCD-IRIS mode when using a lens that automatically adjusts the iris control according to the video signal input.

LENS

Selects the iris mode.

Selection

Function

 

 

VIDEO

Select when you use a lens that automatically

 

adjusts the iris according to the input video signal.

 

Select AE LEVEL, then adjust the auto exposure

 

focusing point in the range from –127 to +127.

 

 

REMOTE

Select when you use a lens that adjusts the iris

 

according to the DC power supplied.

 

 

18 (GB) Chapter 2 Operation