Hitachi HV-D25 User Manual
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3. SUB MENU 1
1) M BLACK:Master black level setting
The master black level can be set in a range of -128 to 127. Pressing the R button increases a set value to make
the black level higher, and pressing the L button decreases a set value to make the black level lower. For zero
(0) setting, hold down both the L and R buttons for approx. two seconds.
2) SHUTTER:Electronic shutter mode
The electoric shutter setting is changed over as shown below When VARIABLE is selected, a shutter speed
specified at VARIABLE is used in operation.
In the Auto camera mode, if the Lens Type is set to DC, the shutter mode defaults to AES. If Lens Type is set
to Video, default is to Off
(Note):1. If the Lens Type is Video, the AES mode cannot be used. If using a manual iris lens, set the Lens Type to DC
and the Iris Mode to Manual in order to use AES.
If the iris opening is proportional to the DC voltage (with manual over-ride), set the Lens Type to DC and the Iris
Mode to Auto.
2. In the AES mode, the CCD operates in FLD mode even if set to FRM.
3) VARIABLE:Variable electronic shutter speed setting
•
8 1/30 1/25:PAL :Long-time store mode
The camera delivers intermittent video signal output. So, to view continuous images, it is required to use
the video memory. A clear image can be attained even if the subject is illuminated with a faint light source.
As the store time increases, the degree of after-image becomes higher.
(Note) With an increase in store time, the degree of characteristic pattern noise, white scratch, etc. of the
CCD image sensor will become higher.
•
1/60.38 (1/50.31: PAL) 1/251.5 (1/253.8: PAL):Lock scan mode
When an image of a subject display screen having a different scan frequency is taken, a bright or dark
horizontal bar appears to roll up or down the screen.
When the shutter speed is Variable, operation is at the speed selected by the Variable setting (see below). In
the Auto CAM mode, the shutter is set to AES.
The shutter speed can be adjusted to where the horizontal bars are minimized in the
display.
(Note) If the display screen scanning frequency is less than 60Hz (50Hz PAL), the rolling horizontal bars
cannot be stopped. Not settable in the Auto CAM mode.
1
/
1
0
0
(
N
T
S
C
)
1
/
6
0
(
P
A
L
)
1
/
2
5
0
1
/
5
0
0
1
/
1
0
0
0
1
/
2
0
0
0
1
/
4
0
0
0
1
/
1
0
0
0
0
V
A
R
I
A
B
L
E
A
E
S
O
F
F
Lock scan/long-time store mode
Auto electronic shutter mode
L
L
R
R
1
/
2
5
1
.
5
1
/
6
0
.
3
8
1/30
L
L
R
R
8