JVC TK-1280E - Page 13

@ SHUTTER mode select switch
This varies the shutter speed (the time the change is
stored). Normally, when a fast-moving object is being shot,
still or slow-motion played back pictures will be blurred. In
this case, switching the shutter speed from the normal
speed of 1/50 second to a faster speed allows each frame
to be recorded with greater detail, at the higher speed.
When using a manual iris lens, the brightness of the picture
image will be fixed by setting this switch in AUTO(CCD iris)
position, as the shutter speed is automatically varied
according to the light incident.
Switch position Shutter speed
Reeser 1/50 second
NORM [2] [a] 2! &] Normally, set to this position.
120 ABOU
(Switches No. 3 and 4 1/120 second
can be set either in upper
or lower position)
125 BOE 1/125 second
1/250 second
1/500 second
1/1000 second
1/2000 second
1/4000 second
AUTO FAOO
(Switches No. 3 and 4
can be set either in upper
or lower position.)
CCD iris function
(Do not set this switch in this position
when using an auto-iris lens.)
@ BLC (Back Light Compensation) switch
This function makes the iris focus on an object to be shot
and is located near the center position of the screen.
Brightness area
Set this switch to “ON” at the time of back-light.
ON (upper side): Back-light compensation is activated.
The iris will be opened when the circum-
ference is lighter than the center of the
screen.
The iris will be closed when the circumfer-
ence is darker than the center of the
creen.
OFF (lower side): Back-light compensation is not activated.
Notes:
* This function is activated when the camera SHUTTER
mode select switch is set to AUTO position and when
using the galvanometric auto-iris lens or the video-
level-sensing auto-iris lens.
¢ This function is not effective when the difference of the
brightness of the center of the screen and its circum-
ference is small.
© AGC (Automatic Gain Control) switch
This automatically increases the camera’s sensitivity when
the level of ambient light drops.
ON (upper side): AGC is activated.
OFF (lower side): AGC is not activated.
Caution:
e The CCD iris function is not activated for a light object
to be shot, such as in outdoor condition. In such a case,
use the camera with the auto-iris or manual-iris.
Notes:
e@ Faster shutter speeds require more light than the nor-
mal speed. (in the 1000 mode, the sensitivity is approx.
1/20 that at norma! speed; in the 10000 mode, approx.
1/200.)
e When shooting with the faster shutter speed, or when a
light object is being shot by setting in AUTO position
(the shutter speed becomes faster), the brightness and
white balance may change periodically. Shooting with
artificial lighting (especially fluorescent lights) will cause
the pictures to flicker. Smear (bright horizontal or verti-
cal lines) which can often be seen with solid-state pick-
ups may appear in the picture.
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@ Sync mode switch
The internai/external sync mode (automatic) or line-lock
syne mode (or H/V lock mode) is available with the TK-
1281EG. Set the sync mode switch correctly.
LL position:
In the line-lock setting, the camera’s vertical synchroniza-
tion can be driven by the 50 Hz AC signal in the power
lines. To select power lines phase-locked sync, set the
switch to the LL position.
Furthermore, when an external H/V sync signal is input, the
camera automatically switches to the H/V lock mode.
Notes:
e Do not supply an external sync reference signal when
using the camera in line-lock mode.
e In the line-lock sync mode, synchronization may not be
correct for a few seconds after the power is turned on;
this is not a malfunction.
VE (internal/external) position:
Select internal/external sync by setting the sync mode
switch to the I/E position. with this setting, when the exter-
nal sync reference signal is input, the camera switches to
the external sync mode, and when no signal is input, rhe
camera switches to the internal sync mode automatically.
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