User's Manual

47
Long-Time Store Mode
In case that illumination on the subject is insufficient, just increasing the gain of the camera may cause an
increase in noise, resulting in an unclear image. In such a situation, it is advisable to select the long-time
store mode using the external memory. Thereby, the image can be brighter and clearer according to the
stored amount of image. This camera is provided with two kinds of image store functions (CCD
MODE:FLD/FRM in SUB MENU 1). When one of these image store functions is used, video signal output
is delivered from the camera with the timing shown below.
Since the degree of after-image increases for a moving subject because of image storing, it is recommended
to use the image store function when taking a still picture or scene.
CCD line A
Even field
odd field
Field store mode
Aa
Ab Ac Ad
Ba Bb Bc Bd
Ab+
Bb
Ac+
Bc
Aa+
Ba
VD signal
Store charge
on CCD line A
Video signal
Store time: 1/15 s (Example)
WE signal
In the field store mode, both the CCD lines
A and B are read out simultaneously. After
completion of storing, video signal output is
made on the next field. Immediately before
the field on which video signal output is
made, the WE signal is delivered from the
D-SUB connector equipped on the rear
panel.
Even field
CCD line B
CCD line A
CCD line B
Store charge
on CCD line B