Hitachi KP-F140F, Руководство по эксплуатации

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5
-AUTO-
Setting value 83000000 h
Gain is automatically adjusted in the range of 0 to 18 dB in response to light source brightness.
(5) SHUTTER (CSR: F0F0 081C h)
Sets electronic shutter speed.
-OFF-
Setting value 80000000 h
Switches off shutter operation.
*The
shutter speed (at OFF) is as follows.
・
KP-FD140F/F140F 1/30 second (VGA), 1/15 second (SVGA, XGA, SXGA)
・
KP-FD32F/F32F 1/60 second
・
KP-F83F 1/30 second
-Manual adjustment-
Setting value 82000xxx h xxx: 000h to 600h
Electronic shutter can be set in the range of 10 to 1/100,000 second.
Shutter speed setting value can be derived as follows.
(
ShutterSpeed : μsecond)
a)
Setting value xyy obtained from exposure time.
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
×
⎟
⎠
⎞
⎜
⎝
⎛
− =
=
9
100
1
10
h ed ShutterSpe
ed ShutterSpe
x
yy
x
int
)) int(log(
b) Exposure
time obtained from setting value.
sec] )[ 9
100h
yy
1 ( 10
1 x
µ
× + × =
+
ed ShutterSpe
Ex.1 Exposure time = setting value nnn to obtain 1/125 second (= 8000μsecond).
2C7 nnn
C7h
9
100h
yy
x
3
= ∴
=
⎟⎟
⎠
⎞
⎜⎜
⎝
⎛
×
⎟
⎠
⎞
⎜
⎝
⎛
− =
= =
1
10
8000
3 8000
int
)) int(log(
Ex.2 Setting value 25Dh that produces 1/234.22 second exposure time.
[sec]
22 . 234
1
sec] [ 4269.53
) 9
100h
5Dh
1 ( 10
1 2
=
=
× + × = +
µ
ed ShutterSpe
-AUTO-
Setting value 83000000 h
Auto electronic shutter operates to vary the shutter speed in the range of 10 to 1/100,000 second in
response to light source brightness.
If light is excessive, a suitable level is selected for maintaining a video output. This function is effective
when using microscope or other optical system without an automatic lens iris.
(6) AUTO EXPOSURE (CSR: F0F0 0804 h)
At auto gain (AGC) or shutter (AES) setting, the sensitivity is automatically adjusted to maintain the
proper video level.
-Manual adjustment-
Setting value 820000xx h xx: 00h to FFh (standard 80h)
Video level decreases toward 00h and increases toward FFh.