JVC KY-F1030 Bedienungsanleitung Seite 48

6. Others
About ALC and EEI operations
ALC stands for Automatic Level Control and EEI for Extended Electronic Iris. (
By making the respective settings, the Automatic Level Control (ALC) will operate under dark
lighting, and the electronic shutter (EEI) will operate under bright lighting. Furthermore, setting
the IRIS mode to AUTO will synchronize sensitivity, iris and electronic shutter so that an appro-
priate signal level can be acquired automatically at all times.
The ALC mode increases sensitivity from 0dB to +12dB under dark lighting and the EEI
modeautomatically adjusts the range of 1/7.5 s to 1/2384.7 s (calculated value) under bright
lighting. In other words, the signal level is adjusted in the range of 2 graduations of the aperture
under dark lighting and 8 graduations under bright lighting. When the IRIS mode is set to manual,
the sensitivity and electronic shutter change continuously while the iris setting stays fixed. (
page E33 IRIS MODE)
This feature holds the advantage of being able to shoot under changing light conditions without
the depth of field altering.
MEMO
• The status of ALC and EEI can be displayed on the screen. (
• When EEI is used, the amount of change in one step of the signal level will be large and the precision
becomes bad as the shutter speed is faster.
• When analog output is used, and EEI LIMIT is set to 1s when a dark subject is shot, the image will
appear intermittently so the 1/7.5s setting should be used.
Operational range (when ALC MAX: +12dB)
4
Light: lx
8
+12dB
EEI LIMIT
: When 1/7.5s
EEI LIMIT
: When 1s
+12dB +6dB 0dB 0dB
ALC
1/1.871s 1/3.75s
E44
16 63
31
+6dB 0dB
ALC
F2 F2.8
EEI
250 1000
500
125
Auto Iris
F4 F5.6 F8 F11
page E40 AE DISPLAY)
4000 16000
2000 8000
1/7.5 1/7.5
EEI
1/15 1/30 1/60
F16
page E34)
64000
32000 640000
1/120 1/2384.7