Grass Valley 3-CCD CameraMan User Manual
Page 85
CameraMan Installation and Operation Manual
85
User Mode Submenus Overview
Light PEAK/AVG
(P50 to A50) The ratio of AUTO IRIS, AUTO GAIN UP, ELC detected peak to average can be
adjusted within a range.
Light Area
A photometric measurement method can be selected for AUTO IRIS, AUTO GAIN UP, ELC.
All: All the screen is measured.
Center: The screen is measured mainly in the center area, about one-third of both the top and
bottom and one-third of both the right and left portions of the screen are excluded from measure-
ment.
Top cut: About one-third of the top portion of the screen is excluded from measurement.
BTM cut: About one-third of the bottom portion of the screen is excluded from measurement.
R/L cut: About one-third of both the right and left portions of the screen are excluded from mea-
surement.
Auto Iris Adjust
(ON, OFF)
Shutter Mode
Step: Electronic shutter operates at the speed selected by the Step/Synchro setting.
S/Scan (Synchro Scan): Electronic shutter operates at the speed selected in Step/Synchro set-
ting.
ELC: Electronic shutter is controlled to automatically adjust the luminance.
*If Frame 1 is selected in Field/Frame setting, Shutter Mode setting cannot be added.
Step/Synchro
This setting is possible only when Step or Synchro Scan is selected in Shutter Mode setting.
When “Step” has been selected as the Shutter Mode setting:
OFF: Electronic shutter is turned off.
1/100, 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/10000: Electronic shutter operates at one of
these speeds as selected.
When “Synchro Scan” has been selected as the Shutter Mode setting:
60.34 Hz to 15.75 kHz: Bar noise can be reduced by synchro-scan adjustment in shooting work-
station scenes, for example.
*For luminance setting at each shutter speed and synchro-scan shutter speed, refer to the table
below.
Shutter Speed
Synchro-Scan
Required Luminance Ratio
OFF
-
1
1/100
100.3 Hz
2
1/250
250.0 Hz
4
1/500
492.2 Hz
8
1/1000
984.4 Hz
16
1/2000
1.969 kHz
32
1/4000
3.938 kHz
64
1/10000
7.875 kHz
160
Gain
Auto: The light quantity is adjusted automatically.
0 dB: 0dB should be selected in normal cases.
1 dB to 30 dB: Use this range if sufficient video output cannot be obtained even when the lens iris is
opened in shooting dark scenes.
N/Eye L (Night Eye L): Use this mode if sufficient video output cannot obtained even if 30 dB gain up
should be selected.
N/Eye H (Night Eye H): Use this setting if it is not possible to achieve a satisfactory video output
even at the Night Eye L setting.
AGC Max Gain
(6dB, 12dB, 18dB, 24dB, N/Eye L, N/Eye H) This is used to set the maximum gain up when “Auto”
has been selected as the gain setting.
Table 31. Iris, Shutter, Gain Settings