JVC TK-C655 Instructions Manual page 23

CAMERA ALC/ExDR Screen (Continued)
Item
AGC MODE Sets the maximum gain of the AGC (Auto Gain Control), which electronically in-
creases the gain when the object is under low light conditions.
OFF
10 dB
20 dB
SUPER : Use this setting when brightness is still insufficient under the "20 dB"
MEMO
●
Note that increasing gain affects picture quality.
●
When the "SUPER" setting is used, the AGC operation may take a while to adjust to
sudden drastic changes in the brightness level.
SENSE UP This function is used to increase the sensitivity by extending the exposure time.
Increasing this value slows the shutter speed and motion may appear unnatural.
When the item "SHUTTER" is set to "1/250" or more, the SENSE UP item does not
work and "---" is displayed as the item name in the CAMERA ALC/ExDR Screen.
Setting values: OFF, x2
MEMO
●
When SENSE UP is activated, the picture may become rough and whitish, and subject
to white blemishes.
●
When the setting of the "SENSE UP" function is not OFF, flicker may appear on the
screen under fluorescent light or mercury lamps. This is due to the principles of the
SENSE UP, and is not a malfunction.
●
There may be cases where flicker can not be reduced even under the following condi-
tions: 1) Shutter speed is set at 1/120 in areas where the commercial electric current
frequency is 50 Hz. 2) The shutter speed is set at 1/50 in areas where the commercial
electric current frequency is 60 Hz.
ExDR MODE The ExDR function synthesizes pictures captured at a shutter speed of 1/100 and
those captured at higher shutter speeds to help monitor objects having large differ-
ences in brightness levels.
When the "SHUTTER" function is set to "1/250" or a higher, this function does not
work and "---" is displayed as the item name in the CAMERA ALC/ExDR Screen.
OFF : Turns the ExDR function off.
ON : Turns the ExDR function on.
MEMO
●
When the ExDR function is on, flicker may appear on the screen under fluorescent light
or mercury lamps. This is due to the principles of the ExDR, and is not a malfunction.
●
There may be cases where flicker cannot be reduced even under the following condi-
tions: 1) Shutter speed is set at 1/120 in areas where the commercial electric current
frequency is 50 Hz. 2) The shutter speed is set at 1/50 in areas where the commercial
electric current frequency is 60 Hz.
ExDR LEVEL This function sets which section of the object is to be displayed in the easiest-to-
view brightness level in the ExDR mode.
To make a low-light section of the object easy to view: Increase the level.
To make a highlighted section of the object easy to view: Decrease the level.
Setting values: –5 to NORMAL to 5
MEMO
●
When the difference in brightness between objects is large, the picture may not change
even when the ExDR LEVEL is varied. This is due to the characteristics of the camera
and is not a malfunction.
●
When the item "SHUTTER" is set to 1/250 or higher, "---" is displayed and the settings to
the item "ExDR LEVEL" cannot be carried out.
●
When the item "ExDR MODE" is set to OFF, the settings for the item "ExDR LEVEL"
cannot be varied.
Function & Setting
: Turns the AGC off.
: According to the brightness of the object, gain is increased by up to 10 dB
: According to the brightness of the object, gain is increased by up to 20 dB
setting.
Initial Value
10 dB
OFF
OFF
NORMAL
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