JVC TK-C655 - Manual (Page 27)

27
CAMERA ALC screen (Continued)
Item
SENSE UP
Initial Value
OFF
Function & Setting
This function is used to increase the sensitivity by extending the exposure time.
When the object is dark, this function sets how high the level of sensitivity will
automatically increase to. “x32” means that the sensitivity will be increased con-
tinuously up to 32 times the normal level.
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 Screen.
Setting values
TK-C655: OFF, x2
TK-C676: OFF, x2, x8, x16, x24, x32
●
As the setting of the “SENSE UP” function is increased, the picture may become rough
and whitish, and subject to white blemishes. This is not a malfunction.
●
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.
MEMO
●
When the “AGC MODE” and “SENSE UP” functions are both set to “OFF”, this function
does not work and “---” is displayed as the item name in the CAMERA ALC Screen.
●
When item “B&W” is set to AUTO, item “PRIORITY” is set to the MOTION priority mode
and “---” is displayed.
MEMO
When an object is dark, this functions sets whether priority during monitoring is
placed on maintaining the motion of the camera or on picture quality.
MOTION
: Motion of the camera is given priority. When an object is dark, the
AGC function is prioritized. This setting is suitable when objects are
characterized by quick motion.
PICTURE : Picture quality is given priority. When an object is dark, the SENSE UP
function is prioritized. This setting is suitable when picture quality is
important.
PRIORITY
*TK-C676 only MOTION
B&W/COLOUR
MODE ..
B&W
This function sets the color modes to color or B&W.
Switches the mode from color to B&W and vice-versa.
OFF
: Turns the B&W mode switching function off.
ON : Sets the camera permanently to B&W mode.
AUTO : The camera automatically switches to Color mode when the ob-
ject is bright and to B&W mode when it is dark.
ALARM IN 1 to 4 : The camera switches to B&W mode when there is an alarm
input from terminals Alarm 1 to Alarm 4.
The B&W mode is set to ON when the contact is shorted (makes
contact) and OFF when the contact is opened (breaks contact).
NORMAL
OFF
When the item “B/W” is set to other than AUTO, “---“ is displayed and the settings to the item
“LEVEL” cannot be varied.
MEMO
As the camera is sensitive to both visible and near-IR light in the B&W mode, there may be
cases in which switching the color mode to the B&W mode causes the image to become out
of focus in certain light source conditions. In this case, if the item “AF FOR IR” (
☞
P. 23)
under CAMERA FUNCTION2 Screen is set to “ON”, focus can be adjusted automatically..
Also, use an IR illumination as needed.
MEMO
●
To ensure switching between the color and B&W modes:
Setting item “B&W” to AUTO allows the color and B&W modes to be switched according
to the brightness of the object. However, this switching may sometimes not occur de-
pending on the lighting condition and viewing angle.
To ensure the switching, it is recommended to connect the signal from an external sen-
sor (to be purchased separately by the user) to one of the ALARM input terminals of the
camera and perform switching according to the sensor signal.
●
In order to prevent hunting do not set the item “B&W” to AUTO when using an infrared lamp.
MEMO
When the “B&W” function is set to “AUTO”, this function sets the signal level of the
object at which the camera will automatically switch to B&W mode.
LOW
: The camera switches to B&W mode when the signal level of the object is low.
NORMAL : The camera switches to B&W mode when the signal level of the object is
normal.
HIGH : The camera switches to B&W mode when the signal level of the object is high.
LEVEL NORMAL