JVC VN-C655 manual Auto Black Control, Average Peak, Large Peak value, Set value, Shutter

Item			Function/Set Value	Initial Value
Auto Black Control	Use this function when darker parts of a picture are unclear			OFF
	even after the gain has been increased using the AGC (Auto
	Gain Control).
	ON : When the black level of the video signal is low, the
		pedestal level is increased automatically in order to
		improve the clarity of the darker parts.
	OFF : Turns this function off.
Average : Peak	Sets the method of exposure detection according to ratio be-			8:2
	tween the average and peak values.
	• Large Average value : Use this setting when areas other than
			those highlighted are dark and unclear.
			(Example: 10:0)
	• Large Peak value		: Use this setting when halation occurs
			at the highlighted areas.
			Use this setting when areas other than
			those highlighted are dark and unclear.
			(Example: 5:5)
	Set value		: 10:0, 9:1, 8:2, 7:3, 6:4, 5:5
Shutter	Sets the speed of the electronic shutter.			1/60
	Set value : 1/60, 1/100, 1/250, 1/500, 1/1000, 1/2000, 1/4000,
		1/10000
	Notes
	•	To reduce flickering that occurs under fluorescent
		lighting, set the shutter speed to 1/100 if your local power
		supply frequency is 50 Hz, and to 1/60 if it is 60 Hz.
	•	The higher the shutter speed, the more prominent will
		be the smear phenomenon. This is a phenomenon that
		is characteristic of CCDs, whereby white stripes appear
		at the top and bottom of a bright light source.
AGC	Sets the maximum gain of the AGC (Auto Gain Control), which			10 dB
	electronically increases the gain when the object is under low
	light conditions.
	OFF	: Disable AGC.
	10 dB : Increase gain by a maximum of 10 dB according to
		the brightness of the object.
	20 dB : Increase gain by a maximum of 20 dB according to
		the brightness of the object.

Note

•The screen may appear grainy at dark places when the gain level is increased.

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