JVC TK-C720TP operating instructions Lens Adjustment, Setting Switch, Specifications

G

IRIS

VIDEO
DC
L	H

LEVEL

LEVEL

L H	LEVEL
AvPk	ALC	BF LOCK

ALC

H

4

1,5

I	8
	7
	6
	5
	4
	3
	2

1

J [: mm]

U1-32	123
50	115

50 58

32.5

42

1/4-20 UNC

30

	®
		Printed in Thailand
		LWT0035-001B-H
VICTOR COMPANY OF JAPAN, LIMITED		©2002 VICTOR COMPANY OF JAPAN, LIMITED
®	is a Registered Trademark owned by VICTOR COMPANY OF JAPAN, LTD.
®	is a Registrated Trademark in Japan,the U.S.A., the U.K. and many other countries.

LENS ADJUSTMENT	∆G
Video adjust
Connect the camera according to the connection method, turn it on, display an image on the
monitor, and check the image. The camera has been factory-adjusted to the best position, but it
may need to be adjusted according to the object conditions or combination of lenses. If the image

is unnatural, adjust it as follows:
• LEVEL adjustment
Monitor screen	LEVEL turning direction
Too bright	Counterclockwise (Toward L)
Too dark	Clockwise (Toward H)

• ALC adjustment
Monitor screen	ALC turning direction
Part (high-intensity part) of the screen halates.	Clockwise (Toward Pk)
Other part of screen (except high-intensity part) darkens.	Counterclockwise (Toward Av)

•If the sensitivity adjustment LEVEL is turned excessively to L, the sensitivity increases be- cause of the AGC function of the camera, and the image looks grainy.

•If the video iris lens is set to too low a level, malfunction such as the hunting phenomenon, in which the iris opens or closes unintentionally, may occur.

In such a case, first set LEVEL potentiometer on the lens to the H (iris open) position then adjust it to the optimum level.

Back focus adjustment	∆H
The back focus has been adjusted to the best point for CS-mount lens, but it may need
to be re-adjusted if the mount is changed to the C-mount or if a different lens is used. If
required, adjust it as follows:
• With a fixed-focus lens
If the focus can not be adjusted correctly by rotating the lens focus ring, adjust the back focus as
follows.

1.Loosen the back focus locking screw by turning it counterclocckwise ( ) with a screwdriver.

2.Shoot a pattern closely.

3.Turn the lens focus ring to ∞.

4.Turn the back focus adjustment ring to focus at the best point.

5.Tighten the back focus locking screw by turning it clockwise ( ).

• With a zoom lens If the image is out of focus when zooming (telephoto wide-angle), adjust the camera as follows:

1.Loosen the back focus locking screw by turning it counterclocckwise ( ) with a screwdriver.

2.Shoot a comparatively dark scene with thin lines.

3.Set the lens to the maximum telephoto position, and adjust the lens focus.

4.Set the lens to the maximum wide-angle position, and turn the back focus ring to adjust the focus.

(Repeat steps 2 and 3 two or three times.)

5.Tighten the back focus locking screw by turning it clockwise ( ).

SETTING SWITCH	∆I
Line Lock
To set the camera in LL mode for synchronization with the power supply frequency, take the follow-
ing steps:

1.Turn switch r to “LL”;

2.Press the + or – button w to make the phase variable.

Adjust with the button w so that the vertical phase of the camera matches the vertical phase of

another camera (or system) with a multi-channel oscilloscope. For the initial setting, press the + and – buttons w together.

TK-C720TPU: 60Hz power region only

TK-C720TPE: 50Hz power region only

White Balance
White balance can be adjusted within the scope of 2900 K to 8000 K color temperature. When
switch t is at ATW (Auto-Tracking White Balance), the white balance is automatically adjusted
according to the color temperature of the ambient illumination.
When the white balance is set to AWB (Auto White Balance), press and hold the SET button q for
2 seconds to adjust or readjust the white balance. Once the white balance is adjusted, the setting
will not track changes in the color temperature of the ambient illumination.
BLC (Back Light Compensation)
The switch y improves an image that is darkened because of backlighting.
Set this switch to ON for backlight subjects.
AES (Automatic Electronic Shutter)
Turning this switch u "ON" when a lens with a manual iris diaphragm is used enables the auto-
matic adjustment of image brightness. In this case the shutter speed changes according to the
brightness of the subject. AES functions only when AGC switch i is turned on.
Hunting may occur at a certain object brightness due to the mechanism of the AES circuit, but
this is not a fault.
AGC (Automatic Gain Control)
The switch i automatically increases the camera’s sensitivity when the level of ambient light
drops.
ON: AGC is activated.
OFF: AGC is not activated.
NOT USED
Switch e does not function.
SPECIFICATIONS
Image pickup device	: 1/3-inch interline-transfer CCD
	TK-C720TPU	:	768 (H) ⋅ 494 (V)
Synchronization method	TK-C720TPE	:	752 (H) ⋅ 582 (V)
	: Internal
Scanning frequency	Line lock (TK-C720TPU 60 Hz, TK-C720TPE 50 Hz regions only)
	: TK-C720TPU: (H) 15.734 kHz (V) 59.94 Hz
Resolution	TK-C720TPE: (H) 15.625 kHz (V) 50 Hz
	: 470 TV line (H) Typ.
VIDEO OUT	: 1.2 V(p-p), 100 Ω, balanced
MONITOR output	: Composite video signal 1 V (p-p), 75 Ω, unbalanced
Video S/N ratio	: 50 dB (AGC OFF)
			.
Minimum required illumination : 0.8 lx (25%, F1.2, AGC ON), 1 5 lx (50%, F1.2, AGC ON)
Lens mount	: C/CS mount
Power supply	: TK-C720TPU	: AC 24 V ` 60 Hz DC 12 V		4.4W
and power consumption	TK-C720TPE	: AC 24 V ` 50 Hz/60 Hz DC 12 V				360mA
Ambient temperature	: –10˚C to 50˚C (operation)
Mass	0˚C to 40˚C (recommended)
	: 380 g
Provided accessory	: 4 PIN PLUG .................................................... ⋅1
DIMENSIONS (Unit: mm)	WARRANTY CARD (TK-C720TPU only) ....... ⋅1				∆J
(Design and specifications are subject to change without notice.)