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

 

®

 

LWT0035

 

©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.Turn switch e to “PHASE”;

3.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 initial setting, press RESET button q.

TK-C720TPU: 60Hz power region only

TK-C720TPE: 50Hz power region only

White Balance White balance can be adjusted within the scope of 2900K to 8000K color temperature. When switch t is at “AUTO”, the white balance is adjusted automatically. For manual adjustment, take the following steps:

1.Turn switch t to “MANUAL”;

2.Turn switch e to “WHT.BAL”;

3.Pressing “R” button w increases redness while pressing “B” button w increases blueness. For initial setting, press RESET button q.

There are cases sometimes when the white balance cannot be adjusted manually for artifical lights such as fluorescent lights, etc.

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.

 

 

 

 

 

 

 

 

 

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

, balanced

 

 

 

MONITOR output

: Composite video signal 1 V (p-p), 75 , unbalanced

 

Video S/N ratio

: 50 dB (AGC OFF)

 

 

 

 

 

 

Minimum required illumination : 1.5 lx (25%, F1.2, AGC ON), 3.0 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.)

 

 

 

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JVC TK-C720TPU, TK-C720TPE operating instructions Lens Adjustment, Setting Switch, Specifications