JVC TK-C751 operating instructions Lens Adjustment, Specifications

Page 2

G

 

 

 

 

 

 

 

 

 

IRIS

 

 

 

 

 

L H

 

 

 

 

 

LEVEL

 

 

 

COLOR VIDEO CAMERA

 

 

 

 

 

LEVEL

 

H

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

1,5

I

6

 

 

6

 

 

 

 

 

 

 

5

 

 

5

 

 

4

 

 

4

 

 

3

 

 

3

 

 

2

 

 

 

 

 

 

 

 

2

7

 

1

 

 

7

 

 

 

1

 

 

 

 

 

 

 

 

TK-C750

 

 

TK-C751

J [: mm]

U1-32

 

 

126

 

 

50

 

 

115

 

 

50

59

BF LOCK

 

 

32.5

 

 

 

COLOR VIDEO CAMERA

 

 

41.5

 

 

 

 

 

TK-C750

 

30

1/4-20 UNC

 

 

 

 

 

MOUNTING HOLE

 

 

U1-32

 

 

125

 

 

 

 

115

 

 

65

 

 

 

 

 

 

 

 

 

55

63

 

 

 

35

 

 

DIGITAL

 

 

 

42

 

 

1/4-20 UNC

 

 

 

 

30

 

 

 

 

MOUNTING HOLE

 

 

TK-C751

 

 

 

 

 

 

 

 

R is a registered trademark owned by Victor Company of Japan, Limited.

 

R is a registered trademark in Japan, the U.S.A., the U.K. and many other countries.

© 2005 Victor Company of Japan, Limited.

 

Printed in Thailand

 

LST0264-001A-H

LENS ADJUSTMENT

G

Video adjust

A readjustment might be necessary depending on the configuration of the shooting object or the lens installed. To perform a readjustment, the AGC switch on the back of the unit should be turned OFF before adjusting the LEVEL. Turn the AGC on again when the adjustment has been completed.

• LEVEL adjustment

Monitor screen

Direction of Rotation of LEVEL control

 

 

Too bright

Anti-clockwise, towards L (Low)

 

 

Too dark

Clockwise, towards H (High)

If the sensitivity adjustment LEVEL is turned too far to L, the sensitivity will increase due to the AGC function of the camera, making the image look grainy.

Back focus adjustment

Back focus has been optimally adjusted at the factory for CS-mount lenses, but it may

need re-adjustment if the mount is changed for C-mount lenses. If required, adjust as H 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 anti-clockwise ( ) with a screwdriver.

2.Point the camera at a test pattern.

3.Turn the lens focus ring to ￿.

4.Turn the back focus adjustment ring to find optimum focus.

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

• With a zoom lens

If the lens does not track (loses focus) at any point in the zoom range, adjust as follows:

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

2.Point the camera at 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 (The illustration shows the factory-set default settings.)

I

Line Lock

To set the camera in LL mode for synchronization with the power supply frequency, do the following :

1.Turn switch 2 to “LL”;

2.Press the + or – button 1 to make the phase variable.

Adjust with the button 1 so that the vertical phase of the camera matches the vertical phase of another camera (or system) with a multi-channel oscilloscope.

To reset the setting, press the + and – buttons 1 simultaneously.

U type

: 60Hz power region only

E/EG type

: 50Hz power region only

 

 

White Balance

White balance can be adjusted within the scope of 2300 K to 10000 K color temperature. When switch 3 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 7 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 4 helps to rectify the situation where a subject appears dark because of backlighting. Set this switch to ON for strongly backlit subjects.

AES (Automatic Electronic Shutter)

Turning this switch 5“ON” when a lens with a manual iris diaphragm is used enables the automatic adjustment of image brightness. In this case the shutter speed changes according to the bright- ness of the subject.

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 6 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-C750U

: 510 (H) ￿ 492 (V)

Synchronization method

TK-C750E/TK-C751EG

: 500 (H) ￿ 582 (V)

: Internal

 

 

Scanning frequency

Line lock (U type: 60 Hz, E/EG type: 50 Hz, regions only)

: U type

: (H) 15.734 kHz, (V) 59.94 Hz

Resolution

E/EG type : (H) 15.625 kHz, (V) 50 Hz

: 330 TV line (H) Typ.

 

VIDEO OUT

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

Video S/N ratio

: 50 dB (AGC OFF)

 

Minimum required illumination : 0.28 lx typ (F1.2, 25%), 0.55 lx typ (F1.2, 50%)

Lens mount

: C/CS mount

 

Power supply

: TK-C750U : AC 24 V ` 60 Hz, DC 12 V }, 3.3 W

and power consumption

TK-C750E : AC 24 V ` 50 Hz/60 Hz, DC 12 V }, 270 mA

Ambient temperature

TK-C751EG : AC 220 V - 240 V ` 50 Hz/60 Hz, 42 mA

: –10 ˚C to

50 ˚C (operation)

Mass

0 ˚C to 40 ˚C (recommended)

: TK-C750 : 340 g

 

Provided accessory

TK-C751 : 680 g

 

: WARRANTY CARD (TK-C750U only) ... ￿1

DIMENSIONS (Unit: mm)

 

 

 

(Design and specifications are subject to change without notice.)

J

 

Image 2
Contents Connection PrecautionsMounting a LENS∆A EG onlyLens Adjustment Specifications

TK-C751 specifications

The JVC TK-C751 is a high-performance high-resolution color camera designed primarily for professional surveillance and security applications. This versatile and robust camera is a part of JVC's portfolio, known for its commitment to quality and reliability in video imaging.

One of the standout features of the TK-C751 is its exceptional image quality, driven by advanced technology. The camera supports a resolution of up to 540 TV lines, delivering crisp and clear images even in varying lighting conditions. This high resolution is complemented by its advanced signal processing capabilities, which ensure strong performance in both bright and low-light environments. The integrated 1/3-inch CCD sensor helps to capture vivid colors and fine details, making it ideal for monitoring tasks that require precision.

The JVC TK-C751 also features an electronic shutter with adjustable speeds, ranging from 1/60 to 1/100,000 seconds. This flexibility allows users to adapt the camera’s performance to different environments and lighting conditions, reducing motion blur in fast-moving scenes and enhancing the overall clarity of recorded footage. Its sensitivity ratings of 0.5 lux at F1.2 make it suitable for low-light conditions, ensuring reliable performance during nighttime surveillance.

Another important characteristic of the TK-C751 is its built-in electronic iris feature. This function automatically adjusts the aperture based on the light levels in the scene, ensuring optimal exposure and reducing glare. This is particularly important in outdoor settings where lighting conditions can fluctuate dramatically throughout the day.

The camera’s design contributes to its durability and ease of installation. The compact and lightweight body facilitates easy mounting in a variety of locations. The camera is also equipped with a variety of video output options, including composite video, allowing for compatibility with various recording devices and surveillance systems.

The TK-C751 is also equipped with features like automatic gain control and a selectable NTSC/PAL format switch, providing further flexibility for different application requirements.

In conclusion, the JVC TK-C751 is an excellent choice for anyone seeking a reliable and high-quality camera for surveillance or monitoring. Its advanced features, robust performance, and adaptability to different environments set it apart as a leading option in the professional camera market, ensuring that users can capture high-quality footage efficiently and effectively.