White spot compensation

 

 

CCDs have the general characteristic that white spots appear on the screen when the CCD is

operated at high temperatures or when they are used with a slow shutter speed.

This unit has a built-in white spot compensation function to reduce these white spots.

(The number and the size of the white spots changes according to the use temperature, the

shutter speed, etc. Furthermore, there is a limit on the number of white spots that can be

compensated.)

 

 

Operation method

1.

Attach a lens cap or similar.

MA I NT ENA NC E

CCD S P OT . .

 

• Prevent entry of light to the CCD.

 

• Switch on the camera power supply

 

 

 

 

and wait for at least 30 minutes.

OTHERS

 

Specifications

 

Image pickup device:

1/2 type IT CCD, 752 (H) 582 (V)

Synchronization method:

Internal, Line lock, Full Genlock

Scanning frequency:

(H) 15.625 kHz, (V) 50 Hz

Resolution:

480 TV lines (H)

VIDEO OUT:

Composite video signal 1 V (p-p), 75 (BNC)

Y/C OUT:

Y: 1 V(p–p), 75

Video S/N ratio:

C: 0.3 V(p–p), 75

50 dB (AGC OFF)

Minimum required illumination:

0.6 lx (50 %, F1.2, AGC 20 dB)

 

0.3 lx (50 %, F1.2, AGC 20 dB, LOLUX MODE)

 

0.3 lx (25 %, F1.2, AGC 20 dB)

 

0.15 lx (25 %, F1.2, AGC 20 dB, LOLUX MODE)

 

0.019 lx (50 %, F1.2, AGC 20 dB, SENSE UP 32)

C CD

S P OT

C ANCE L

EX E CUTE

h e a t

u p 3 0 m i n

i n

a d v a n c e

n e e d

L e n s – c a p

t o

e x e c u t e

S P OT SCAN OK

2.

Display the MAINTENANCE

 

screen.

 

• Confirm that the cursor (>) is at the item

 

CCD SPOT.

3.

Press the SET button.

 

• The CCD SPOT screen will be dis-

 

played.

 

• If you do not want to perform white spot

 

compensation, move the cursor (>) to

 

CANCEL and press the SET button.

4.

Move the cursor (>) to EXECUTE.

5.

Press the SET button.

 

• White spot compensation will operate.

 

(“SPOT SCAN OPERATION” is dis-

 

played during operation.)

6.

Confirm the display.

 

• When white spot compensation has

 

been performed correctly, “SPOT

 

SCAN OK” is displayed for about 5

 

seconds, and then return is made to

 

the CCD SPOT screen.

 

• When “SPOT SCAN ERROR: HIGH

 

LIGHT” is displayed, check that no light

 

enters into the CCD.

 

 

0.01 lx (50 %, F1.2, AGC 20 dB, LOLUX MODE, SENSE UP 32)

Communication:

 

RS-422A or RS-485 (switchable)

 

 

 

 

9600 bit/s

 

 

 

 

Lens mount:

 

C/CS mount

 

 

 

Power supply and power consumption: TK-C1480BE

AC 24 V ` 50 Hz/60 Hz, DC 12 V

500 mA

---

 

 

TK-C1481BEG

AC220 V to AC240 V `, 50 Hz/60 Hz, 75 mA

Ambient temperature:

 

–10 °C to 50 °C (operation)

 

 

 

 

0 °C to 40 °C (recommended)

 

 

Mass:

 

TK-C1480BE

 

600 ˝

 

 

 

 

TK-C1481BEG

835 ˝

 

 

Accessory:

 

Instructions

2 Ferrite core

1

 

 

4P plug

1

 

 

DIMENSIONS (Unit: mm)

 

 

 

 

 

 

 

70

 

 

 

 

149

 

 

39

U1-32

 

 

 

138

 

 

 

 

55

63

 

 

 

 

35

 

 

 

 

 

 

 

42

 

 

 

 

 

 

 

71

 

 

 

 

 

 

 

 

 

 

 

 

1/4-20UNC

 

 

7.

Press the MENU button.

 

• Return to the MENU screen will be

 

made.

41 Design and specifications are subject to change without notice.

E-38

E-39

Page 42
Image 42
JVC TK-C1460B instruction manual Vp-p, 75 Ω, TK-C1481BEG, 835 ˝ Accessory