LA76850 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA76850

Black & White Television IC

SANYO -> Panasonic 

Video Block Test Conditions

Input signal

Video signal input

1DC voltage

Symbol

VIN1DC

Test point

28

LA76850

Input signal

L-100

Test method

Input signals to pin 28 and measure the voltage of

the pedestal.

Bus conditions

VIDEO SW:1

Video signal input

VIN1AC

1 AC voltage

28

Pin 28 recommended input level

Video overall gain

(Contrast max)

Contrast

adjustment

characteristics

(normal/max)

Contrast

adjustment

characteristics

(min/max)

Video frequency

Characteristics 1

(NTSC)

CONT127

CONT63

CONT0

BW1

L-50

17

L-50

17

L-50

17

L-CW

17

Video frequency

Characteristics 2

(PAL)

Chroma trap amount

PAL

BW2

CtraPP

L-CW

17

L-CW

17

Chroma trap amount

NTSC

CtraPN

L-CW

17

DC transmission

amount

ClampG1

L-0

17

L-100

Sharpness variable

range (PAL)

Sharp32T2

L-CW

17

(max)

Sharp63T2

L-CW

17

(min)

Sharp0T2

L-CW

17

Measure the output signal’s 50IRE amplitude

(CNTHB Vp-p) and calculate

CONT127 = 20log (CNTHB/0.357).

Measure the output signal’s 50IRE amplitude

(CNTCB Vp-p) and calculate

CONT63 = 20log (CNTCB/0.357).

CONTRAST:

1111111

CONTRAST:

0111111

Measure the output signal’s 50IRE amplitude

(CNTLB Vp-p) and calculate

CONT0 = 20log (CNTLB/0.357).

CONTRAST:

0000000

With the input signal’s continuous

Wave = 100kHz, measure the output signal’s

continuous wave amplitude (PEAKDC Vp-p).

With the input signal’s continuous

wave = 1.8MHz, measure the output signal’s

continuous wave amplitude (CW1.8 Vp-p).

Calculate BW1 = 20Log (CW1.8/PEAKDC).

With the input signal’s continuous

wave = 2.2MHz, measure the output signal’s

continuous wave amplitude (CW2.2 Vp-p).

Calculate BW2 = 20Log (CW2.2/PEAKDC).

With the input signal’s continuous

wave = 4.43MHz, measure the output signal’s

continuous wave amplitude (F0P Vp-p).

Calculate CtraP = 20Log (F0P/PEAKDC).

With the input signal’s continuous

wave = 3.58MHz, measure the output signal’s

continuous wave amplitude (F0N Vp-p).

Calculate CtraN = 20Log (F0N/PEAKDC).

Measure the output signal’s 0IRE DC level

(BRTPL V).

Measure the output signal’s 0IRE DC level

(DRVPH V) and 100IRE amplitude (DRVH Vp-p)

and calculate ClampG = 100 ×

(1+(DRVPH - BRTPL)/DRVH).

With the input signal’s continuous

wave = 2.7MHz, measure the output signal’s

continuous wave amplitude (F02S32 Vp-p).

Calculate Sharp32T3 = 20Log

(F02S32/PEAKDC).

With the input signal’s continuous

wave = 3MHz, measure the output signal’s

continuous wave amplitude (F02S63 Vp-p).

Calculate Sharp63T2 = 20Log

(F02S63/PEAKDC).

With the input signal’s continuous

wave = 3MHz, measure the output signal’s

continuous wave amplitude (F02S0 Vp-p).

Calculate Sharp0T2 = 20Log (F02S0/PEAKDC).

FILTER SYS: 0000

SHARPNESS:

000000

FILTER SYS: 0010

SHARPNESS:

000000

FILTER SYS: 010

Sharpness: 000000

FILTER SYS: 000

Sharpness: 000000

Brightness:

0000000

CONTRAST:

1111111

Brightness:

0000000

Contrast:

1111111

DCREST = 00

BLK.ST.DEF = 1

WPL = 0

Filter Sys:0010

Sharpness: 100000

Filter Sys:0010

Sharpness: 111111

Filter Sys:0010

Sharpness: 000000

Continued on next page.

NoA0017-14/31

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