LA7386 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LA7386

NTSC Video Signal Processing LSI for VCRs

SANYO -> Panasonic 

LA7386

Continued from preceding page.

Parameter

REC AFC pull-in range 2

[PB Mode Chroma]

PB chroma video output level

PB chroma pin 21 output level

PB ACC characteristics 1

PB ACC characteristics 2

PB killer input level

PB killer chroma output level

PB main converter carrier leak

Burst de-emphasis amount

PB XO output level

PB XO oscillation frequency

variation

SLD detection current 1

Symbol

Conditions

min typ max Unit

∆ fAFC2

In the same manner, after reducing the frequency

of the pulse string until the waveform at pin 20 is

disrupted, then increase the frequency until the

waveform at pin 20 is normal again; that pulse

string frequency is f2

∆fAFC2 = f2 – 15.734 (kHz)

–6.3 –1.0 kHz

Vop-28

Vop-21

ACCP1

ACCP2

VACK-P

VOACK-P

CLP

GBD

VXO-P

∆ fXO

ISLD1

In PB, SP mode, input a continuous wave from

T14A a chroma signal (SP mode, burst 50 mVp-p)

that underwent low-band conversion from a

chroma noise test signal. Input a 50% white

signal from T3A and measure the T28A burst

level

Measure the T21 burst level under the same

conditions as for Vop-28

Input the input chroma level at +6 dB under the

same conditions as for Vop-28 and measure the

T21 burst level, and calculate the ratio with

Vop-21

Input the input chroma level at –6 dB under the

same conditions as for Vop-28 and measure the

T21 burst level, and calculate the ratio with

Vop-21

Lower the input chroma level under the same

conditions as for Vop-28 and measure the input

burst level at the point where T21 chroma output

ceases. (Calculate ratio with standard input of

50 mVp-p)

Use a spectrum analyzer to measure the T28

chroma output level in the killer state described

previously. Calculate ratio with Vop-28.

Monitor T28A with a spectrum analyzer under the

same conditions as for Vop-28 and calculate the

ratio between the 3.58 MHz component and the

4.21 MHz carrier leak component.

From T14A, input a 629 kHz 50 mVp-p

continuous wave; from T3A, input a 50% white

signal, and calculate the ratio between the output

level during the T21 burst interval and the output

level during other intervals

In PB mode, measure the T18 output level with

an FET probe

In PB mode, measure the frequency at T18...f

∆fXO = f – 3579545 (Hz)

In PB mode, with S20: 3 and S19: off, input a

4 MHz 300 mVp-p continuous wave from T33A,

input a 50% white signal from T3A, and measure

the wave peak at T19A

210

170

–0.5

–55

–4.35

480

–7

110

260 310 mVp-p

200 230 mVp-p

+0.5 +0.8 dB

–0.2

dB

–40 dB

–44 –40 dB

–40 –33 dB

–4.6 –4.85 dB

610 750 mVp-p

0

+7

Hz

160 210 µA

ISLD1 = VOS1/1 kΩ

Continued on next page.

No.5472 - 7/13

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