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

Symbol

Conditions

min typ max Unit

REC ACC characteristics 2

REC ACC killer input level

ACCR2 VIN = standard color bar signal (1 Vp-p),

–0.5 –0.1

dB

input –6 dB chroma signal level only, measure

T14A burst level, and calculate ratio with VOR-14

VACCK-ON VIN = standard color bar signal (1 Vp-p),

lower the chroma signal, and measure the input

–30 –27 –24 dB

burst level at the point where output at T14A

ceases, and calculate the ratio with the standard

input level

REC ACC killer output level

VOACCK Use a spectrum analyzer to measure the output

level at T14A in the killer state described

–60 –50 dB

previously; ratio with VOR-14

Input level for REC ACC killer VACCK–OFF Starting from the killer state described previously, –24 –21 –18 dB

return

gradually raise the input chroma level and

measure the input burst level when output is

generated at T14A and calculate the ratio with the

standard input level

VXO control sensitivity

SVXO

Measure the pin 16 DC voltage when a standard

3.3

4.9

7.5 Hz/mV

color bar signal (1 Vp-p) is input ... VO

Measure the frequency at T18A when V0 is

applied to pin 16 from the external power

supply...f1

Measure the frequency at T18A when VO + 10

mV is applied to pin 16 ...f2

SVXO =

f2 – f1 Hz/mV

10

REC APC pull-in range 1

REC APC pull-in range 2

BGP delay time for APC ACC

BGP pulse width for APC ACC

∆ fAPC1 Input a 50% white signal overlapping with a

350 440

Hz

3.5795 MHz, 300 mVp-p continuous wave. After

confirming that there is output at T14A, increase

the frequency of the CW until the output at T14A

stops, and then gradually reduce the frequency

until output appears again at T14A; that CW

frequency is f1.

∆fAPC1 = f1 – 3579545 (Hz)

∆ fAPC2

In the same manner, reduce the frequency of the

CW until the output at T14A stops, and then

–900 –350 Hz

gradually increase the frequency until output

appears again at T14A; that CW frequency is f2.

∆fAPC2 = f2 – 3579545 (Hz)

tD(N)

Input a standard color bar signal overlapping with

4.8

µs

a 3.98 MHz, 300 mVp-p continuous wave, and

measure waveforms at T26 and T16.

tW(N)

2.5

µs

REC AFC pull-in range 1

∆fAFC1 Input a string of pulses (negative polarity) at

+1.0 +7.0

kHz

286 mV, 15.7 kHz with a width of 5 µs. After

increasing the frequency of the pulse string until

the waveform at pin 20 is disrupted, then reduce

the frequency until the waveform at pin 20 is

normal again; that pulse string frequency is f1

∆fAFC1 = f1 – 15.734 (kHz)

Continued on next page.

No.5472 - 6/13

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