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LA7386 Datasheet(PDF) 7 Page - Sanyo Semicon Device

Part No. LA7386
Description  NTSC Video Signal Processing LSI for VCRs
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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Continued from preceding page.
Parameter
Symbol
Conditions
min
typ
max
Unit
REC AFC pull-in range 2
βˆ† 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
βˆ†fAFC2 =f2 – 15.734 (kHz)
–6.3
–1.0
kHz
[PB Mode Chroma]
PB chroma video output level
Vop-28
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
210
260
310
mVp-p
PB chroma pin 21 output level
Vop-21
Measure the T21 burst level under the same
conditions as for Vop-28
170
200
230
mVp-p
PB ACC characteristics 1
ACCP1
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
+0.5
+0.8
dB
PB ACC characteristics 2
ACCP2
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
–0.5
–0.2
dB
PB killer input level
VACK-P
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)
–55
–40
dB
PB killer chroma output level
VOACK-P
Use a spectrum analyzer to measure the T28
chroma output level in the killer state described
previously. Calculate ratio with Vop-28.
–44
–40
dB
PB main converter carrier leak
CLP
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.
–40
–33
dB
Burst de-emphasis amount
GBD
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
–4.35
–4.6
–4.85
dB
PB XO output level
VXO-P
In PB mode, measure the T18 output level with
an FET probe
480
610
750
mVp-p
PB XO oscillation frequency
variation
βˆ† fXO
In PB mode, measure the frequency at T18...f
βˆ†fXO = f – 3579545 (Hz)
–7
0
+7
Hz
SLD detection current 1
ISLD1
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
ISLD1 = VOS1/1 kΩ
110
160
210
Β΅A
Continued on next page.
LA7386
No.5472 - 7/13




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