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參數資料
| 型號： | LA7383 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP36 |
| 封裝： | SDIP-36 |
| 文件頁數： | 11/13頁 |
| 文件大小： | 184K |
| 代理商： | LA7383 |
Continued from preceding page.
Parameter
Symbol
Conditions
min
typ
max
Unit
BGP pulse width for APC ACC
tW(N)
2.5
s
REC AFC pull-in range 1
fAFC1
Input a string of pulses (negative polarity) at
286 mV, 15.7 kHz with a width of 5 s. 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)
+1.0
+7.0
kHz
REC AFC pull-in range 2
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
[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
Continued on next page.
LA7383
No.4032-7/13
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