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參數(shù)資料
| 型號： | LA76070 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP52 |
| 封裝： | SDIP-52 |
| 文件頁數(shù)： | 9/27頁 |
| 文件大?。?/td> | 308K |
| 代理商： | LA76070 |
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Continued from preceding page.
No. 5844-17/27
LA76070
Parameter
Symbol
Measurement
Input signal
Measurement procedure
Bus and other conditions
point
Measure the BOUT and ROUT output levels,
Demodulation angle B-Y/R-Y
ANGBR
C-1
calculate the angles of the B-Y and R-Y axes,
and determine ANGBR as
<the R-Y angle> – <the B-Y angle>.
Measure the GOUT output level, calculate the
Demodulation angle B-Y/G-Y
ANGBG
C-1
angle of the G-Y axis, and determine ANGBG
as <the G-Y angle> – <the B-Y angle>
Gradually lower the input signal level, and
Killer operating point
KILL
C-3
measure the input signal level at the point the
output level falls under 150 mV p-p
Chrominance VCO free-running
CIN
Measure the oscillator frequency f, and
frequency
CVCOF
No signal
determine CVCOF from the following formula.
CVCOF = f – 3579545 (Hz)
Gradually lower the input signal subcarrier
Chrominance pull-in range (+)
PULIN +
C–1
frequency starting from 3.57545 MHz +
2000 Hz, and measure the frequency when
the output waveform locks
Gradually raise the input signal subcarrier
Chrominance pull-in range (–)
PULIN –
C–1
frequency starting from 3.57545 MHz –
2000 Hz, and measure the frequency when the
output waveform locks
With Auto Flesh = 0, measure the level that
corresponds to 73° for the BOUT and ROUT
TR22:
output waveforms, and calculate the angle
Auto flesh:
Auto flesh characteristic 73°
AF073
C–4
AF073A.
0*******
With Auto Flesh = 1, determine the angle
TR22:
AF073B in the same way.
Auto flesh:
Calculate AF073 from the following formula.
1*******
AF073 = AF073B – AF073A
With Auto Flesh = 0, measure the level that
corresponds to 118° for the BOUT and ROUT
TR22:
output waveforms, and calculate the angle
Auto flesh:
Auto flesh characteristic 118°
AF118
C–4
AF118A.
0*******
With Auto Flesh = 1, determine the angle
TR22:
AF118B in the same way.
Auto flesh:
Calculate AF118 from the following formula.
1*******
AF118 = AF118B – AF118A
With Auto Flesh = 0, measure the level that
corresponds to 163° for the BOUT and ROUT
TR22:
output waveforms, and calculate the angle
Auto flesh:
Auto flesh characteristic 163°
AF163
C–4
AF163A.
0*******
With Auto Flesh = 1, determine the angle
TR22:
AF163B in the same way.
Auto flesh:
Calculate AF163 from the following formula.
1*******
AF163 = AF163B – AF163A
30
28
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30
15
30
28
30
28
30
28
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