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參數資料
| 型號： | LA71578HM |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, QIP-100 |
| 文件頁數： | 40/43頁 |
| 文件大?。?/td> | 1533K |
| 代理商： | LA71578HM |
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LA71598HM
No.A0643-6/44
PB Mode EQ
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
PB EQ
characteristics 1
*Serial-control
GPEQ1
T74
T18
With VIN a CW 4MHz 300mVp-p signal, measure the
input/output response.
1.5
3.0
4.5
dB
PB EQ
2’nd distortion
HPEQ
T74
T18
Measure the second harmonic in the above condition.
-40
-30
dB
PB EQ Low-Trap
characteristics 1
*Serial control
FPEQ1
T74
T18
VIN =300mVp-p
Measure the Low-band Trap frequency and gain.
(Using network analyzer)
Serial
00 (650k)
01 (800k)
10 (1.1M)
11 (500k)
-25
dB
PB EQ High-Trap
characteristics 2
*Serial control
FPEQ2
T74
T18
VIN =300mVp-p
Measure the High-band Trap frequency and gain.
(Using network analyzer)
Serial
00 (10M)
01 ( 9M)
10 ( 8M)
11 ( 7M)
-25
dB
PB Mode Chroma
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
PB chroma video
output level
PAL MODE
PVop-29
T74A
T20A
T29
Input a chroma signal that is a lower frequency
converted chroma noise test signal (SP mode, burst
50mVp-p) to T74A.
Input a 4MHz 300mVp-p sine wave to T74A, and a
50% white signal to T20A.
Measure the burst level on T29.
490
580
670
mVp-p
PB chroma pin 72
output level
Vop-72
T74A
T20A
T72
Measure the burst level with the same conditions
as those for PVop-72.
280
mVp-p
PB ACC
characteristics (1)
ACCP1
T74A
T20A
T72
With the conditions used for PVop-29, increase the
input chroma level by +6dB, measure the burst level
on T72, and calculate the ratio with Vop-72.
+0.5
+0.8
dB
PB ACC
characteristics (2)
ACCP2
T74A
T20A
T72
With the conditions used for PVop-29, decrease the
input chroma level by -6dB, measure the burst level
on T72, and calculate the ratio with Vop-13.
-0.5
-0.2
dB
PB killer-on input level
VACK-P
T74A
T20A
T72
With the conditions used for Vop-29, the input chroma
level until output from T72 cease and measure the
input burst level at that point.
(Calculate the ratio with the standard input 50mVp-p
signal)
-25
dB
PB killer-on chroma
output level
VOACK-P
T74A
T20A
T29
Measure the T29 chroma output with a spectrum
analyzer in the killer state of the previous item.
Calculate its ratio with PVop-29.
-44
-40
dB
PB main converter
carrier leakage
CLP
T74A
T20A
T29
With the conditions used for PVop-29, measure the
T29 with a spectrum analyzer, and calculate the ratio
of the 4.43MHz component and the 5.06MHz carrier
leakage component.
-40
-33
dB
PB XO output level
PAL MODE
VXO-PP
T69A
In PB mode, measure the output level on T69 with an
FET probe.
300
500
700
mVp-p
PB XO oscillator
frequency deviation
PAL MODE
ΔfXOP
T69A
In PB mode, let f be the measured frequency on T69.
ΔfXOP = f-4433619 (Hz)
-9
0
+9
Hz
NTSC
→ PAL
conversion
V axis Burst level
VBNAP
T1A
T10A
T27
Input a chroma signal that is a lower frequency
converted chroma noise test signal (SP mode, burst
100mVp-p) to T1A.
Input a 4MHz 300mVp-p sine wave to T1A, and a
50% white signal to T10A.
Measure the T27-45
° Burst level, and take the ratio
with the PVOP-27.
-2
-1
0
dB
Continued on next page.
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