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參數資料
| 型號： | LA71730EM |
| 廠商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | 14 X 20 MM, QFP-100 |
| 文件頁數： | 16/19頁 |
| 文件大小： | 819K |
| 代理商： | LA71730EM |
LA71730EM
No.7951-6/47
Y-FM
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
FM Modulator Carrier
Frequency
(expect M mode)
FCARN
T78A
Measure the output frequency on T78A with no
input.
3.73
3.83
3.93
MHz
FM Modulator
Secondary distortion
(expect M mode)
HCAR
T78A
Measure the second distortion with the above
state
-40
-35
dB
1/2 f h Carrier shift
FCS
SG8
0/5V
T70A
T78A
FCARN in T70 = 5V and the difference in FCARN
in T70 = 0V are found in the same measurement
as FCARN.
6.5
8.2
9.5
kHz
FM modulator
deviation
(except M mode)
FDEVN
SG1
A : 300
B : 700
T48A
T78A
With VIN a white 100% signal measure the
deviation on T78A
0.95
1
1.05
MHz
FM Modulator
Linearity
LMOD
SG8
2.6V
2.85V
3.1V
T74A
T78A
Let F2.85 be the output frequency when
2.85VDC is applied to T78A.
LMOD =
×100
-2
0
2
%
FM Modulator Carrier
Frequency (M mode)
FCARM
SG1
T78A
Measure the output frequency on T78A with no
input.
3.38
3.48
3.58
MHz
FM modulator
deviation (M mode)
FDEVM
SG1
A : 286
B : 714
T48A
T78A
With VIN a white 100% signal measure the
deviation on T78A
0.95
1
1.05
MHz
Total Output Level of
PB-Y
(expect M mode)
TGPBN
SG6
A : 300
T79A
T65
Input the PAL signal that FM modurated (DEV =
1MHz) has a white signal 100% to T79A, and
measure the amplitude of T65.
1.95
2.05
2.15
Vp-p
Total Output Level of
Over All Y
(expect M mode)
TGRPN
TGPBN×FDEVN
1.95
2.05
2.15
Vp-p
Total Output Level of
PB-Y (M mode)
TGPBM
SG6
A : 300
T79A
T65
Input the NTSC signal that FM modurated (DEV
= 1MHz) has a white signal 100% to T79A, and
measure the amplitude of T65.
1.95
2.05
2.15
Vp-p
Total Output Level of
Over All Y
(M mode )
TGRPM
TGPBM×FDEVM
1.95
2.05
2.15
Vp-p
FM Demodulator
Linearity
LDEM
SG5
300
T79A
T74
Input a SIN wave (3MHz, 4.5MHz, 6MHz) from
T79A.
Measure the average DC electric potential of the
SIN wave of T74.
DC in 3MHz, DC in V3, 4.5MHz, DC in V4.5,
6MHz, as V6,
LDEM =
×100
-3.5
0
3.5
%
FM Demodurator
Leakage
CL
SG5
(4MHz)
DC
300
PPSLD
T79A
T23
T74
Add the voltage of PPSLD that it was measured
in T23, and the SIN wave of 4MHz is inputted
from T79A.
Measure the 4MHz element f4 of the SIN wave of
T74.
CL = 20log (f4/500mVp-p).
-30
dB
DOC Compensation
Period
TDOC
SG1
SG6
A : 150,
B : 350,
A : 300
→0
T74A
T79A
T65
Input a white signal to T74A 100%.
Cut signal course to 43 PIN from 46 PIN.
The white signal of T65 measures the time until it
reverts after the SIN wave of 4MHz is inputted to
T79A and this SIN wave is stopped.
10.5
12.5
14.5
H
DOC Compensation
Level
GDOC
SG1
SG6
A : 150,
B : 350,
B : 300
→0
T74A
T79A
T65
Measure the amplitude VAF of T65 after 5H, and
calculate it at the next type in the measurement
of TDOC after the amplitude VBF of T65 in front
of 10H which a SIN wave is stopped at and a SIN
wave are stopped.
GDOC = 20log (VAF/VBF).
-1.5
0
1.5
dB
f2.85-(f3.1+f2.6)/2
f3.1-f2.6
V4.5-(V3+V6)/2
V6-V3
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