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参数资料
| 型号： | LA71750EM |
| 厂商： | SANYO SEMICONDUCTOR CO LTD |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封装： | 14 X 20 MM, QFP-100 |
| 文件页数： | 45/46页 |
| 文件大小： | 898K |
| 代理商： | LA71750EM |
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LA71750EM
No.7952-8/46
Continued from preceding page.
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
REC APC pull-in
range (2)
PAL
APC2
SG1
+
SG5
4.433619
A : 300
B : 700
300
T48A
T21
As in the previous item, decrease the CW
frequency until T21 output ceases. Now slowly
increase the CW frequency and let f2 be the
frequency at which the T21 output reappears.
Δ fAPC2 = f2 - 4433619 (Hz)
-350
Hz
VXO2 oscillation level
PAL
PVXO2
SG3
(PAL)
A : 300
B : 700
C : 700
D : 300
T48A
T29
With the 100% chroma signal, measure the
T29 output level with an FET probe.
300
450
700
mVp-p
The ratio of the REC
chroma level and FM
modulator output
level.
PAL
YCRP
SG3
(PAL)
A : 300
B : 700
C : 700
D : 300
T48A
T21
T78
The ratio of 100% chroma level which was
converted to low band and FM modulator
output level
* Serial Gr5 : ****-**00, Gr6 : ****-**01
-1.8
-3.1
-4.4
dB
PB Mode Chroma
Input signal
Input/Output point
Ratings
Parameter
Symbol
Signal
Level
In
Out
Conditions
min
typ
max
Unit
PB chroma video
output level.
VOPPAB
SG6
DC
SG4
(PAL)
300
3.5V
C : 50
D : 117
T79A
T21B
T65
Input a chroma signal that is a lower frequency
converted chroma noise test signal (SP mode,
burst 50mVp-p) to T21B.
Input a FM signal 300mVp-p to T81A.
Measure the burst level on T65.
520
600
680
mVp-p
PB Chroma 2’Fsc
distortion.
VOPHD2C
SG6
DC
SG4
(PAL)
300
3.5V
C : 50
D : 117
T79A
T21B
T65
With the conditions used for VOPPAB,
measure the T65 with a spectrum analyzer,
and calculate the ratio of the 4.43MHz
component and the 8.86MHz component.
-25
dB
PAL SP
PB chroma output
level.
COPPABSP
SG6
DC
SG4
(PAL)
300
3.5V
C : 50
D : 117
T79A
T21B
T25
Measure the burst level on T25 with the same
conditions as those for VOPPAB.
160
190
220
mVp-p
PB main converter
carrier leakage.
CLP506
SG6
DC
SG4
(PAL)
300
3.5V
C : 50
D : 117
T79A
T21B
T25
With the conditions used for VOPPAB,
measure the T25 with a spectrum analyzer,
and calculate the ratio of the 4.43MHz
component and the 5.06MHz carrier leakage
component.
-40
-33
dB
PB ACC
characteristics.
(+6dB)
PACC1
SG6
DC
SG4
(PAL)
300
3.5V
C : 100
D : 234
T79A
T21B
T25
With the conditions used for VOPPAB,
increase the input chroma level by +6dB,
measure the burst level on T25, and calculate
the ratio with COPPABSP.
0.2
0.5
dB
PB ACC
characteristics.
(-6dB)
PACC2
SG6
DC
SG4
(PAL)
300
3.5V
C : 25
D : 58
T79A
T21B
T65
With the conditions used for VOPPAB,
increase the input chroma level by -6dB,
measure the burst level on T25, and calculate
the ratio with COPPABSP.
-0.5
-0.2
dB
PB killer-on input
level.
VIACK
SG6
SG4
(PAL)
T79A
T21B
T65
With the conditions used for VOPPAB,
decrease the input chroma level until output
from T25 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
SG6
SG5
(PAL)
T79A
T21B
T25
Measure the T25 chroma output with a
spectrum analyzer in the killer state of the
previous item. Calculate its ratio with VOPPAC.
-44
-40
dB
XO2 oscillation level
PAL
PXO2
T29
In PB mode, measure the output level on T28
with an FET probe.
300
450
700
mVp-p
PB XO oscillator
frequency deviation
PAL MODE
ΔFXOP
T29
In PB mode, let f be the measured frequency
on T29.
ΔFXOP = f - 4433619 (Hz)
-9
0
9
Hz
Continued on next page.
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