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參數(shù)資料
| 型號： | LA7191N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Global VHS-format VCR Video Signal Processor |
| 中文描述： | 全球錄影帶格式錄像機視頻信號處理器 |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 146K |
| 代理商： | LA7191N |
Operating Characteristics
at Ta = 25°C, V
CC
= 5.0 V
Parameter
Symbol
Input
Output
Conditions
min
typ
max
Unit
[REC Mode Y]
Current drain REC
I
CCR
When V
CC
= 5 V (when there is no signal),
measure sum of incoming current at pins 35
and 28
V
IN
= 1.0 Vp-p video signal, use VR39 to
adjust T4 output to 0.5 Vp-p
Measure T4 output level when S10 is set to 2
Measure T39 DC voltage in above state
Measure T38 DC voltage in same manner
T34A Measure T34A output level in same manner
T4
V
IN
= 2.0 Vp-p video signal
Measure T4 output level
T4
V
IN
= 0.5 Vp-p video signal
Measure T4 output level
T4
V
IN
= 700 mVp-p LUMI, 600 mVp-p SYNC
Measure T4 SYNC level
T4
V
IN
= 700 mVp-p LUMI, 150 mVp-p SYNC
Measure T4 SYNC level
T32
V
IN
= 1.0 Vp-p video signal,
Measure T32 output pulse wave high value
T32
V
IN
= 1.0 Vp-p video signal,
Measure T32 output pulse width
T32
V
IN
= 1.0 Vp-p video signal, measure delay
time of output SYNC versus input SYNC
T32
Gradually attenuate the input level, measure
input level at point when output pulse width
widens 1 μs or more beyond PWSYR
T34
Measure electric potential for each of the T34
video output sync tip, pedestal, and white
peak, and assign the measured values to
L
SYN
, L
PED
, and L
WHI
, respectively
T34
Measure T34 DC voltage when 5 V is applied
to T33, and assign the measured value to
L
VDR
and calculate the difference with L
SYN
VDR = L
SYN
– L
VDR
T34
Measure T34 DC voltage when 2.7 V is
applied to T33, and assign the measured
value to L
HDR
and calculate the difference
with L
PED
HDR = L
PED
– L
HDR
T34
Measure T34 DC voltage when 1.3 V is
applied to T33, and assign the measured
value to L
WHR
and calculate the difference
with L
WHI
WHR = L
WHI
– L
WHR
T9
Measure T9 DC voltage
T3
V
IN
= white 50% + CW
(15.8 mVp-p) ratio between 32f
H
component
and 32.5f
H
component
T3
V
IN
= standard multiburst signal 1 Vp-p,
2 MHz response to 500 kHz at T3
T3
V
IN
= standard multiburst signal 1 Vp-p,
4.8 MHz response to 500 kHz at T3
T3
V
IN
= standard multiburst signal 1 Vp-p,
2 MHz response to 500 kHz at T3, T22A: 5 V
T3
V
IN
= standard multiburst signal 1 Vp-p,
4.8 MHz response to 500 kHz at T3, T22A:
5 V.
T40
No input, use VR42 to adjust output
frequency to 4 MHz, measure output level
T40
Ratio of 8 MHz component to 4 MHz in the
above state
95
120
145
mA
AGC adjustment
C
AGC
T37A
VCA control characteristics
AGC adjustment voltage
AGC detection voltage
EE output level
AGC Output 1
VCA
V
AGC
V
AD
V
EE
AGC 1
T37A
T37A
T37A
T37A
T37A
T4
T39
T38
0.48
3.2
1.2
0.95
500
0.5
3.4
1.4
1.00
540
0.52
3.6
1.6
1.05
560 mVp-p
Vp-p
V
V
Vp-p
AGC Output 2
AGC 2
T37A
470
490
500 mVp-p
AGC Output 3
AGC 3
T37A
135
150
165 mVp-p
AGC Output 4
AGC 4
T37A
70
85
100 mVp-p
Sync separation output level
V
SYR
T37A
4.0
4.2
4.4
Vp-p
Sync separation output
pulse width
Sync separation output
leading edge delay time
Sync separation threshold
level
PW
SYR
T37A
4.4
4.7
5.0
μs
T
SYR
T37A
0.6
0.8
1.0
μs
TH
SYR
T37A
–18
–14
dB
Sync tip level,
pedestal level,
white level measurement
(REC)
Pseudo V insertion level
(REC)
L
VOR
T37A
VDR
T37A
–80
0
+80
mV
Pseudo H insertion level
(REC)
HDR
T37A
–200
–100
0
mV
White insertion level (REC)
WHR
T37A
150
250
350
mV
VCA detection voltage
REC YNR operation
EP/LP
V
VCA
VR-YNR
T37A
T37A
3.1
3.5
3.4
4.5
3.7
5.5
V
dB
Y-LPF frequency
characteristics
YLPF 1
T37A
0.2
0.7
1.2
dB
YLPF2
T37A
–4.5
–3.5
–2.5
dB
YLPF3
T37A
0.4
0.9
1.4
dB
YLPF4
T37A
–5.0
–4.0
–3.0
dB
FM modulator output level
V
FM
0.8
1.0
1.2
Vp-p
FM modulator secondary
distortion
H
MOD
–40
–35
dB
Continued on next page.
LA7191N
No. 5471 - 2/11
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