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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)： | 4/11頁 |
| 文件大?。?/td> | 146K |
| 代理商： | LA7191N |
Continued from preceding page.
Parameter
Symbol
L
DEM
Input
Output
L
DEM
=V
DEM4
– (V
DEM6
+ V
DEM2
)/2
V
DEM6
– V
DEM2
Conditions
min
–3.5
typ
0
max
+3.5
Unit
%
FM demodulation linearity
x 100
Carrier leak
CL
T39A
T3
V
IN
= 300 mVp-p, f = 4 MHz
Ratio between 4 MHz component of T3 and
S
DEM
T28A V
IN
= white 50% + CW (15.8 mVp-p)
Ratio between 32f
H
component and 32.5f
H
component
T28A V
IN
= white 50% + CW (15.8 mVp-p)
Ratio between 32f
H
component and 32.5f
H
component
T34A Apply V
IN
= 0.5 Vp-p video signal to pin 4,
and determine ratio between T34A output
level and input level
T34A V
IN
= white 50% + CW
(f = 1 MHz, 158 mVp-p)
measure input/output response, difference
with GPB
T34A f = 1 MHz, 50 mVp-p
T34A f = 1.5 MHz, 158 mVp-p
T34A f = 1.5 MHz, 50 mVp-p
T34A f = 1.5 MHz, 15.8 mVp-p
T34A f = 2 MHz, 158 mVp-p
–40
–35
dB
PB YNR characteristics
LP/EP
GP-YNR
T4A
–11
–9
–7
dB
PB LNC characteristics
SP
GP-LNC
T4A
–7.0
–5.5
–4.0
dB
Playback through gain
G
PB
T4A
4.0
5.5
7.0
dB
Nonlinear de-emphasis
characteristics
GNL
DEEM1
T4A
–2.8
–1.8
–0.8
dB
GNL
DEEM2
G
WNC1
G
WNC2
G
WNC3
G
PC
T4A
T4A
T4A
T4A
T4A
–5.0
–1.3
–4.5
–10.5
1.2
–4.0
–0.8
–3.5
–9.0
1.7
–3.0
–0.3
–2.5
–7.5
2.2
dB
dB
dB
dB
dB
Noise canceller
characteristics
PIC-CTL center response
characteristics
PIC-CTL hard response
characteristics
PIC-CTL soft response
characteristics
Nonlinear de-emphasis
characteristics SP
Sync tip level,
pedestal level,
white level measurement
(PB)
G
PH
T4A
T34A f = 2 MHz, 158 mVp-p
7.0
8.0
10.0
dB
G
PS
T4A
T34A f = 2 MHz, 158 mVp-p
–10.0
–8.0
–7.0
dB
NLDE-SP
T4A
T34A Same as GNL
DEEM2
–5.0
–4.0
–3.0
dB
L
VOR
T4A
T34
With V
IN
= white 100% and T34A at 1.0
Vp-p, measure electric potential for each of
the pin 34 video output sync tip, pedestal,
and white peak, and assign the measured
values to L
SYN
, L
PED
, and L
WHI
, respectively
Measure pin 34 DC voltage when 5 V is
applied to pin 33, and assign the measured
value to L
VDP
, and calculate the difference
with L
SYN
VDP = L
SYN
– L
VDP
Measure pin 34 DC voltage when 2.7 V is
applied to pin 33, and assign the measured
value to L
HDP
, and calculate the difference
with L
PED
HDP = L
PED
– L
HDP
Measure pin 34 DC voltage when 1.3 V is
applied to pin 33, and assign the measured
value to L
WHP
, and calculate the difference
with L
WHI
WHP = L
WHI
– L
WHP
V
IN
= 0.5 Vp-p video signal, pin 32 output
pulse wave high value
V
IN
= 0.5 Vp-p video signal, T32 output pulse
width
V
IN
= 0.5 Vp-p video signal, measure delay
time of output SYNC versus input SYNC
Measure DC level of T30 in REC mode
Pseudo V insertion level
(PB)
VDP
T4A
T34
–80
0
+80
mV
Pseudo H insertion level
(PB)
HDP
T4A
T34
–300
–200
–100
mV
White insertion level (PB)
WHP
T4A
T34
20
120
220
mV
Sync separation output level
V
SYP
T4A
T32
4.0
4.2
4.4
Vp-p
Sync separation output
pulse width
Sync separation output
leading edge delay time
4.2 V regulator operation
check
[REC Mode Chroma]
REC chroma low-band
conversion output level
Burst emphasis amount
(NTSC mode)
PW
SYP
T4A
T32
4.4
4.7
5.0
μs
T
SYP
T4A
T32
0.9
1.1
1.3
μs
V
REG
T30
3.95
4.15
4.35
VDC
V
OR-15
T37A
T15A V
IN
= standard color bar signal (1 Vp-p),
measure burst level at T15A
T15A V
IN
= standard color bar signal (1 Vp-p)
(SP/EP) and on (LP)
120
160
200
mVp-p
GBE
T37A
5.5
6.0
6.5
dB
Continued on next page.
LA7191N
No. 5471 - 4/11
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