參數(shù)資料
型號(hào)： 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(jī)視頻信號(hào)處理器
文件頁(yè)數(shù)： 3/11頁(yè)
文件大小： 146K
代理商： LA7191N
Continued from preceding page.
Parameter
Symbol
S
MOD
Input
Output
T4
Conditions
min
1.6
typ
2.0
max
2.4
Unit
MHz/V
FM modulator modulation
sensitivity
T40
Measure amplitude of change in output
frequency when 2.6 V DC or 3.1 V DC is
applied to T4, 2 x (f3.1 – f2.6)
Measure output frequency when 2.85 V DC
applied to T4,
L
MOD
=f2.85 – (f3.1 + f2.6)/2
S
MOD
Measure amplitude of change in output
frequency when SW41B is off and SW41A is
switched from on to off
Measure amplitude of change in output
frequency when SW41B is on and SW41A is
switched from on to off
V
IN
= 0.5 Vp-p 10 kHz sine wave
Measure ratio of levels of input and output
amplitude at T5
V
IN
= 158 mVp-p 2 MHz sine wave
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 50 mVp-p 2 MHz sine wave
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 15.8 mVp-p 2 MHz sine wave
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 15.8 mVp-p 2 MHz sine wave
Measure output amplitude at T5 in edit mode,
difference with G
EMPH
V
IN
= 500 mVp-p 2 MHz
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 158 mVp-p 2 MHz
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 50 mVp-p 2 MHz
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 50 mVp-p 200 kHz sine wave
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 50 mVp-p 2 MHz
Measure ratio of levels of T5 and T4,
difference with G
EMPH
V
IN
= 500 mVp-p white 100% video signal
Measure white clipping level at T5
V
IN
= 500 mVp-p white 100% video signal
Measure dark clipping level at T5
Same as G
NLEMP3
FM modulator linearity
L
MOD
T4
T40
x 100
–2
0
+2
%
1/2 f
H
carrier shift
CS1
T40
6.8
7.8
9.5
kHz
CS2
T40
6.8
7.8
9.5
kHz
Emphasis gain
G
EMPH
T4A
T5
–0.5
0
+0.5
dB
Detail enhancer
characteristics
G
ENH1
T4A
T5
0.9
1.4
1.9
dB
G
ENH2
T4A
T5
2.2
3.2
4.2
dB
G
ENH3
T4A
T5
4.0
5.0
6.0
dB
G
ENH4
T4A
T5
1.8
2.8
3.8
dB
Nonlinear emphasis
characteristics
G
NLEMP1
T4A
T5
0.5
1.4
2.3
dB
G
NLEMP2
T4A
T5
2.6
3.8
5.2
dB
G
NLEMP3
T4A
T5
4.9
6.4
7.9
dB
Main linear emphasis
characteristics
G
ME1
T4A
T5
4.9
5.2
5.5
dB
G
ME2
T4A
T5
13.1
13.6
14.1
dB
White clipping level
L
WC
T4A
T5
186
193
200
%
Dark clipping level
L
DC
T4A
T5
–60
–55
–50
%
Non-linear emphasis
characteristics SP
[PB Mode Y]
Current drain PB
NLE-SP
T4A
T5
3.0
4.0
5.0
dB
I
CC
P
Incoming current at pins 35 and 28 when
V
CC
= 5.0 V
T34A T39A: 4 MHz, 300 mVp-p sine wave
T4A: 0.5Vp-p video signal
T34A: time from when input went to 0 until
T34A output returned, SW10
→
1
T12
T39A: 4 MHz, 300 mVp-p sine wave
T4A: 0.5Vp-p video signal
T39A: Input/output response when 5H have
elapsed after input went to 0, SW10
→
3
T3
V
IN
=300 mVp-p, f = 4 MHz, Output DC
voltage
T3
V
IN
= 300 mVp-p, f = 2 MHz, V
DEM2
V
IN
= 300 mVp-p, f = 6 MHz, V
DEM6
Calculate S
DEM
= (V
DEM6
– V
DEM2
)/4
125
155
185
mA
Dropout compensation
period
T
DOC
T39A
T4A
0.35
0.5
0.65
ms
DOC loop gain
GDOC
T39A
T4A
–1.0
0
+1.0
dB
FM demodulation voltage
V
DEM4
T39A
1.5
2.0
2.5
V
FM demodulation sensitivity
S
DEM
T39A
0.36
0.45
0.54
V/MHz
Continued on next page.
LA7191N
No. 5471 - 3/11
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