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LA7170 Datasheet(PDF) 2 Page - Sanyo Semicon Device

Part No. LA7170
Description  RF Modulator for UHF Band (Supports SECAM)
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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No. 5675-2/8
LA7170M
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Picture]
Picture modulation
mp
VIN = 1 Vp-p, 100% white
73
80
87
%
Maximum picture modulation
mp max
VIN = 1.5 Vp-p, 100% white
88
93
98
%
SYNC compression
∆(S/V)
VIN = 1 Vp-p, 100% white {1–(S/V)(3/7)} × 100
1.5
5
%
Differential gain
DG
VIN : 5-stair step, mp = 80%, at fourth step
2
5
%
Differential phase
DP
VIN : 5-stair step, mp = 80%, at fourth step
–6
0
+6
deg
SECAM picture modulation
mp SCM
VIN = 1 Vp-p, 100% white S10 : a
88
93
98
%
TSG picture modulation
mp TSG
S9 : off
70
80
90
%
TSG SV ratio
V/S
S9 : off
6.3/3.7
6.8/3.2
7.3/2.7
TSG horizontal period
TS
S9 : off
63.7
64.0
64.3
µs
TSG synchronization pulse width
HS
S9 : off
3.6
4.0
4.4
µs
TSG white signal width
HV
S9 : off
3.6
4.0
4.4
µs
TSG first white rising edge
TV1
S9 : off
22
24
26
µs
TSG second white rising edge
TV2
S9 : off
38
40
42
µs
[Sound]
FM sound modulation
Rank A
73
81
89
%
Rank B
ms FM
81
90
99
%
Rank C
90
100
110
%
Rank D
99
110
121
%
Rank E
109
121
133
%
Interchannel FM sound modulation ratio
∆ms FM ms FM ratio with S10: off
0.93
0.98
1.03
FM sound distortion
THD FM
S10: b/off; AIN = 1 Vp-p with 1-kHz sine
0.3
1.0
%
wave input
S10: b/off; VIN = 1 Vp-p color bar; AIN with
FM sound signal-to-noise ratio
S/NFM
1-kHz sine wave input; ratio of level at AIN =
43
55
dB
1 Vp-p to that at AIN = 0 Vp-p
Maximum FM modulation
ms max
Maximum modulation possible with S10:
400
%
b/off and sound distortion ratio within 3%
AM sound modulation
ms AM
S10: a; AIN = 1 Vp-p with 1-kHz sine wave
43
50
57
%
input
AM sound distortion ratio
THD AM
S10: a; AIN = 1 Vp-p with 1-kHz sine wave
0.5
2
%
input
S10: a; VIN = 1 Vp-p color bar; AIN with 1-kHz
AM sound signal-to-noise ratio
S/N AM
sine wave input; ratio of level at AIN = 1 Vp-p
42
47
dB
to that at AIN = 0 Vp-p
AIN = 1.66 Vp-p with 1-kHz sine wave input;
100% modulation: ±50 kHz; S10: b
Note: AIN = 1 Vp-p normally produces 60%
modulation.
Note: The AM sound items refer to direct AM detection from the sound carrier (fp + sound intercarrier). This device requires the special care associated with
all high-frequency devices.




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