參數(shù)資料
型號(hào): TDA9874APS
廠商: NXP SEMICONDUCTORS
元件分類: 接收器
英文描述: Digital TV sound demodulator/decoder
中文描述: AM/FM, AUDIO DEMODULATOR, PDIP42
封裝: 0.600 INCH, SHRINK, PLASTIC, MS-020, SOT-270-1, DIP-42
文件頁(yè)數(shù): 4/68頁(yè)
文件大小: 231K
代理商: TDA9874APS
1999 Dec 03
4
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874A
2.1.1
A
NALOG
2-
CARRIER SYSTEMS
Table 1
Frequency modulation
Table 2
Identification for A2 systems
2.1.2
2-
CARRIER SYSTEMS WITH
NICAM
Table 3
NICAM
Notes
1.
2.
See “EBU NICAM 728 specification”or equivalent specification.
Not yet officially defined.
STANDARD
SOUND
SYSTEM
CARRIER
FREQUENCY
(MHz)
FM DEVIATION (kHz)
MODULATION
BANDWIDTH/
DE-EMPHASIS
(kHz/
μ
s)
15/75
15/75 (Korea)
15/50
15/50
15/50
15/50
15/50
NOM.
MAX.
OVER.
SC1
SC2
M
M
B/G
I
D/K (2)
D/K (1)
D/K (3)
mono
A2
A2
mono
A2
A2
A2
4.5
15
15
27
27
27
27
27
25
25
50
50
50
50
50
50
50
80
80
80
80
80
mono
1
2
(L + R)
1
2
(L + R)
mono
1
2
(L + R)
1
2
(L + R)
1
2
(L + R)
4.5/4.724
5.5/5.742
6.0
6.5/6.742
6.5/6.258
6.5/5.742
1
2
(L
R)
R
R
R
R
PARAMETER
A2; A2*
A2+ (KOREA)
Pilot frequency
Stereo identification frequency
54.6875 kHz = 3.5
×
line frequency
55.0699 kHz = 3.5
×
line frequency
Dual identification frequency
AM modulation depth
50%
50%
STANDARD
SC1
SC2
(MHz)
NICAM
DE-
EMPHASIS
ROLL-
OFF (%)
NICAM
CODING
FREQUENCY
(MHz)
TYPE
MODULATION
INDEX (%)
DEVIATION
(kHz)
NOM.
54
MAX.
100
NOM.
MAX.
B/G
I
D/K
L
5.5
6.0
6.5
6.5
FM
FM
FM
AM
27
27
27
50
50
50
5.85
6.552
5.85
5.85
J17
J17
J17
J17
40
100
40
40
note 1
note 1
note 2
note 1
117.5 Hz
line f133
=
149.9 Hz
line f105
=
274.1 Hz
57
line frequency
=
276.0 Hz
57
line frequency
=
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