參數(shù)資料
型號(hào): TDA9874H
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, PQFP44
封裝: 14 X 14 MM, 2.20 MM HEIGHT, PLASTIC, SOT-205-1, QFP-44
文件頁數(shù): 4/56頁
文件大?。?/td> 254K
代理商: TDA9874H
1998 Apr 27
4
Philips Semiconductors
Preliminary specification
Digital TV sound demodulator/decoder
TDA9874H
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
Note
1.
See “EBU specification”or equivalent specification.
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
NOM.
MAX.
OVER.
SC1
SC2
M
M
B/G
I
D/K
D/K
mono
A2+
A2
mono
A2
A2*
4.5
4.5/4.724
5.5/5.742
6.0
6.5/6.742
6.5/6.258
15
15
27
27
27
27
25
25
50
50
50
50
50
50
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)
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. MAX. NOM. MAX.
54
100
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
tbf
note 1
117.5 Hz
133
line frequency
=
149.9 Hz
105
line frequency
=
274.1 Hz
line fr57
=
276.0 Hz
line fr57
=
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