TDA9875 查看數據表（PDF） - Philips Electronics
零件编号
产品描述 (功能)
生产厂家
TDA9875 Datasheet PDF : 92 Pages
| |||
Philips Semiconductors
Digital TV Sound Processor (DTVSP)
Preliminary specification
TDA9875
2.1.1 ANALOG 2-CARRIER SYSTEMS
Table 1 Frequency modulation
STANDARD
M
M
B/G
I
D/K
D/K
SOUND
SYSTEM
mono
A2+
A2
mono
A2
A2*
CARRIER
FREQUENCY
(MHz)
4.5
4.5/4.724
5.5/5.742
6.0
6.5/6.742
6.5/6.26
FM DEVIATION
(kHz)
NOM./MAX./OVER
15/25/50
15/25/50
27/50/80
27/50/80
27/50/80
27/50/80
MODULATION
SC1
mono
1⁄2(L + R)
1⁄2(L + R)
mono
1⁄2(L + R)
1⁄2(L + R)
SC2
−
1⁄2(L − R)
R
−
R
R
BANDWIDTH/
DE-EMPHASIS
(kHz/µs)
15/75
15/75 (Korea)
15/50
15/50
15/50
15/50
Table 2 Identification for A2 systems
PARAMETER
A2/A2*
Pilot frequency
Stereo identification
frequency
54.6875 kHz = 3.5 × line frequency
117.5 Hz = p----i-l--o---t---f--r1--e-3--q--3--u---e---n----c---y-
Dual identification frequency 274.1 Hz = -p---i-l--o---t---f--r--5e---7q----u---e---n----c---y-
AM modulation depth
50%
A2+ (KOREA)
55.0699 kHz = 3.5 × line frequency
149.9 Hz = p----i-l--o---t---f--r1--e-0--q--5--u---e---n----c---y-
276.0 Hz = p----i-l--o---t---f--r--5e---7q----u---e---n----c---y-
50%
2.1.2 2-CARRIER SYSTEMS WITH NICAM
Table 3 NICAM
SC1
STANDARD FREQUENCY
(MHz)
TYPE
MODULATION
INDEX (%)
NOM/MAX.
DEVIATION
(kHz)
NOM./MAX.
SC2
(MHz)
NICAM
DE-EMPHASIS
ROLL-OFF
(%)
NICAM
CODING
B/G
5.5
FM
−
27/50
5.85
J17
40
note 1
I
6.0
FM
−
27/50
6.552
J17
100
note 1
D/K
6.5
FM
−
27/50
5.85
J17
40
not yet
defined
L
6.5
AM
54/100
−
5.85
J17
40
note 1
Note
1. See “EBU specification” or equivalent specification.
1998 Feb 13
4
Share Link: 