參數(shù)資料
型號: TDA9875AH/V2,557
廠商: NXP SEMICONDUCTORS
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝: PLASTIC, QFP
文件頁數(shù): 35/96頁
文件大?。?/td> 324K
代理商: TDA9875AH/V2,557
1999 Dec 20
40
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
Table 24 Channel 2 receive mode
10.3.7
FM DE-EMPHASIS REGISTER
This register is used to select the proper de-emphasis characteristics as appropriate for the standard of the received
carrier. Bits B3 to B0 apply to sound carrier 1, bits B7 to B4 apply to sound carrier 2.
In the event of A2 reception, both groups must be set to the same characteristics.
Table 25 Subaddress 10 (note 1)
Note
1. The default setting at power-up is 0000 0000.
2. The FM de-emphasis gain is 0 dB at 40 Hz.
Table 26 De-emphasis sound carrier 2
Table 27 De-emphasis sound carrier 1
B3
B2
CHANNEL 2
00
FM
01
AM
1
0
NICAM
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
ADEEM2
1
Activates the adaptive de-emphasis function, which is required for certain satellite
FM channels. The standard FM de-emphasis must then be set to 75
s (note 2).
0
The adaptive de-emphasis is off.
6B6
Time constant selection for FM de-emphasis (see Table 26).
5B5
4B4
3
ADEEM1
1
Activates the adaptive de-emphasis function, which is required for certain satellite
FM channels. The standard FM de-emphasis must then be set to 75
s (note 2).
0
The adaptive de-emphasis is off.
2B2
Time constant selection for FM de-emphasis (see Table 27).
1B1
0 (LSB)
B0
B6
B5
B4
DE-EMPHASIS
000
50
s (Europe)
001
60
s
010
75
s (M standard)
011
J17
100
off
B2
B1
B0
DE-EMPHASIS
000
50
s (Europe)
001
60
s
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