TDA9875AH Philips Semiconductors, TDA9875AH Datasheet - Page 40

• Manufacturer Part Number: TDA9875AH
• Description: Digital TV Sound Processor DTVSP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 24 Channel 2 receive mode
10.3.7
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
1999 Dec 20
7 (MSB)
0 (LSB)
Digital TV Sound Processor (DTVSP)
BIT
B6
6
5
4
3
2
1
0
0
0
0
1
B2
0
0
B3
0
0
1
FM
DE
ADEEM2
ADEEM1
NAME
-
EMPHASIS REGISTER
B6
B5
B4
B2
B1
B0
B5
0
0
1
1
0
B1
0
0
B2
VALUE
0
1
0
B4
1
0
1
0
0
1
0
1
0
B0
0
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).
The adaptive de-emphasis is off.
Time constant selection for FM de-emphasis (see Table 26).
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).
The adaptive de-emphasis is off.
Time constant selection for FM de-emphasis (see Table 27).
40
75 s (M standard)
DE-EMPHASIS
DESCRIPTION
50 s (Europe)
CHANNEL 2
DE-EMPHASIS
50 s (Europe)
NICAM
60 s
J17
FM
AM
off
60 s
Product specification
TDA9875A