TDA9875A Philips Semiconductors, TDA9875A Datasheet - Page 39

• Manufacturer Part Number: TDA9875A
• Description: Digital TV Sound Processor DTVSP
• Manufacturer: Philips Semiconductors

Philips Semiconductors
10.3.5
Same as for sound carrier 1, except for subaddresses (subaddresses 6 to 8). If the carrier 2 frequency register is used,
it will be for either the second FM sound carrier of a terrestrial or satellite FM program or the NICAM sound carrier.
10.3.6
It is recommended to switch the FM sound mode identification off whenever the received program is not a terrestrial
2-carrier sound. Switching the identification off will reset the associated hardware to a defined state.
Table 21 Subaddress 9 (note 1)
Notes
1. The default setting at power-up is 0000 0000.
Table 22 Identification mode
Table 23 Filter bandwidth channel 1 and channel 2
1999 Dec 20
Digital TV Sound Processor (DTVSP)
7 (MSB)
0 (LSB)
BIT
B7
B4
6
5
4
3
2
1
0
0
1
1
0
0
1
1
C
D
ARRIER
EMODULATOR CONFIGURATION REGISTER
CH1MODE
CH2MOD1
CH2MOD0
FILTBW1
FILTBW0
IDMOD1
IDMOD0
IDAREA
NAME
2
B6
B1
0
1
0
1
0
1
0
1
FREQUENCY REGISTER
extra wide
VALUE
medium
narrow
wide
CH1
1
0
1
0
BANDWIDTH
FILTER
these bits define the response time after which a FM sound mode identification
result may be expected; the longer the time, the more reliable the identification
(see Table 22)
selects FM identification frequencies in accordance with the specification for
Korea
selects frequencies for Europe (B/G and D/K standard)
selects filter bandwidth (see Table 23)
channel 2 receive mode: these bits control the hardware for the second sound
carrier (see Table 24); the NICAM mode employs a wider bandwidth of the
decimation filters than the FM mode
selects the filter bandwidth (see Table 23)
selects the hardware for the first sound carrier to operate in AM mode
FM mode is assumed; this applies to both terrestrial and satellite FM reception
medium
narrow
narrow
wide
CH2
recommended for nominal terrestrial broadcast conditions and
SAT with 2 carriers
recommended only for high-deviation SAT mono carriers
(e.g. obsolete Main channel on Astra)
recommended for moderately overmodulated broadcast conditions
recommended for strongly overmodulated broadcast conditions
39
IDENT MODE
medium
off/reset
DESCRIPTION
slow
fast
FILTER MODES
Product specification
TDA9875A