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參數(shù)資料
| 型號(hào)： | 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)： | 33/96頁 |
| 文件大小： | 324K |
| 代理商： | TDA9875AH/V2,557 |
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1999 Dec 20
39
Philips Semiconductors
Product specication
Digital TV Sound Processor (DTVSP)
TDA9875A
10.3.5
CARRIER 2 FREQUENCY REGISTER
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
DEMODULATOR CONFIGURATION REGISTER
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 Identication mode
Table 23 Filter bandwidth channel 1 and channel 2
BIT
NAME
VALUE
DESCRIPTION
7 (MSB)
IDMOD1
these bits dene the response time after which a FM sound mode identication
result may be expected; the longer the time, the more reliable the identication
(see Table 22)
6
IDMOD0
5
IDAREA
1
selects FM identication frequencies in accordance with the specication for
Korea
0
selects frequencies for Europe (B/G and D/K standard)
4
FILTBW1
selects lter bandwidth (see Table 23)
3
CH2MOD1
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 lters than the FM mode
2
CH2MOD0
1
FILTBW0
selects the lter bandwidth (see Table 23)
0 (LSB)
CH1MODE
1
selects the hardware for the rst sound carrier to operate in AM mode
0
FM mode is assumed; this applies to both terrestrial and satellite FM reception
B7
B6
IDENT MODE
0
slow
0
1
medium
1
0
fast
1
off/reset
B4
B1
FILTER
BANDWIDTH
FILTER MODES
CH1
CH2
0
narrow
recommended for nominal terrestrial broadcast conditions and
SAT with 2 carriers
0
1
extra wide
narrow
recommended only for high-deviation SAT mono carriers
(e.g. obsolete Main channel on Astra)
1
0
medium
recommended for moderately overmodulated broadcast conditions
1
wide
recommended for strongly overmodulated broadcast conditions
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相關(guān)代理商/技術(shù)參數(shù) |
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| TDA9880 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Alignment-free multistandard vision and FM sound IF-PLL demodulator |
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