TDA9874H 데이터 시트보기 (PDF) - Philips Electronics

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TDA9874H

Digital TV sound demodulator/decoder

Philips Electronics 

Philips Semiconductors

Digital TV sound demodulator/decoder

Preliminary specification

TDA9874H

2.1.3 SATELLITE SYSTEMS

An important specification for satellite TV reception is the Astra specification. The TDA9874H is suited for the reception

of Astra and other satellite signals, with sound carrier frequencies from 4 to 9.2 MHz.

Table 4 FM satellite sound

CARRIER TYPE

CARRIER

FREQUENCY

(MHz)

Main

6.50(1)

Sub

7.02/7.20

Sub

7.38/7.56

Sub

7.74/7.92

Sub

8.10/8.28

MODULATION

INDEX

MAXIMUM

FM DEVIATION

(kHz)

0.26

85

0.15

50

0.15

50

0.15

50

0.15

50

MODULATION

BANDWIDTH/

DE-EMPHASIS

(kHz/µs)

mono

15/50(1)

m/st/d(2)

15/adaptive(3)

m/st/d(2)

15/adaptive(3)

m/st/d(2)

15/adaptive(3)

m/st/d(2)

15/adaptive(3)

Notes

1. For other satellite systems, frequencies of e.g. 5.80 MHz, 6.60 MHz or 6.65 MHz can also be received.

A de-emphasis of 60 µs or in accordance with J17 is available.

2. m/st/d = mono or stereo or dual language sound.

3. Adaptive de-emphasis = compatible to transmitter specification.

3 ORDERING INFORMATION

TYPE

NUMBER NAME

PACKAGE

DESCRIPTION

TDA9874H QFP44 plastic quad flat package; 44 leads (lead length 2.35 mm); body 14 × 14 × 2.2 mm

VERSION

SOT205-1

1998 Apr 27

5

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