TDA9870A datasheet(4/88 Pages) PHILIPS

No. de pieza	TDA9870A

Descripción Electrónicos	Digital TV Sound Processor DTVSP

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Fabricante Electrónico	PHILIPS [NXP Semiconductors]

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4 / 88 page

1998 Aug 10

4

Philips Semiconductors

Product speciﬁcation

Digital TV Sound Processor (DTVSP)

TDA9870A

2.1.1

ANALOG 2-CARRIER SYSTEMS

Table 1

Frequency modulation

Table 2

Identiﬁcation for A2 systems

STANDARD

SOUND

SYSTEM

CARRIER

FREQUENCY

(MHz)

FM DEVIATION (kHz)

MODULATION

BANDWIDTH/

DE-EMPHASIS

(kHz/

µs)

NOM.

MAX.

OVER

SC1

SC2

M

mono

4.5

15

25

50

mono

−

15/75

M

A2+

4.5/4.724

15

25

50

1

⁄2(L + R) 1⁄2(L − R)

15/75 (Korea)

B/G

A2

5.5/5.742

27

50

80

1

⁄2(L + R)

R

15/50

I

mono

6.0

27

50

80

mono

−

15/50

D/K

A2

6.5/6.742

27

50

80

1

⁄2(L + R)

R

15/50

D/K

A2*

6.5/6.258

27

50

80

1

⁄2(L + R)

R

15/50

PARAMETER

A2/A2*

A2+ (KOREA)

Pilot frequency

54.6875 kHz = 3.5

× line frequency

55.0699 kHz = 3.5

× line frequency

Stereo identiﬁcation

frequency

Dual identiﬁcation frequency

AM modulation depth

50%

117.5 Hz

line frequency

133

---------------------------------------

=

149.9 Hz

line frequency

105

---------------------------------------

=

274.1 Hz

line frequency

57

---------------------------------------

=

276.0 Hz

line frequency

57

---------------------------------------

=

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