TDA9874H datasheet(4/56 Pages) PHILIPS

4 / 56 page

1998 Apr 27

Philips Semiconductors

Preliminary speciﬁcation

Digital TV sound demodulator/decoder

TDA9874H

2.1.1

ANALOG 2-CARRIER SYSTEMS

Table 1

Frequency modulation

Table 2

Identiﬁcation for A2 systems

2.1.2

2-CARRIER SYSTEMS WITH NICAM

Table 3

NICAM

Note

1. See

“EBU specification” or equivalent specification.

STANDARD

SOUND

SYSTEM

CARRIER

FREQUENCY

(MHz)

FM DEVIATION (kHz)

MODULATION

BANDWIDTH/

DE-EMPHASIS

(kHz/

µs)

NOM.

MAX.

OVER.

SC1

SC2

mono

4.5

mono

−

15/75

A2+

4.5/4.724

⁄2(L + R)

⁄2(L − R)

15/75 (Korea)

B/G

5.5/5.742

⁄2(L + R)

15/50

mono

6.0

mono

−

15/50

D/K

6.5/6.742

⁄2(L + R)

15/50

D/K

A2*

6.5/6.258

⁄2(L + 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%

STANDARD

SC1

SC2

(MHz)

NICAM

DE-EMPHASIS

ROLL-OFF

(%)

NICAM

CODING

FREQUENCY

(MHz)

TYPE

MODULATION

INDEX (%)

DEVIATION

(kHz)

NOM. MAX. NOM. MAX.

B/G

5.5

−−

5.85

J17

note 1

6.0

−−

6.552

J17

100

note 1

D/K

6.5

−−

5.85

J17

tbf

6.5

100

−−

5.85

J17

note 1

117.5 Hz

line frequency

133

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

149.9 Hz

line frequency

105

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

274.1 Hz

line frequency

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

276.0 Hz

line frequency

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

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