SAA7284ZP データシートの表示（PDF） - Philips Electronics

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SAA7284ZP

Terrestrial digital sound decoder for conventional intercarrier PLL-IF systems

Philips Electronics 

Philips Semiconductors

Terrestrial digital sound decoder for

conventional intercarrier PLL-IF systems

Preliminary specification

SAA7284

SYSTEM PERFORMANCE

Bit Error Rate (BER)

Table 17 shows input signal conditions which typically produce bit error rates of less than 10−3. Signal levels given in dB

are related to the picture carrier reference level (0 dB) and based on the output level of the set up as shown in Fig.8.

All measurements are at RF and using Philips Semiconductors SAA7284 Applications Board.

Table 17 System performance

INPUT SIGNAL CONDITIONS(1)

Picture carrier RF level (FM deviation = ±50 kHz)

NICAM level with respect to picture carrier (FM deviation = ±50 kHz)

FM overmodulation

Notes

1. Measurements made with colour bar at 100% modulation.

a) FM level = −10 dB system I; −13 dB system BG.

b) NICAM level = −20 dB (unless otherwise specified).

2. 10 dB sound shelf with extended bandwidth for NICAM signal.

3. 14 dB sound shelf with extended bandwidth for NICAM signal.

SYSTEM I

SYSTEM BG

SAW A(2) SAW B(2) SAW C(3)

35

−35

>120

35

−34

>100

35

−32

>100

UNIT

dB

dB

kHz

Acquisition time

Maximum acquisition time = 1 s, measured from power-on to reset in-sync condition achieved.

1996 Oct 24

21

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