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BCT-1510 BCT-1520 BCT-1530

BCT-1510 BCT-1520 BCT-1530

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73K324BL-IH (MAIN ASSY(6/7) : IC6005)<br />

• Modem IC<br />

•Block Diagram<br />

DTMF,<br />

ANSWER,<br />

GUARD &<br />

CALLING<br />

TONE<br />

GENERATOR<br />

27<br />

FSK<br />

MODULATOR<br />

FILTER<br />

BUFFER<br />

EQUALIZER FILTER<br />

QAM/<br />

DPSK<br />

MODULATOR<br />

FIR<br />

PULSE<br />

SHAPER<br />

DI-BIT/<br />

QUAD-BIT<br />

ENCODER<br />

SCRAMBLER<br />

ATTENUATOR<br />

18 TXA1<br />

17 TXA2<br />

2W/4W<br />

HYBRID<br />

8-BIT<br />

µP<br />

BUS<br />

INTERFACE<br />

32<br />

RXA<br />

FILTER<br />

DIGITAL<br />

SIGNAL<br />

PROCESSOR<br />

RECEIVE<br />

FUNCTIONS<br />

DI-BIT/<br />

QUAD-BIT<br />

DECODER<br />

DEBUFFER DESCRAMBLER<br />

ANTI-ALIAS<br />

FILTER<br />

PASS<br />

BAND<br />

FILTER<br />

A/D<br />

EQUALIZER<br />

TS5, <strong>BCT</strong>-<strong>1510</strong>, <strong>BCT</strong>-<strong>1520</strong>,<br />

<strong>BCT</strong>-<strong>1530</strong><br />

GAIN<br />

BOOST<br />

AGC<br />

FIXED<br />

DEMODULATOR<br />

SERIAL<br />

INTERFACE<br />

TXD 24<br />

RXD 25<br />

TONE<br />

DETECTION<br />

53

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