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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