1200/2400/4800bps MSK Modem
3
MX469
1. Block Diagram
TX GENERATOR
TX DATA I/P
TX FILTER
TX SIGNAL O/P
TX ENABLE
CLOCK RATE
XTAL/CLOCK
TX SYNC O/P
VDD
VBIAS
CLOCK
OSCILLATOR
DIVIDER
f.. n
XTAL
VSS
1200/2400 BPS SELECT
4800 BPS SELECT
BANDPASS O/P
RETRIGGERABLE
MONOSTABLE
DATA
FILTER
RX FILTER
LIMITER
LIMITER
RX ENABLE
UNCLOCKED
DATA O/P
RX SIGNAL I/P
DIGITAL
FILTER
RECTIFIER
RECTIFIER
CLOCKED
DATA O/P
DIGITAL
PLL
DATA
LATCH
RX SYNC O/P
NOISE FILTER
CARRIER DETECT O/P
S/N
COMPARATOR
CARRIER DETECT TIME CONSTANT
Figure 1: Block Diagram
ꢀ1998 MX-COM, Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054
Doc. # 20480081.010
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