1200/2400/4800bps MSK Modem
11
MX469
5.2 Bit Error Rate
VDD
VDD
MILLI-
MILLI-
AMMETER
AMMETER
CLOCKED
DATA OUT
TX
DATA
I/P
TX
SIGNAL
O/P
RX
SIGNAL
IN
S3 TELEPHONE
CHANNEL
SIMULATOR
(with attenuator
&
5kHz BW noise gen)
RX
SYNC
PREAMBLE
&
MX469
MX469
BUFFER
(INTERFACE)
CIRCUIT
ERROR
PSEUDO-RANDOM
DATA
RECEIVER
TRANSMITTER
DETECTOR
(components
as Fig. 2)
(components
as Fig. 2)
GENERATOR
Tx SYNC
CARRIER
DETECT
TRUE RMS
VOLTMETER
TRUE RMS
VOLTMETER
CARRIER
DETECT
OUT
OSCILLOSCOPE
OUT HIGH
DETECTOR
Figure 10: MX469 Test Set-Up
Figure 11: Typical Variation of Bit Error Rate with Input Level
ꢀ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
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
