CMX269A データシートの表示（PDF） - MX-COM Inc
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CMX269A Datasheet PDF : 18 Pages
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5.2 Test Set Up
VDD
9
CMX469A PRELIMINARY INFORMATION
VDD
MILLI-
AMMETER
PREAMBLE &
PSEUDO-RANDOM
DATA
GENERATOR
TX
DATA
I/P
CMX469A
TRANSMITTER
(components
as Fig. 2)
TX
SIGNAL
O/P
BUFFER
(INTERFACE)
CIRCUIT
Tx SYNC
OSCILLOSCOPE
TRUE RMS
VOLTMETER
TELEPHONE
CHANNEL
SIMULATOR
(with attenuator and
5kHz/8kHz BW
noise generator)
RX
SIGNAL
IN
MILLI-
AMMETER
CLOCKED
DATA OUT
CMX469A
RECEIVER
(components
as Fig. 2)
RX
SYNC
ERROR
DETECTOR
TRUE RMS
VOLTMETER
CARRIER
DETECT
OUT
CARRIER
DETECT
OUT HIGH
DETECTOR
Figure 5: CMX469A Test Set-Up
5.3 Bit Error Rate
1 x 10 -1
* BIT RATE BANDWIDTH
1 x 10 -2
1 x 10 -3
10dB
12dB SNR*
SNR*
1 x 10 -4
1 x 10 -5
50
100
150
200 250 300
500 700 800
INPUT SIGNAL LEVEL (mVRMS)
Figure 6: Typical Variation of Bit Error Rate with Input Level
©1999 MX-COM, Inc.
www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054
Doc. # 20480191.002
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
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