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DB929B bảng dữ liệu(PDF) 48 Page - CML Microcircuits

tên linh kiện DB929B
Giải thích chi tiết về linh kiện  Full Data Packet Framing
PDF  51 Pages
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nhà sản xuất  CMLMICRO [CML Microcircuits]
Trang chủ  http://www.cmlmicro.com
Logo CMLMICRO - CML Microcircuits

DB929B bảng dữ liệu(HTML) 48 Page - CML Microcircuits

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4-Level FSK Modem Data Pump
Page 48 of 50
MX929B PRELIMINARY INFORMATION
©2001 MX-COM, INC.
www.mxcom.com Tel: 800 638 5577 336 744 5050
Fax: 336 744 5054
Doc. # 20480171.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
6.1.5
Typical Bit Error Rate
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
8
9
10
11
12
13
14
15
16
S/N dB (Noise in 2 x Symbol RateBandwidth)
BER
BER with FEC
BER without FEC
Figure 29: Typical Bit Error Rate With and Without FEC
Measured under nominal working conditions, LEVRES bits set to 'Level Track' or 'Slow Peak Detect' and
PLLBW bits set to 'Medium' or 'Narrow' Bandwidth, Command Register TXIMP bit set to '0' or '1' (same for Tx
and Rx devices), with pseudo-random data.
Note:
¸¸¹
·
¨¨©
§
Voltage
Noise
Voltage
Signal
20log10
as
calculates
N
/
S
Where:
Signal Voltage is the measured VRMS of a random 4-level signal.
Noise Voltage is the VRMS of a flat Gaussian noise signal having a bandwidth from a few Hz to
twice the symbol rate (e.g. to 9600Hz when measuring a 4800 symbol/sec (9600bps) system).
Both signals are measured at the same point in the test circuit.



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