參數(shù)資料
型號(hào): CMX469AP6
英文描述: MODEM
中文描述: 調(diào)制解調(diào)器
文件頁(yè)數(shù): 13/16頁(yè)
文件大?。?/td> 475K
代理商: CMX469AP6
1200/2400/4800 Baud FFSK/MSK Modem
CMX469A
2001 Consumer Microcircuits Limited
14
D/469A/2
1.7.1
Electrical Performance
(continued)
Interface Timings
Notes
Min.
Typ.
Max.
Units
t
ESET
Tx Delay, Signal to Disable Time
2
2.0
-
800
μs
t
DSET
Data Set-Up Time
1
2.0
-
-
μs
t
DH
Data Hold Time
2.0
-
-
μs
t
TXD
Tx Delay to O/P Time
-
1.2
-
μs
t
TDR
Tx Data Rate Period
2
-
833
-
μs
t
RDR
Rx Data Rate Period
2
800
-
865
μs
Undetermined State (see Figure 5)
-
-
2.0
μs
t
ID
Internal Rx Delay
-
1.5
-
ms
Notes:
1. Consider the Xtal/Clock tolerance.
2. 1200 Baud example.
150
200
300
500
700
800
INPUT
SIGNAL
LEVEL
(mVrms)
B
I
E
R
R
1
R
A
250
100
50
1
x
10
-5
1
x
10
-4
x
10
-3
1
x
10
-2
1
x
10
-1
10dB
SNR
*
12dB
SN
R
*
2
0
B
S
N
R
*
*
BIT
RATE
BANDWIDTH
Figure 6 Typical Variation of Bit Error Rate with Input Level
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