參數(shù)資料
型號(hào)： DS3251
英文描述： Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
中文描述： 單/雙/三/四路、DS3/E3/STS-1 LIU
文件頁數(shù)： 29/71頁
文件大?。?/td> 925K
代理商： DS3251
DS3251/DS3252/DS3253/DS3254
29 of 71
Table 9-A. DS3 Waveform Template
TIME (IN UNIT INTERVALS)
NORMALIZED AMPLITUDE EQUATION
UPPER CURVE
-0.85 T -0.68
-0.68 T +0.36
0.36 T 1.4
0.03
0.5 {1 + sin[( / 2)(1 + T / 0.34)]} + 0.03
0.08 + 0.407e
-1.84(T - 0.36)
LOWER CURVE
-0.85 T -0.36
-0.36 T +0.36
0.36 T 1.4
-0.03
0.5 {1 + sin[( / 2)(1 + T / 0.18)]} - 0.03
-0.03
Governing Specifications: ANSI T1.102 and Bellcore GR-499.
Table 9-B. DS3 Waveform Test Parameters and Limits
PARAMETER
Rate
Line Code
Transmission Medium
Test Measurement Point
Test Termination
Pulse Amplitude
SPECIFICATION
44.736Mbps ( 20ppm)
B3ZS
Coaxial cable (AT&T 734A or equivalent)
At the end of 0 to 450ft of coaxial cable
75 ( 1%) resistive
Between 0.36V and 0.85V
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curves listed in
Table 9-A
.
Between -1.8dBm and +5.7dBm
At least 20dB less than the power measured at
22.368MHz
Ratio of positive and negative pulses must be
between 0.90 and 1.10.
Pulse Shape
Unframed All-Ones Power Level at 22.368MHz
Unframed All-Ones Power Level at 44.736MHz
Pulse Imbalance of Isolated Pulses
Table 9-C. STS-1 Waveform Template
TIME (IN UNIT INTERVALS)
NORMALIZED AMPLITUDE EQUATIONS
UPPER CURVE
-0.85 T -0.68
-0.68 T +0.26
0.26 T 1.4
0.03
0.5 {1 + sin[( / 2)(1 + T / 0.34)]} + 0.03
0.1 + 0.61e
-2.4(T - 0.26)
LOWER CURVE
-0.85 T -0.36
-0.36 T +0.36
0.36 T 1.4
-0.03
0.5 {1 + sin[( / 2)(1 + T / 0.18)]} - 0.03
-0.03
Governing Specifications: Bellcore GR-253 and Bellcore GR-499 and ANSI T1.102.
Table 9-D. STS-1 Waveform Test Parameters and Limits
PARAMETER
Rate
Line Code
Transmission Medium
Test Measurement Point
Test Termination
Pulse Amplitude
SPECIFICATION
51.840Mbps ( 20ppm)
B3ZS
Coaxial cable (AT&T 734A or equivalent)
At the end of 0 to 450ft of coaxial cable
75 ( 1%) resistive
0.800V nominal (not covered in specs)
An isolated pulse (preceded by two zeros and
followed by one or more zeros) falls within the
curved listed in
Table 9-C
.
Between -1.8dBm and +5.7dBm
At least 20dB less than the power measured at
25.92MHz.
Pulse Shape
Unframed All-Ones Power Level at 25.92MHz
Unframed All-Ones Power Level at 51.84MHz
相關(guān)PDF資料
PDF描述
DS3251N Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
DS3252 Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
DS3252N Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
DS3253 Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
DS3253N Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS3251+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC Single DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS32512 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 12-Port DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS32512+ 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 12-Port DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS32512A2 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 12-Port DS3/E3/STS-1 Line Interface Unit RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
DS32512DK 功能描述:網(wǎng)絡(luò)開發(fā)工具 DS32512 Dev Kit RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V
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