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CX28333-1X 参数 Datasheet PDF下载

CX28333-1X图片预览
型号: CX28333-1X
PDF下载: 下载PDF文件 查看货源
内容描述: 单/双/三E3 / DS3 / STS - 1线路接口单元 [Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit]
分类和应用: 电信集成电路PC
文件页数/大小: 68 页 / 549 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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2.0 Functional Description  
CX28331/CX28332/CX28333  
2.2 Transmitter  
Single/Dual/Triple E3/DS3/STS-1 Line Interface Unit  
For DS3/STS-1 rates, a pulse-shaper block is used to shape the transmit  
waveform and reduce its high-frequency energy content. This ensures that the  
transmit pulse template is met at the cross-connect block, which follows 0450  
feet of transmit-side coaxial cable.  
2.2.3 Line Driver  
The differential line driver takes the filtered transmit waveform, increases it to the  
proper level, and drives it into the transmit magnetics. The two external discrete  
back-matching resistors (36 ) aid in line matching. The driver is presented with  
an approximately 150 differential load. Driver gain accounts for the 6 dB gain  
loss in the back-matching resistors.  
Figure 2-3 illustrates the Pulse/Power template measurement points for the  
various data rates.  
Figure 2-3. Pulse Measurement Points  
Pulse/Power Template for DS3/STS-1  
0450 ft COAX  
(type 734/728)  
0450 ft COAX  
(type 734/728)  
RX  
DSX  
TX  
Pulse/Power Template for E3  
0450 ft COAX  
(type 734/728)  
0450 ft COAX  
(type 734/728)  
DSX  
TX  
RX  
100604_013  
2-4  
Conexant  
100985A  
 
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