参数资料
型号: XRT73LC00AIV-F
厂商: Exar Corporation
文件页数: 29/61页
文件大小: 0K
描述: IC LIU STS1/DS3/E3 SGL 44TQFP
标准包装: 160
类型: 线路接口装置(LIU)
驱动器/接收器数: 1/1
规程: DS3,E3,STS-1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 44-LQFP
供应商设备封装: 44-TQFP(10x10)
包装: 托盘
XRT73LC00A
32
REV. 1.0.2
E3/DS3/STS-1 LINE INTERFACE UNIT
3.0
THE RECEIVE SECTION
Figure 1 indicates that the XRT73LC00A Receive Section consists of the following blocks:
AGC/Equalizer
Peak Detector
Slicer
Clock Recovery PLL
Data Recovery
HDB3/B3ZS Decoder
The purpose of the XRT73LC00A Receive Section is to take an incoming attenuated/distorted bipolar signal
from the line and encode it back into the TTL/CMOS format where it can be received and processed by digital
circuitry in the Terminal Equipment.
3.1
Interfacing the Receive Section of the XRT73LC00A to the Line
By design, the Receive Section of the XRT73LC00A can be transformer-coupled or capacitive-coupled to the
line.
The specification documents for E3, DS3 and STS-1 all specify 75Ohm termination loads when
transmitting over coaxial cable. It is recommended to interface the Receive Section of the XRT73LC00A to the
line as shown in Figure 17 or Figure 18.
FIGURE 17. RECOMMENDED SCHEMATIC FOR INTERFACING THE RECEIVE SECTION OF THE XRT73LC00A TO THE
LINE (TRANSFORMER-COUPLING)
BNC
1:1
R1
37.4
R2
37.4
RTIP
RRING
C1
0.01uf
RPOS
RNEG
RCLK1
RLOS
RLOL
RxLOS
RxLOL
RxPOS
RxNEG
RxLineClk
T2
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