參數(shù)資料
型號(hào)： XRT5997
廠商： Exar Corporation
英文描述： Seven-Channel E1 Line Interface Unit(7通道 E1線接口單元)
中文描述： 七通道E1線路接口單元（7通道素E1線接口單元）
文件頁(yè)數(shù)： 27/37頁(yè)
文件大?。?/td> 367K
代理商： XRT5997
XRT5997
27
Rev. 1.0.0
Capacitive-Coupling the Receiver to the Line
Figure 9, presents a recommended approach that the
user to employ when capacitive-coupling the Receive
Section to the line.
U1
XRT5997
RTIP_1
7
RRing_1
8
RxPOS_1
1
RxNEG_1
2
RxLOS_1
100
C1
0.1uF
1
2
C2
0.1uF
1
2
R2
37.4
1
2
R1
37.4
1
2
J1
BNC
1
2
RxPOS_1
RxNEG_1
Loss of Signal - 1
Figure 9. Recommended Schematic for Interfacing the Receive Sections of the XRT5997 Device to
the Line for 75
Applications (Capacitive-Coupling)
2.2 The “Receive Equalizer” Bock
After a given Channel (within the XRT5997 device) has
received the incoming line signal, via the RTIP_x and
RRing_x input pins, the first block that this signal will
pass through is the Receive Equalizer block.
As the line signal is transmitted from a given “Transmit-
ting” terminal, the pulse shapes (at that location) are
basically “square”. Hence, these pulses consist of a
combination of “l(fā)ow” and “high” frequency Fourier
components. As this line signal travels from the
“transmitting terminal” (via the coaxial cable or twisted
pair) to the receiving terminal, it will be subjected to
“frequency-dependent” loss. In other words, the higher
frequency components of the signal will be subjected
to a greater amount of attenuation than the lower
frequency components. If this line signal travels over
reasonably long cable lengths, then the shape of the
pulses (which were originally square) will be distorted
and with inter-symbol interference increases.
The purpose of this block is to equalize the incoming
distorted signal, due to cable loss. In essence, the
Receive Equalizer block accomplishes this by subject-
ing the received line signal to “frequency-dependent”
amplification (which attempts to counter the fre-
quency-dependent loss that the line signal has experi-
enced). By doing this, the Receive Equalizer is
attempting to restore the shape of the line signal so that
the received data can be recovered reliably.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT5997ES 功能描述:其他開(kāi)發(fā)工具 Eval Board for XRT5997 Series RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評(píng)估:ELEV-8 Quadcopter 工作電源電壓:
XRT5997IV 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver
XRT5997IV-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 3.3V or 5V 7-ch E1 temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT5997IVTR-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 7 Ch. E1 LIU RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT59L81IG-F 功能描述:時(shí)鐘發(fā)生器及支持產(chǎn)品 BITS Clock Generator RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數(shù)量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-56
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