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公开(公告)号：KR1020060016781A
公开(公告)日：2006-02-22
申请号：KR1020057021509
申请日：2004-03-04
Applicant: 텔레폰악티에볼라겟엘엠에릭슨(펍)
Abstract: The invention refers to single-ended test of a loop (2, 3) with the aid of a transceiver (1), wherein an input impedance (Zin(f)) of the loop is generated. The transceiver (1) has a digital part (41), a codec (42) and an analog part (43) and is connected to the loop. With the aid of a transmitted and a reflected braodband signal (vin, vout) an echo transfer function Hecho(f) = V(f)out/Vin (f) is generated, which also can be expressed as formula (I). Here Zho(f), Zhyb(f) and Hepsilon(f) are model values for the transceiver (1). IN a calibration process a test transceiver, with the same type of hardware as the transceiver (1), is connected to known impedances, replacing the loop (2, 3). Hecho(f) = V( f)out/Vin(f) is generated for the known impedances and th emodel values are generanted and are stored in a memory (11) in the transceiver (1). The stored model values are then used when the input impedance (Zin(f)) for the loop (2, 3) is generated after a measurement of the broadband signal (V in, Vout) is performed.
Abstract translation: 本发明涉及借助于收发器（1）的环路（2,3）的单端测试，其中产生环路的输入阻抗（Zin（f））。 收发器（1）具有数字部分（41），编解码器（42）和模拟部分（43），并且连接到环路。 通过发送和反射的信号带信号（vin，vout）的帮助，生成回波传递函数Hecho（f）= V（f）out / Vin（f），其也可以表示为公式（I）。 这里Zho（f），Zhyb（f）和Hepsilon（f）是收发器（1）的模型值。 在校准过程中，具有与收发器（1）相同类型的硬件的测试收发器连接到已知阻抗，代替环路（2,3）。 对于已知阻抗产生Hecho（f）= V（f）out / Vin（f），并且生成第三模型值并存储在收发器（1）中的存储器（11）中。 然后当在执行宽带信号（V in，Vout）的测量之后产生用于环路（2,3）的输入阻抗（Zin（f））时，存储所存储的模型值。
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公开(公告)号：KR1020060012602A
公开(公告)日：2006-02-08
申请号：KR1020057021512
申请日：2004-04-08
Applicant: 텔레폰악티에볼라겟엘엠에릭슨(펍)
Inventor： 로젠베르그조나스
Abstract: The invention refers to single-ended test of a loop (2, 3). A test device (TD1) is connected to a remote device (3) via a line (2). The remote device is powered on and transmits intermittently handshake signals (HS1), which can disturb the loop test. A receiving and calculating unit (RE1) detects the handshake signals (HS1) and orders a sending unit (SD1) to send a halting signal (NAK-EF) to the remote device. The latter is halted for predetermined silent period of time, during which the test or a part of it is performed. If required the halting of the handshake signals is repeated. The test device sends a broadband loop test signal (S1) and receives a reflected signal (S2) during the silent period. A frequency dependent echo transfer function is generated from the signals (S1, S2) and is used for generating desired properties of the line (2) such as its length (L).
Abstract translation: 本发明涉及环路的单端测试（2,3）。 测试设备（TD1）经由线路（2）连接到远程设备（3）。 远程设备通电并间歇性发送握手信号（HS1），这可能会干扰环路测试。 接收和计算单元（RE1）检测握手信号（HS1），并命令发送单元（SD1）向远程设备发送停止信号（NAK-EF）。 后者在预定的静止时间段停止，在此期间执行测试或其一部分。 如果需要，重复握手信号的停止。 测试设备在静默期间发送宽带环路测试信号（S1）并接收反射信号（S2）。 从信号（S1，S2）产生与频率相关的回波传递函数，并且用于产生线（2）的期望特性，例如其长度（L）。
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公开(公告)号：KR101063653B1
公开(公告)日：2011-09-07
申请号：KR1020057021512
申请日：2004-04-08
Applicant: 텔레폰악티에볼라겟엘엠에릭슨(펍)
Inventor： 로젠베르그조나스
Abstract: The length and attenuation of a signal line between a transmitter and a customer premises equipment is to be estimated. A frequency dependent line input impedance (Z in (f)) as seen from the transmitter, is measured and an absolute impedance value (oe Z in (f) oe), is generated. The latter is shown as a curve (A1) in the diagram with the frequency (f) on the abscissa and the impedance (oe Z in (f) oe) on the ordinate. Extreme values (Max. 1 , Max 2 , Max 3 ; Min 1 , Min 2 , Min 3 ) arc denoted and a frequency distance (FD 1 -FD 4 ) between two consecutive of the extreme values is generated. The line length (L) is generated as L=½.vop/FD 1 , in which vop is the velocity of propagation of a signal on the line. The attenuation is estimated by multiplying the line length with an average attenuation value for the actual line type. The advantages are that the line length can be estimated with good accuracy in a simple manner for short lines and that the line attenuation is estimated in a simple manner.
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公开(公告)号：KR101018972B1
公开(公告)日：2011-03-02
申请号：KR1020057021509
申请日：2004-03-04
Applicant: 텔레폰악티에볼라겟엘엠에릭슨(펍)
Abstract: 본 발명은 송수신기(1)의 도움으로 루프(2, 3)의 싱글-엔디드 테스트에 관한 것이며, 여기서 루프의 입력 임피던스(Z
in (f))가 발생된다. 송수신기(1)는 디지털부(41), 코덱(42) 및 아날로그부(43)를 가지며, 루프에 접속된다. 송신되고 반사된 광대역 신호(vin, vout)의 도움으로, 에코 전달 함수(H
echo (f)=V
out (f)/V
in (f))가 발생되며, 이것은 또한 식(I)으로서 표현될 수 있다. 여기서, Z
ho (f), Z
hyb (f) 및 H
ε (f)는 송수신기(1)에 대한 모델 값이다. 교정 프로세스에서, 송수신기(1)와 동일한 형태의 하드웨어를 갖는 테스트 송수신기는 루프(2, 3)를 대체하는 공지된 임피던스에 접속된다. Hecho(f)=V
out (f)/V
in (f)는 공지된 임피던스에 대하여 발생되고, 모델 값이 발생되어 송수신기(1) 내의 메모리(11)에 저장된다. 그리고 나서, 저장된 모델 값은 루프(2, 3)에 대한 입력 임피던스(Z
in (f))가 광대역 신호(V
in , V
out )의 측정이 수행된 이후에 발생된다.
싱글 엔디드 테스트, 송수신기, 에코 전달 함수, 루프, 임피던스
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