MF600SWI Ver la hoja de datos (PDF) - YCL Electronics

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componentes Descripción

Fabricante

MF600SWI

Mirco Filter For ADSL CPE Side

YCL Electronics  

Product Specification

MF600SWI

5.5.2. Return loss:

Return loss measure the amount of energy that is lost due to reflection which resulted

from impedance mismatching at the interface. Return loss is essentially defined as the

ratio of the power incident upon a given transmission system to the power reflected

caused by impedance mismatch with respect to reference impedance at the interface

between source and device. Return loss figure are a function of the impedance of the

circuit involved and are therefore frequency dependent. These impedance must be

closely maintained in order to reduce the possibility of undesirable reflection and echoes

which in long distance circuit the telephone user or destroy the data being sent. To

perform the return loss test, open, short, load calibration must be done prior

measurement while the LCR impedance analyzer being selected in impedance mode.

Return loss is general expressed in decibels. General return loss equation is as follows.

Return loss = 20 log ZL + ZM / ZL - ZMdB

Where ZL = the reference impedance

ZM = the measured impedance

The test setup is shown in drawing below.

5.5.2.1. Complex* return loss with ATU-R :

ZNL-r definition:

5.5.2.2. 600 ohm return loss with ATU-R :

Figure 3.

Data sheet subject to change without notice

Figure 4.

RDPS-MF051(R1)10/01/2002

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