MF606G Ver la hoja de datos (PDF) - YCL Electronics

Número de pieza

componentes Descripción

Fabricante

MF606G

Asymmetric Digital Subscriber Line

YCL Electronics  

Product Specification

MF606G

4.5.2. Return loss:

Return loss measures the amount of lost energy 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 is a

function of the impedance of the circuit involved and is therefore frequency

dependent.These impedance must be closely maintained in order to reduce the

possibility of undesirable reflection and echoes which occur in long distance circuit

for the telephone user and destroy the data being sent. To perform the return loss

test ,open ,short, load calibration must be done prior measurement while the LCZ

impedance analyzer being selected in impedance mode. Return loss is general

expressed in decibels. General return loss equation is shown:

Return loss = 20 log ZL + ZM / ZL - ZMdB Where ZL = the reference impedance

ZM = the measured impedance

Data sheet subject to change without notice

RDPS-MF063(R1)01/15/2003

SHEET 9 OF 11

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