CPF105G View Datasheet(PDF) - YCL Electronics

Part Name

Description

Manufacturer

CPF105G

Asymmetric Digital Subscriber Line

YCL Electronics  

Product Specification

CPF105G

4.5.2. 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 LCZ

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

expressed in decibels. General Return loss equation as below:

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-POTS281(R1)04/30/2002

SHEET 9 OF 11

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