CPF104V 데이터 시트보기 (PDF) - YCL Electronics

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CPF104V

POTS/ISDN Splitter

YCL Electronics  

Product Specification

CPF104V

4.3.2. Return loss for POTS :

4.3.2.1. Description :

Return loss is essentially defined as the ratio of the power incident upon a given

transmission system to the power reflected caused by an impedance mismatch with

respect to reference impedance at the interface between source and device.Return loss

is generally expressed in decibels. General Return Loss equation as below:

Return loss = 20 log  ZR + Z M / ZR - Z M  dB

ZR = the reference impedance

ZM = the measured impedance

4.3.2.2. Apparatus :

a . HP 4192A Analyzer or equivalent

b . Complex load ZL = Zcomplex(1) or Zcomplex(2) or Zcomplex(3) or 600ohms

c . Test fixture : HP16047A test fixture

4.3.2.3. Test procedure :

a . Set the measurement Frequency of interest

b . Calibrating the HP4192A L.C.Z. impedance Analyzer via the short . open, load

c . Connecting the Analyzer to the POTS side of splitter with the complex load

across the Line side.

d . Measure the impedance value R + jX and calculate the Return loss expressed in

decibel from the equation Return loss = 20 log ZR + Z M / ZR – Z M  dB

e . Change another frequency of interest, then repeat step a~e.

4.3.2.4. Return loss test for one splitter :

Data sheet subject to change without notice

RDPS-POTS364(R2)12/12/2002

SHEET 7 OF 11

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