CPF127F Ver la hoja de datos (PDF) - YCL Electronics

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componentes Descripción

Fabricante

CPF127F

Asymmetric Digital Subscriber Line

YCL Electronics  

Product Specification

CPF127F

4.2.3. DC characteristic :

All requirement of this specification can be met in the presence of all POTS loop

currents from 0mA to 80mA. This POTS splitter can pass POTS tip-to-ring dc voltages

of 0V to 72V and ringing signals of 40V to 80Vrms at any frequency from22Hz to 28Hz

with a dc component in the range from 0V to 72V. The dc resistance from tip-to-ring at

the line port interface with the phone interface shorted, shall be less than or equal to

12.5 ohms. The DC resistance from tip-to-ground and from ring-to-ground at the POTS

interface with the U-R interface open shall be greater than or equal to 5 Megohms. The

ground point shall be local building or green wire ground. As an objective , the dc

resistance should exceed 10MΩ.

4.3. Test Methodology :

4.3.1. Insertion and Return loss Test For ISDN Function.

4.3.1.1. Test Equipment :

a . HP4395A Network / Spectrum / Impedance Analyzer

b . HP87512A Transmission / Reflection test set

c . Balun North Hills : 0303LB( 50Ω : 150Ω )

4.3.1.2. Test Setup: is shown in Fig.1 .

4.3.1.3. Test Procedure :

a . Set HP4395A in B/R mode for attenuation test while in A/R mode for Return loss

test.

b . Connecting the Analyzer to the ISDN and line side of splitter through the North

Hills Balun 0303LB

c . Set frequency of interest given in specification.

d . Calibrating the HP4395A network Analyzer via the thru for attenuation test while

open, load calibration being performed for Return loss.

e . Measurement attenuation and Return loss.

Fig.1. Test Setup

Data sheet subject to change without notice

20.89nF

82uH

100ohm

Fig. 1-a ZADSL-I does not include the

blocking capacitors CB .

RDPS-POTS485(R0)03/28/2003

SHEET 7 OF 10

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