Product Specification

MF609A

Data sheet subject to change without notice

RDPS-MF038(R0)01/23/2002

SHEET 7 OF 12

4.4. DC characteristic :

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

from 0mA to 100mA. This in line filter can pass POTS tip-to-ring dc voltages of 0V to 105V

and ringing signals of 40V to 106Vrms at any frequency from17Hz to 23Hz with a dc

component in the range from 0V to 105V. The dc resistance from tip-to-ring at the line port

interface with the phone interface shorted, shall be less than or equal to 25 ohms for one

splitter. 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 to5 Megohms. The

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

should exceed 10M

Ω.

4.5. Test method :

4.5.1. On hook insertion loss :

The insertion loss of a device connected into a given transmission system is defined as the

ratio, expressed in dB, of the load power available(before and after insertion ) delivered to

the output network beyond the point of insertion at a given frequency. In general , the

insertion loss is defined as the ratio, expressed in dB of the power delivered to a load with

the circuit in place and the power delivered to a load without the circuit in place. The added

insertion loss shall be measured using the test up in figure 3. For measuring POTS band

insertion loss for single filter module also a single filter wit four added parallel load filters.

General Insertion loss equation can be expressed as following. Insertion loss = 20 log

V2 / V1 dB where

V1 = the measured voltage value of load without LPF in circuit.

V2 = the measured voltage value of load with LPF in circuit.

The test setup is shown in drawing below. :

Zon defined:

1.0nf

5M ohm