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MF614A

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Product Specification

MF614A

4.4. DC characteristics:

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

from 0 mA to 100 mA. This In-Line filter can pass POTS tip-to-ring DC voltages of 0 V to

105 V and ringing signals of 40 Vrms to 150 Vrms at any frequencies from 15.3 Hz to 68 Hz

with a DC component in the range from 0 V to 105 V. 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 filter. The DC resistance from tip-to-ground and from ring-to-ground at the

Phone interface with the Line interface open shall be greater than or equal to 10 Megohms.

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

resistance should exceed 10 MΩ.

4.5. Test methods:

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 setup in figure 1. For measuring POTS band

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

General Insertion loss equation can be expressed as follows.

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 definition:

1.0 nF

5 Mohms

Figure 1.

Data sheet subject to change without notice

RDPS-MF041(R0)03/21/2002

SHEET 9 OF 14

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