CPF100F View Datasheet(PDF) - YCL Electronics
Part Name
Description
MFG CO.
'CPF100F' PDF : 9 Pages View PDF
CPF100F
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 150Vrms at any frequency from15.3Hz to 68Hz 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 to 5 Megohms.
The ground point shall be local building or green wire ground. As an objective , the dc resistance
should exceed 10MΩ.
4.5 : Test method
4.5.1 : 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 of a device inserted in a given transmission system mainly caused by
internal component resistive loss while all of the impedance between source , load and device
interface having been matched. To perform the insertion loss measurement ,thru calibration must
be done prior the testing .
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. :
YCL
Function
ZL
Generator
POTS
ZL
Splitter
HP-r
Page 5
RDPS-POTS044(R3)
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