Page 1
Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 1 OF 11
File No RDPS-POTS434
Revision R0
System Application
ISDN Filter for ADSL
Product Type ISDN / POTS
Product Name CPF104IG
Date Oct. 16, 2002
Bert Lin - Design Engineer, R&D_1Issued By
Roger Wu – Manager, R&D_1Approved By
Issued Date
YCL Electronics Co., Ltd.
No.95, Feng Jen Road. Feng Shan City, Kaohsiung, Taiwan, R.O.C.
This controlled document is the property of YCL Electronics Co., Ltd. Any duplication
reproduction or transmission by unauthorized parties without the prior written
permission of YCL Electronics Co., Ltd. is prohibited.
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 2 OF 11
Table of contents
Item Description Page
1 Introduction
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3
2 Reference
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3
3 Abbreviations
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3
4
Technical requirements
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4
4.1. Block diagram
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4
4.2. Electrical specification
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5
4.2.1. General requirement
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5
4.2.2. DC characteristic
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6
4.3. Test methodology
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7
4.3.1. Filter insertion loss and attenuation
and return loss test for ISDN port
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7
4.3.2. Filter insertion loss and attenuation
and return loss test for POTS port
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8
4.3.3.Filter Return Loss test for POTS port
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9
5 Environmental condition
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10
5.1. Resistibility to overvoltage and
overcurrents
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10
5.2. Climatic condition
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10
5.2.1. Operating temperature
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10
5.2.2. Storage and transport
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10
5.2.3. Operating humidity
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10
6 Reliability conditions
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10
6.1.Thermal shock
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10
6.2. Temperature humidity exposure
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10
6.3. Vibration test
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10
7 Mechanical design
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7.1. PCB dimension
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 3 OF 11
1. Introduction:
The CPF104IG is a splitter module that has been specifically designed to implement the
functionality of low pass filter in ISDN over ADSL application. The CPF104IG integrate low
pass filter that block the high frequency energy from reaching the ISDN device and provide
isolation from impedance effects of the ISDN device on ADSL. Because the ISDN splitter
connects directly to the subscriber loop media , it must also provide some protection for
externally induced line hits or faults which could damage any attached equipment or
endanger humans interacting with the installed equipment. The circuit protection will be
provided mostly by standard central office line protection means and additional protection
measures built into splitter to protect against line overstress which could damage the splitter
itself. This splitter mainly consist of one low pass filter which provide ISDN and POTS solution
respectively
2. Reference:
Ref. 1 : ETSI TS 101 388 Asymmetric Digital Subscriber Line European specific
requirements
Ref. 2 : ANSI T1.413 Network and customer installation interface.
Ref. 3 : ITU G.992.1 Annex B
Ref. 4 : ITU-T K.21 Resistibility of telecommunication switching equipment to
Overvoltages and overcurrents .
3. Abbreviations:
ADSL Asymmetric Digital Subscriber Line
ISDN Integrated Service Digital Network
CO Central Office
CPE Customer Premise Equipment.
POTS Plain Old Telephone Service
RT Remote Terminal
Z
ADSL
Network termination of ADSL
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 4 OF 11
4. Technical requirements:
4.1. Schematic :
A block diagram of this product is graphically illustrated as below.
CB
27nF x 2
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 5 OF 11
4.2. Electrical Specification :
4.2.1. General requirement :
Electrical requirements
Splitter parameter
Range values
ISDN band(3dB bandwidth) DC to 80KHz
Nominal impedance for ISDN 135 ohm
Nominal impedance for POTS 600 ohm
Current voice band
Loop current 100mA
DC resistance
DC resistance <=12.5 ohm
DC resistance tip to ground >5 M ohm
Low Pass Filter Passband requirements between ISDN port and Line port
1KHz to 40KHz <0.8 dB
Insertion loss
40KHz to 80KHz <2 dB
Low Pass Filter stopband requirements between ISDN port and Line port
Attenuation 150KHz to 1104KHz >65 dB
Return Loss requirements for Low Pass Filter on the ISDN port
4KHz to 40KHz >16 dB
Return loss
40KHz to 80KHz >14 dB
Low Pass Filter Passband requirements between POTS port and Line port
Insertion loss 200Hz to 3600Hz < 1dB
Return Loss requirements for Low Pass Filter on the POTS port
300Hz to 2KHz >14 dB
Return loss
2.1KHz to 3.4KHz >11 dB
High Pass Filter Passband Loss requirement between ADSL port and Line port
120KHz to 170KHz <3 dB (100ohm)
Insertion loss
170KHz to 1104KHz <1 dB (100ohm)
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 6 OF 11
Electrical requirements
Splitter parameter
Range values
Delay Distortion for Low Pass Filter between POTS / ISDN port and line port
200Hz to 600Hz < 250usec ( 600ohm)
600Hz to 3200Hz < 200usec ( 600ohm)
3200Hz to 4000Hz < 250usec ( 600ohm)
Delay Distortion
Up to 80KHz < 20usec ( 135ohm)
Unbalance about earth for Low Pass Filter on POTS/ISDN port and Line port
50Hz to 600Hz > 40dB ( 600ohm)
600Hz to 3400Hz > 46dB ( 600ohm)
3400Hz to 4000Hz > 40dB ( 600ohm)
Up to 30KHz > 40dB ( 135ohm)
30KHz to 1104KHz > 46dB ( 135ohm)
Longitudinal conversion loss(LCL)
1104KHz to 5MHz > 40dB ( 135ohm)
4.2.2. DC characteristic :
All requirement of this specification can be met in the presence of all ISDN loop currents
from 0mA to 100mA. This ISDN splitter can pass ISDN tip-to-ring dc voltages of 0V to 72V
and ringing signals of 40V to 80Vrms at any frequency from 22Hz 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 ISDN 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.
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 7 OF 11
4.3. Test methodology
4.3.1. Filter insertion loss and attenuation and return loss test for ISDN port :
4.3.1.1. Test equipment :
a : HP4395A Network / Spectrum / Impedance Analyzer
b : HP87512A Transmission / Reflection test set
c : Balun North Hills : 0303LB( 50Ω : 135Ω )
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 insertion loss and attenuation test while in A/R
mode for Return loss test.
b : Connecting the Analyzer to the ISDN and LINE sides of splitters 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, short, load calibration being performed for Return loss.
e : Measurement insertion loss and attenuation and Return loss.
Fig.1. Test Setup
Fig.1-a Z
ADSL
Load
20.89nF
100ohm82uH
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 8 OF 11
4.3.2. Filter insertion loss test for POTS port :
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. :
600ohm
600ohm
Z
ADSL
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Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 9 OF 11
4.3.3. Filter Return Loss test for POTS port :
Return loss measure the amount of energy that is lost due to reflection which resulted from
impedance mismatching at the interface. Return loss is essentially defined as the ratio of the
power incident upon a given transmission system to the power reflected caused by impedance
mismatch with respect to reference impedance at the interface between source and device.
Return loss figure are a function of the impedance of the circuit involved and are therefore
frequency dependent. These impedance must be closely maintained in order to reduce the
possibility of undesirable reflection and echoes which in long distance circuit the telephone user
or destroy the data being sent. To perform the return loss test ,open ,short, load calibration must
be done prior measurement while the LCZ impedance Analyzer being selected in impedance
mode. Return loss is general expressed in decibels.
General Return loss equation as below:
Return loss = 20 log Z
Load
+ ZM / Z
Load
- ZMdB
Where Z
Load
= the reference impedance ZM = the measured impedance
The test setup is shown in drawing below :
Z
ADSL
Page 10
Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 10 OF 11
5. Environmental condition:
5.1. Resistibility to overvoltages and overcurrents:
The splitter has to comply with requirements as per ITU-T K.21.
5.2. Climatic conditions:
5.2.1. Operating temperature:
Application indoor
Long time operation guarantee temperature ( 5 to 40 0C )
Short time operation guarantee temperature ( 0 to 50 0C )
( According to ETS 300 019, class 3.2 )
5.2.2. Storage and transport:
Low ambient temperature - 20 0C
High ambient temperature +85 0C
( According to MIL-STD-202 method 107 )
5.2.3. Operation humidity:
Long time operation guarantee humidity ( 5 to 85 % )
Short time operation guarantee humidity ( 5 to 90 % )
Short time : within 72 continuous hours and 15 days in a year
6. Reliability conditions:
6.1. Thermal shock :
Temperature from -20 °C to +85 °C for 5 cycles
(According to MIL-STD-202 , method 107)
6.2. Temperature humidity exposure :
+50 °C /95RH , 96hrs
(According to MIL-STD-202 , method 103)
6.3. Vibration test :
Random vibration , frequency 5-500Hz , sweep time :1 hr / axis /
Force : 2.4grams (According to MIL-STD-202 , method 204)
Page 11
Product Specification
CPF104IG
Data sheet subject to change without notice RDPS-POTS434(R0)10/16/2002
SHEET 11 OF 11
7. Mechanical condition:
7.1 : Dimension :
PHONE
DSL
LINE
Note :
1: Unit mm.
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