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Product Specification
MF609A
File No RDPS-MF038
Revision R0
System Application Micro Filter For ADSL CPE Side
Product Type POTS Splitter
Product Name MF609A
Date Jan. 23th, 2002
Gino Hung - 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.
Data sheet subject to change without notice RDPS-MF038(R0)01/23/2002
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Product Specification
MF609A
Table of contents
Item Description Page
1. Introduction ----------------------------------------------- 3
2. Reference ----------------------------------------------- 3
3. Abbreviations ----------------------------------------------- 4
Technical requirements
4.
4.1. Schematic ----------------------------------------------- 4
4.2. ZHP-r definition ----------------------------------------------- 4
4.3. Electrical specification ----------------------------------------------- 5
4.4. DC characteristic ----------------------------------------------- 7
4.5.1. On hook insertion loss ----------------------------------------------- 7
4.5.2 . Off hook insertion loss ----------------------------------------------- 8
4.5.3 . Return loss
4.5.3.1. Phone port return loss ----------------------------------------------- 9
4.5.3.2. Line port return loss ----------------------------------------------- 9
----------------------------------------------- 4
----------------------------------------------- 9
5. Environmental condition ----------------------------------------------- 10
5.1. EMC surge and power contact ----------------------------------------------- 10
5.2. Climatic condition ----------------------------------------------- 10
5.2.1. Operating temperature ----------------------------------------------- 10
5.2.2. Storage and transport ----------------------------------------------- 10
6. Reliability condition ----------------------------------------------- 11
6.1. Operation ----------------------------------------------- 11
6.2. Handling ----------------------------------------------- 11
6.3. Storage and transport ----------------------------------------------- 11
6.4. product safety ----------------------------------------------- 11
7. Mechanical condition
----------------------------------------------- 12
Data sheet subject to change without notice RDPS-MF038(R0)01/23/2002
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Product Specification
MF609A
1. Introduction:
The in-Line Micro filter has been specifically designed to implement the functionality of low
pass filter in G.Lite system. G.Lite technology is similar to full rate ADSL in using DMT
technology but operates at a lower data rate of up to 1.5Mbps downstream and 512Kbps
upstream,depending on line conditions and lengths.
ADSL Lite is proposed as a lower speed version of ADSL that will eliminate the need for
telecom to install and maintain a premises based POTS splitter. Recent field trials of DSL Lite
equipment jointly carried out by a group of manufacturers and a North America network
operator has proved the technology, achieving maximum data rate for distance up to 15000
feet, It was found necessary to include one or more low pass filters in series with the POTS
terminals in order to reliably achieve maximum data rates. For POTS voice band service , the
low pass filter provide protection from ADSL signal which may impact through non-line or
other effects remote devices(handset, fax, voice band modem etc)and central office
operation . For ADSL signal , it also provide protection from the high frequency transient and
impedance effect that occur during POTS operation(ringing transients , on-hook, off-hook
transient and so on).
Because the POTS 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 pots splitter to protect against line overstress which
could damage the splitter itself.
2. Reference:
Ref. 1 : ETS 300 001 Attachment to Public Switched Telephone Network
Ref. 2 : ANSI T1E1.4 In-Line Network and Customer Installation Interface
Filter standard
Ref. 3 : ITU-T K21 Resistibility of subscribers terminal to overvoltage and
overcurrents
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Product Specification
MF609A
3. Abbreviations:
ADSL Asymmetric Digital Subscriber Line
CO Central Office
CPE Customer Premise Equipment.
POTS Plain Old Telephone Service
RT Remote Terminal
DSL-NT Network termination of ADSL
4. Technical requirements:
4.1. Schematic:
The following drawing illustrate the schematic of this product.
4.2. ZHP-r definition :
To facilitate testing of the inline filter independently of the actual modem or specific
vendor,ZHP-r is defined to allow proper termination of the XDSL port during voice band
testing. The ZHP-r is valid only for voice band frequency. The combination of capacitors in
the ZHP-r is only representative. The input shall be 27nF however derived. ZHP-r
equivalent circuit is shown below :
0.056uF
0.47mH
0.056uF
Data sheet subject to change without notice RDPS-MF038(R0)01/23/2002
100 ohm
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Product Specification
MF609A
4.3. Electrical specification :
The low pass filter shall satisfy the following parametric limits with a complex impedance
ZNL shown in this table across the Line side of this device . The following requirement is
specified for a single splitter.
Splitter parameter
Range values
Frequency range
Splitter bandwith DC to 3.4KHz
Nominal voice band 200Hz to 4KHz
Billing tone 12KHz±80Hz
Ringing frequency 17Hz to 23Hz
ADSL band 25KHz to 12MHz
Line Impedance ZNL 1330ohm // (348ohm || 0.1µF)
Modem impedance 100 ohm
Operation voltage voice band
Nominal signal 21mVpp to 5.4 Vpp
Billing tone 10Vpp to 30.2Vpp
Ringing signal
DC voltage 0V to -80V ANSI 6.98
Electrical requirements
40Vrms to 106Vrms(113Vpp to
424 Vpp)
Max. AC voltage 150Vrms with -105VDC offset
Max. differential 320V
Current voice band
Loop current <90mA
Transient current(on/off hook) <90mA
DC Resistance
DC Resistance <25 ohm
Isolation resistance tip/ring >5 Mohm
Voice –band characteristic
Insertion loss (one splitter) on hook 1004Hz <1.5 ~ -0.5 dB
Insertion loss (with four added
parallel filters)
Insertion loss (one splitter) off hook 1004Hz <0.5 ~ -0.5 dB
Insertion loss (multiple five filters) 1004Hz <1.0 ~ -1.0 dB
1004Hz <6.5 ~ -1.0 dB
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Product Specification
MF609A
Splitter parameter
Insertion loss distortion (one splitter)
on hook (Relative to 1004Hz)
Insertion loss (multiple five filters)on
hook (Relative to 1004Hz)
Insertion loss distortion (one splitter)
off hook (Relative to 1004Hz)
Insertion loss (multiple five filters)off
hook (Relative to 1004Hz)
Return loss with four added parallel
filters phone side
Return loss with four added parallel
filters Line side
Electrical requirements
Range values
200Hz~1KHz
1KHz~2.8 KHz
200Hz~1KHz
1KHz~2.8 KHz
200Hz~3.4 KHz
3.4KHz~4.0 KHz
200Hz~3.4 KHz
3.4KHz~4.0 KHz
@ERL >9.0 dB
@SRLL >13.0dB
@SRLH >3 dB
@ERL >10 dB
@SRLL >12 dB
@SRLH >5 dB
<1.5 ~ -1.5 dB
<1.5 ~ -1.5 dB
<2 ~ -5.5 dB
<2 ~ -2 dB
<0.5 ~ -1.0 dB
<1.0 ~ -1.5 dB
<2.5 ~ -1.5 dB
<3.25 ~ -2.0 dB
Longitudinal conversion loss LCL 200Hz to 3KHz >53 dB
ADSL modem interface
Isolation voltage >2000Vrms for 1 minute
ADSL band characteristic
Stop band attenuation 25KHz<f<50KHz >21 dB
50KHz<f<1MHz >25 dB
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Product Specification
MF609A
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 10MΩ.
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
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MF609A
4.5.2. Off 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.
Product Specification
The test setup is shown in drawing below. :
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4.5.3. Return loss :
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:
Product Specification
MF609A
Return loss = 20 log ZL + ZM / ZL - ZMdB
Where ZL = the reference impedance
ZM = the measured impedance
The test setup is shown in drawing below:
4.5.3.1. Phone port return loss :
4.5.3.2. Line port return loss :
ZNL-r defined
Zoff defined
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Product Specification
MF609A
5. Environmental condition:
5.1. EMC , surge and power- contact:
The splitter has to comply with EMC Requirements as per ITU K21, so the following
requirements must be taken into consideration:
No Test Test specification Number of tests
1 Lightning surge simulation 1500V , 10/700µs , 200ms 10
2 Power induction 600V , 1s 5
3 Power contact 230V , 15 minute 1
5.2. Climatic condition:
5.2.1. Operating temperature:
Application indoor
Low ambient temperature -50C
High ambient temperature +450C
(according to ETS 300 019, class 3.2)
5.2.2. Storage and transport:
Low ambient temperature -400C
High ambient temperature +850C
(according to ETS 300 019, transport: class 2.3, storage: class 1.2)
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MF609A
6. Reliability condition:
6.1. Operation:
Test Test specification
Vibration sinusoidal
Shock(half sine)
6.2. Handling:
Product Specification
IEC 68 Part 2-6
10 to 58Hz 0,075mm
58 to 500Hz 10m/S2 ,
1octaver/minute
3 axis; every 10 cycles
IEC 68 Part 2-27
≤100kg 100m/ S
6 directions; every 3 shocks
2
11ms
Test Test specification
Freefall
6.3. Storage and transport:
Test Test specification
Vibration(random) IEC 68 Part 2-64
Bump IEC 68 Part 2-29
Freefall
6.4 . Product safety :
Test Test specification
Electrical hazard EN 60950 (A4), (≡VDE 0805)
Mechanical hazard EN 60950 (A4), (≡VDE 0805)
Fire hazard
IEC 68 Part 2-32 Stand alone:<10kg
75mm Built in:2x ground area
IEC 68 Part 2-32 <10kg 800mm
Twice at any possible
Transport position on concrete floor
EN 60950 (A4), (≡VDE 0805)
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MF609A
7. Mechanical condition:
Product Specification
Note :
1: Connect the line side of the microfilter to the wall jack and the phone side of the
microfilter to the phone.
2: Incorrect connection will significantly affect the performance and operation.
3 : Unless otherwise specified , all tolerance are mm(inch)±0.25(0.010)
Data sheet subject to change without notice RDPS-MF038(R0)01/23/2002
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