Datasheet MF608B Datasheet (YCL)

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

SHEET 1 OF 11

File No RDPS-MF036
Revision R4
System Application Asymmetric Digital Subscriber Line
Product Type Micro filter
Product Name MF608B
Date Feb. 26th, 2003

Feilong Chen - Design Engineer, R&D_1Issued By

[e-mail]

Roger Wu – Manager, R&D_1Approved By

[e-mail]

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.

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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Table of contents

Item Description Page

1. Introduction ----------------------------------------------- 3

2. Reference ----------------------------------------------- 3

3. Abbreviations ----------------------------------------------- 4

4.

Technical requirements

----------------------------------------------- 4

4.1. Schematic ----------------------------------------------- 4

4.2. Electrical specification ----------------------------------------------- 5

4.3. DC characteristic ----------------------------------------------- 7

4.4.ZHP-r definition ----------------------------------------------- 7

4.4. Test methodology ----------------------------------------------- 8

4.4.1. Insertion loss ----------------------------------------------- 8

4.4.2. Return loss ----------------------------------------------- 9

5 Environmental condition

----------------------------------------------- 10

5.1. Resistibility to overvoltage and
overcurrents

----------------------------------------------- 10

5.2. Climatic condition

----------------------------------------------- 10

5.2.1. Operating temperature

----------------------------------------------- 10

5.2.2. Storage and transport

----------------------------------------------- 10

5.2.3. Operating humidity

----------------------------------------------- 10

6 Reliabilty conditions

----------------------------------------------- 10

6.1.Thermal shock

----------------------------------------------- 10

6.2. Temperature humidity exposure

----------------------------------------------- 10

6.3. Vibration test

----------------------------------------------- 10

7. Mechanical condition ----------------------------------------------- 11

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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1. Introduction:

The MF608B is a “in – line” ( or distributed ) filter that has been specifically designed to
implement the functionality of low pass filter in POTS over ADSL application .

Asymmetric Digital Subscriber Line (ADSL) technology is dedicated , point to point , public
network access technology that allows multiple forms of data , voice , and video to be carried
over twisted-pair copper wire on the local loop between a network service provider’s(NSP’S)
central office and the customer site or within intra-campus / intra-building networks. Best of
all , ADSL delivers this high speed performance over existing copper telephone line all while

allowing traditional voice service to coexist without interruption through POTS low pass filters.

The MF608B integrates low pass filter that blocks the high frequency energy from reaching
the POTS device and provides isolation from impedance effects of the POTS device on ADSL.
In addition , this filter will also attenuate any wideband impulse noise generated by the POTS
device due to the interruption of loop current(e.g. pulse dialing or on hook / off hook
transfer)Because the POTS filter connects directly to the subscriber loop media , it must
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 filter to protect against line overstress which
could damage the filter itself.

2. Reference:

Ref. 1 : ETS 300 001 Attachment to Public Switched Telephone Network
Ref. 2 : SIN 346 Issue 2.1 BT ADSL INTERFACE DESCRIPTION
Ref. 3 : K21 Resistibility of subscribers terminal to overvoltages

and overcurrents.

Ref. 4 : ITU G992.1 Annex E Type1 - European

3

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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3. Abbreviations:

ADSL Asymmetric Digital Subscriber Line

CO Central Office
CPE Customer Premise Equipment.
POTS Plain Old Telephone Service
RT Remote Terminal

4. Technical requirements:

4.1. Schematic:

The following drawing illustrate the schematic of this product.

3

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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4.2. Electrical specification :

Electrical requirements

Splitter parameter

Range values

Frequency range

Nominal voice band 0.3KHz to 3.4KHz
Billing tone 50Hz
Ringing frequency 25Hz to 50Hz
ADSL band 30KHz to 1104KHz
Line Impedance ZL 320ohm + (1050ohm ||

230nF)

CO impedance ZTc 320ohm + (1050ohm ||

230nF)

RT impedance ZTr 320ohm + (1050ohm ||

230nF)

Modem impedance 30KHz< f< 1104KHz 100 ohm

Operation voltage voice band

Nominal signal <3.0 dBm
Billing tone 10Vpp to 30.2Vpp
Ringing signal <100Vrms
DC voltage 0V to 100V
Max. AC voltage 25Hz < f <50Hz 100Vrms with100VDC offset
Max. differential 242V

Current voice band

Loop current <100mA

Transient current(on/off hook) <150mA

DC Resistance

DC Resistance <=50 ohm
Isolation resistance between any
wire and earth

>10 Mohm

Isolation resistance between wires >1Mohm

Voice–band characteristic single
filter

Insertion loss 1KHz <1.0 dB
Attenuation distortion 200Hz<f<4KHz <±1 dB
Delay distortion 200Hz<f<4KHz <200 usec
CLI signal loss 200Hz<f<4KHz <3.0 dB

3

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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Electrical requirements

Splitter parameter

Range values
300Hz< f<500Hz >=14 dB
500Hz< f<2KHz >=18 dB

Return loss from line side

2KHz< f<3.4KHz >=14 dB
300Hz< f<500Hz >=14 dB
500Hz< f<2KHz >=18 dB

Return loss from phone side

2KHz< f<3.4KHz >=14 dB
50 to 600Hz >=46 dB

Longitudinal conversion loss LCL

600Hz to 3.4 KHz >=52 dB

Voice–band characteristic for
three filters

Insertion loss 1KHz <1 dB
Attenuation distortion 200Hz< f <4KHz ±1 dB
Return loss from phone side 200Hz< f <2KHz >18 dB

2KHz< f <3.4KHz >14 dB

ADSL modem interface

Isolation voltage >2000Vrms for 1 minute

ADSL band characteristic

32KHz >29 dB

Off-hook

200KHz<f<1104KHz >55 dB

32KHz >29 dB

Stop band attenuation

On-hook

350KHz<f<1104KHz >55 dB

Line side 25KHz<f<1104KHz >40 dB

Longitudinal balance

Phone side 25KHz<f<1104KHz >40 dB
From Line
to phone

26KHz<f<1104KHz >30 dB

Common-mode
insertion loss

From Line
to ADSL

26KHz<f<1104KHz >30 dB

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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4.3. 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 100V
and ringing signals of 40V to 100Vrms at any frequency from15.3Hz to 68Hz with a dc
component in the range from 0V to 100V. The dc resistance from tip-to-ring at the line port
interface with the phone interface shorted, shall be less than or equal to 50 ohms. 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.

4.4. ZHP-r Definition:

To facilitate testing of the In-Line Filter independently of the actual modem or specific
vendor,ZHP-r is defined to allow proper termination of the ADSL 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.

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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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 is 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 :

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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4.5.2 . Return loss :

Return loss measures the amount of lost energy due to reflection resulted from
impedance mismatching at the interface. Return loss is essentially defined as the ratio
of the incident power upon a given transmission system to the reflective power caused
by impedance mismatch with respect to reference impedance at the interface between
source and device. Return loss figure is a function of the impedance of the circuit
involved and therefore frequency dependent. These impedance must be closely
maintained in order to reduce the possibility of undesirable reflection and echoes
which results from long distance circuit of the telephone user and may destroy the data
being sent. To perform the return loss test , open ,short and 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 is listed: Return loss = 20 log ZL + ZM / ZL - ZMdB
Where ZL = the reference impedance ZM = the measured impedance

The test setup is shown in drawing below:

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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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)

Product Specification

MF608B

Data sheet subject to change without notice RDPS-MF036(R4)02/26/2003

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7. Mechanical condition:

4