electrical transmission performance testing of … · 2004. 4. 23. · cable and connecting...

Independent Testing - For End User Confidence

ELECTRICAL TRANSMISSION PERFORMANCE TESTING OFTELEBOX SCREENED CLASS E / CATEGORY 6 PERMANENT LINK

ACCORDING TO REQUIREMENTS OF 2ND EDITION ISO/IEC 11801, CENELEC EN 50173-1 AND ANSI/TIA/EIA-568-B.2-1

Cable and Connecting Hardware from Telebox:

Individual Foil and Overall Braid Screened Horizontal Cable, P/N SS9800X (Draka Norsk Kabel P/N 794411)Screened Wall Outlet, P/N TA2512-XXScreened Patch Panel, P/N LP246SXXScreened RJ 45 Plug, P/N TA5708FS

Prepared by Poul Villien

Project No. 104891 2004.03.16

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3P Project No. 104891

TABLE OF CONTENTS PAGE

1. IDENTIFICATION 3

2. SURVEY OVER THE WORK 4

3. APPLIED SPECIFICATIONS 6

3.1 Electrical Transmission 6 3.2 Safety 6

4. CONDITIONS OF TESTING 7

4.1 Identification of Permanent Link 74.2 Assembly of Permanent Link 74.3 Electrical Measurements 8

5. SUMMARIZED TEST RESULTS 10

5.1 Nominal Impedance 105.2 Return Loss 105.3 Attenuation 115.4 Near End Crosstalk 135.5 Attenuation to Crosstalk Ratio (ACR) 145.6 Equal Level Far End Crosstalk (ELFEXT) 155.7 DC Loop Resistance 175.8 DC Resistance Unbalance 175.9 Current Carrying Capacity 185.10 Propagation Delay 185.11 Delay Skew 195.12 Electromagnetic Performance 205.13 Longitudinal to Differential Conversion Loss (Balance) 205.14 Transfer Impedance 215.15 Wire Map 21

6. CONCLUSION 22

7. APPENDIX: Test Data Sheets 24

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1. IDENTIFICATION

Project No.: 104891

Subject: Electrical Transmission Performance Testing of Telebox Screened Class E /Category 6 Permanent Link according to Requirements of 2nd EditionISO/IEC 11801, CENELEC EN 50173-1 and ANSI/TIA/EIA-568-B.2-1

Identification ofPermanent Link: • Screened Wall Outlet from Telebox, P/N TA2512-XX

having PCB Marking ECT 2 C6 001-256 G4• Screened Patch Panel from Telebox, P/N LP246SXX

having PCB Marking 8-in-1 001-0864 1F00 T20A4161-A• Screened RJ 45 Plug from Telebox, P/N TA5708FS• Individual Foil and Overall Braid Screened Horizontal Cable from Telebox,

P/N SS9800X (Draka Norsk Kabel P/N 794411)

Supplier: Telebox Industries Corporation4F, No. 306,Sec. 1, Ta-Tung RoadHsi Chih ChenTaipei HsienTaiwan, R.O.C.

Prepared by: 3P Third Party TestingAgern Allé 3DK-2970 HoersholmDenmark

Email: [email protected]: + 45 45572200Fax: + 45 45765708Homepage: http://www.3Ptest.dk

Author: Poul Villien

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2. SURVEY OF THE WORK

3P has performed testing of a Telebox permanent link according to Class E / Category 6requirements. The permanent link is constructed using individual foil and overall braid screenedhorizontal cable connected with screened RJ 45 connecting hardware.

Testing was carried out under laboratory conditions at 3P in March 2004.

The applied permanent link configuration is according to definition in ISO/IEC 11801, CENELECEN 50173-1 and ANSI/TIA/EIA-568-B.1. No consolidation point and the specified maximumhorizontal cable length is applied. Furthermore, it has been verified that the performance of a shortpermanent link consisting of 30 metres of horizontal cable also complies with the requirements.This additional testing concerns the critical noise parameters of return loss, and pair-pair andpower sum near end crosstalk.

One permanent link sample was subjected to a complete permanent link test programme accordingto Class E requirements of the 2nd edition ISO/IEC 11801 and the CENELEC EN 50173-1standards, and Category 6 requirements of the ANSI/TIA/EIA-568-B.2-1 specification. Measure-ments have been carried out to 650 MHz, but reported results from 250 MHz to 650 MHz arepresented for information only.

The permanent link contains a wall outlet which has different PCB designs, and consequentlysligthly different performance, of the left and right port positions. The presented data and thepositive conclusion of the report is based on worst case performance of the two different portpositions.

The permanent link was assembled by 3P and consisted of:

• Screened RJ 45 plug from Telebox patch cord

• Screened wall outlet from Telebox

• 90,0 metres of individual foil and overall braid screened horizontal cable in LS0H versionfrom Telebox

• Screened patch panel from Telebox


The electrical performance of the horizontal cable, wall outlet and patch panel of the permanentlink has been manufacturer verified.

The transfer impedance of the horizontal cable, and wall outlet and patch panel, terminated withthe horizontal cable of the permanent link, has been evaluated in connection with the presentpermanent link testing and complies with the requirements for components of a Class E /Category 6 permanent link.

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The overall result of the testing is that the tested Telebox two connector permanent link complieswith the Class E / Category 6 requirements. However, one observation of formal nature has beenmade:

• The near end balance measured as LCL does not comply with the requirements specified inANSI/TIA/EIA-568-B.2-1 for one of the four tested pairs when measured from the wall outletend. These requirements are not mandatory and there is full compliance with the balancerequirements specified in the 2nd edition ISO/IEC 11801 and EN 50173-1 standards.

3P therefore can recommend the Telebox two connector permanent link, consisting of acombination of the following cable and connecting hardware:

• Individual Foil and Overall Braid ScreenedHorizontal Cable from Telebox, P/N SS9800X (Draka Norsk Kabel P/N 794411)

• Screened Wall Outlet from Telebox, P/N TA2512-XXhaving PCB Marking ECT 2 C6 001-256 G4

• Screened Patch Panel from Telebox, P/N LP246SXXhaving PCB Marking 8-in-1 001-0864 1F00T20A4161-A

• Screened RJ 45 Plug from Telebox, P/N TA5708FS

for screened Class E / Category 6 installations.

The general recommendation of the Telebox two connector permanent link for screened Class E/ Category 6 installations is made on the premise that all connecting hardware and cable have andmaintain a quality and performance level corresponding to the ones of the components of thepresently tested permanent link, are correctly terminated according to the Telebox instructions,and are installed using proper workmanship in compliance with all specified and relevantinstallation guidelines.

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3. APPLIED SPECIFICATIONS

3.1 Electrical Transmission

The following specifications have been verified by 3P for the permanent link testing, and theconnecting hardware and horizontal cable qualifications:

Permanent Link Testing:

• ISO/IEC 2nd Edition Generic Cabling Standard 11801, Class E

• CENELEC Generic Cabling Standard EN 50173-1, Class E

• ANSI/TIA/EIA Generic Cabling Standard 568-B.2-1, Cat. 6

Connecting Hardware Testing:

The performance of the connecting hardware has been manufacturer verified.

Horizontal Cable Testing:

The performance of the horizontal cable has been manufacturer verified.

3.2 Safety

Safety requirements for the horizontal cable has been manufacturer verified.

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Figur 4.1 Applied Permanent Link Configuration

4. CONDITIONS OF TESTING

4.1 Identification of the Permanent Link

The applied permanent link configuration is shown in figure 4.1 and is according to definition inISO/IEC 11801, CENELEC EN 50173-1, and ANSI/TIA/EIA-568-B.1. No consolidation pointand the specified maximum horizontal cable length is applied.

One permanent link sample was included in the testing. The permanent link testing covers thefollowing horizontal cable and connecting hardware, which have been manufacturer verified:






Furthermore, additional testing of return loss, and pair-pair and power sum near end crosstalkhas been carried out on a short permanent link consisting of 30 metres of horizontal cable.

The connecting hardware was assembled with colour coding of pairs according to designationT568B of ANSI/TIA/EIA-568-B.1.

4.2 Assembly of Permanent Link

The assembly of the permanent link has been performed by 3P.

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4.3 Electrical Measurements

The following electrical parameters have been measured for all pairs or combination of pairs ofthe permanent link:

• Return loss from 1 - 650 MHz, measured from both ends of the permanent link

• Attenuation from 1- 650 MHz

• Pair - pair near end crosstalk from 1 - 650 MHz, measured from both ends of the permanentlink

• Power sum near end crosstalk from 1 - 650 MHz, measured from both ends of the permanentlink

• Pair - pair attenuation to crosstalk ratio (ACR) from 1 - 650 MHz, measured from both endsof the permanent link

• Power sum attenuation to crosstalk ratio (PS-ACR) from 1 - 650 MHz, measured from bothends of the permanent link

• Pair - pair equal level far end crosstalk from 1 - 650 MHz, measured for all 2×6 paircombinations

• Power sum equal level far end crosstalk from 1 - 650 MHz, measured for all 2×4 pairs

• DC loop resistance

• DC resistance unbalance

• Current carrying capacity

• Propagation delay from 1 - 650 MHz

• Delay skew from 1 - 650 MHz

• Longitudinal to differential conversion loss (balance), measured as LCL at 100 kHz and from1 - 250 MHz from both ends of the permanent link

• Longitudinal to differential conversion loss (balance), measured as LCTL at 100 kHz, 1 MHzand 10 MHz from both ends of the permanent link

• Wire map

The transfer impedance of the horizontal cable, and wall outlet and patch panel, terminated withthe horizontal cable of the permanent link, has been evaluated in connection with the presentpermanent link testing.

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The following instruments were applied for the electrical measurements of the permanent link:

• HP Network Analyzer, type 8753D with internal S-parameter Test Set

• HP Network Analyzer, type 8753ES with internal S-parameter Test Set

• North Hills Baluns, types 0320BF, 0322BF and NH13734

• BH Electronics Baluns, type 040-0093

• 3P Baluns, type 3P-600-Cat7

• HP LCR Meter, type 4263A

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5. SUMMARIZED TEST RESULTS

Summarized test results are presented in the following clauses, while recordings of electricalperformance versus frequency are found in the appendix. The tables in the present sectiongenerally inform about the headroom to a specified worst case limiting function which is presentedunder the table concerned. The various recordings of electrical performance versus frequency inthe appendix contains, in red colour, the limiting function specified for the parameter in question.

3P has performed testing according to Class E / Category 6 requirements. Measurements havebeen carried out to 650 MHz, but reported results from 250 MHz to 650 MHz are presented forinformation only.

The permanent link is constructed according to the two connector model using individual foil andoverall braid screened horizontal cable and screened RJ 45 connecting hardware.

The permanent link contains a wall outlet which has different PCB designs, and consequentlysligthly different performance, of the left and right port positions. The presented data concernsworst case measurements of the two different port positions.

5.1 Nominal Impedance

Nominal impedance has been specified as 100 Ω. Consequently the return loss measurements havebeen performed using a 100 Ω end termination.

CENELEC EN 50173-1 and ISO/IEC 11801 specify that the nominal impedance is a design valuewhich is not intended for testing. Return loss is the relevant parameter applied for testing ofreflections caused by characteristic impedance variations in cables, return loss of connectors andmismatch of impedances of the cables of links and channels.

The results of the return loss measurements are presented in clause 5.2.

5.2 Return Loss

Summarized results of the testing are found in table 5.2, and include all four tested pairs measuredfrom both ends of the permanent link. Recordings of return loss versus frequency from both endsof the 90 metres permanent link are found in pages 25 and 26 of the appendix.

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Table 5.2 Summarized Results of Return Loss Measurements from1 MHz to 650 MHz

PAIR RETURN LOSSMARGIN TO LIMIT (dB)1

Wall Outlet2 Patch Panel2

90 metres3 30 metres3 90 metres3 30 metres3

1/23/64/57/8

5,2 ( 4,7)5,0 (13,4)3,8 ( 6,9)5,9 ( 6,7)

3,4 ( 4,6)3,7 (11,1)4,2 ( 6,5)3,5 ( 6,3)

6,4 (5,4)3,2 (7,0)4,3 (5,9)4,5 (6,4)

3,3 (5,0)4,2 (8,3)2,9 (4,2)3,1 (5,8)

: Return Loss requirements are defined by the function:1

1 MHz - 3 MHz: 21+4log( ) dB

3 MHz - 40 MHz: 26-5log(f) dB

40 MHz - 250 MHz: 34-10log(f) dB,

where f is frequency in MHz. Calculated requirements below 21,0 dB are equaledto this value. Requirements over 250 MHz are not specified and are presented forinformation only.

: The first coloumn is the measurement of the 90 metres two connector permanent2

link, while the second column concerns the measurement of the 30 metres twoconnector permanent link.

: The first value for each pair gives the worst case margin to the normative limit3

from 1 MHz to 250 MHz, while the value in brackets represents the worst casemargin to the informative limit from 250 MHz to 650 MHz.

It is concluded from table 5.2 and return loss recordings in pages 25 and 26 that return losscomplies with the specified Class E / Category 6 requirements in the complete frequency rangefrom 1 MHz to 250 MHz seen from both ends of the permanent link.

5.3 Attenuation

Summarized results of the testing are found in tables 5.3.1 and 5.3.2, and include all four testedpairs measured from one end of the permanent link. Table 5.3.1 presents measured values atspecific selected key frequencies while table 5.3.2 specifies the worst case margin to limit (in pct.).Recordings of attenuation versus frequency are found in page 27 of the appendix.

Tables 5.3.1 and 5.3.2, and the attenuation recordings in page 27 are making reference to theattenuation limits at the nominal temperature of 20,0°C. However, due to temperature variationsat the laboratory facilities the actually applied test temperature was 20,5°C. The degradation ofattenuation with temperature of screened cables is in international standards specified to bemax. 0,2 %/°C between 20°C and 60°C. Only small variations in temperature dependence ofscreened cable attenuation exists on the market and it is therefore generally not necessary to seekproduct specific information about temperature dependence of the attenuation from the screenedcable supplier.

If the specified values are assumed to apply for the cable of the presently tested permanent linkthen no cabling design modification is required below 47°C. Over this temperature a worst case

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reduction of the maximum allowed horizontal cable length by 0,21 m/°C between 20°C and 60°Cwill secure safe running of the presently tested permanent link at any higher temperature. Thismeans at 60°C, for instance, that a reduction of the totally allowed maximum horizontal cablelength by 3 m or more will be a convenient way to avoid temperature problems for an installationusing the tested permanent link (with reservation for actual temperature performance ofattenuation).

Table 5.3.1 Results of Attenuation Measurements from 1 MHzto 650 MHz

PAIR MAX. ATTENUATION (dB)

1MHz

4MHz

10MHz

100MHz

200MHz

250MHz

650MHz

1/23/64/57/8

1,81,81,81,8

3,33,33,33,3

5,15,15,15,1

16,917,017,016,9

24,324,324,324,2

27,327,727,327,2

45,445,645,745,4

Specified 1,9 3,6 5,5 18,3 26,8 30,3 -

Table 5.3.2 Summarized Results of Attenuation Mea-surements from 1 MHz to 650 MHz

PAIR ATTENUATIONMARGIN TO LIMIT (%)1,2

1/23/64/57/8

5,8 (10,1)5,6 ( 8,6)5,2 (10,0)5,7 (10,4)

: Attenuation requirements are defined by the function:1

1 - 4 MHz: 1,6872 + 0,0153·f + + 0,00015·f dB1,5

4 - 250 MHz: 1,6780 + 0,0152·f + dB,

where f is frequency in MHz. Requirements over 250 MHz arenot specified and are presented for information only.

: The first value for each pair gives the worst case margin to the2

normative limit from 1 MHz to 250 MHz, while the value inbrackets represents the worst case margin to the informativelimit from 250 MHz to 650 MHz.

It is concluded from tables 5.3.1 and 5.3.2 and attenuation recordings in page 27 that attenuationcomplies with the specified Class E / Category 6 requirements in the complete frequency rangefrom 1 MHz to 250 MHz.

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5.4 Near End Crosstalk

Summarized results of the testing are found in tables 5.4.1 and 5.4.2 for pair-pair near endcrosstalk and power sum near end crosstalk, respectively, and include all six combinations of thefour tested pairs and all four tested pairs measured from both ends of the permanent link.Recordings of both pair-pair and power sum near end crosstalk versus frequency from both endsof the 90 metres permanent link are found in pages 28 - 29 and pages 30 - 31 of the appendix.

Table 5.4.1 Summarized Results of Pair - Pair Near End Crosstalk Mea-surements from 1 MHz to 650 MHz

COMBINATIONOF PAIRS

PAIR - PAIR NEXTMARGIN TO LIMIT (dB)1



1/2 - 3/61/2 - 4/51/2 - 7/83/6 - 4/53/6 - 7/84/5 - 7/8

9,2 ( -2,4) 6,4 ( 0,7)20,5 (18,2) 7,0 ( -7,0)10,0 ( 1,1) 5,8 ( -2,0)

8,3 ( 2,2) 6,4 ( 2,6)16,4 (16,9) 8,2 ( -5,9) 9,8 ( -0,1) 5,6 ( -1,2)

12,2 ( 3,4) 5,8 ( -0,8)18,4 (17,7) 9,8 ( -6,6)11,0 ( -2,1) 9,6 ( 3,5)

10,6 ( -0,7) 6,3 ( -1,1)18,3 (19,1) 9,0 ( -6,1)10,3 ( -1,9) 9,4 ( 3,6)

: Pair - Pair NEXT requirements are defined by the function:1

-20log(10 + 10 ) dB,(-3,715+0,75log(f)) (-4,700 + log(f))

where f is frequency in MHz. Calculated requirements more strict than 65,0 dB areequaled to this value. Requirements over 250 MHz are not specified and are presented forinformation only.

: The first coloumn is the measurement of the 90 metres two connector permanent link,2

while the second column concerns the measurement of the 30 metres two connectorpermanent link.

: The first value for each pair combination gives the worst case margin to the normative3

limit from 1 MHz to 250 MHz, while the value in brackets represents the worst casemargin to the informative limit from 250 MHz to 650 MHz.

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Table 5.4.2 Summarized Results of Power Sum Near End CrosstalkMeasurements from 1 MHz to 650 MHz

PAIR POWER SUM NEXTMARGIN TO LIMIT (dB)1



1/23/64/57/8

7,5 (-0,5)7,8 (-5,9)4,6 (-5,5)7,1 (-0,6)

6,9 ( 2,4)8,4 (-4,1)4,9 (-4,5)7,0 (-0,6)

8,3 ( 0,5)9,5 (-5,2)6,2 (-5,1)9,8 ( 0,0)

8,7 (-1,0)9,2 (-5,2)6,6 (-4,6)9,4 (-0,1)

: Power Sum NEXT requirements are defined by the function:1

-20log(10 + 10 ) dB,(-3,615+0,75log(f)) (-4,500 + log(f))

where f is frequency in MHz. Calculated requirements more strict than 62,0 dB areequaled to this value.

: The first coloumn is the measurement of the 90 metres two connector permanent link,2

while the second column concerns the measurement of the 30 metres two connectorpermanent link.

: The first value for each pair gives the worst case margin to the normative limit from3

1 MHz to 250 MHz, while the value in brackets represents the worst case margin tothe informative limit from 250 MHz to 650 MHz.

It is concluded from table 5.4.1 and pair - pair near end crosstalk recordings in pages 28 and 29that pair - pair near end crosstalk complies with the specified Class E / Category 6 requirementsin the complete frequency range from 1 MHz to 250 MHz seen from both ends of the permanentlink.

It is concluded from table 5.4.2 and power sum near end crosstalk recordings in pages 30 and 31that power sum near end crosstalk complies with the specified Class E / Category 6 requirementsin the complete frequency range from 1 MHz to 250 MHz seen from both ends of the permanentlink.

5.5 Attenuation to Crosstalk Ratio (ACR)

Summarized results of the testing are found in table 5.5, and include all four pairs measured asboth pair - pair ACR and power sum ACR from both ends of the permanent link. Recordings ofboth pair-pair and power sum ACR versus frequency from both ends of the permanent link arefound in pages 32 - 33 and pages 34 - 35 of the appendix.

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Table 5.5 Summarized Results of ACR Measurementsfrom 1 MHz to 650 MHz

PAIR ACR MARGIN TO LIMIT (dB)

Pair - Pair1 Power Sum2

Wall Outlet3 PatchPanel3 Wall Outlet3 Patch

Panel3

1/23/64/57/8

8,2 ( 4,8)9,7 ( 0,1)8,2 (-0,6)8,9 ( 5,2)

8,8 ( 6,2)10,6 ( 0,3) 8,8 (-1,0)12,6 ( 5,1)

8,8 (6,7)10,5 (1,1) 7,6 (0,5)10,2 (6,5)

11,3 (7,8)10,6 (1,7) 9,2 (0,9)12,8 (7,0)

: Pair - Pair ACR requirements are defined by the function:1

Pair-Pair NEXT - Attenuation (dB),

where f is frequency in MHz.: Power Sum ACR requirements are defined by the function:2

Power Sum NEXT - Attenuation (dB),

where f is frequency in MHz.: The first value for each pair gives the worst case margin to the3

normative limit from 1 MHz to 250 MHz, while the value inbrackets represents the worst case margin to the informative limitfrom 250 MHz to 650 MHz.

It is concluded from table 5.5 and pair - pair ACR recordings in pages 32 and 33 that pair - pairACR complies with the specified Class E / Category 6 requirements in the complete frequencyrange from 1 MHz to 250 MHz seen from both ends of the permanent link.

It is concluded from table 5.5 and power sum ACR recordings in pages 34 and 35 that power sumACR complies with the specified Class E / Category 6 requirements in the complete frequencyrange from 1 MHz to 250 MHz seen from both ends of the permanent link.

5.6 Equal Level Far End Crosstalk (ELFEXT)

Summarized results of the testing are found in tables 5.6.1 and 5.6.2 for pair-pair equal level farend crosstalk and power sum equal level far end crosstalk, respectively, and include all 2×6combinations the four tested pairs and 2×4 tested pairs. For each of the six pair combinationsmeasurements are carried out with transmission on one pair and receiving on the other followedby measurement after interchanging transmitting and receiving pairs. The recordings of each ofthese two possible pairs for transmission are found in pages 36 - 37 and pages 38 - 39 of theappendix for pair-pair and power sum far end crosstalk versus frequency, respectively.

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Table 5.6.1 Summarized Results of Pair - Pair EqualLevel Far End Crosstalk Measurementsfrom 1 MHz to 650 MHz.

COMBINATIONOF PAIRS

PAIR - PAIR ELFEXTMARGIN TO LIMIT (dB)1

Transmitting onFirst Pair2

Transmitting onSecond Pair2

1/2 - 3/61/2 - 4/51/2 - 7/83/6 - 4/53/6 - 7/84/5 - 7/8

11,8 ( 9,8)21,9 (18,2)34,1 (25,8)22,1 (14,6)17,3 (16,3)23,7 (12,4)

11,9 (10,2)22,0 (18,6)32,3 (31,1)23,8 (14,6)20,3 (21,1)23,8 (17,7)

: Pair - Pair ELFEXT requirements are defined by the function:1

-20log(10 + 2·10 ) dB,(-3,390+log(f)) (-4,155+log(f))

where f is frequency in MHz.: The first value for each pair combination gives the worst case margin2

to the normative limit from 1 MHz to 250 MHz, while the value inbrackets represents the worst case margin to the informative limit from250 MHz to 650 MHz.

Table 5.6.2 Summarized Results of Power Sum EqualLevel Far End Crosstalk Measurementsfrom 1 MHz to 650 MHz

PAIR POWER SUM ELFEXTMARGIN TO LIMIT (dB)1

Transmitting onthe Pair2

Receiving onthe Pair2

1/23/64/57/8

14,4 (12,8)14,5 (12,4)22,1 (14,7)20,1 (14,8)

14,5 (12,6)14,6 (12,5)22,8 (16,3)22,5 (19,8)

: Power Sum ELFEXT requirements are defined by the function:1

-20log(10 + 2·10 ) dB,(-3,240+log(f)) (-4,005+log(f))


normative limit from 1 MHz to 250 MHz, while the value in bracketsrepresents the worst case margin to the informative limit from250 MHz to 650 MHz.

It is concluded from table 5.6.1 and pair - pair equal level far end crosstalk recordings in pages 36and 37 that pair - pair equal level far end crosstalk complies with the specified Class E /Category 6 requirements in the complete frequency range from 1 MHz to 250 MHz for all2×6 combination of pairs.

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It is concluded from table 5.6.2 and power sum equal level far end crosstalk recordings inpages 38 and 39 that power sum equal level far end crosstalk complies with the specified Class E/ Category 6 requirements in the complete frequency range from 1 MHz to 250 MHz for all2×4 pairs.

5.7 DC Loop Resistance

Results of the testing are found in table 5.7, and include all four tested pairs measured from oneend of the permanent link.

The measurement of DC loop resistance is carried out at room ambient temperature and resultsare equalled to 20°C by calculation. A degradation of DC loop resistance with temperature mustalways be accommodated for by the design of the installation, for instance by making a total cablelength reduction taking into account the temperature effects on the DC loop resistance at thehighest temperature for which the installation is intended to run. The worst case temperatureeffect can be expected to be 0,4 %/°C.

For the permanent link in question no cabling design modification will in reality be required fromtemperature degradation of DC loop resistance due to its very large headroom to the limit. Designreductions imposed by temperature degradation of attenuation are discussed in clause 5.3.

Table 5.7 Results of DC Loop Resistance Measurements

PAIR DC LOOP RESISTANCE (Ω)

Measured Specified

1/23/64/57/8

13,113,413,813,3

Max. 20,6Max. 20,6Max. 20,6Max. 20,6

It is concluded from table 5.7 that DC loop resistance complies with the specified Class E /Category 6 requirements.

5.8 DC Resistance Unbalance

Results of the testing are found in table 5.8, and include all 8 tested conductors measured fromone end of the permanent link.

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Table 5.8 Results of DC Resistance Unbalance Measure-ments

CONDUCTIVE DC RESISTANCE UNBALANCEPATH Measured

Resistance(Ω)

ConductorResistanceUnbalance

(Ω)

PairResistanceUnbalance

(%)

12364578

6,66,66,56,86,96,66,66,7

0,40,30,40,20,40,30,30,3

0,4

1,9

2,5

0,3

Specified - - Max. 3,0

It is concluded from table 5.8 that DC resistance unbalance complies with the specified Class E/ Category 6 requirements.

5.9 Current Carrying Capacity

Current carrying capacity has been measured by subjecting each conductor and the screen to asimultaneous exposure of 0,175 A at 60°C for 30 minutes.

Continuity of conductor and screen paths was maintained. No degradation of cable or connectinghardware was observed after the testing.

It is concluded that current carrying capacity complies with the specified Class E / Category 6requirements.

5.10 Propagation Delay

Summarized results of the testing are found in table 5.10, and include all four tested pairsmeasured from one end of the permanent link. Recordings of propagation delay versus frequencyare found in page 40 of the appendix.

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Table 5.10 Summarized Results of Propagation DelayMeasurements from 1 MHz to 650 MHz

PAIR PROPAGATION DELAY MARGIN TO LIMIT (nsec)1,2

1/23/64/57/8

82 (93)85 (96)85 (96)83 (94)

: Propagation Delay requirements are defined by the function:1

486 + nsec,


normative limit from 1 MHz to 250 MHz, while the value inbrackets represents the worst case margin to the informative limitfrom 250 MHz to 650 MHz.

It is concluded from table 5.10 and the propagation delay recordings in page 40 that propagationdelay complies with the specified Class E / Category 6 requirements in the complete frequencyrange from 1 MHz to 250 MHz.

5.11 Delay Skew

Summarized results of the testing are found in table 5.11, and include all six combinations of thefour tested pairs measured from one end of the permanent link. Recordings of delay skew versusfrequency are found in page 41 of the appendix.

Table 5.11 Summarized Results of Delay Skew Measure-ments from 1 MHz to 650 MHz

COMBINATION OF PAIRS

DELAY SKEW (nsec)1

1/2 - 3/61/2 - 4/51/2 - 7/83/6 - 4/53/6 - 7/84/5 - 7/8

Max. 4 ( 3)Max. 4 ( 2)Max. 2 ( 1)Max. 0 ( 0)Max. 2 ( 2)Max. 2 ( 2)

Specified Max. 43 ( - ): The first value for each pair combination gives the worst case margin to1

the normative limit from 1 MHz to 250 MHz, while the value in bracketsrepresents the worst case margin to the informative limit from 250 MHzto 650 MHz.

It is concluded from table 5.11 and the delay skew recordings in page 41 that delay skew complieswith the specified Class E / Category 6 requirements in the complete frequency range from 1 MHzto 250 MHz.

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5.12 Electromagnetic Performance

Electromagnetic performance of permanent links and channels can be measured as couplingattenuation, and this test method has now been agreed for publication.

Coupling attenuation is formed by the sum of balance and, in case of screened cabling, ofscreening attenuation. Normative balance and screening performance requirements have beensuccessfully passed by the present permanent link testing as concluded in clauses 5.13 and 5.14,respectively.

Electromagnetic performance recorded as the worst case coupling attenuation value for anycomponent and connection point of the permanent link has not been included in the present testprogramme.

5.13 Longitudinal to Differential Conversion Loss (Balance)

Summarized results of the testing are found in tables 5.13.1 and 5.13.2 for balance measured asLCL and LCTL, respectively, and include all four tested pairs measured from both ends of thepermanent link. Recordings of LCL versus frequency from both ends of the permanent link arefound in pages 42 - 43 of the appendix.

Table 5.13.1 Summarized Results of Balance (LCL) Measurements from 100 kHz to250 MHz

PAIR BALANCE AS LCL (dB)

Wall Outlet Patch Panel

100kHz

1MHz

10MHz

Margin tolimit1

100kHz

1MHz

10MHz

Margin tolimit1

1/23/64/57/8

79696678

66646466

61524861

4,2 5,3-3,0 3,6

70656669

64655767

57534660

5,44,72,13,2

Specified 45 40 30 0,0 45 40 30 0,0: Requirements to Balance, measured as LCL, are defined by the function:1

1 - 10 MHz: 40 dB

10 - 250 MHz: 50 - 10log(f) dB,

where f is frequency in MHz.

of 43


Table 5.13.2 Results of Balance (LCTL) Measurements from100 kHz to 10 MHz

PAIR BALANCE AS LCTL (dB)

Wall Outlet Patch Panel

100kHz

1MHz

10MHz

100kHz

1MHz

10MHz

1/23/64/57/8

75666379

67625973

59564660

75666379

67605977

59554660

Specified 45 40 30 45 40 30

It is concluded from table 5.13.1 and the LCL recordings in pages 42 and 43 that thelongitudinal to differential conversion loss measured as LCL (near end balance) violates theCategory 6 requirements specified in ANSI/TIA/EIA-568-B.2-1 for one of the four testedpairs when measured from the wall outlet end. These requirements are not mandatory and thereis full compliance with the Class E near end balance requirements specified in the 2nd editionISO/IEC 11801 and EN 50173-1 standards.

It is concluded from table 5.13.2 that the longitudinal to differential conversion loss measured asLCTL (far end balance) complies with the specified Class E / Category 6 requirements seen fromboth ends of the permanent link.

5.14 Transfer Impedance


5.15 Wire Map

Wire map of the permanent link has been measured using a conventional field tester. Thepermanent link has correct termination of wires.

of 43


6. CONCLUSION

Electrical transmission performance testing of a Telebox two connector permanent link consistingof






has shown compliance with the Class E / Category 6 requirements. However, one observation offormal nature has been made:

• The near end balance measured as LCL does not comply with the requirements specified inANSI/TIA/EIA-568-B.2-1 for one of the tested pairs when measured from the wall outlet end.These requirements are not mandatory and there is full compliance with the balancerequirements specified in the 2nd edition ISO/IEC 11801 and EN 50173-1 standards.

Furthermore, it has been verified that the performance of a short two connector permanent linkconsisting of 30,0 metres of horizontal cable also complies with the requirements. This additionaltesting concerns the critical noise parameters of return loss, and pair-pair and power sum near endcrosstalk.

The permanent link contains a wall outlet which has different PCB designs, and consequentlysligthly different performance, of the left and right port positions. The presented data and thepositive conclusion of the report is based on worst case performance the two different portpositions.

Measurements have been carried out to 650 MHz, but reported results from 250 MHz to 650 MHzare presented for information only.

The electrical performance of the horizontal cable, wall outlet and patch panel of the permanentlink has been manufacturer verified.


of 43


3P therefore can recommend the Telebox two connector permanent link, consisting of acombination of the following cable and connecting hardware:

• Individual Foil and Overall Braid ScreenedHorizontal Cable from Telebox, P/N SS9800X (Draka Norsk Kabel P/N 794411)

• Screened Wall Outlet from Telebox, P/N TA2512-XXhaving PCB Marking ECT 2 C6 001-256 G4

• Screened Patch Panel from Telebox, P/N LP246SXXhaving PCB Marking 8-in-1 001-0864 1F00T20A4161-A

• Screened RJ 45 Plug from Telebox, P/N TA5708FS

for screened Class E / Category 6 installations.

The general recommendation of the Telebox two connector permanent link for screened Class E/ Category 6 installations is made on the premise that all connecting hardware and cable have andmaintain a quality and performance level corresponding to the ones of the components of thepresently tested permanent link, are correctly terminated according to the Telebox instructions,and are installed using proper workmanship in compliance with all specified and relevantinstallation guidelines.

of 43


7. APPENDIX: Test Data Sheets

Test record sheets for all pairs or pair combinations from the permanent link testing are found inthe following pages:

Pages 25 - 26 Recordings of return loss from 1 MHz to 650 MHz. Recordings are included fromboth wall outlet and patch panel ends.

Page 27 Recordings of attenuation from 1 MHz to 650 MHz.

Pages 28 - 29 Recordings of pair - pair near end crosstalk from 1 MHz to 650 MHz. Recordingsare included from both wall outlet and patch panel ends.

Pages 30 - 31 Recordings of power sum near end crosstalk from 1 MHz to 650 MHz. Recordingsare included from both wall outlet and patch panel ends.

Pages 32 - 33 Recordings of pair - pair attenuation to crosstalk ratio (ACR) from 1 MHz to650 MHz. Recordings are included from both wall outlet and patch panel ends.

Pages 34 - 35 Recordings of power sum attenuation to crosstalk ratio (PS-ACR) from 1 MHz to650 MHz. Recordings are included from both wall outlet and patch panel ends.

Pages 36 - 37 Recordings of pair-pair equal level far end crosstalk from 1 MHz to 650 MHz.Recordings are included for transmission on each of the two pairs of all paircombinations.

Pages 38 - 39 Recordings of power sum equal level far end crosstalk from 1 MHz to 650 MHz.Recordings are included for both transmission and receiving on each pair.

Page 40 Recordings of propagation delay from 1 MHz to 650 MHz.

Page 41 Recordings of delay skew from 1 MHz to 650 MHz.

Pages 42 - 43 Recordings of balance measured as LCL from 1 MHz to 250 MHz. Recordings areincluded from both wall outlet and patch panel ends.

Date: 2004.03.11

of 430 MHz

Blue pair: Pos. 4/5Orange pair: Pos. 1/2Green pair: Pos. 3/6Brown pair: Pos. 7/8

Limiting function:Class E / Category 6 limit:

The Return Loss for all four pairsmeasured from wall outlet end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Return Loss for allfour pairs from 1 MHz to 650 MHzmeasured from wall outlet end.

100 300 400 500200

Date: 2004.03.11

of 430 MHz



The Return Loss for all four pairsmeasured from patch panel end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Return Loss for allfour pairs from 1 MHz to 650 MHzmeasured from patch panel end.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Attenuation for all four pairscomplies with the specified Class E /Category 6 limit in the completefrequency range from 1 MHz to250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Attenuation for allfour pairs from 1 MHz to650 MHz.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz

Blue/orange pairs: 4/5 – 1/2Blue/green pairs: 4/5 – 3/6Blue/brown pairs: 4/5 – 7/8Orange/green pairs: 1/2 – 3/6Orange/brown pairs: 1/2 – 7/8Green/brown pairs: 3/6 – 7/8


The Near End Crosstalk for all sixpair combinations measured fromwall outlet end complies with thespecified Class E / Category 6 limitin the complete frequency rangefrom 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Near End Crosstalkfor all six pair combinations from1 MHz to 650 MHz measured fromwall outlet end.

100 200 300 400 500

Date: 2004.03.09

of 430 MHz



The Near End Crosstalk for all sixpair combinations measured frompatch panel end complies with thespecified Class E / Category 6 limitin the complete frequency rangefrom 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Near End Crosstalkfor all six pair combinations from1 MHz to 650 MHz measured frompatch panel end.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Power Sum Near End Crosstalkfor all four pairs measured from walloutlet end complies with the speci-fied Class E / Category 6 limit in thecomplete frequency range from1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Power Sum NearEnd Crosstalk for all four pairsfrom 1 MHz to 650 MHz measuredfrom wall outlet end.

100 200 300 400 500

Date: 2004.03.09

of 430 MHz



The Power Sum Near End Crosstalkfor all four pairs measured frompatch panel end complies with thespecified Class E / Category 6 limitin the complete frequency rangefrom 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Power Sum NearEnd Crosstalk for all four pairsfrom 1 MHz to 650 MHz measuredfrom patch panel end.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Pair to Pair Attenuation toCrosstalk Ratio for all four pairsmeasured from wall outlet end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


-20 dB

80 dB650 MHz

0

20

40

60

Recordings of Pair to Pair Atte-nuation to Crosstalk Ratio for allfour pairs from 1 MHz to 650 MHzmeasured from wall outlet end.

100 200 300 400 500

Date: 2004.03.09

of 430 MHz



The Pair to Pair Attenuation toCrosstalk Ratio for all four pairsmeasured from patch panel end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


-20 dB

80 dB650 MHz

0

20

40

60

Recordings of Pair to Pair Atte-nuation to Crosstalk Ratio for allfour pairs from 1 MHz to 650 MHzmeasured from patch panel end.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Power Sum Attenuation toCrosstalk Ratio for all four pairsmeasured from wall outlet end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


-20 dB

80 dB650 MHz

0

20

40

60

Recordings of Power Sum Atte-nuation to Crosstalk Ratio for allfour pairs from 1 MHz to 650 MHzmeasured from wall outlet end.

100 200 300 400 500

Date: 2004.03.09

of 430 MHz



The Power Sum Attenuation toCrosstalk Ratio for all four pairsmeasured from patch panel end com-plies with the specified Class E / Ca-tegory 6 limit in the complete frequ-ency range from 1 MHz to 250 MHz.


-20 dB

80 dB650 MHz

0

20

40

60

Recordings of Power Sum Atte-nuation to Crosstalk Ratio for allfour pairs from 1 MHz to 650 MHzmeasured from patch panel end.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Equal Level Far End Crosstalkfor all six pair combinations withtransmission on the first pair of eachlisted pair combination complieswith the specified Class E / Catego-ry 6 limit in the complete frequencyrange from 1 MHz to 250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Equal Level FarEnd Crosstalk for all six pair com-binations from 1 MHz to 650 MHzwith transmission on the first pairof each listed pair combination.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Equal Level Far End Crosstalkfor all six pair combinations withtransmission on the second pair ofeach listed pair combination com-plies with the specified Class E /Category 6 limit in the complete fre-quency range from 1 MHz to250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Equal Level Far EndCrosstalk for all six pair combi-nations from 1 MHz to 650 MHzwith transmission on the secondpair of each listed pair combi-nation.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Power Sum Equal Level Far EndCrosstalk for all four pairs measuredwith transmission on the listed pairscomplies with the specified Class E /Category 6 limit in the complete fre-quency range from 1 MHz to250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Power Sum EqualLevel Far End Crosstalk for allfour pairs from 1 MHz to 650 MHzwith transmission on the listedpairs.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Power Sum Equal Level Far EndCrosstalk for all four pairs measuredwith receiving on the listed pairscomplies with the specified Class E /Category 6 limit in the complete fre-quency range from 1 MHz to250 MHz.


0 dB

100 dB650 MHz

20

40

60

80

Recordings of Power Sum EqualLevel Far End Crosstalk for allfour pairs from 1 MHz to 650 MHzwith receiving on the listed pairs.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Propagation Delay for all fourpairs complies with the specifiedClass E / Category 6 limit in thecomplete frequency range from1 MHz to 250 MHz.


380 ns

580 ns650 MHz

420

460

500

540

Recordings of Propagation Delayfor all four pairs from 1 MHz to650 MHz.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Delay Skew for all six paircombinations complies with the spe-cified Class E / Category 6 limit inthe complete frequency range from1 MHz to 250 MHz.


0 ns

100 ns650 MHz

20

40

60

80

Recordings of Delay Skew for allsix pair combinations from 1 MHzto 650 MHz.

100 200 300 400 500

Date: 2004.03.10

of 430 MHz



The Longitudinal Conversion Lossfor one of the four pairs measuredfrom wall outlet end violates thespecified Class E / Category 6 limitat most frequencies betweenapprox. 99 MHz and approx.109 MHz.


0 dB

100 dB250 MHz

20

40

60

80

Recordings of Longitudinal Con-version Loss (LCL) for all fourpairs from 1 MHz to 250 MHzmeasured from wall outlet end.

50 100 150 200

Date: 2004.03.10

of 430 MHz



The Longitudinal Conversion Lossfor all four pairs measured frompatch panel end complies with thespecified Class E / Category 6 limitin the complete frequency rangefrom 1 MHz to 250 MHz.


0 dB

100 dB250 MHz

20

40

60

80

Recordings of Longitudinal Con-version Loss (LCL) for all fourpairs from 1 MHz to 250 MHzmeasured from patch panel end.

50 100 150 200

electrical transmission performance testing of … · 2004. 4. 23. · cable and connecting...

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