1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 15, 20151UL 4000Outline of Investigation for High Speed CablesIssue Number: 1July 15, 2015Summary of TopicsThis first issue of the Outline of Investigation for High Speed Cables, UL4000, cov
2、ers the transmission performance evaluation of high speedcables.ULs Outlines of Investigation are copyrighted by UL. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regard
3、ingthose Outlines of Investigation shall remain the sole and exclusive property of UL.COPYRIGHT 2015 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULJULY 15, 2015UL 40002No Text on This PageUL COPYRIGHTED MATERIAL
4、 NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .42 References .43 Units of Measurement .44 Definitions 45 Construction 4PERFORMANCE6 High Speed Cable Assembly Physical Layer Electrical Characteristics .57 Skew 67.1 General .67.2 Apparatu
5、s .67.3 Preparation of DUT .67.4 Maximum cable assembly intra-pair skew .67.5 Maximum cable assembly inter-pair skew .78 Differential Output Eye Mask .78.1 General .78.2 Apparatus .88.3 Preparation of DUT .98.4 Procedure .99 Insertion loss 109.1 General 109.2 Differential insertion loss .109.3 Diffe
6、rential insertion loss deviations 129.4 Inter-pair differential insertion loss deviations .1510 Differential Input Return Loss 1710.1 General .1710.2 Apparatus .1710.3 Preparation of DUT .1710.4 Procedure .1810.5 Results .1811 Far-end Crosstalk .1812 Differential Impedance .19MANUFACTURING AND PRODU
7、CTION TESTS13 Continuity Test .19MARKINGS14 General 19JULY 15, 2015 UL 4000 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 This outline of investigation describes the requirements used to evaluate the transmissionperfo
8、rmance of high speed cables.2 References2.1 Any undated reference to a code or standard appearing in the requirements of this outline shall beinterpreted as referring to the latest edition of that code or standard.3 Units of Measurement3.1 The unit of measure shall be SI. If a value for measurement
9、is followed by a value in other units inparentheses, the second value represents a direct conversion or an alternative value.4 Definitions4.1 For the purpose of this Outline, the following definitions apply.4.2 DUT Device Under Test.4.3 TMDS Transmission Minimized Differential Signaling.4.4 CROSSTAL
10、K A measure of the unwanted signal coupling from one pair into another pair.4.5 INSERTION LOSS The signal loss resulting from the insertion of a component, or link, or channel,between a transmitter and receiver (often referred to as attenuation).5 Construction5.1 The length of a cable assembly shall
11、 be within +/- 10% of the marked length when measured fromthe face of one connector to the face of the connector at the far end of the cable.5.2 High-speed cable assemblies may be required to comply with specifications applicable to theirparticular configuration and use. Other national, internationa
12、l or private performance specifications,applicable to high-speed cables may also be used to evaluate high speed cables as described in particularcertification programs.JULY 15, 2015UL 40004UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFOR
13、MANCE6 High Speed Cable Assembly Physical Layer Electrical Characteristics6.1 The measurements shown in Table 6.1 are to be made on high-speed audio/video cable assemblies.Table 6.1High-speed audio/video cable assembly electrical characteristicsTest Section ReferenceMaximum Cable Assembly Intra-Pair
14、 Skew 7.4Maximum Cable Assembly Inter-Pair Skew 7.5Differential Output Eye Mask 8Differential Insertion Loss 9.2Differential Insertion Loss Deviations (ILD) 9.3Inter-pair Differential ILD 9.4Differential Input Return Loss 10Far-end Crosstalk 11Differential Impedance 126.2 Unless specified otherwise
15、within the parameters respective subsection, all tests defined in Table 6.1are to be measured over a frequency range of N uniformly-spaced frequencies from start frequency fminto stop frequency fmaxwith step size no larger than f. Where fmin, fmaxand f are defined in Table 6.2.Table 6.2Frequency val
16、uesParameterBit Rate3.4 Gbps 6 Gbpsfmin1 MHzfmax3400 MHz 6000 MHzf 10 MHzNote: The bit rates or data rates of high-speed audio/video cables are often referred to by the total rate for three channels. Forexample, 10.2 Gbps (3 X 3.4 Gbps) and 18 Gbps (3 X 6 Gbps).JULY 15, 2015 UL 4000 5UL COPYRIGHTED
17、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL7 Skew7.1 General7.1.1 This section defines the Intra-Pair and Inter-Pair skew for a high speed cable assembly. Table 7.1defines the maximum skew values for assemblies that support a TMDS bit rate up to 3.4 Gbp
18、s and 6Gbps. Both the intra-pair and inter-pair skew is to be measured on the CLOCK, DATA0, DATA1, andDATA2 differential channels of the cable assembly.7.2 Apparatus7.2.1 The apparatus shall consist of a Time Domain Reflectometer (TDR) and two Module/CableCompliance Boards.7.3 Preparation of DUT7.3.
19、1 The DUT shall be stored in an area that is under lab conditions prior to the test.7.4 Maximum cable assembly intra-pair skew7.4.1 General7.4.1.1 The intra-pair skew is defined as the absolute difference between the propagation delay of thepositive and negative polarity wire within the same differe
20、ntial lanes. The intra-pair skew shall be less thanthe values specified in Table 7.1.7.4.2 Procedure7.4.2.1 The TDR is calibrated from -2ns to 10ns using electronic calibration.7.4.2.2 The DUT is connected to the TDR via two module compliance boards and all unused lanes areterminated to a 50 ohm loa
21、d.7.4.2.3 A single-ended impedance vs. time measurement of the CLK channel is made for both thepositive (+) and negative (-) polarity.7.4.2.4 This process is then repeated for each of the other signaling channels.JULY 15, 2015UL 40006UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR
22、DISTRIBUTION WITHOUT PERMISSION FROM UL7.5 Maximum cable assembly inter-pair skew7.5.1 General7.5.1.1 The inter-pair skew is defined as the absolute difference between the propagation delay of anytwo differential lanes within a cable assembly. The inter-pair skew shall be less than the values specif
23、iedin Table 7.1.7.5.2 Procedure7.5.2.1 The TDR is calibrated from -2ns to 10ns using electronic calibration.7.5.2.2 The DUT is connected to the TDR via two module compliance boards and all unused lanes areterminated to a 50 ohm load.7.5.2.3 A differential impedance vs. time measurement of the CLK ch
24、annel is made.7.5.2.4 This process is then repeated for each of the other signaling channels.Table 7.1Maximum cable assembly skewParameter TMDS Bit Rate3.4 Gbps 6 GbpsMaximum Intra-Pair Skew 150 psec 110 psecMaximum Inter-Pair Skew 2.4 psec 1.75 psec8 Differential Output Eye Mask8.1 General8.1.1 Thi
25、s test establishes the method to verify that a worst case source signal meets the worst case synceye diagram after passing through a cable channel. The differential output eye mask measured at eachdifferential channel shall not exceed a maximum hit ratio of5x10-5while operating at a TMDS bit rate of
26、3.4 Gbps or 6 Gbps. See Figure 8.1 and Table 8.1 for the eye mask values.This is generated text for figtxt.JULY 15, 2015 UL 4000 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 8.1Eye mask valuesSymbol Value UnitsY1 79.5 mVY2 780 mVX1 0
27、.235 Unit Intervals (UI)8.2 Apparatus8.2.1 The apparatus shall consist of a Vector Network Analyzer (VNA), a Digital Storage Oscilloscope(DSO), an Arbitrary Waveform Generator (AWG), an Arbitrary Function Generator (AFG) and twoModule/Cable Compliance Boards.Figure 8.1Differential output eye maskJUL
28、Y 15, 2015UL 40008UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8.3 Preparation of DUT8.3.1 The DUT shall be stored in an area that is under lab conditions prior to the test and connected asshown in Figure 8.2.This is generated text for figt
29、xt.8.4 Procedure8.4.1 The Arbitrary Waveform Generators (AWGs) and Arbitrary Function Generator (AFG) are set toclock synchronization mode and a maximum color depth 4K pattern is loaded on the 4 channels.8.4.2 The DUT is connected to the Oscilloscope (DSO) via two module compliance boards and all un
30、usedlanes are terminated to a 50 Ohm load as shown in Figure 8.2.8.4.3 After the device is connected as described, the eye diagram of the CLK signal is measured andrecorded.8.4.4 The steps described in 8.4.1 8.4.3 are repeated for each of the other signaling channels.Figure 8.2Eye mask compliance se
31、t-upJULY 15, 2015 UL 4000 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9 Insertion loss9.1 General9.1.1 This section defines several parameters related to the attenuation of the cable assembly. Each ofthe following attenuation assembly par
32、ameters are to be measured on the CLOCK, DATA0, DATA1, andDATA2 differential channels of the assembly.Note: In some documentation the term attenuation is commonly used to describe the differentialattenuation of frequency domain content as it propagates through a cable assembly and measured in dB.Thi
33、s is also commonly referred to as insertion loss. Insertion loss will be used throughout thisdocument.9.2 Differential insertion loss9.2.1 General9.2.1.1 This test establishes the method to verify that all high speed signaling channels meet theminimum Insertion Loss requirements. The insertion loss,
34、 in dB, of each differential channel shall be lessthan the limit values defined in Table 9.1. The differential insertion loss limit is shown in Figure 9.29.2.2 Apparatus9.2.2.1 The apparatus shall consist of a Vector Network Analyzer (VNA) and two Module/CableCompliance Boards as previously describe
35、d.9.2.3 Preparation of DUT9.2.3.1 The DUT shall be connected as shown in Figure 9.1.This is generated text for figtxt.JULY 15, 2015UL 400010UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.2.4 Procedure9.2.4.1 The Vector Network Analyzer (VNA
36、) is calibrated from 10MHz to 6.0GHz in 10MHz steps usingelectronic calibration.9.2.4.2 The DUT is connected to the VNA via two module compliance boards and all unused lanes areterminated to a 50 Ohm load.9.2.4.3 An S-parameter measurement of the CLK channel is made.9.2.4.4 This process is then repe
37、ated for each of the other signaling channels.This is generated text for figtxt.Figure 9.1Analyzer test setupJULY 15, 2015 UL 4000 11UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULTable 9.1Example insertion loss data pointsFrequency (MHz) Val
38、ue (max) dB15825 52475 124126 205100 256000 29.6Note: This table is for reference only. These discrete values are only for formula cross referencing only.Use swept frequency for limit calculation.9.3 Differential insertion loss deviations9.3.1 General9.3.1.1 This test establishes the method to verif
39、y that all high speed signaling channels meet theminimum Insertion Loss Deviations requirement. The insertion loss deviation ILD(f), in dB, of eachdifferential channel shall meet the limit values defined in the following equations, where f is the frequencyvalues defined in Table 6.2, in MHz. The ILD
40、(f) limit is shown in Figure 9.4.ILD(f) ILDmin(f) = -1.0 - 0.5 x 10-3xfFigure 9.2Differential insertion lossJULY 15, 2015UL 400012UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULILD(f) ILDmax(f)=1.0+0.5x10-3xf9.3.2 Apparatus9.3.2.1 The apparat
41、us shall consist of a Vector Network Analyzer (VNA) and two Module/CableCompliance Boards.9.3.3 Preparation of DUT9.3.3.1 The DUT shall be connected as shown in Figure 9.3This is generated text for figtxt.9.3.4 Procedure9.3.4.1 S-parameters for the CLK channel obtained in the test described in Secti
42、on 9.2.4 are loaded.9.3.4.2 The fitted insertion loss is calculated and the ILD is derived for that channel.9.3.4.3 This process is then repeated for each of the other signaling channels.Figure 9.3Analyzer test setupJULY 15, 2015 UL 4000 13UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
43、ION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.3.5 Results and calculations9.3.5.1 The insertion loss deviation of each channel of the DUT shall be recorded.9.3.5.2 The insertion loss deviation ILD(f) is the difference between the measured insertion loss IL(f) andthe fitted insertion loss ILfitted(f
44、) as shown in the following equation, where ILfitted(f) is defined in 9.3.5.3.ILD(f) = IL(f) - ILfitted(f)9.3.5.3 The fitted insertion loss as a function of frequency is given by the following equation. Thecoefficients (a0,a1,a2,a4) for the fitted insertion loss shall be calculated in Section 9.3.5.
45、4.ILfitted(f)=a0+a1xf+a2xf+a4xf29.3.5.4 The weighted frequency matrix F is defined using the following equation.F=10-IL(f1)/20f1x10-IL(f1)/20f1x10-IL(f1)/20f12x10-IL(f1)/2010-IL(f2)/20f1x10-IL(f2)/20f1x10-IL(f2)/20f12x10-IL(f2)/2010-IL(fn)/20f1x10-IL(fn)/20f1x10-IL(fn)/20f12x10-IL(fn)/209.3.5.5 The
46、weighted insertion loss vector L is defined using the following equation.L=IL(f1)x10-IL(f1)/20IL(f1)x10-IL(f2)/20IL(f1)x10-IL(fn)/209.3.5.6 The fitted insertion loss coefficients are then given by the following equation.JULY 15, 2015UL 400014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
47、CTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULa0=(FTF)-1FTLa1a2a4This is generated text for figtxt.9.4 Inter-pair differential insertion loss deviations9.4.1 General9.4.1.1 This test establishes the method to verify that the maximum Inter-pair Insertion Loss Deviationsis below the requirement. The
48、inter-pair insertion loss deviation (ILD) is defined as the absolute differencebetween the insertion loss deviation of any two differential lanes within a cable assembly. The inter-pairILD shall be less than 3 dB for the frequency range.Figure 9.4Differential insertion loss deviationJULY 15, 2015 UL
49、 4000 15UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL9.4.2 Apparatus9.4.2.1 The apparatus shall consist of a Vector Network Analyzer (VNA) and two Module/CableCompliance Boards as previously described.9.4.3 Preparation of DUT9.4.3.1 The DUT shall be connected as shown in Figure 9.5.This is generated text for figtxt.9.4.4 Procedure9.4.4.1 S-parameters for the all channels obtained in the test described in Section 9.2.4 are loaded.9.4.4.2 The maximum Inter-pair difference is calc
