IEEE-100GBASE-KR4/CR4, v3

Transcription

1 COMPLIANCE STATEMENT 1. Specification IEEE-100GBASE-KR4/CR4, v3 Specification Title: Standard Body: Standard Name: Specification Owner: Warning Margin: IEEE GBASE-KR4/CR4 IEEE 100GBASE-KR4, 100GBASE-CR4 JitterLabs A test result having margin 75.0% is marked "Marginal Pass." 2. Compliance Summary Ch Report Name Report Label Freq (Hz) Vsupply (V) Pass/Fail 1 CG DEMO-133A, MHz Fail 2 CG DEMO-156A, MHz Marginal Pass 3 CG DEMO-156B, MHz Pass This statement was auto-generated by request of Gary Giust at JitterLabs. June 28, GBASE-KR4-CR4.pdf

2 3. Devices Ch Product Family Manufacturer Test Report Owner 1 DEMO-133A Demo Devices Demo Devices 2 DEMO-156A Demo Devices Demo Devices 3 DEMO-156B Demo Devices Demo Devices 4. Test Summary The table below presents a margin analysis, where the values shown indicate passing margin. A test is considered to Pass when this margin is greater than the Warning Margin (e.g. 75.0%). Report Label Key: Ch 1 = DEMO-133A, MHz, Ch 2 = DEMO-156A, MHz, Ch 3 = DEMO-156B, MHz # Test Name Unit Ch 1 Ch 2 Ch 3 T1 Effective RJ at BER=1e-5 % T2 Effective BUJ % T3 Uncorrelated TJ at BER=1e-5 % T4 Frequency Accuracy % Test Data Report Label Key: Ch 1 = DEMO-133A, MHz, Ch 2 = DEMO-156A, MHz, Ch 3 = DEMO-156B, MHz Ch Spec Lower Limit Measured Value Spec Upper Limit Margin Pass/Fail Test T1: Effective RJ at BER=1e-5 Time-interval Error (TIE) parameter: RJ (pp) TIE analysis: jitter filter, non-telecom, bps, 1.000e-5 BER, CF, DTD, yes dist. split mui pp 80.0 mui pp 0 % Fail mui pp 80.0 mui pp 37.9 % Marginal Pass mui pp 80.0 mui pp 78.0 % Pass Test T2: Effective BUJ Time-interval Error (TIE) parameter: DJδδ Range (pp) (Rising, Falling Edges) TIE analysis: jitter filter, non-telecom, bps, 1.000e-5 BER, CF, DTD, yes dist. split RISING EDGES mui pp 100 mui pp 18.2 % Marginal Pass mui pp 100 mui pp 60.7 % Marginal Pass mui pp 100 mui pp 88.8 % Pass FALLING EDGES mui pp 100 mui pp 0 % Fail mui pp 100 mui pp 59.6 % Marginal Pass mui pp 100 mui pp 89.5 % Pass JitterLabs page 2 of 6 Compliance Statement

3 Report Label Key: Ch 1 = DEMO-133A, MHz, Ch 2 = DEMO-156A, MHz, Ch 3 = DEMO-156B, MHz Ch Spec Lower Limit Measured Value Spec Upper Limit Margin Pass/Fail Test T3: Uncorrelated TJ at BER=1e-5 Time-interval Error (TIE) parameter: TJ Range (pp) (Rising, Falling Edges) TIE analysis: jitter filter, non-telecom, bps, 1.000e-5 BER, CF, DTD, yes dist. split RISING EDGES mui pp 180 mui pp 0 % Fail mui pp 180 mui pp 50.5 % Marginal Pass mui pp 180 mui pp 87.3 % Pass FALLING EDGES mui pp 180 mui pp 0 % Fail mui pp 180 mui pp 49.9 % Marginal Pass mui pp 180 mui pp 86.2 % Pass Test T4: Frequency Accuracy Freq@Vsupply parameter: Freq@Vsupply PPM Max 1 8 PPM pk 100 PPM pk 92.5 % Pass 2 12 PPM pk 100 PPM pk 88.4 % Pass 3 8 PPM pk 100 PPM pk 92.4 % Pass 6. Jitter Filter Diagram Embedded Clock This is an example block diagram for the jitter filter used by this specification. Note that other block diagrams are also possible, and that the real application may appear different than shown here. Consult the owner of this specification for more information. JitterLabs page 3 of 6 Compliance Statement

4 7. Jitter Filter Equation The following tests use this jitter filter: T1, T2, T3. 0 System Transfer Function - 25 Gain (db) Gain (db) E0 1E1 1E2 1E3 1E4 1E5 1E6 1E7 1E8 1E9 Frequency (Hz) Block Transfer Functions H1 H E0 1E1 1E2 1E3 1E4 1E5 1E6 1E7 1E8 1E9 Frequency (Hz) System Transfer Function: H1 is defined by user, with name: Generic first order LPF H1 Block Transfer Function: H2 Block Transfer Function: ωc/(2π) = Hz ωc/(2π) = Hz JitterLabs page 4 of 6 Compliance Statement

5 8. Specification Description STANDARD BODY The Institute of Electrical and Electronics Engineers (IEEE) is an international non-profit professional organization for advancing technologies related to electricity. IEEE is a collection of IEEE standards for information technology that govern the exchange of information mainly between systems in local area networks (LANs) and metropolitan area networks (MANs), with some support for wide area networks (WANs). STANDARD DOCUMENT IEEE 802.3bj Clause 92 defines the functional and electrical characteristics of a type 100GBASE-CR4 twin-ax copper cabling Ethernet technology [1]. It uses 4 lanes of shielded balanced copper cabling up to 5 meters in length. The goal is to increase bandwidth and lower cost for intra-rack and inter-rack connections between servers in data centers. IEEE 802.3bj Clause 93 defines the functional and electrical characteristics of a type 100GBASE-KR4 backplane Ethernet technology [1]. A backplane can be viewed as a communication highway connecting two printed circuit boards. The development of backplane Ethernet was spurred by the growing interest in blade server and router/switch applications based on upgradable line cards that plug in and out of a backplane. IEEE BASE-K technology specifies serial-data transmission over two differential and controlled-impedance traces up to approximately 1 meter of an electrical backplane including two connectors. Key features: 4 lanes of traffic, each operating at Gbps +/- 100 ppm; embedded clock; 64b/66b encoding; transmit pre-equalization; receive equalization; autonegotiation; link training; optional Reed Solomon FEC (clause 91). TEST PLAN T1 [2,3]: Effective RJ at BER=1e-5 < 0.08 UIpp T2 [2]: Effective BUJ < 0.1 UIpp T3 [2]: Effective uncorrelated TJ at BER=1e-5 < 0.18 UIpp T4 [6]: Frequency accuracy +/- 100 ppm Serial-data parameters: Gbps data rate [2]; 1e-5 BER [2]; crest factor [2]; a single-pole high-pass receive jitter filter with a 3 db corner frequency at 10 MHz [5]. NOTES A. This specification assumes only rising (or only falling) edges of the clock are used to time data onto a channel, which is reflected in the tests. Therefore, the clock contributes no even-odd jitter [4] to the serial data, and is not tested here. B. Since 100GBASE-KR4/CR4 only defines the receive (not the transmit) PLL bandwidth [5], this specification defers the definition of block transfer function H1 to the user. We recommend the user contact the manufacturer of the serial transmitter to obtain an appropriate filter for H1 that the user can enter when applying this specification [7]. JitterLabs page 5 of 6 Compliance Statement

6 C. The Test Plan limits set for this specification (as derived from IEEE 802.3bj) are for serial data. To adapt them for reference clocks, the Warning Margin is set to 75%. If a different margin is desired, you may copy this specification and modify it as needed. [1] IEEE 802.3bj, Clauses 92 and 93. [2] IEEE 802.3bj, subclauses and [3] As defined in IEEE 802.3bj subclause , effective RJ is computed from equations and and the specified limits for jitter. [4] IEEE 802.3bj, subclause [5] IEEE 802.3bj/D3.2 (April 11, 2014) page 206. [6] IEEE 802.3bj, subclause [7] See related discussion in the Specifications chapter of the JitterLabs GUIDE-2 documentation. 9. About This Document A Test Report is a comprehensive set of measurement data characterizing a clock signal output by a device. Test Reports are accessed using the JitterLabs app, which is an enterprise-level application that runs in a web browser. The application lets users access, interact with, compare, and share Test Reports. It also includes an analysis engine to evaluate Test Reports to specifications entered (and optionally shared) by its community of users. Each specification includes a Test Plan that specifies limits on one or more measurement metrics in a Test Report. A Compliance Statement is created when a user applies a selected specification to one or more selected Test Reports. The application's analysis engine then evaluates the Test Reports according to the specification's Test Plan. This process results in a status of Incomplete, Marginal Pass, Pass, or Fail for each test in the Test Plan, as well as overall for all tests in the Test Plan. A status of Incomplete indicates one or more tests could not be performed due to insufficient or missing data. Marginal Pass indicates a passing status with a passing margin less than the Warning Margin defined by the specification. A Pass status indicates passing with a passing margin greater than the Warning Margin. Lastly, a Fail status indicates failing with no (e.g. 0%) passing margin. JitterLabs page 6 of 6 Compliance Statement