Automotive Ethernet BroadR-Reach

Transcription

1 Automotive Ethernet BroadR-Reach Agilent PHY Compliance Solutions 1 Last update 2013/07/25 (YS)

2 Agenda BroadR-Reach Overview Transmitter Testing Link Segment Testing 2

3 BroadR-Reach Applications 3

4 Connectivity Comparison Cable Connector (2 ends, on-board and cable) Standard Ethernet BroadR-Reach Reduces connectivity costs up to 80% Reduces cabling weight up to 30% 4

5 Cabling and Signal Communication 100 Mbps symmetrical operation using standard Ethernet PHY components 100 Mbps TX 100 Mbps 100 Mbps TX MAC PHY PHY MAC 100 Mbps RX 100 Mbps Full Duplex 100 Mbps single pair operation achieved 100 Mbps RX Standard IEEE Mbps MAC Interface Only change is to wire-side, MAC-side remains the same Standard IEEE Mbps MAC Interface (Source : Automotive Update, Broadcom, 2012/2) 5

6 OPEN Alliance Members 6

7 Agenda BroadR-Reach Overview Transmitter Testing Link Segment Testing 7

8 Agilent Automotive Applications InfiniiVision Oscilloscopes CAN, LIN, FlexRay triggering and decode CAN Eye-diagram mask testing Infiniium Oscilloscopes CAN, LIN, FlexRay triggering and decode User-definable application (CAN signal quality testing) New compliance apps BroadR-Reach (N6467A) MOST150 and MOST50 (N6466A) Probing N2783L 100 MHz current probe (5m cable) N5450A high-temperature extension cables for InfiniiMax probes N2820/N2821A high-sensitivity current probes 8

9 BroadR-Reach Transmitter Tests Transmitter Output Droop Test o o Positive Droop Test Negative Droop Test Transmitter Timing Jitter o o Slave Jitter Test Master Jitter Test Transient Clock Frequency o o Slave Transient Clock Frequency Master Transient Clock Frequency Transmitter Distortion Test (along with MATLAB) Power Spectral Density Scope FFT Spectral Analyzer Offline Waveform analysis 9

10 BroadR-Reach Compliance Application Setup Menu For power spectrum density measurement use either Agilent Spectrum analyzer or oscilloscope. We setup the Agilent spectrum analyzer for you. We setup the Agilent signal source for you and calibrate it automatically. Fixture correction file can be used for the spectrum analyzer to get the most accurate measurement possible. Used to setup external instruments such as signal sources and spectrum analyzers. 10

11 BroadR-Reach Compliance Application Tabs along the side and top guide the user to the next logical step. Easy to use interface with specific tests categorized by test mode. In this case test modes 1-5. Click on the test to get a clear description and location of spec. The Agilent automated test engine guides you quickly through selecting and configuring tests, setting up the connection, running the tests, and viewing the results. You can easily select individual tests or groups of tests with a mouseclick. 11

12 BroadR-Reach Compliance Application The configure tab allows the user to select different channels and other measurement attributes. For example the signal input can be changed from a differential probe to 2 SMA cables. 12

13 BroadR-Reach Compliance Application When you make multiple tests where the connections must be changed, the software prompts you with connection diagrams. Each connection is clearly identified for the user including additional hardware and cables 13

14 BroadR-Reach Compliance Application Margins and thresholds can be changed to reflect current design model testing. Yellow is marginal while red indicates the spec threshold has been broken. In this case the test has failed because the signal was over the threshold. The Ethernet electrical test software results screen shows a summary of the tests performed, pass/fail status, and margin. Clicking on a specific test also shows the test specification and a measurement waveform, if appropriate. 14

15 BroadR-Reach Compliance Application Additional details are available for each test, including the test limits, test description, and test results, Including waveforms, if appropriate. 15

16 BroadR-Reach Compliance Application In the report we can display screen shots of the device under test to show how the signal passed or failed. In this case we are showing the Droop test measurement. 16

17 BroadR-Reach Fixture MFG by Agilent Technologies Fixture Supports Automotive BroadR-Reach spec 10/100/1000 Ethernet compliance spec Kit Includes: - Fixture -2 Ethernet Cables -Calibration fixture 17

18 Scope Configuration: DSO9104A example Model Number Product Description Qty Oscilloscope DSO9104A or better 1GHz Oscilloscope 1 Application SW DSO9104A option 002 EZJIT Plus ($9000 value, enabled when running app - free) DSO9104A option 003 SDA ($9000 value, enabled when running app - free) N6467A BroadR Reach PHY Compliance application 1 Probing & Connection to DUT* 1130A (*) InfiniiMax I 1.5GHz 1 E2678A (*) Socket Probe Head 1 N5395C (*) Ethernet Test Fixture 1 SMA(m)-SMA(m) Cable * * BroadR Reach specification does NOT define connector spec so probing will vary from user to user. Agilent scope needs D+ and D-. This can be done with SMA or BNC cabling, with a differential probe, or using a test fixture.. 18

19 Configuration Transmitter test Model Number Product Description Qty DSO9104A 1GHz, 20GSa/s, 20Mpoints Oscilloscope 1 N6467A BroadR Reach PHY Conformance Test Software A (*) InfiniiMax I 1.5GHz 1 E2678A (*) Socket Probe Head 1 N5395C (*) Ethernet Test Fixture B (**) USB-GPIB Interface 1 (*) These products are shown as example. BroadR Reach specification does NOT define connector spec, so please discuss with customer about the way of probing. (**) It is needed to control spectrum analyzer from oscilloscope 19

20 Configuration Transmitter test Model Number Product Description Qty N9010A EXA series spectrum analyzer 1 N9010A option 503 9kHz - 3.6GHz 1 N9010A option FSA Fine Step Attenuator N(m)-SMA(f) adapter 1 Balun 1 SMA(m)-SMA(m) Cable (*) 1 (*) These products are shown as example. BroadR Reach specification does NOT define connector spec, so please discuss with customer about the way of probing. 20

21 Ethernet Compliance Applications N8814A 10GBASE-KR Ethernet Backplane Compliance Application Software N8815A 10GBASE-KR 64B/66B Ethernet Backplane Decoder N5392A 10/100/1000BASE-T Ethernet Electrical Performance Validation and Conformance Software N5392B 10/100/1000Base-Te Energy Efficient Ethernet Conformance application U7236A 10GBASE-T Ethernet Electrical Conformance Application 21

22 Ethernet Compliance Applications Cont N6467A BroadR-Reach Compliance Application N5431A XAUI Electrical Validation with 10GBase-CX4, CPRI, OBSAI, and Serial RapidIO Support 22

23 Agenda BroadR-Reach Overview Transmitter Testing Link Segment Testing 23

24 Link Segment Test Overview Category Test Items Cabling System Characteristic Impedance Insertion Loss Return Loss 7.2 Power Sum Near End Crosstalk (PSNEXT) 7.2 Power Sum Equal Level Far End Crosstalk (PSELFEXT) MDI Connectors MDI Characteristic Impedance MDI Return Loss Reference: BroadR-Reach Physical Layer Transceiver Specification For Automotive Applications, V1.2, January 24, 2013, Broadcom Corporation 24

25 Link Segment Test Solution BroadR-Reach link segment testing requires parametric measurements in both time and frequency domains. Frequency Domain Insertion Loss (Sdd21) Traditional Solution Vector Network Analyzer (VNA) New Solution ALL parameters can be measured with ENA Option TDR One-box solution Time Domain Cable Impedance Profile (TDR) TDR Scope 25

26 Link Segment Test Measurement Example 26

27 7.1.1 Characteristic Impedance MDI Characteristic Impedance Multiple reflections from impedance mismatches cause noise at the receiver. Therefore, the impedance profile provides an indication of multiple reflection induced noise. Tdd11 Tdd22 27

28 7.1.2 Insertion Loss Insertion loss is the ratio of transmitted voltage to incident voltage. It has important consequences for rise time degradation and maximum supportable bandwidth. Sdd21 28

29 7.1.3 Return Loss MDI Return Loss Return loss is the ratio of reflected voltage to incident voltage and is a key parameter when evaluating impedance mismatch. When impedance match is poor, transmission signal quality is degraded due to multiple-reflection effects, leading to increase in bit error rate. Sdd11 Sdd22 29

30 7.2 Power Sum Near End Crosstalk (PSNEXT) There is no crosstalk as BroadR-Reach is a one-pair solution. But when multiple cable pairs are bundled, alien crosstalk become interference sources. In order to limit the near end crosstalk noise for a 6-pair bundle UTP cable, the Power Sum NEXT is specified. NEXT1 UTP1 UTP2 NEXT2 UTP6 PSNEXT = NEXT ( ) 30

31 7.2 Power Sum Equal Level Far End Crosstalk (PSELFEXT) There is no crosstalk as BroadR-Reach is a one-pair solution. But when multiple cable pairs are bundled, alien crosstalk become interference sources. In order to limit the far end crosstalk noise for a 6-pair bundle UTP cable, the Power Sum Equal Level FEXT is specified. UTP1 UTP2 FEXT(2) FEXT(1) UTP6 Sdd21 PSELFEXT = ELFEXT( ) where ELFEXT(n) = FEXT(n) - Sdd21 31

32 Agilent BroadR-Reach Link Segment Test Solution ENA Mainframe E5071C-440: 4-port, 9kHz to 4.5GHz, without bias-tees E5071C-445: 4-port, 100kHz to 4.5GHz, with bias-tees Enhanced Time Domain Analysis Option (E5071C-TDR) ECal Module (N4431B) optional Instrument setup files available for download on Agilent.com BroadR-Reach Cable Test Fixtures When using the standard RJ45 connector, Agilent s Ethernet compliance fixture is available. N5395C Available soon!! When using a custom connector, the user needs to build own break-out board to connect to the instrument. 32

33 Summary ENA Option TDR BroadR-Reach Testing Solution is. One-box solution which provides complete characterization (time domain and frequency domain) of the link segment. Similar look-and-feel to traditional TDR scopes, providing simple and intuitive operation even for users unfamiliar to VNAs and S-parameters. 33

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35 BroadR-Reach Pricing and Structure Product Number Description Price N6467A N5435A-062 BroadR-Reach Compliance Application for Infiniium Scopes BroadR-Reach Compliance Application Server Based License DSO/MSO BroadR-Reach Compliance Application Installed for DSO/MSO9000 DSOX BroadR-Reach Compliance Application Installed for DSOX90000 DSO BroadR-Reach Compliance Application Installed for DSO90000 $2,500 $3,750 $2,500 $2,500 $2,500 - Optional N5395C Ethernet Fixture $2555 USD - Note: Requires RJ45 cable from DUT connected to section 1 of fixture. 35

36 Example Setup DSO9104A 1 GHz or better USB Cable from DUT to scope Broadcom DUT Twisted pair cable from DUT to connector board BNC Cables from connector board to scope 36

37 Configuration - Cable Model Number Product Description Qty E5071C ENA Series Network Analyzer 1 E5071C option 440 9kHz-4.5GHz 4port S parameter Test set 1 E5071C option TDR Enhanced time domain analysis N(m)-SMA(f) adapter 4 N4431B 4 ports Ecal 9kHz-13.5GHz 1 N4431B option x 3.5mm (f) connectors 1 Fixuture (***) 1 Cables (***) (***) BroadR Reach specification does NOT define connector spec, so please discuss with customer about the way to acquire signal to ENA. 37