SIGLENT TECHNOLOGIES SDS7000A User Manual
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SIGLENT TECHNOLOGIES SDS7000A User Manual

100 base-tx ethernet compliance test application
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100 BASE-TX Ethernet Compliance
Test Application
User Manual
EN01A

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Summary of Contents for SIGLENT TECHNOLOGIES SDS7000A

  • Page 1 100 BASE-TX Ethernet Compliance Test Application User Manual EN01A...

  • Page 3: Table Of Contents

    100 BASE-TX Ethernet Compliance Test Application User Manual Contents Introduction ......................1 Test Items and Standards Reference ............... 2 Test Items ........................2 Standards Reference ...................... 3 Test equipment ....................4 Required Equipment ....................... 4 Delivery Checklist ......................5 Introduction to FX-ETH Test Fixture ................6 Compliance Test Software ................
  • Page 4 100 BASE-TX Ethernet Compliance Test Application User Manual Rise and Fall Time Tests ....................31 6.4.1 Test procedure ...................... 31 6.4.2 Algorithm ......................32 6.4.3 Test Results Reference ..................32 Duty Cycle Distortion Tests................... 33 6.5.1 Test procedure ...................... 33 6.5.2 Algorithm ......................

  • Page 5: Introduction

    Siglent provides 100 BASE-TX and 1000 BASE-T Ethernet Compliance Test application to verify the Ethernet transmitter device under test (DUT) compliance to specifications. The equipment required for Ethernet conformance testing including Siglent SDS7000A oscilloscope, Vector Network Analyzers, test fixture, probes, Arbitrary Waveform Generator and Ethernet Compliance Test Application software.

  • Page 6: Test Items And Standards Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual Test Items and Standards Reference 2.1 Test Items Siglent's SDS7000A Oscilloscope and Ethernet Compliance Test Fixture supports the following 100 BASE-TX Ethernet Electrical Compliance Test items:  Template Tests  Amplitude Domain ...

  • Page 7: Standards Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual 2.2 Standards Reference Siglent provides the 100 BASE-TX Ethernet Compliance Test solution which follows the IEEE802.3u and ANSI X3.263-1995 standards, and Table 2-1 shows the standard for every test item. More information for the IEEE802.3 standard, please go to the website: www.ieee802.org. Table 2-1 100 BASE-TX Test by Standard Reference Standard Reference Description...

  • Page 8: Test Equipment

    The Ethernet electrical compliance test measurements require the following equipment:  Oscilloscope (SDS7000A): Oscilloscope’s bandwidth larger than 2GHz, and with the Ethernet Compliance Test Application software that has installed the option key (SDS7000A-CT- 100BASE-T option for 100 BASE-TX, SDS7000A-CT-1000BASE-T option for 1000BASE-T).

  • Page 9: Delivery Checklist

    100 BASE-TX Ethernet Compliance Test Application User Manual 3.2 Delivery Checklist The FX-ETH kit includes the items listed in Table 3-1. When you receive the FX-ETH, firstly, verify that all items listed on the checklist have been received. If you notice any omissions or damage, please contact your nearest Siglent customer service center or distributor as soon as possible.

  • Page 10: Introduction To Fx-Eth Test Fixture

    Section 4: Supports Test Mode 1 and Test Mode 4 on 1000Base-T compliance tests with disturbing signals. Section 5: Under 100 BASE-TX compliance tests, the Link Partner such as the SDS7000A oscilloscope transmits at 100Mbps. The DUT transmitter should then emit the following waveform to support the compliance tests.

  • Page 11: Compliance Test Software

    SDS7000A provides 100 BASE-TX Compliance Test function, according to Analysis -> Compliance Test -> Protocol Type , select 100 BASE-TX and click ON to activate the Compliance Test function, which are shown in Figure 4-1.

  • Page 12: Test Configuration

    In " Link Partner Select ", select the Link Partner device to obtain the scrambled / idle / sequence for 100 BASE-TX tests. You can either select Use Other Devices SDS7000A Series Scope as the Link Partner. Figure 4-2 Test Configuration Window ...
  • Page 13 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 4-3 Test Item Selection Window  Configure: The test items selected in Test Select will be highlighted in this column, and you can click the corresponding items to configure. You can set the input channels and probe type, as shown in Figure 4-4.
  • Page 14 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 4-5 Pulse Width of the DUT  Connect: This column displays the connection diagram of the compliance test, as shown in Figure 4-6. If more than one item is selected simultaneous, only the connection diagram for the first test item will be displayed.
  • Page 15 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 4-7 Run Test Window In the following test process, according to the pop-up window prompts to complete the test. After all test items are completed, the test result window will pop up. i n t .

  • Page 16: Viewing Of Results

    100 BASE-TX Ethernet Compliance Test Application User Manual 4.2 Viewing of Results Click " Result " to view the corresponding test results. The upper half of the test results window contains the test items, outlining the results of every test item, as well as the pass thresholds, as shown in Figure 4-8.

  • Page 17: Report Generation

    100 BASE-TX Ethernet Compliance Test Application User Manual 4.3 Report Generation Click Report Setting , fill in the test information, and select the HTML or XML report type. Preview Report can view the generated report in advance. Click File Management to select the path to save.
  • Page 18 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 4-11 Test Report i n t . s i g l e n t . c o m...

  • Page 19: 100 Base-Tx Test Environment And Connectivity

    If you are using another 100 BASE-TX device (Link Partner) for the test pattern generation, then the SDS7000A Oscilloscope can act as a Link Partner. If your device does not require a link partner, please see “5.1 Probing for 100 BASE-TX Tests, Without Link Partner”.

  • Page 20: Use A Differential Probe To Probe Signal

    100 BASE-TX Ethernet Compliance Test Application User Manual 50Ω 50Ω 50Ω 50Ω 50Ω 50Ω 50ΩTerminator 50Ω SMA Cable UTP Cable Figure 5-1 Connectivity for 100 BASE-TX Tests with SMA Cables, Without Link Partner 5.1.2 Use a Differential Probe to Probe Signal Connectivity by using a differential probe for 100 BASE-TX tests is shown as Figure 5-2.
  • Page 21 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 5-2 Probing for 100 BASE-TX Compliance Tests with a Differential Probe, Without Link Partner i n t . s i g l e n t . c o m...

  • Page 22: Probing For 100 Base-Tx Tests, With Link Partner

    In the SDS7000A Ethernet Compliance Test software, in order to facilitate the user to configure the DUT to send out scrambled, MLT-3 encoded / idle / code-groups, the user can set the SDS7000A oscilloscope as the Link Partner, and connect the lower ethernet port on the SDS7000A oscilloscope to the DUT.

  • Page 23: Use Sma Cables To Probe Signal

    Connect the DUT to the J32 connector on section ⑤ of the test fixture by using a short UTP cable. Connect the lower LAN port on the SDS7000A Scope to the J31 connector (marked Link Partner) on the section ⑤ of the test fixture by using another UTP cable.

  • Page 24: Use A Differential Probe To Probe Signal

    Connect the DUT to the J32 connector on section ⑤ of the test fixture by using a short UTP cable. Connect the lower LAN port on the SDS7000A Scope to the J31 connector (marked Link Partner) on the section ⑤ of the test fixture by using another UTP cable.
  • Page 25 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 5-6 Use SDS7000A Scope as the Link Partner, with a Differential Probe Connection i n t . s i g l e n t . c o m...

  • Page 26: Test Procedure And Test Results For Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual Test procedure and test results for reference 6.1 Template Tests Twisted pair Active Output Interface template testing helps user to understand potential signal quality issues and verify whether the transmitter signal meets the requirements for various items such as jitter, overshoot, rise time, and fall time in the IEEE standard.

  • Page 27: Algorithm

    100 BASE-TX Ethernet Compliance Test Application User Manual During the test, the oscilloscope will automatically verify the correct test signal is present on the configured DUT “Source” channel and configure the correct trigger level to capture the signal. After finishing all the tests will output the test results. 6.1.2 Algorithm The ANSI X3.263-1995 specification does not require this test.
  • Page 28 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-3 Details of the Template Test Waveform i n t . s i g l e n t . c o m...

  • Page 29: Peak Voltage Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.2 Peak Voltage Tests The peak voltage tests are including the differential output voltage tests and the signal amplitude symmetry test.  Differential output voltage: The +/- Vout differential output voltage tests are used to verify whether the differential output voltage of the device under test(DUT) are within the compliance limits by measuring the average amplitude of the positive and negative pulses of the UTP AOI output waveforms.

  • Page 30: Test Results Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual waveforms with 14bit (112ns) pulse width. Siglent's Ethernet Compliance Software supports acquiring waveforms with 80ns and 96ns pulse widths. The differential output voltage (positive pulse width) is measured when the +Vout signal shifts from 0V to +Vout, this time range extends from 8 ns after the signal rise crosses 50% of +Vout to 8 ns before the signal fall crosses 50% of +Vout, calculate the mean voltage over this range, and the test waveforms are shown in Figure 6-4.
  • Page 31 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-5 Peak Voltage Test Results Figure 6-6 Details for Peak Voltage Test Waveform i n t . s i g l e n t . c o m...

  • Page 32: Overshoot Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.3 Overshoot Tests The UTP +/-Vout Differential Output Voltage tests are to verify that the waveform overshoot of the device under test (DUT) is within the conformance limits. 6.3.1 Test procedure Select Overshoot (ANSI X3.263-1995,9.1.3) in Test Select label. Configure the DUT for 100 BASE-TX operation.

  • Page 33: Test Results Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-7 Waveform Overshoot Reference Waveform 6.3.3 Test Results Reference The overshoot (rise edge and fall edges of the pulse) of the transmitter output signal must not exceed The overshoot test result reference is shown in Figure 6-8 and the waveform details is shown in Figure 6-9.
  • Page 34 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-9 Details for Overshoot Test Waveform i n t . s i g l e n t . c o m...

  • Page 35: Rise And Fall Time Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.4 Rise and Fall Time Tests For the 100 BASE-TX rise and fall time tests, the rise time and fall time measurements for positive and negative pulse widths, as well as symmetry calculations, are included as follows: ...

  • Page 36: Algorithm

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.4.2 Algorithm According to the section 9.1.6 of ANSI X3.263-1995 standard, the rise time and fall time of the transmitter output signals (10% to 90%, positive edge and negative edge) should all be within the conformance limits(3ns to 5ns), and the distribution of all measured results of rise and fall time should be less than 0.5 ns.

  • Page 37: Duty Cycle Distortion Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.5 Duty Cycle Distortion Tests The 100 BASE-TX duty cycle distortion test requires that the peak-to-peak duty cycle distortion of the transmitter’s output signal should be within the compliance limits. 6.5.1 Test procedure Select Duty Cycle Distortion (ANSI X3.263-1995,9.1.8) in Test Select label.

  • Page 38: Test Results Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual  T3 = t4 – t3 - 16ns  T4 = t3 –t1 - 32ns  T5 = t4 –t2 - 32ns  T6 = t4 – t1 - 48ns Peak-to-peak duty cycle distortion equals to the absolute value of maximum (T1, T2, T3, T4, T5, T6). The standard requires maximum peak-to-peak duty cycle distortion should be less than 500ps.

  • Page 39: Jitter Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.6 Jitter Tests The 100 BASE-TX Transmit Jitter test ensures that the total transmit jitter of the signal at the Active Output Interface (AOI) is within conformance limits, which is specified in section 9.1.9 of ANSI X3.263- 1995 standard.

  • Page 40: Test Results Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.6.3 Test results reference The test results of peak-to-peak jitter are shown in Figure 6-15 and Figure 6-16. Figure 6-15 Peak-to-Peak Jitter Test Results Figure 6-16 Details for Peak-to-Peak Jitter Test Waveform i n t .

  • Page 41: Transmitter Return Loss Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.7 Transmitter Return Loss Tests MDI return loss tests for 100 BASE-TX transmitter is performed according to Subclause 9.1.5 of ANSI X3.263-1995, which describes the 100 BASE-TX transmitter return loss test specification. A VNA is required to perform the return loss test, which involves the steps for VNA calibration before testing return loss.

  • Page 42: Test Procedure

    100 BASE-TX Ethernet Compliance Test Application User Manual The calibration environment for the VNA is shown in Figure 6-17. Figure 6-17 VNA Calibration Environment 6.7.2 Test procedure The test procedure is as follows: Configure the DUT for 100 BASE-TX operation. Ensure that the DUT is sending scrambled, MLT- 3 encoded / idle / code-groups (this is a 3-level pseudo-random bit sequence).

  • Page 43: Algorithm

    100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-18 Transmitter Return Loss Test Environment 6.7.3 Algorithm Subclause 9.1.5 of ANSI X3.263-1995 standard describes return loss specifications for 100 BASE- TX devices physical medium attachment (PMA). The UTP and STP AOI interface shall be implemented such that the following return loss characteristics are satisfied for each of the specified line impedances: ...

  • Page 44: Test Results Reference

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.7.4 Test results reference The transmitter return loss tests are shown in Figure 6-19 and Figure 6-20. Figure 6-19 Transmitter Return Loss Test Results Figure 6-20 Details for Transmitter Return Loss Waveform i n t .

  • Page 45: Receiver Return Loss Tests

    100 BASE-TX Ethernet Compliance Test Application User Manual 6.8 Receiver Return Loss Tests This section describes the 100 BASE-TX Receiver Return Loss test according to ANSI X3.263-1995, Subclause 9.2.2. The test procedures described in this section cover the Receiver Return Loss measurement required by the specification.

  • Page 46: Test Procedure

    100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-21 VNA Calibration Environment for Receiver 6.8.2 Test Procedure The test procedure for receiver is as follows: The DUT for 100 BASE-TX operation does not require any particular configuration. Simply turn on the DUT and set the DUT to operate in 100 BASE-TX to perform the test.

  • Page 47: Algorithm

    100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-22 Receiver return loss test connection 6.8.3 Algorithm ANSI X3.263-1995 in 9.2.2 describes return loss specifications for 100 BASE-TX devices at physical medium attachment (PMA). The receiver channel needs to meet the specifications described as below: ...
  • Page 48 100 BASE-TX Ethernet Compliance Test Application User Manual Figure 6-23 Receiver Return Loss Test Results Figure 6-24 Details for Receiver Return Loss Waveform i n t . s i g l e n t . c o m...
  • Page 49 We firmly believe that today SIGLENT is the best value in electronic test & measurement. Headquarters: SIGLENT Technologies Co., Ltd Add: Bldg No.4 & No.5, Antongda Industrial Zone, 3rd Liuxian Road, Bao'an District, Shenzhen, 518101, China...

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