Teledyne-lecroy QPHY-PCIe Manuel d'utilisateur télécharger pdf (Page 20)

QPHY-PCIE Testing

Test Preparation

Before beginning any test or data acquisition, warm the oscilloscope for at least 20 minutes.

Calibration is automatic under software control and no manual calibration is required. This

procedure will be run again if the oscilloscope temperature changes by more than a few degrees.

Required Test Modes

The QPHY-PCIE script requires that you place the DUT in the required test modes. The script

will prompt you to do so before each test, but it is recommended that you ensure the DUT is

capable of being placed in the required test modes before beginning testing.

Physical Setup

See the description of each test configuration for specific set up information.

QPHY-PCIE Test Configurations

Test configurations include variable settings, limit sets, and test selections.

For detailed descriptions of calibration and testing, please refer to the Teledyne LeCroy PCIE

Gen1 and Gen2 test procedures on PCISIG.com and the official test specification, PCI Express

Card Electromechanical Specification, Rev. 3.0.

2.5 GTs Clock Jitter Test

This configuration runs only Test 1.6 Clock Jitter for 2.5Gbps signals. Variations exist for

different source configurations: differential inputs on Input A or Input B, and single inputs on

Input A or Input B. This test requires the use of the PCI Express Clock Phase Jitter Test

Software, which can be downloaded from:

http://www.pcisig.com/specifications/pciexpress/compliance/compliance_library

Demo

This configuration runs all the Transmitter tests using waveforms saved on the oscilloscope in

D:\PCIe\Demo and the default limit set, Compliance Limits. This configuration is meant to easily

demonstrate the QPHY-PCIE capabilities when live signals cannot be tested. You will see

dialogs and connection diagrams similar to what you would see during an actual test.

Empty Template

This configuration includes all tests and default variable settings specified in the PCIe standard.

It is meant to serve as a basis for creating custom configurations. The limit set in use is PCIe

2.1. Copy and save it with a unique name, then follow the steps in Customizing QualiPHY

modify the new configuration.

Signal Quality Test (CEM), Add-in Card

This configuration is meant to run all of the transmitter tests on a PCIe Add-In card. All the

variables are set to default, except Device Type is set to “Add-In” and CleanClock is set to “Yes”.

The limit set used is PCIe 2.1. Both 2.5Gbps and 5.0Gbps Signal Quality tests are run.

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Teledyne-lecroy QPHY-PCIe Manuel d'utilisateur Page 20