QPHY-PCIE4-TX-RX

• PCIe Gen4 CEM compliance testing:
  • Transmitter preset and signal quality
  • Transmitter link equalization
  • Receiver test calibration
  • Receiver jitter tolerance
  • PCIe Gen4 Base specification testing:
  • Receiver test calibration
  • Receiver jitter tolerance
  • Transmitter measurements
• Fully automated stressed-eye calibration for PCIe 4.0 receiver Link Equalization testing
• Automated collection and analysis of waveforms for transmitter tests
• Transmitter Link Equalization leveraging ProtoSync transaction-layer decode for deeper insight and visibility
• Integration of the Teledyne LeCroy PCI Express 4.0 Compliance Board Controller - QualiPHY directly controls test fixture and DUT
• QualiPHY report generation feature creates comprehensive reports with all pertinent test information
• Link-layer and transaction-layer decode for system validation and debug

The PCI-SIG defines a standard set of CEM compliance tests that a device needs to pass for certification, and each test has unique requirements from the test equipment. QPHY-PCIE4-TX-RX first provides a step-by-step guide of how a customer's device and the test solution needs to be connected together to correctly perform the test. It then enables and configures the appropriate set of instrument features, performs the test, and records the results.

Often, compliance testing is a very difficult task. The user must make the necessary connections between the oscilloscope and the device under test, manually configure the oscilloscope for the appropriate measurement, perform the test procedure as specified by the test specification, record the results and finally compare the results to the appropriate limit in the compliance specification. QPHY-PCIE4-TX-RX performs many of these steps automatically, decreasing test time and improving repeatability and confidence.

On-chip PCI Express transmitters and receivers are designed and tested to the PCI Express Base specification, which defines fundamental electrical and protocol behaviors. Unlike CEM compliance, Base testing is not subject to an official compliance test program, but rather used to characterize device behavior. QPHY-PCIE4-TX-RX also covers Base specification testing. In addition, Teledyne LeCroy's Serial Data Analysis Expert software package includes emulation capability for PCI Express reference PLL and CTLE behaviors, for in-depth characterization and debug.

During transmitter link equalization, the transmitter's emphasis not only needs to respond to the correct equalization request, it needs to change within a specified time. The voltage waveform has information on when the change occurs at the physical layer, but not when the change request was made in protocol. ProtoSync leverages Teledyne LeCroy's industry-standard protocol analysis software to decode the acquired waveform up to the transaction layer. This enables QualiPHY to determine the precise timing of the equalization change request, for full visibility into link training behavior.

PCI Express 4.0 receiver test calibration requires running SigTest software over 200 times. If done sequentially, this could take several hours. The WaveMaster 8000HD best-in-class PC platform completes complex analysis processing tasks faster, resulting in better test throughput.

Testing for PCI Express requires multiple power cycles, reset operations, and transmitter preset toggles to be applied to the device under test. In previous iterations of the standard this was either a cumbersome manual process, or required expensive additional signal generators to automate. The Teledyne LeCroy TF-PCIE4-CTRL CBB automation controller is a low-cost accessory that connects directly to the oscilloscope an is fully integrated into QPHY-PCIE4-TX-RX to enable total test automation for PCIe Gen4 testing - further reducing test times and eliminating chances for operator error in complex test environments.

• Sets up and controls the Teledyne LeCroy WavePulser 40iX during measurements
• Guides the user with a connection diagram at each step of the process
• Automatically makes the measurements and transfers measured data to QualiPHY compliance test software
• Performs all the necessary additional calculations within the QualiPHY compliance test software
• Generates a complete report for the PCIe fixture characterization, equivalent to the existing manual process

QualiPHY is designed to reduce the time, effort and specialized knowledge needed to perform compliance testing on high-speed serial buses.

• Guides the user through each test setup
• Performs each measurement in accordance with the relevant test procedure
• Compares each measured value with the applicable specification limits
• Fully documents all results
• QualiPHY helps the user perform testing the right way—every time!