QPHY-MultiGBase-T1

• Support for 2.5/5/10 G MultiGBase-T1 (IEEE 802.3cg)
• Highly automated and easy-to-use
• Complete test solution including test fixture, signal generator & cables
• Report generation with pass/fail results and fully annotated screenshot
• Supports all PMA Transmitter Tests
  • Maximum Output Droop
  • Transmitter Linearity
  • Transmitter Timing Jitter
  • RJ Transmitter MDI Random Jitter
  • DJ Transmitter MDI Deterministic Jitter - Pk-Pk Deterministic Jitter (DJpk-pk)
  • DJ Transmitter MDI Deterministic Jitter - Pk-Pk Even Odd Jitter (EOJpk-pk)
  • Transmitter Power Spectral Density (PSD) and Power
  • Transmitter Peak Differential Output
• Advanced debugging ability with "Stop on Test"

QPHY-MultiGBase-T1 performs electrical compliance testing of the Physical Media Attachment (PMA) according to the MultiGBase-T1 specification. Detailed connection diagrams ensure the proper setup and provide information about the required test pattern for each test. Upon completion of the test session, results are automatically compiled into a comprehensive report including screenshots.

Using the "Stop on Test" feature, the user can pause testing after each individual test and observe the results. At that point, any of the oscilloscope’s tools can be leveraged for further debug and upon completion, testing can be seamlessly resumed with a click of a button.

The droop test is performed to ensure that there is not excessive filtering happening between the transmitter output and the MDI output (connector). Droop is calculated after measuring the voltage 4 ns after the initial zero crossings (Vinit) and the voltage 16 ns after the zero crossing (Vdelay).

The transmitter linearity test verifies that the transmitter Signal-to-noise and distortion ratio (SNDR) exceed the specified amount. The signal is measured in Test Mode 4 while the PHY is transmitting a continuous PAM4 signal with PRBS13Q pattern.

For MultiGBase-T1 the jitter is measured under different conditions. The first two, which are called transmitter timing jitter, are measured on the 175 MHz clock output where the DUT is in master or slave configuration. The next one is called transmit MDI random jitter and it is measured on the MDI interface when the DUT is sending a pattern which is similar to a 175 MHz clock signal.

This test measures the deterministic jitter on the MDI interface using two different patterns and setups. The first test measures the deterministic jitter (DJpk-pk) using the JP03A test pattern and the second test measures the Even Odd Jitter (EOJpk-pk) using JP03B test pattern.

The Power Spectrum Density (PSD) measures a signal's power content versus frequency and shows how the energy of a signal is distributed. Using the oscilloscope for the PSD test removes the need to purchase a spectrum analyzer.