Mixed-Mode S-Parameters

Utilize our advanced TDR systems to measure mixed-mode S-parameters for evaluating differential and common-mode behavior of linear networks. Get a detailed insight into signal reflection, transmission, and mode conversion—critical for the design and validation of high-speed digital, RF, and mixed-signal systems.

Mixed mode measurements are specified in the BroadR-Reach Definitions for Communication Channel. Mixed mode measurements are specified in the BroadR-Reach Definitions for Communication Channel.
Mixed mode parameter measurement of UTP cable using SMA adapters. Mixed mode parameter measurement of UTP cable using SMA adapters.
Screenshot of QTNDA software, showing mixed mode parameter diagrams. Screenshot of QTNDA software, showing mixed mode parameter diagrams.
Measurement of USB mixed mode parameters using SMA adapters. Measurement of USB mixed mode parameters using SMA adapters.
QTNDA-300 used for measuring UTP cable. QTNDA-300 used for measuring UTP cable.

Which mixed-mode parameters can be measured?

  • Differential & common mode return & insertion loss
  • Mode conversion (reflection & transmission)

Which DUTs can be measured?

  • PCBs » Real physical PCBs
  • Cables » all kinds of cables up to 1km
  • Connectors » all kinds of connectors and adapters
  • Entire systems » e.g. with PCBs, interconnects, cables

Which TDR is best suited for your DUT?

  • Differential cables » QTDNA-300 (reflection & transmission)
  • Cables up to ≈1km, low resolution » DTDR-800 (reflection only)
  • Cables up to ≈50m, high resolution » DTDR-65 (reflection only)
  • PCBs, connectors, entire systems » DTDR-65 (reflection only)