Keysight PLTS

Keysight Physical Layer Test System (PLTS) is the industry’s most powerful signal integrity software for high-speed digital designers—enabling accurate S-parameter analysis, channel characterization, compliance testing, and advanced de-embedding from time-domain reflectometry (TDR) and vector network analyzer (VNA) measurements. Version 2026.0 continues Keysight’s leadership in physical layer test, offering enhanced automation, multi-dimensional visualization, and deeper support for emerging high-speed standards (PCIe 6.0, DDR5, USB4 v2, 224G Ethernet). Whether characterizing backplane channels, validating connectors and cables, or performing pre-compliance testing for next-generation serial links, PLTS delivers the precision, scalability, and workflow efficiency that modern SI validation demands.

???? Primary Users

This professional signal integrity software is designed for:

  • Signal Integrity (SI) Engineers analyzing, characterizing, and validating high-speed digital interconnects.

  • Hardware Design Engineers & PCB Designers optimizing channel performance for serial links and memory interfaces.

  • Test & Validation Engineers performing compliance testing, debugging, and characterization.

  • High-Speed Connector & Cable Manufacturers qualifying products for PCIe, USB, Ethernet, and other standards.

  • Semiconductor & ASIC Designers characterizing I/O buffers and package parasitics.

⚡ Key Features & Capabilities

???? Multidimensional Signal Integrity Analysis

Mixed-Mode S-Parameters:

  • Single-ended, differential, and common-mode conversion

  • Mode conversion (SE↔DM, SE↔CM, DM↔CM)

  • Balanced and unbalanced DUT characterization

Time-Domain (TDR/TDT):

  • Impedance profile vs. distance

  • Discontinuity location (connector, via, stub, BGA ball, bond wire)

  • Step and impulse response (pulse response for equalization)

Eye Diagram & BER Analysis:

  • Statistical eye (bathtub curve, BER contour)

  • PAM4 and NRZ modulation support

  • Jitter decomposition (RJ, PJ, DCD, ISI)

Crosstalk & Multi-Active Channels:

  • FEXT/NEXT, aggressor-victim interaction

  • Multi-active (up to 20+ aggressors)

  • Worst-case crosstalk eye closure

???? Advanced S-Parameter Processing

De-Embedding & Fixture Removal:

  • Port extension, 2x‑thru, AFR (Automated Fixture Removal)

  • ECal / mechanical calibration integration

  • Probe-tip and board-tip reference planes

Passivity, Causality, Reciprocity:

  • Check and enforce for stable time-domain simulation

  • Rational function fitting (broadband SPICE model generation)

Data Compression & Export:

  • Touchstone (SNP) with reduced data footprint

  • Export to ADS, HSPICE, Ansys, Cadence, and other SI tools

???? Standards-Based Compliance Testing

Standard Data Rate PLTS Support
PCIe 6.0 64 GT/s (PAM4) Channel Operating Margin (COM), Tx/Rx equalization, package+board de-embedding
DDR5 / LPDDR5 up to 8400 MT/s Write/read leveling, DFE per pin, ODT, CA training
USB4 v2 (Type-C) 80 Gbps (PAM3) Passive cable, active cable (re-timer/re-driver), TDR/TDT for length & impedance
112G / 224G Ethernet 112 Gbps (CEI), 224 Gbps (draft) COM (IEEE 802.3ck/dj), PAM4 eye closure, FFE/DFE/CTLE optimization
HDMI 2.1 / DisplayPort 2.1 up to 48 Gbps (FRL), 80 Gbps (DP80) Cable assembly, PCB trace, connector, re-driver characterization

???? Automation & Scripting

  • PLTS Automation API (Python, MATLAB, C#)

  • Batch processing for production test (multiple DUTs, ports)

  • Limit testing – automatic pass/fail with statistical summary

  • Calibration wizard (2-port, 4-port, multi-port)

????️ Interactive Visualization

  • Smith chart, polar plot, magnitude/phase

  • 3D surface plot (frequency vs. port)

  • Crosstalk matrix heatmap

  • Rise time / fall time from pulse response

???? Keysight Instrument Integration

  • VNA (PNA, ENA, Streamline, FieldFox)

  • TDR (DCA‑X, DCA‑M)

  • Real-time oscilloscope (Infiniium UXR series)

???? What’s New in Version 2026.0

  • 224G Ethernet (draft) – COM, PAM4 eye closure, FFE/DFE/CTLE optimization

  • PCIe 6.0 (64 GT/s PAM4) – FLIT mode, retimer/re-driver characterization, Tx LEQ, Rx DFE

  • USB4 Active Cable – Re-timer specific tests (xDomain jitter)

  • PAM3 support – USB4 80 Gbps (native)

  • AI-Driven Eye Tuning – ML algorithm for optimal CTLE gain & DFE tap coefficients (seconds vs hours)

  • Multi-VNA Parallel Sweep – Automated 64‑port (or more) measurements for large backplane, ATE

  • Calibration Reminder – Schedule and track cal due dates (compliance, traceability)

???? Industry Applications

  • Datacom & Networking – 800G switch/router backplane, 112G/224G middle‑board optics

  • Consumer & PC – PCIe 6.0 add‑in card, DDR5 DIMM, USB4 active cable

  • Automotive – 1000BASE‑T1, PCIe for IVI, SerDes, automotive Ethernet, GMSL, FPD‑Link

  • Aerospace & Defense – High‑speed backplane (VPX, SOSA), high‑reliability connector (MIL‑DTL‑38999)

  • Semiconductor & ATE – Known‑good die, interposer, package, load board characterization