How the three devices work together.

SignalGeneration, UFI, and Tube Analyzer are each powerful standalone devices — but together they form a complete LV124 / LV148 test chain. This page explains the workflow, when to use them individually vs. together, and how they connect to the full RTStand platform.

The test workflow

Generate → Interrupt → Monitor

Every LV124 / LV148 electrical test follows the same three-step pattern. Each of these devices handles one step — and when combined, the RTStand system automates the entire sequence.

RTStand SignalGeneration

Generate the waveform

SignalGeneration produces the LV124 / LV148 voltage disturbance profile — transient voltages, superimposed alternating voltages, startup profiles, or custom waveforms — and sends it to the amplifier.

It also coordinates the timing: when should the UFI interrupt, how long should the interruption last, and in what sequence should multiple interfaces be tested.

Ultra-fast Interrupter (UFI)

Execute the interruption

The UFI performs the actual switching — interrupting power lines, CAN, LIN, Automotive Ethernet, or GMSL connections at the exact moment specified by SignalGeneration.

Each interruption is precisely timed — nanosecond resolution — and coordinates power and communication line switching simultaneously when the norm requires it.

Tube Analyzer

Monitor the ECU

The Tube Analyzer captures everything — voltage and current data — at 100kHz, time-synchronised. This is the measurement record that enables to decide whether the ECU passed or failed.

The data shows the disturbance profile and the ECU’s response on the same time axis — making it immediately clear whether the ECU maintained function, recovered correctly, or failed.

User Interface with test run display and signal output and signal monitoring for LV124 LV148

Standalone or integrated — your choice.

Each device works independently. Combine them when you need the full test chain — or buy only what you are missing.

Standalone use

You already have a test setup and need one specific capability

Your lab has existing instruments and infrastructure. You need to add a specific capability — interruption testing on Ethernet — without replacing everything.

→ Buy only the UFI to add Ethernet/GMSL interruption testing to your existing setup
→ Buy only SignalGeneration to control your UFI device

Discuss your setup with an engineer →

Full RTStand integration

You want a complete, fully automated LV124 / LV148 testing system

You want the full package — automated test execution, automated switching, automated monitoring, automated reporting — without building it yourself. This is what RTStand is.

→ All three devices come pre-integrated in every RTStand system
→ Automation layer handles test sequencing, ECU configuration, norm selection, and report generation
→ 24/7 unattended operation — no manual intervention between test cases

See RTStand system specifications →

Lab service

You do not want to buy or integrate anything — just get test results

You need LV124 / LV148 test results for your ECU but do not have the infrastructure. Ship your DUT to WKS and get results from a fully equipped lab.

→ Full LV124 / LV148 test runs in the WKS lab in Ravensburg
→ All three devices plus climatic chambers and full automation already in place
→ Results delivered with automated reports and time-synchronised data

Test in our lab →

From individual devices to full automation.

RTStand is what happens when all three devices are connected to a single automation layer. The software handles everything — test sequencing, ECU configuration, norm selection, and report generation — so your team can focus on the engineering.

All three devices pre-integrated and coordinated
47+ norm library, continuously updated
100% automated, 24/7 unattended operation
Buy or rent

Talk to an engineer

See the RTStand platform

LV124 / LV148 Testing Devices

Built by WKS Informatik GmbH · Ravensburg, Germany – Imprint

Interruptions – Monitoring – Signal Generation – Integration – Contact WKS