MSO3000: The Most Capable PC-Based Mixed-Signal Instrument

Engineers working on modern embedded systems face a fundamental problem: digital protocols, analog signals, and power rails all interact, and debugging one domain in isolation often misses the real issue. The MSO3000 series was designed to address this by combining a 4-channel digital storage oscilloscope (DSO), a 16-channel logic analyzer (LA), and over 120 protocol decoders in a single USB 3.0 instrument. No switching between tools, no correlating timestamps across separate captures. One instrument, one timebase, one view of your system.

Architecture: Analog and Digital in One Box

The MSO3000 is a PC-based instrument that connects via USB 3.0 to a Windows computer running Acute’s capture and analysis software. It houses two acquisition systems that share a common timebase:

Analog subsystem (4 channels): Functions as a full-featured digital storage oscilloscope. Each channel has its own ADC and front-end conditioning. The analog bandwidth, sample rate, and memory depth vary by model (see below), but all models provide simultaneous sampling across all four channels.

Digital subsystem (16 channels): A 16-channel logic analyzer with configurable threshold voltages. Each channel can be independently assigned to protocol decoders, bus groups, or used for pattern triggering. The digital channels capture at rates up to the instrument’s maximum logic analyzer sample rate.

Because both subsystems share the same clock and trigger infrastructure, analog and digital waveforms are inherently time-aligned. You can trigger on a protocol event detected on the digital channels and see the corresponding analog behavior on the same screen, or vice versa.

Model Lineup: E, B, H, and V

The MSO3000 comes in four models, each targeting different performance requirements:

MSO3000E (Entry): Provides the core mixed-signal architecture at an accessible price point. With analog bandwidth suitable for general embedded work and a generous logic analyzer sample rate, the E model handles I2C, SPI, UART, and similar protocols with ease. This is the right choice for engineers who need mixed-signal capability but are not working with high-speed interfaces.

MSO3000B (Balanced): Steps up the analog bandwidth and sample rate for applications that demand more analog precision. The B model is well-suited for power supply characterization alongside digital protocol debug. Faster analog sampling means you can resolve higher-frequency ringing, overshoot, and noise on power rails while simultaneously decoding the digital bus that controls a voltage regulator.

MSO3000H (High-performance): Designed for demanding applications where analog bandwidth and deep memory are critical. The H model’s higher bandwidth makes it capable of analyzing signal integrity on faster digital interfaces, while deeper memory allows longer captures at full sample rate. Engineers working on USB, DDR memory, or high-speed serial interfaces benefit from the H model’s specifications.

MSO3000V (Vanguard): The flagship model, offering the highest analog bandwidth, fastest sample rate, and deepest memory in the MSO3000 family. The V model targets design validation and compliance testing for the most demanding mixed-signal applications, where every millivolt and every picosecond of timing matters.

All four models share the same software, the same 16 digital channels, and the same protocol decoder library. Upgrading from E to V does not require learning a new tool.

Use Case Scenarios

Embedded Debug with Analog and Digital

A microcontroller communicates with a sensor over I2C, but the readings are intermittently wrong. With the MSO3000, connect two digital channels to SDA and SCL for protocol decoding, and an analog channel to SDA to inspect the actual voltage levels. The protocol decoder shows the I2C transactions, and the analog waveform reveals that SDA is not reaching a valid logic-high level during certain ACK phases because the pull-up resistor value is too high for the bus capacitance. The protocol decoder alone would show a successful transaction; the analog view reveals why the data is occasionally corrupt.

Power Integrity Plus Protocol Analysis

A DC-DC converter controlled by a PMBus (I2C-based) interface is not delivering the correct output voltage. Connect an analog channel to the converter output to measure ripple and voltage accuracy, another analog channel to the switching node to verify switching behavior, and digital channels to the PMBus SDA and SCL lines. Trigger on the PMBus write command that sets the output voltage and observe the converter’s analog response. The time-correlated view shows exactly how long the converter takes to settle to the new voltage, whether overshoot occurs, and whether the ripple specification is met.

Automotive Mixed-Signal Debug

A CAN-FD network in a vehicle ECU intermittently drops frames. Connect an analog channel to the CAN-H line to examine the actual bus voltage levels, and a digital channel pair to CAN-H and CAN-L for protocol decoding. The protocol decoder identifies which frames are lost, while the analog view shows that a ground offset between two nodes is reducing the differential voltage below the receiver threshold during arbitration. The MSO3000 captures both the protocol-level symptom and the analog-level root cause simultaneously.

Protocol Decoder Library

The MSO3000 includes over 120 protocol decoders covering:

• Low-speed serial: I2C, SPI, UART, 1-Wire, JTAG, SWD
• Automotive: CAN 2.0, CAN-FD, LIN, FlexRay, SENT
• Storage: eMMC, SD, SDIO
• Power delivery: USB PD, PMBus
• Audio: I2S, TDM, S/PDIF
• Display and video: HDMI (control channel), MIPI DSI/CSI (command mode)
• Memory: DDR (command decode), NAND flash
• Industrial: Modbus, DMX512, DALI

Each decoder is protocol-trigger capable, meaning you can trigger the instrument on specific protocol conditions rather than relying on edge or pattern triggers.

Who Is the MSO3000 For?

The MSO3000 targets engineers who work at the intersection of analog and digital. If your debugging workflow involves switching between a standalone oscilloscope and a separate logic analyzer, correlating timestamps manually, and wishing you could see both views on the same timebase, the MSO3000 eliminates that friction.

It is particularly valuable for:

• Embedded systems engineers designing products with mixed-signal I/O, sensor interfaces, and communication buses.
• Power electronics engineers who need to verify that power conversion circuitry responds correctly to digital control commands.
• Automotive electronics teams debugging multi-protocol networks where analog signal quality directly impacts digital communication reliability.
• Test and validation labs that want to consolidate multiple instruments into one, reducing bench space, cost, and the complexity of test setups.

The PC-based form factor means the MSO3000 benefits from your computer’s display, storage, and processing power. Large monitors provide expansive waveform views, fast SSDs enable deep capture storage, and the software takes advantage of multi-core processors for real-time protocol decoding. Unlike standalone benchtop instruments, you are not limited by a built-in screen or a fixed operating system.