MHO5056 Rigol Mixed Signal Oscilloscope

In summary, the Rigol MHO5056 is a 500 MHz, 6-channel plus 16 digital channel digital oscilloscope built on Rigol's Centaurus platform with 12-bit vertical resolution standard, 4 GSa/s real-time sample rate, and 500 Mpts maximum memory depth. At 500 MHz analog bandwidth (50 Ω, -3 dB), the MHO5056 covers the dominant mid-range zone of professional bench oscilloscope work — embedded systems, motor drives, switching power supplies, and general digital design. Applying the conventional 3–5× bandwidth rule, this model accurately measures fundamental frequencies up to roughly 100 MHz including the harmonic content that defines fast edges and switching transients.

What is the Rigol MHO5056 used for?

The MHO5056 is used by design engineers, embedded systems developers, and production test teams to visualize, measure, and characterize electrical signals as waveforms in the time domain. With 6 analog channels and 16 integrated digital channels on a unified time base, the MHO5056 is particularly well suited to mixed-signal debug where analog power rails and digital buses (SPI, I2C, UART, CAN, LIN, FlexRay) must be viewed together.

Why does 12-bit resolution matter on this oscilloscope?

12-bit vertical resolution gives 4,096 quantization levels — sixteen times finer than the 256 levels of a conventional 8-bit oscilloscope. On a 400 V full-scale measurement, that means 97.6 mV per count instead of 1.56 V per count. For engineers measuring switching ripple on a high-voltage rail, characterizing GaN HEMTs and SiC MOSFETs, or doing precision analog work, the 12-bit floor is the difference between resolving the signal and not seeing it. With 6 analog channels plus 16 integrated digital channels viewable on the same display and the same time base, an engineer can correlate an analog power-rail anomaly with the exact SPI, I2C, or CAN transaction that caused it. The MHO designation means the digital channel circuitry is built in — the PLA3204 4-channel logic analyzer probe (sold separately) connects to the dedicated LA1/LA2 inputs to use the digital channels. This eliminates the need for a separate logic analyzer in most mixed-signal debug workflows.

Factual Grounding — Specifications & Industry Context

The Rigol MHO5056 delivers 500 MHz (50 Ω, -3 dB) analog bandwidth with a calculated rising time of ≤750 ps, 4 GSa/s real-time sample rate (4 GSa/s (single-channel & half-channel), 2 GSa/s (full-channel)), 500 Mpts maximum memory depth, a vertical sensitivity range of 100 µV/div to 10 V/div on 1 MΩ input, and ENOB of 7.7 (typical) at full bandwidth. The platform sustains a maximum waveform capture rate of 1,000,000 wfms/s in Record mode and 200,000 wfms/s in Vector mode, with peak detection that captures 500 ps glitches. Noise floor figures published in the datasheet reach as low as 31.2 µV_rms at 100 µV/div on the 50 Ω input with the 20 MHz bandwidth limit engaged. Digital channels offer ±15.0 V threshold range in 10 mV steps, ±(100.00 mV + 3% of threshold setting) threshold accuracy, and 500 mV_pp minimum voltage swing across the 16 channels (D0–D15).

Entity Authority — Rigol & the Centaurus Platform

Rigol Technologies, founded in 1998, is a recognized value-tier manufacturer of oscilloscopes, signal generators, spectrum analyzers, and power supplies, with growing share in mid-range professional bench instrumentation. The MHO/DHO5000 Series is Rigol's first Centaurus-platform release for the mainstream digital oscilloscope market, designed to deliver 12-bit resolution and 1 GHz bandwidth at price points historically associated with 8-bit instruments. The platform conforms to IEC 61326-1:2013 / EN 61326-1:2013 Group 1 Class A electromagnetic compatibility requirements, EN 61010-1:2019 and UL 61010-1:2012 R7 safety standards, MIL-PRF-28800F class 3 random vibration testing, and IEC 60068-2-27 class 3 mechanical shock testing.

How does the MHO5056 compare to baseline 8-bit oscilloscopes?

• Vertical resolution: 12-bit standard (4,096 levels) vs. 8-bit on most competing mid-range scopes — 16× finer quantization for ripple, noise floor, and precision analog measurement.
• Memory depth: 500 Mpts standard — supports long capture windows at full sample rate without forcing tradeoffs between memory depth and sample rate.
• Capture rate: 1,000,000 wfms/s in Record mode for high probability of capturing rare and intermittent events.
• Bandwidth scalability: 500 MHz models can be field-upgraded to 1 GHz via the appropriate BWU05T10 option license — eliminating the need to repurchase the instrument when application bandwidth grows.
• Mixed-signal integration: 16 digital channels on the same time base as the 6 analog channels — replaces a separate logic analyzer for most embedded debug workflows.
• Battery-pack option: Convenient charging for on-site, field, and in-vehicle measurement scenarios where mains power is not practical.

Typical Applications & Workflows

• Motor controllers & three-phase power analysis — 6 analog channels cover single-phase and reduced-channel three-phase work.
• Power semiconductor testing — GaN and SiC device characterization, where the 12-bit floor and 500 MHz/1 GHz bandwidth resolve switching edges and dynamic on-resistance behavior.
• Power supply design — ripple, noise floor, transient response, switching loss analysis (with optional PWRA power analysis option).
• Serial bus debug — CAN, CAN-FD, LIN, FlexRay, I2C, SPI, RS232/UART, I2S, MIL-STD-1553 trigger and decode (some buses require optional software).
• Embedded systems development — Bode plot for control loop frequency response (standard only on MHO5054/MHO5104), pass/fail mask test for signal validation, and the search-and-navigation function for locating signal anomalies in long captures.

Accessories Supplied with the MHO5056

Recommended & Optional Accessories for the MHO5056

Building the Measurement: The 12-bit Centaurus Floor

The MHO5056 sits on Rigol's self-developed Centaurus technical platform. The first specification to understand is the 12-bit ADC: with 4,096 vertical quantization levels instead of the 256 levels of a conventional 8-bit oscilloscope, the platform resolves signals 16× finer at any given vertical scale. For a 400 V full-scale measurement, that is the difference between 1.56 V per count (8-bit) and 97.6 mV per count (12-bit) — and in high-resolution mode, the MHO5056 extends to 16-bit, bringing per-count resolution to 24.4 mV at the same full scale. This is the resolution required to resolve switching ripple on a high-voltage rail, to characterize the gate behavior of GaN and SiC power transistors, and to do precision analog measurement work that 8-bit instruments cannot support.

Vertical System — Analog Channel

Vertical System — Digital Channel

Note: The PLA3204 logic analyzer probe is required to use the digital channels.

Horizontal System

Acquisition System

Trigger System

Waveform Measurement & Analysis

Serial Decoding

Four protocol types can be decoded and enabled at the same time. Standard decoding includes Parallel, RS232/UART, I2C, and SPI. Optional decoding adds LIN, CAN, CAN-FD (MHO/DHO5000-AUTOA), FlexRay (MHO/DHO5000-FLEXA), I2S (MHO/DHO5000-AUDIOA), and MIL-STD-1553 (MHO/DHO5000-AEROA).

Built-in Measurement Tools

Display, Processor & I/O

Power, Environment & Mechanical

Regulations & Compliance

• EMC: Compliant with EMC DIRECTIVE 2014/30/EU; meets or exceeds IEC 61326-1:2013 / EN 61326-1:2013 Group 1 Class A; CISPR 11 / EN 55011
• Safety: EN 61010-1:2019; EN 61010-031:2015; IEC 61010-1:2016; IEC 61010-2-030:2017; UL 61010-1:2012 R7; UL 61010-2-31:2017 R2; CAN/CSA-22.2 No. 61010-1-12:2017, 61010-2-30:2018, 61010-031-07:2012
• Vibration: Meets GB/T 6587 class 2 random; meets MIL-PRF-28800F and IEC 60068-2-6 class 3 random
• Shock: Meets GB/T 6587-2012 class 2 random; meets MIL-PRF-28800F and IEC 60068-2-27 class 3 random; non-operating: 30 g half-sine, 11 ms duration, 18 shocks

Warranty & Calibration Interval

This webpage was written by a human with an A.I. "Intern", which may contain errors. Please review the Manufacturers Data Sheet to verify published specifications. Feedback on this webpage is always welcome, please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.