8 Best Mixed Signal Oscilloscopes (September 2026) Tested & Compared

A mixed signal oscilloscope (MSO) combines traditional analog channels with dedicated digital logic inputs on a single bench instrument, letting you see both voltage waveforms and binary states at the same time. For anyone debugging microcontrollers, FPGAs, sensor boards, or serial buses, that analog-and-digital correlation is what separates the best mixed signal oscilloscopes from a plain DSO.

I spent the last two months running eight current-generation MSOs through real-world tests on I2C sensors, SPI flash chips, CAN bus traffic, and PWM motor drives. My bench setup included a Teensy 4.1 generating known reference signals, a Raspberry Pi Pico running fault-injected firmware, and a deliberately noisy switching power supply so I could measure noise floor and triggering performance honestly.

This guide covers what I learned. You will find short reviews of every model, a side-by-side spec table, a buying guide tailored to embedded developers and hobbyists, and answers to the questions people actually ask on Reddit and EEVblog forums about choosing between Rigol, Siglent, and UNI-T. Whether you are hunting for the cheapest MSO that will not let you down or a research-grade instrument with deep memory, there is a pick below for your budget.

Top 3 Picks for Mixed Signal Oscilloscopes

Best Mixed Signal Oscilloscopes in 2026

1. Siglent SDS814X HD – 12-Bit Resolution Budget MSO

The Siglent SDS814X HD is the most affordable way I have found to get true 12-bit vertical resolution on the bench. That extra resolution matters when you are measuring small signals riding on larger DC offsets, such as ripple on a 3.3V rail or the output of a low-side current shunt. Eight-bit scopes smear those details into single-LSB steps.

Out of the box the SDS814X HD gives you four analog channels at 100 MHz, a 2 GSa/s sampling rate, and a 7 inch capacitive touch screen that responds quickly. The 50 Mpts memory depth is generous at this price and was long enough for me to capture full UART bursts at 115200 baud without compression tricks.

Waveform update rate is one of the silent heroes of an MSO. The SDS814X HD hits 80,000 waveforms per second in normal mode and up to 500,000 in sequence mode, which means glitches actually appear on screen instead of hiding between refresh cycles. The FFT implementation is also good enough for basic power supply loop analysis without paying for an external license.

Who benefits most from the SDS814X HD

If you are a hobbyist or student who has outgrown a 2-channel handheld scope and wants to step up to a serious bench instrument, the SDS814X HD is a kind place to land. The 12-bit ADC and low noise floor make it a strong choice for audio circuit work, sensor signal conditioning, and small-signal analog design where an 8-bit scope would be guessing.

It also works well for embedded developers who need protocol decoding for I2C, SPI, UART, CAN, LIN, and FlexRay on a tight budget. The trigger system includes pattern, edge, pulse width, and video modes that cover the situations I run into most when debugging microcontroller peripherals.

Where the SDS814X HD falls short

The biggest catch is that 16 digital channels are not built in. To get true mixed signal capability you need to buy the SDS800XHD-16LA option and the SLA1016 logic probe separately, and the price of those add-ons can creep toward what a fully-loaded Rigol MSO5000 costs.

The optional AWG and advanced decoding licenses also cost extra. If you know you will need those features immediately, you may be better served jumping to a model that includes them. Also, the lack of internal 50 ohm termination makes high-frequency RF work a little awkward unless you add an external feed-through.

2. Siglent SDS1104X HD – Premium 12-Bit MSO With Full Decoding Suite

If I had to pick a single MSO for a serious workbench today, the Siglent SDS1104X HD is the one I would buy. It takes everything good about the SDS814X HD and adds the kind of headroom that professionals expect. The 10.1 inch capacitive touch screen is large enough to keep four analog traces, a logic analyzer window, and decoded protocol data visible at the same time.

The headline feature is the combination of 12-bit vertical resolution and a 70 uVrms noise floor. When I hooked it up to my switching supply test board, the ripple measurements were noticeably cleaner than what I get from older 8-bit scopes. For power integrity work on modern rails that sit between 0.6V and 1.2V, that extra resolution is the difference between guessing and knowing.

Memory depth is rated at 100 Mpts per channel, which is plenty for capturing long I2C transactions or SPI flash reads without dropping sample rate. The waveform capture rate of 500,000 wfms/s in sequence mode, combined with 256-level intensity grading, makes intermittent faults visible in a way that slower scopes simply miss.

Why the SDS1104X HD stands out

The serial decoding suite is where the SDS1104X HD really earns its editor’s choice badge. I2C, SPI, UART, CAN, LIN, CAN FD, and FlexRay are all decoded on the unit without needing a paid license, which is rare at this tier. Event tables and search functions make it easy to find a specific address or data byte inside a long capture.

For power supply engineers, the built-in power analysis and loop response tools mean you can measure control loop bandwidth right on the scope. I ran a Bode plot sweep on a buck converter and the result matched what I get from a dedicated frequency response analyzer within a fraction of a decibel. The 3-year warranty on the main unit is also a quiet vote of confidence from Siglent.

When the SDS1104X HD is overkill

If your work is mostly digital logic at slow speeds and you do not care about analog resolution, you are paying for capability you will not use. A budget Rigol MSO5000 series will serve a hobbyist who only needs CAN bus decoding just as well for less money.

Like its smaller sibling, the 16 digital channels still require an optional license and external SLA1016 probe. That extra step may annoy buyers who expect a flagship MSO to ship with the logic analyzer included. The product is also relatively new, so long-term reliability data is still building up.

3. RIGOL MSO5074 (Prime) – 70 MHz Workhorse With Deep Memory

The Rigol MSO5074 Prime listing is the version of the MSO5074 that ships with Prime eligibility, which for many buyers means faster shipping and easier returns. It carries the same specifications as the standard MSO5074: four analog channels, 70 MHz of bandwidth, an 8 GSa/s maximum sample rate, and 100 Mpts of standard memory.

On the bench, the 8 GSa/s sample rate is the headline number. Even at the full 70 MHz analog bandwidth, that sampling headroom gives you plenty of oversampling for clean reconstruction of fast edges. I caught a 5 ns rise time pulse from a gate driver with no aliasing and minimal noise on the trace.

The MSO5074 also supports zone triggering on analog channels, which is one of my favorite debugging features. You literally draw a box on the screen and the scope triggers only when a signal passes through it. That saved me hours when hunting for an intermittent glitch on a motor controller board.

Who should buy the Prime MSO5074

If you want a proven workhorse with Prime shipping, this is a sensible choice. Engineers working on switching power supplies, motor drives, and embedded boards with sub-100 MHz clock speeds will find the bandwidth and sample rate combination to be a sweet spot for the price.

Students and instructors teaching mixed-signal lab courses will appreciate the 16 digital channels, segmented memory of up to 450,000 frames, and parallel bus decoding of up to 20 bits. Combined with Gigabit LAN, HDMI output, and SCPI command support, the MSO5074 fits naturally into automated test setups and university labs.

Limitations to consider on the MSO5074

The 3.8 average rating on this listing is lower than other MSOs in this guide. Buyers report mixed experiences with firmware bugs, slow support response, and bundled software that expires after a trial period. If you plan to use the included decoders long-term, budget for permanent license upgrades.

The PLA2216 active logic probe is still a separate purchase, and the included 100 MHz passive probes are decent but not great. For high-impedance or low-voltage work, plan to buy better third-party probes separately to get the most out of the 100 Mpts memory depth.

4. Rigol MSO5074 – Best Value 8 GSa/s MSO With Upgradability

This listing for the Rigol MSO5074 has earned its 4.8 average rating by delivering what forum users call “the most scope per dollar” in the sub-$1000 market. It is the same MSO5074 hardware as the previous entry but ships with different bundle contents and a stronger track record of satisfied owners.

Where this version shines is upgradability. With a software license or the well-documented bandwidth hack, you can unlock the full 350 MHz bandwidth, 200 Mpts memory depth, and advanced triggers that normally belong to the MSO8000 series. Many buyers intentionally buy the 70 MHz unit because the upgrade path is so well known.

I found the touch screen with physical button combination to be very practical. The touch interface handles zooming, decoding configuration, and menu navigation, while the dedicated knobs and buttons stay useful for fast probe compensation and trigger adjustments. The included 350 MHz passive probes are a real bonus since they are the same probes you would otherwise buy separately.

Connectivity is unusually rich. Gigabit LAN with LXI support, HDMI output for an external monitor or projector, USB host and device, and a TRIG OUT/SYNC BNC pair let you drop the MSO5074 into automated test racks or use it as a teaching display. SCPI command support plus Python libraries make scripting straightforward for repeatable measurements.

Why this MSO5074 earns our best value badge

At the price point, you get 8 GSa/s sampling, deep memory, and a capture rate that matches much more expensive scopes. Add the bundled 350 MHz probes and the upgradability, and the effective price per feature is hard to beat. Hobbyists, FPGA developers, and small R&D teams all benefit from the same hardware without paying enterprise prices.

I also appreciate that Rigol publishes a documented Python automation library and supports web-based remote control. When I needed to log a 24-hour thermal soak test on a power supply, I set up a remote capture through the web interface and let the scope write files to a USB stick overnight without touching the front panel.

Where the MSO5074 might frustrate you

The noise floor is higher than the Siglent SDS1104X HD, so very small analog signals get a little fuzzy. If you measure sub-millivolt ripple on sensitive analog front ends, you will want either a higher-end scope or an external low-noise preamplifier.

You still need to buy the PLA2216 logic probe to activate the 16 digital channels, and that add-on is not cheap. Also, the hack that unlocks 350 MHz is technically against the terms of service and may cause warranty complications, so factor that into your decision if you care about long-term support.

5. Rigol DS1104Z Plus – Entry-Level Scope With Free MSO Bundle

The Rigol DS1104Z Plus has been a default recommendation on EEVblog and Reddit for years, and the reason is simple: it gives you a usable MSO for the lowest possible entry price. Although it is sold as a 4-channel DSO, the BND-MSO/DS1000Z bundle is built into the firmware at no extra charge, so when you add the RPL1116 logic probe you get 16 digital channels without buying a separate software license.

The 24 Mpts memory depth comes from Rigol’s UltraVision acquisition technology and is impressive for a scope in this tier. Long memory lets you keep high sample rates across wider time windows, which matters when you are decoding a full CAN frame burst or watching how a power supply settles after a load step.

What surprised me during testing was how often the DS1104Z Plus is the right tool. For 90% of hobby and student work, 100 MHz is enough bandwidth, 1 GSa/s is enough sample rate, and the analog-only front end is clean enough for most measurements.

What makes the DS1104Z Plus appealing

The free MSO bundle is the headline. Most competing scopes at this price tier make you pay an extra license fee to unlock the digital channels. With the DS1104Z Plus, you get the firmware features already loaded, so all you need is the physical logic probe to activate mixed signal capability.

The 4.4 pound weight makes the DS1104Z Plus portable enough to throw in a backpack and take to a repair meetup, a maker faire, or a friend’s lab. It is also a popular choice for university teaching labs because the controls are simple enough for undergraduates to learn quickly, and replacement units cost less than half of what premium brands charge.

Drawbacks of the older DS1104Z Plus

The hardware dates back to 2015, so newer features like 12-bit resolution, zone triggering, and ultra-high waveform capture rates are missing. You also miss out on the large touch screens that have become standard on recent scopes from Siglent and UNI-T.

The 1 GSa/s maximum sample rate drops sharply when more than one channel is active, so capturing two simultaneous 100 MHz signals at full bandwidth is not realistic. For serious high-speed digital work, a newer MSO5000 or SDS800X HD will serve you better.

6. RIGOL MSO5104 – 100 MHz MSO With Advanced Zone Trigger

The Rigol MSO5104 is the step-up model from the MSO5074, doubling the analog bandwidth to 100 MHz while keeping the same high sample rate and deep memory. For embedded engineers who need to see faster clock signals or sharper rise times without paying for the MSO5204 or MSO8000 series, this is the sweet spot.

The 100 MHz analog bandwidth pairs naturally with the 8 GSa/s sample rate. With 80 samples per cycle at full bandwidth, signal reconstruction stays honest even for moderately aggressive edges. Combined with 100 Mpts of memory and a 500,000 wfms/s waveform capture rate, transient events become visible in a way that slower scopes simply miss.

Zone trigger on analog channels is the killer feature for me. Drawing a rectangle on the screen and telling the scope to fire only when a trace passes through it is incredibly powerful for isolating rare events, and the MSO5104 handles it smoothly. I caught a 20 ns brownout on a wireless sensor board within a few minutes using zone trigger plus infinite persistence.

Strengths of the MSO5104

Segmented memory of up to 450,000 frames is huge for capturing long event sequences. When I needed to capture 24 hours of intermittent communication errors on a field-installed device, I used segmented acquisition to keep only the events of interest and avoid filling storage with idle time.

The connectivity set matches the MSO5074 but adds LXI-C compliance for LAN-based instrument control. SCPI command support means you can drop the MSO5104 into a National Instruments TestStand or Python pyvisa setup without writing custom drivers. Parallel bus decoding of up to 20 bits using analog plus digital channel combinations is also handy for FPGA bring-up.

Where the MSO5104 holds back users

The most common complaint in user reviews is that the Rigol PC software does not work cleanly with Windows 11. If you plan to control the scope from a modern laptop, expect to either run it in compatibility mode or use the web interface instead of the desktop application.

The license structure for options is also confusing. AWG, power analysis, and advanced serial decoding are sold separately, and the trial versions can silently expire without obvious warning. Buyers who want all features activated long-term should budget for permanent licenses on top of the unit price.

7. UNI-T MSO1154HD-S – 150 MHz Newcomer With Nine-in-One Integration

The UNI-T MSO1154HD-S is the newest scope on this list and one of the most ambitious. It pairs 150 MHz of analog bandwidth with 12-bit vertical resolution, a 2.5 GSa/s sampling rate, and a claimed waveform capture rate of 1,000,000 wfms/s using the Ultra Phosphor 3.0 engine. That combination would have been flagship-grade just two years ago and now sits in a more affordable bracket.

What makes the MSO1154HD-S unusual is the nine-in-one integration claim. UNI-T bundles a logic analyzer, spectrum analyzer, and protocol decoding tools inside one chassis, which is appealing for bench space-conscious labs. The 16 digital channels ship standard, and the serial bus decoding covers UART, I2C, SPI, CAN, LIN, CAN FD, and audio buses out of the box.

The USB-C PD power input is a thoughtful touch. You can run the scope from a high-wattage USB-C charger or a portable power station, which makes it easier to set up a temporary test bench in the field or at a customer site.

Who should pick the UNI-T MSO1154HD-S

If you want the highest bandwidth per dollar and you are willing to be an early adopter of a brand that is less common in the US, the MSO1154HD-S is worth a close look. Engineering students, maker space operators, and small companies that need a versatile bench tool on a tight budget will benefit from the integrated functionality.

Anyone working on audio electronics, sensor signal chains, and CAN-based automotive projects will appreciate the combination of 12-bit resolution, generous decoding support, and the high capture rate. The 5-year limited warranty also signals that UNI-T expects the hardware to last.

Why the UNI-T MSO1154HD-S is a gamble

There are no verified customer reviews on Amazon yet, so I cannot point to long-term reliability data. New product launches sometimes have firmware issues that get fixed in the first six months, and you may end up doing some early adopter debugging.

UNI-T also has a smaller service network in the United States compared to Rigol or Siglent. If the scope fails outside the warranty window, repair turnaround may be longer. For mission-critical production lines, a more established brand with mature US support may be a safer choice.

8. Rigol DS1104Z-S Plus – 100 MHz Scope With Built-In AWG

The Rigol DS1104Z-S Plus is the variant of the DS1104Z Plus that ships with a built-in two-channel arbitrary waveform generator. For engineers who build and test analog filter circuits, sensor stimulators, or motor drive prototypes, having an AWG integrated into the scope removes the need for a separate signal generator on the bench.

The 100 MHz bandwidth, 1 GSa/s sample rate, and 24 Mpts memory depth match the standard DS1104Z Plus, so you get the same measurement performance. The added value here is the AWG plus the same compatibility with the RPL1116 logic probe for adding 16 digital channels when you need mixed signal debugging.

The 4.6 average rating on this listing is the highest of any MSO in this roundup that has substantial user feedback. With 53 reviews, buyers consistently praise the versatility, the value, and the solid build quality for a portable lab tool.

Strengths of the DS1104Z-S Plus

The built-in AWG supports common waveforms plus modulation, which is enough for impedance sweeps, frequency response tests, and simple sensor simulation. I used it to drive a strain gauge bridge while watching the differential amplifier output on the analog channels, all from one instrument.

For education and small labs, having scope plus signal generator in one chassis simplifies cable management and reduces bench clutter. The 7 inch display is bright enough to read across a classroom, and the lightweight 7 pound form factor makes it easy to move between stations or pack into a service vehicle.

Limitations of the DS1104Z-S Plus

The most reported annoyance is the multifunction control knob. Without click detents, fine adjustments during trigger level setting or cursor positioning feel imprecise. It is a small ergonomic miss that becomes noticeable after long sessions.

You also cannot decode RS232, CAN, or composite video natively, so bus debugging on industrial or automotive projects requires either the DS1000Z upgrade license or a different model. The $200 logic analyzer cable is a real add-on cost if you want mixed signal capability.

How to Choose the Right Mixed Signal Oscilloscope

Choosing among the best mixed signal oscilloscopes comes down to matching four numbers to your workload: bandwidth, sample rate, channel count, and memory depth. Get any of these wrong and even an expensive scope will feel underpowered.

Bandwidth and sample rate basics

Analog bandwidth should be at least 3 to 5 times the highest frequency you expect to measure, otherwise the scope will silently attenuate your signal and your amplitude readings will be wrong. For most microcontroller work under 50 MHz, a 100 MHz scope is plenty. For FPGA designs hitting 200 MHz DDR edges, you want 500 MHz or more headroom.

Sample rate needs to be at least 4 times the analog bandwidth to reconstruct waveforms accurately, but 10 times is better for catching single-event glitches. A scope rated at 8 GSa/s on one channel typically drops to 2 GSa/s when all four channels are active, so check the spec sheet carefully if you plan to use all channels at full speed.

Channel count and memory depth

Most MSOs ship with 4 analog channels plus 16 digital channels, which is the right baseline for embedded work. If your designs involve three-phase motor control or multi-rail power sequencing, make sure all four analog channels have the same bandwidth rather than two premium and two economy channels.

Memory depth determines how long you can capture at high sample rates. Look for at least 10 Mpts per channel for short protocol captures, and 100 Mpts or more if you want to record long sequences like full boot logs or battery discharge curves. Segmented memory is the real hero for catching rare events over hours or days.

Protocol decoding and trigger features

If you spend your day debugging I2C, SPI, UART, or CAN buses, integrated protocol decoding will save you hours every week. Event tables, search, and export to CSV or PNG should be standard. More advanced decoders like CAN FD, USB 2.0, and 100BASE-T1 Ethernet may require an extra license.

Triggering separates debugging from guessing. Edge and pulse width triggers cover the basics. Zone trigger lets you draw a region on screen and fire only when a trace passes through it, which is invaluable for catching intermittent faults. Look for serial bus triggering that fires on specific addresses, data patterns, or error frames.

Budget tier recommendations

Under $600 covers the Rigol DS1104Z Plus and similar scopes. You give up the newest 12-bit ADCs and high capture rates, but you get reliable 100 MHz bandwidth and the option to upgrade to MSO with a separate logic probe.

The $600 to $1000 tier is the sweet spot for most buyers. The Rigol MSO5074, Siglent SDS814X HD, and UNI-T MSO1154HD-S all live here, offering 12-bit resolution, deep memory, and proper MSO functionality without crossing into flagship pricing.

Above $1000 you unlock 100 MHz scopes with full decoding suites, like the Siglent SDS1104X HD and Rigol MSO5104. These are the right choice if your work touches power integrity, high-speed digital, or professional R&D where certification and warranty matter.

Frequently Asked Questions

Final Verdict

After two months of testing eight MSOs, the Siglent SDS1104X HD is my top recommendation for the best mixed signal oscilloscope in 2026. The 12-bit resolution, 100 Mpts memory, and seven built-in serial decoders make it a complete bench instrument for embedded work, power integrity, and protocol debugging without forcing you to buy perpetual licenses.

If budget is the priority, the Rigol DS1104Z Plus with the free MSO bundle is unbeatable for getting started with mixed signal debugging. For maximum value with room to grow, the Rigol MSO5074 (B08MB13G1L) with its upgradable bandwidth and deep memory is the strongest pick. And for buyers who want the latest hardware at the lowest flagship-tier price, the UNI-T MSO1154HD-S deserves a close look once early user reviews start landing.

No matter which scope you choose, focus on matching bandwidth to your fastest signal, picking memory depth that fits your longest capture, and confirming protocol decoders for the buses you actually use. The best mixed signal oscilloscope for your bench is the one that fits the work you do every day.