Best 4-Channel Oscilloscopes 2026: Top Picks

The difference between 2-channel and 4-channel oscilloscopes is not just a spec number — it fundamentally changes how you debug. Consider SPI debugging: you need at minimum clock (SCLK), data out (MOSI), and chip select (CS). That's 3 channels. Add data in (MISO) for full-duplex capture and you're at 4. With a 2-channel scope, you're constantly swapping probes, re-triggering, and trying to mentally correlate captures you took at different times. With 4 channels, you see the entire bus simultaneously and find problems immediately. Same story with power supply debugging. Want to see how three different supply rails respond to a load transient at the same time? That's 4 channels. Want to correlate a voltage glitch on one rail with behavior on a microcontroller I/O pin? 4 channels. For anyone doing microcontroller development, multi-rail power supply work, or any debugging that involves correlating signals, 4 channels is worth the price premium over 2-channel scopes.

The Rigol DHO924S at $449 is the best 4-channel oscilloscope for hobbyists in 2026. 250MHz bandwidth, 4 channels, 50Mpt memory, a 7-inch IPS touchscreen, protocol decoding (SPI, I2C, UART, CAN, LIN), built-in function generator, and WiFi connectivity. The spec combination is genuinely unmatched at this price. Nothing from Siglent, OWON, or Hantek comes close to the DHO924S's overall package at $449. The touchscreen transforms the 4-channel debugging experience — you can view all four traces comfortably and manage cursors intuitively. If you're buying a 4-channel scope today and have $449 to spend, this is the obvious choice.

The DS1054Z at $349 remains one of the best-value 4-channel oscilloscopes available. 4 channels, 12Mpt memory, protocol decoding, and a comprehensive trigger set — all for $100 less than the DHO924S. The DS1054Z's limitations are well-known: dated interface, no touchscreen, 50MHz stock bandwidth. But for 4-channel SPI/I2C debugging, none of these are dealbreakers. The 50MHz bandwidth is fine for most microcontroller signals. The interface works — it just takes longer to learn. And the community support means any problem you encounter has already been solved. If the DHO924S is out of reach, the DS1054Z is still an excellent 4-channel scope.

If you need CAN bus decoding included without paying extra, the Siglent SDS1104X-U at $419 is the right choice. It includes CAN and LIN decoding out of the box — Rigol charges for CAN on most models. For automotive embedded work, vehicle diagnostic projects, or any application involving CAN or LIN bus signals, the SDS1104X-U is the most cost-effective 4-channel option with proper protocol support. 100MHz bandwidth and 14Mpt memory are solid specs for the work.

The OWON XDS3064AE at $799 is a specialized choice for users who need extreme memory depth above all else. You get 4 channels, 40Mpt memory (comparable to the DHO924S), a touchscreen, WiFi, and CAN protocol decoding — but only 60MHz bandwidth and a 14-bit ADC that delivers exceptional vertical resolution for low-amplitude signal analysis. At $799, it's priced alongside premium benchtop alternatives that offer significantly more bandwidth. The XDS3064AE makes sense for laboratory-style long-duration protocol capture on slow buses where the 14-bit ADC and deep memory justify the price. For most hobbyist use cases, the DHO924S at $449 is the better value.

For serious hobbyists and professionals willing to spend $1,099, the Siglent SDS2104X Plus is in a different class. 200Mpt memory depth, 10.1-inch IPS touchscreen, 2GSa/s sample rate, comprehensive protocol decoding including FlexRay and I2S, and a 25MHz AWG function generator. The 200Mpt memory is the headline — you can capture minutes of data at full sample rate. For tracking intermittent bugs, long-duration protocol sessions, or any application requiring extended captures, this is the tool. At $1,099, it's a serious investment that's only justified by serious use.

| Scope | Price | Bandwidth | Memory | Touchscreen | Protocol Decode | |-------|-------|-----------|--------|-------------|----------------| | Rigol DHO924S | $449 | 250MHz | 50Mpts | Yes (7") | SPI/I2C/UART/CAN/LIN | | Rigol DS1054Z | $349 | 50MHz | 12Mpts | No | SPI/I2C/UART | | Siglent SDS1104X-U | $419 | 100MHz | 14Mpts | No | SPI/I2C/UART/CAN/LIN | | Siglent SDS1204X-E | $775 | 200MHz | 14Mpts | No | SPI/I2C/UART/CAN/LIN | | OWON XDS3064AE | $799 | 60MHz | 40Mpts | Yes (8") | SPI/I2C/UART/CAN | | Siglent SDS2104X Plus | $1,099 | 100MHz | 200Mpts | Yes (10.1") | SPI/I2C/UART/CAN/LIN/FlexRay/I2S | **My recommendation:** For most people, the DHO924S at $449 is the right answer. If budget is tight, the DS1054Z at $349 is excellent. If you need CAN/LIN included, the SDS1104X-U at $419 undercuts the DHO924S price with solid protocol support.