Siglent SDS1104X-U 100MHz Four channel oscilloscope
SIGLENT’s new SDS1104X-U 4 channel 100MHz bandwidth Super Phosphor Oscilloscope has a maximum sample rate of 1 GSa/s and a standard record length of 14 Mpts. For ease-of-use, the most commonly used functions can be accessed with its user-friendly front panel design. Serial bus decoding for IIC, SPI, UART, CAN, and
LIN bus types are included
Four channels, 100 MHz, and nothing important left out
The SDS1104X-U is the entry point of Siglent’s SDS1000X family and the least expensive four-channel oscilloscope they make. It is a Super Phosphor instrument: 100 MHz across four channels, 1 GSa/s, up to 14 Mpts of record length, and a waveform capture rate of 400,000 per second in sequence mode.
What is unusual at this price is what it does not charge for. Serial triggering and decoding for I²C, SPI, UART/RS-232, CAN and LIN is standard, with the tabular event list. So are 38 automatic measurements with statistics computed over every sampled point, a 128 k-point FFT with peaks and markers, an 80,000-frame history buffer with search and navigate, hardware pass/fail at 40,000 decisions a second, and a 256-level intensity-graded display. There are no software licences for this model — not because they are bundled, but because none exist.
It is bought mostly by teaching laboratories, repair and service benches, embedded developers and anyone who has worked out that four channels answers more questions than a bigger bandwidth number on two. It ships with four PP510 probes, one per channel, which on an instrument at this price is a meaningful part of what you are paying for.
One thing to understand before you order, because no listing states it plainly: this instrument has one acquisition memory and one converter. The sample rate and the record length are shared out as you switch channels on. The next section gives the exact figures.
- Four PP510 probes in the box, one per channel
- I²C, SPI, UART, CAN and LIN decode — no licence
- Three-year manufacturer warranty
- EU stock, ships from the Netherlands
- ISO or DKD/DAkkS calibration available
Why engineers buy this one
All standard, on every unit.
Four channels, not two
Clock, data, chip select and the supply rail on screen together. Most difficult measurements turn out to be about causality between more than two things.
Serial decode with nothing to license
I²C, SPI, UART/RS-232, CAN and LIN hardware triggering and decoding, with the tabular event list. On many competing instruments this is a paid option.
400,000 waveforms per second
100,000 wfm/s normally, 400,000 wfm/s in sequence mode, into as many as 80,000 timestamped segments. This is the number that decides how long you wait for a rare fault.
14 Mpts of record length
On a single channel. Capture at a slow timebase and use the hardware zoom afterwards, instead of guessing the right sweep speed before the event happens.
128 k FFT with peaks and markers
A hardware maths co-processor, a peak table sorted by amplitude, and enough resolution to separate two tones 2 kHz apart at 300 kHz.
Hardware pass/fail and full SCPI
40,000 mask decisions per second driving a 3.3 V TTL line, and SCPI over LAN and USB-TMC — enough to sit in a functional-test fixture rather than only on a bench.
What you get on one, two and four channels
The SDS1104X-U has a single 1 GSa/s converter and a single acquisition memory, shared across whichever channels are on. That is normal for an instrument at this price and it is not a fault — but it does mean the headline figures belong to the single-channel case, and you should know the others before you order rather than after.
| Channels on | Sample rate | Record length | In practice |
|---|---|---|---|
| 1 channel | 1 GSa/s | 14 Mpts | The full specification. Use it when you are measuring an edge and want every sample. |
| 2 channels | 500 MSa/s | 7 Mpts per channel | Comfortable for buses, rails and control loops — 500 MSa/s is 50 samples per bit on a 10 MHz SPI clock. |
| 3 or 4 channels | 250 MSa/s | 3.5 Mpts per channel | The four-channel case. Still about ten samples per period at 25 MHz, and 14 ms of record at 250 MSa/s. |
Sample rates: SDS1000X-U data sheet DS010AH-E01A. Record lengths: SDS1000X-E & SDS1000X-U user manual EN05B, “Memory Depth” — the only document that publishes the per-channel split.
How to work with it
Use all four channels for the work four channels are for — sequence, causality, a bus and its rail together — where 250 MSa/s is far more than enough. When you need to measure an edge accurately, switch the others off and let the one channel have the full 1 GSa/s and 14 Mpts. The instrument prints its current sample rate in the top-right corner of the screen at all times, so you always know which case you are in.
Serial decoding, included
Hardware triggering and decoding for I²C, SPI, UART/RS-232, CAN and LIN, on every unit, with nothing to license and nothing to plug in. Trigger on a specific address, a data pattern, a missing acknowledge, a framing error or a CAN identifier, and read the result as a table rather than as edges.
This is the feature that decides most purchases in this class. Counting bits by eye to establish that a master addressed the wrong device takes an afternoon; the event list answers it in one screen. On many competing instruments the same capability is a paid option that costs a noticeable fraction of the oscilloscope.
Combine it with sequence mode — up to 80,000 timestamped segments — and the intermittent bus fault that only appears once an hour becomes something you can capture unattended and then walk back through frame by frame.
A 128 k FFT with a peak table
The maths co-processor transforms up to 131,072 points, with rectangular, Blackman, Hanning, Hamming and flat-top windows, and displays the result full screen, split or on its own. Peaks and markers are supported: the instrument finds the peaks, sorts them by amplitude and lists each one with its frequency, so you are not placing cursors by hand.
Resolution is what that buys. In the capture beside this text the bin spacing is about 15 Hz, which is why 300 kHz and 302 kHz appear as two clean peaks instead of one broad hump. Finding a beat frequency on a switching supply, an unexpected harmonic, or mains hum on an analogue rail is a routine measurement rather than a project.
The other maths functions — add, subtract, multiply, divide, differentiate, integrate and square root — run on the same co-processor, so turning them on does not slow the acquisition or the front panel down.
Full specifications
From the SDS1000X-U data sheet, Rev. DS010AH-E01A, except the per-channel record lengths, which are published only in the shared user manual EN05B.
| Model | SDS1104X-U |
| Bandwidth (−3 dB) | 100 MHz |
| Channels | 4 |
| Sample rate | 1 GSa/s one channel · 500 MSa/s two channels · 250 MSa/s four channels |
| Record length | 14 Mpts one channel · 7 Mpts/ch two channels · 3.5 Mpts/ch three or four channels |
| Vertical resolution | 8-bit |
| Vertical scale | 1 mV/div to 10 V/div in 1-2-5 steps (probe 1×) |
| Offset range | ±2 V from 1 mV/div to 200 mV/div · ±100 V from 206 mV/div to 10 V/div |
| Input | 1 MΩ ±2% in parallel with 11 pF ±2 pF · DC, AC and GND coupling · max. 400 Vpk (DC + peak AC below 10 kHz) |
| DC gain accuracy | ±3.0% from 5 mV/div to 10 V/div · ±4.0% at 2 mV/div |
| Rise time (typical) | 3.5 ns |
| Bandwidth limit | 20 MHz |
| Channel-to-channel isolation | >40 dB, DC to full bandwidth |
| Acquisition modes | Normal, peak detect (2 ns), average (4 to 1024), ERES (0.5 to 3 bits) |
| Timebase | 2 ns/div to 100 s/div · accuracy ±25 ppm · roll mode from 50 ms/div · channel skew <100 ps |
| Waveform capture rate | 100,000 wfm/s normal · 400,000 wfm/s sequence |
| Sequence and history | Up to 80,000 segments · up to 80,000 history frames, with search and navigate |
| Trigger types | Edge, slope, pulse width, window, runt, interval, dropout, pattern, video (NTSC, PAL, 720p, 1080i, 1080p, custom) |
| Trigger coupling | DC, AC, LF reject, HF reject, noise reject · holdoff 80 ns to 1.5 s · jitter <100 ps |
| Serial trigger & decode | I²C, SPI, UART/RS-232, CAN, LIN — standard |
| Maths | +, −, ×, ÷, FFT (128 kpts, peaks and markers), d/dt, ∫dt, √ · FFT windows: rectangular, Blackman, Hanning, Hamming, flat-top |
| Measurements | 38 parameters with statistics, gating, zoom, history and reference — computed over all sampled points, up to 14 Mpts |
| Cursors | Manual and track, time and voltage |
| Counter | Hardware 6-digit, channel selectable |
| Pass/fail | Hardware-based, up to 40,000 decisions per second, 3.3 V TTL output |
| Display | 7-inch TFT-LCD, 800 × 480, 24-bit colour, 500:1, 300 nits · 8 × 14 divisions · 256-level intensity grading and colour-temperature mode |
| I/O | USB host · USB device (USB-TMC) · LAN · pass/fail · trigger out |
| Remote control | SCPI over VXI-11, Telnet (port 5024) and raw socket (port 5025) |
| Languages | English, German, French, Italian, Portuguese, Russian, Japanese, Korean, simplified and traditional Chinese |
| Power | 100–240 V 50/60 Hz or 100–120 V 400 Hz · 50 W max |
| Dimensions | 312 × 132.6 × 151 mm (L × W × H) |
| Weight | 2.6 kg net · 3.8 kg packed |
| Environment | 0 to +40 °C operating, −20 to +60 °C storage · 85% RH · to 3,000 m |
| Standards | EMC 2014/30/EU, IEC/EN 61326-1 · UL 61010-1 and UL 61010-2-030, CAN/CSA-C22.2 equivalents |
Software, PC tools and automation
LAN and USB-TMC are standard. The instrument answers SCPI over VXI-11, over Telnet on port 5024 and over a raw socket on port 5025, so a Python socket and a command string are enough to drive it — no vendor library required, and it drops into an existing test framework without special handling.
EasyScopeX gives you a remote front panel, screen capture and waveform and setup transfer from a PC, and a LabVIEW driver is published for the family. Both are in the downloads below, along with the note on reading the instrument’s binary waveform files if you post-process captures yourself.
The rear pass/fail line is a 3.3 V TTL output driven by the hardware mask comparator at up to 40,000 decisions per second, which is what makes this a credible instrument for a functional-test fixture and not only for a bench.
What is in the box
Ready to work out of the carton. Four probes, one per channel — not two, as on many four-channel instruments at this price.
| Item | Qty |
|---|---|
| SDS1104X-U oscilloscope | 1 |
| PP510 passive probes — 100 MHz, 1×/10×, 150 V / 300 V RMS CAT II, each with its accessory kit | 4 |
| Power cord | 1 |
| USB cable, type A to type B | 1 |
| Quick start guide, printed | 1 |
| Certificate of conformance | 1 |
Optional accessories
Everything Siglent list for this instrument, and everything we stock for it. Prices exclude VAT.
What this model cannot take
The SLA1016 16-channel logic probe module and the SAG1021I arbitrary waveform generator module are not supported on the SDS1104X-U, and neither is the Bode plot or browser control. There is no licence that adds them and no port to connect them to — the front panel has no Digital key and the rear has no Sbus connector. If you want any of that, buy the SDS1104X-E instead; it is €60 more and keeps that door open.
| Code | What it is | Price |
|---|---|---|
| SDS1X-E-RMK | 19-inch 4U rack shelf with front panel and handles. Siglent name the SDS1000X-U for this kit explicitly. | €125 |
| BAG-S1 | Soft carry case. Listed for the SDS1000X-E; the SDS1104X-U is the same 312 × 132.6 × 151 mm chassis, so it fits. | €59 |
| PP510 | Spare or extra 100 MHz 1×/10× passive probe — the one supplied with the instrument. | €16 |
| STB-3 | Demonstration and training board — square, sine, AM, fast edge, PWM, I²C, CAN and LIN sources. The natural companion in a teaching laboratory. | €189 |
| ISFEOUT OF STOCK | Isolated front end — two isolated channels, ±600 Vpk, floating to 1000 Vrms from earth and 2000 Vrms between the two, USB powered. ⚠ 1 MHz bandwidth: it buys isolation, not speed. | €121 |
| HPB4010 | 10 kV high-voltage probe, DC–40 MHz, 1:1000. | €459 |
| CP4020 | AC/DC current clamp, 60 A peak, 200 kHz — the entry point of the CP current-probe range. | €409 |
| DPB5150 | 70 MHz differential high-voltage probe, 1500 V, 50×/500×. | €825 |
STB-3 demo and training board
Known-good square, sine, AM, fast-edge, PWM, I²C, CAN and LIN signals — for teaching, and for proving an instrument is behaving.
BAG-S1 carry case
Padded soft case for the instrument, its four probes and its leads.
SDS1X-E-RMK rack shelf
19-inch, 4U, with handles — for building the instrument into a fixed test rack.
ISFE isolated front end
Two isolated channels, ±600 Vpk, floating to 1000 Vrms — but only 1 MHz of bandwidth. Currently out of stock; ask us for the lead time.
Differential high-voltage probes
For floating measurements the 400 Vpk inputs cannot make on their own — gate drives, DC buses, mains-referenced circuits.
Current probes
Clamp round a conductor and read amps without breaking the circuit. CP4000 and CP5000 series, 60 A to 500 A.
HPB4010 10 kV probe
DC to 40 MHz, 1:1000, for ignition, insulation and electrostatic work.
SDS1104X-E — the step up
Two acquisition memories rather than one: 500 MSa/s and 7 Mpts on all four channels, a 1 Mpts FFT, and MSO, AWG, Bode plot and web control available later.
Related and alternative models
The three instruments most people compare before buying this one. Prices exclude VAT.
| Model | Ch. | BW | With four channels on | What that buys | Price |
|---|---|---|---|---|---|
| SDS1104X-UTHIS PAGE | 4 | 100 MHz | 250 MSa/s · 3.5 Mpts/ch | Serial decode. No MSO, AWG, Bode or web control — ever. | €359 |
| SDS1104X-E | 4 | 100 MHz | 500 MSa/s · 7 Mpts/ch | Everything the X-U has, plus 1 Mpts FFT and the SLA1016, SAG1021I, Bode plot and web control as later options. | €419 |
| SDS1202X-E | 2 | 200 MHz | — (two channels) | Twice the bandwidth, half the channels. 1 GSa/s and 14 Mpts on one channel; no four-channel-only functions. | €339 |
The honest summary: for a single instrument on a working bench the SDS1104X-E is usually worth the extra €60, because it doubles both the sample rate and the record length with all four channels running and keeps the option path open. The SDS1104X-U is the right buy when the budget is fixed and the multiplier matters — a school equipping twelve benches saves €720 — or when you probe high-impedance nodes and want its lighter 11 pF input. Full comparison on the SDS1000X-U series page.
Manuals and downloads
Everything Siglent publish for this model. These links go to the factory download service, which always serves the current revision, so a bookmark here does not go stale when a document is reissued. The user manual and quick start guide are shared with the SDS1000X-E — that is correct, not a mislabelled file. There is no separate service manual for this model.
The official specification. Note that it publishes the maximum record length but not the per-channel split — that is in the user manual.
Shared with the SDS1000X-E, and the only document that prints the memory depth for two, three and four channels. See “Memory Depth”.
Unpacking, first power-up, front and rear panel layout and the safety notes.
The SCPI command set for the SDS1000, SDS2000X and SDS2000X-E families.
The binary waveform file format, for post-processing captures on a computer.
Specifications for the whole Siglent probe range, including the supplied PP510.
Which probe and accessories ship with which oscilloscope, as published by the factory.
Licences for the open-source components used in the instrument firmware.
Firmware and software
⚠ This model takes its own firmware image. SDS1000X-E firmware is a different build and must not be installed here — check the model on your front panel first.
The PC application: remote front panel, screen capture, waveform and setup transfer.
Instrument driver for the SDS1000, SDS2000X and SDS2000X-E families.
Older revisions and documents for every other Siglent instrument are on our downloads page, searchable by model number.
All downloadsQuestions we are asked
What sample rate do I actually get with all four channels on?
250 MSa/s per channel, with 3.5 Mpts of record each. The instrument has one acquisition memory and one converter, so both figures halve each time you double the number of active channels: 1 GSa/s and 14 Mpts on one channel, 500 MSa/s and 7 Mpts on two, 250 MSa/s and 3.5 Mpts on three or four. The headline “1 GSa/s, 14 Mpts” is the single-channel case. The sample-rate figures are in the data sheet; the record lengths are only in the user manual.
Is 250 MSa/s enough?
For most of what this instrument is bought for, yes. It is roughly ten samples per period at 25 MHz and about 25 samples per bit on a 10 MHz SPI bus. Where it becomes the limit is fast edges — if you are measuring a rise time near the 3.5 ns the front end can resolve, put that signal on its own channel and let it have the full 1 GSa/s.
Do I have to buy the serial decoding?
No. I²C, SPI, UART/RS-232, CAN and LIN triggering and decoding are included, with nothing to license and no hardware to add. It is the strongest single thing about this instrument at its price.
Can I add 16 digital channels or a signal generator later?
No. The SLA1016 logic module and the SAG1021I generator are not supported on this model, and neither is the Bode plot or browser control. There is no licence that adds them and no port to connect them to — the front panel has no Digital key and the rear has no Sbus connector. If any of that is in your plans, the instrument to buy is the SDS1104X-E.
How does it compare with the SDS1104X-E?
Same bandwidth, same four channels, same free serial decoding. The X-E has two acquisition memories rather than one, so it holds 500 MSa/s and 7 Mpts on all four channels; it also has a 1 Mpts FFT rather than 128 k, reaches 500 µV/div rather than 1 mV/div, and can take the options listed above. The X-U is €60 less and has one specification that is genuinely better — 11 pF of input capacitance against 17 pF, so it loads a high-impedance node less. Full comparison on the series page.
How high a voltage can I measure?
The inputs are rated 400 Vpk (DC + peak AC below 10 kHz) and the supplied PP510 probes are 150 V / 300 V RMS CAT II. Beyond that you need a differential probe from the DPB range, or the HPB4010 for high-voltage work. Never put a mains-referenced circuit directly on a scope input — all four probe grounds are joined inside the instrument.
Can I control it from a script?
Yes. LAN and USB-TMC are standard, with SCPI over VXI-11, Telnet on port 5024 and a raw socket on port 5025, so a Python socket and a command string are enough — no vendor library needed. EasyScopeX and a LabVIEW driver are in the downloads. There is no browser interface on this model.
Which probes are supplied?
Four PP510 probes, one per channel, each with its accessory kit. They are 100 MHz 1×/10× probes rated 150 V / 300 V RMS CAT II — matched to the instrument's bandwidth, so nothing extra is needed to start work.
What warranty and support does it come with?
Three years of manufacturer warranty, handled by us in the Netherlands as the official Siglent distributor for the European Union. We hold stock, and we can supply the instrument with an ISO or DKD/DAkkS calibration certificate if your quality system needs one.
Calibration, warranty and support
Three years of manufacturer warranty, handled by JRSE B.V. in Helmond, the Netherlands — the official Siglent distributor for the European Union. We hold EU stock, we ship quickly, and we can supply this instrument with an ISO or DKD/DAkkS calibration certificate if your quality system requires one. If you are unsure whether this model or the SDS1104X-E fits your work, ask us before you order and we will say plainly.
Specifications on this page are taken from Siglent’s official SDS1000X-U data sheet (Rev. DS010AH-E01A) and the SDS1000X-E & SDS1000X-U user manual (EN05B), and are published for guidance only. They are subject to change without notice, and errors and omissions are excepted. The manufacturer’s current data sheet is the definitive reference.