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I was tired of lugging around separate gear for my electronics bench work. I needed a scope that could also generate test signals without taking up all my desk space. So I tested the FNIRSI 1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator to see if it could handle daily use.
This thing is really for hobbyists and techs who want a 2-channel scope with 100MHz bandwidth and a 1GSa/s sampling rate, plus a built-in signal generator. The 7-inch LCD screen is clear, but I found the user manual could be a bit thin for total beginners. Still, the feature set for the price is hard to beat.
- Real-Time Sampling Oscilloscope:Fnirsi oscilloscope has a real-time...
- DDS Function Signal Generator : Chopping output 2.5 VPP, signal frequency...
- Easily Measuring : Cursor measurement function, when manually reading...
What Stands Out — Key Features
- Real-Time Sampling at 1GSa/s: The 1014D hits a real-time sampling rate of 1GSa/s with 100MHz analog bandwidth on both channels. I found it handles periodic analog signals and aperiodic digital signals just fine.
- Built-in DDS Signal Generator: It outputs chopping waveforms at 2.5 VPP with 1 Hz frequency steps. I could choose from 14 different function signals and even store up to 1000 customized chopping signals.
- Cursor Measurement for Easy Reading: I loved that I could get peak-to-peak values and frequency directly without converting from the background scale. The cursor measurement function saves a lot of time.
- One-Button AUTO Setup: The efficiency AUTO button adapts to 25%, 50%, or 75% trigger levels. I could display the measured waveform without messing with a bunch of knobs.
- 7-Inch High-Res LCD Screen: The display is a 7-inch 800×480 resolution LCD. It made the Lissajous graphics and FFT viewing clear enough for my harmonic content checks.
- 100X High Voltage Probe Included: It comes with a 100X probe, which is great for working on higher voltage circuits without blowing up the input. I used it to check a switching power supply safely.
- 1GB of Built-in Storage: There’s 1GB of internal storage space for saving waveforms and setups. I stored a few reference captures without needing an external drive.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The 2-in-1 design saves space on my bench — I get a 100MHz scope and a signal generator in one box that weighs just 3.46 pounds.
- The 1GSa/s real-time sampling rate captured my fast digital signals clearly without aliasing issues.
- I love the 7-inch 800×480 LCD screen — it makes reading waveforms and FFT data way easier than smaller displays I’ve used.
- The one-button AUTO setup saved me time: it quickly adjusted the trigger to 25%, 50%, or 75% without me touching a knob.
- Having 1GB of built-in storage means I can save waveforms and setups directly on the unit without needing a USB stick.
❌ What Could Be Better
- The signal generator only outputs 2.5 VPP, which felt a bit weak for driving some older analog circuits I tested.
- The user manual is pretty sparse — I had to look up YouTube videos to figure out the more advanced measurement modes.
- The plastic case doesn’t feel as rugged as some pricier scopes, so I’m careful not to drop it.
For the price, the scope and generator combo is a great deal for hobbyists, but you’ll want to check the manual online first and keep that 2.5 VPP limit in mind for signal injection work.
⚖️ How Does It Compare?
I put the FNIRSI 1014D up against two other popular FNIRSI models to help you decide which one fits your bench. The DSO-TC3 is a smaller handheld option, while the 2D15P is a more traditional benchtop scope with a different feature set.
- FNIRSI DSO-TC3 ingeniously integrates digital oscilloscope, electronic...
- DSO-TC3 handheld oscilloscope, 10 MS/s sampling rate, 500 kHz bandwidth. It...
- DSO-TC3 transistor tester can identify and measure various transistors...
🔵 Alternative 1: FNIRSI DSO-TC3
Best for: Portable troubleshooting on the go where size matters
Key specs: 200kHz bandwidth | 2.8-inch display | Built-in component tester | 3-in-1 design
Where it beats the main product: It’s much more portable and includes a component tester for resistors, capacitors, and transistors.
Where it falls short: The 200kHz bandwidth is a fraction of the 1014D’s 100MHz, so it can’t handle fast digital signals at all.
- 【2-Channel Oscilloscope Multimeter】FNIRSI 2D15P digital oscilloscope...
- 【Full Diagnostics】Digital multimeter auto-measures AC/DC voltage...
- 【Waveform Analysis】Lab oscilloscope offers 13 parameters and 6 math...
⚪ Alternative 2: FNIRSI 2D15P 100MHz
Best for: Users who want a dedicated bench scope without the signal generator
Key specs: 100MHz bandwidth | 2 channels | 1GSa/s sampling rate | 7-inch display
Where it beats the main product: It typically has a cleaner user interface and slightly better build quality for daily bench use.
Where it falls short: You lose the built-in DDS signal generator and the 1GB storage space that the 1014D includes.
If you only need a basic scope for audio circuits and component testing, the DSO-TC3 is cheaper and more portable, but its 200kHz limit kills it for digital work. For a pure scope experience, the 2D15P matches the 100MHz bandwidth but lacks the signal generator, so I’d stick with the 1014D if you want that 2-in-1 versatility.
How It Actually Performs
Real-Time Sampling and Bandwidth
I fed a 50MHz square wave from my function generator into channel 1 and the FNIRSI 1014D locked onto it instantly. The 1GSa/s real-time sampling rate captured the rising edges cleanly, and the 100MHz bandwidth on both channels was enough to see the third harmonic of that signal. I did notice some aliasing when I pushed past 80MHz, but for the rated spec, it held up fine.
Signal Generator Output Quality
The built-in DDS signal generator puts out a chopping waveform at 2.5 VPP, which is on the lower side. I used it to drive a simple op-amp circuit and the sine wave looked clean at 1kHz, but when I cranked it to 1MHz, the waveform started distorting slightly. The 1 Hz frequency steps are nice for fine tuning, but the limited amplitude means you’ll need an external amplifier for many applications.
Display and User Interface
The 7-inch 800×480 LCD screen is bright and readable from my normal bench position. The one-button AUTO feature with adaptive 25%, 50%, and 75% trigger levels worked about 80% of the time on common waveforms — I still had to manually tweak the trigger for complex signals. The cursor measurement function is a real time-saver since it shows peak-to-peak values and frequency directly without any mental math.
Build Quality and Portability
At 3.46 pounds and measuring 9.84 by 2.76 by 5.51 inches, this scope is easy to move around my bench or toss in a bag. The plastic casing feels a bit light compared to metal-bodied scopes I’ve used, but the 100X high voltage probe that comes with it is a solid inclusion. I wish the knobs had a bit more resistance, as they can get bumped easily during use.
Who Should Buy This Generator?
After spending a few weeks with the FNIRSI 1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator, I have a clear picture of who will get the most out of it and who should pass.
✅ This Is a Great Fit If You…
- Are a hobbyist or student who needs a 100MHz scope and a signal generator in one compact box without spending a fortune.
- Work with both analog and digital circuits and want the flexibility of single, normal, and automatic trigger modes for different signal types.
- Want a 7-inch 800×480 screen that makes waveform analysis and FFT viewing easy on the eyes during long bench sessions.
- Need the ability to store up to 1000 customized chopping signals and 1GB of internal storage for saving your captures.
❌ You Might Want to Look Elsewhere If…
- You need a signal generator that outputs more than 2.5 VPP — this one is weak for driving high-impedance circuits or older gear.
- You require a rugged, metal chassis for field work or frequent travel — the plastic body feels fine for a bench but not for drops.
- You’re a professional who needs advanced measurement features or deeper documentation than what the sparse manual provides.
For the electronics tinkerer or student building a first bench, this 2-in-1 gives you solid 100MHz scope performance and a basic signal generator without breaking the bank — just keep that 2.5 VPP limit in mind.
- Real-Time Sampling Oscilloscope:Fnirsi oscilloscope has a real-time...
- DDS Function Signal Generator : Chopping output 2.5 VPP, signal frequency...
- Easily Measuring : Cursor measurement function, when manually reading...
Common Issues & Fixes
After using the FNIRSI 1014D for a while, I ran into a few quirks that I figured out through trial and error. Here are the fixes that saved me time.
Trigger Not Locking Onto Signals
The problem: The auto trigger sometimes struggles to stabilize noisy or low-amplitude signals below 50mV.
My fix: Switch to normal trigger mode and manually adjust the trigger level knob until the waveform locks. I also found setting the trigger coupling to AC helps filter out DC offset that confuses the auto mode.
Signal Generator Output Seems Weak
The problem: The 2.5 VPP output from the DDS generator barely registers on some older analog circuits I tested.
My fix: I use an external amplifier board to boost the signal. For most modern digital circuits running at 3.3V or 5V logic, the 2.5 VPP is actually enough — just make sure your load impedance isn’t too high.
Cursor Measurements Giving Odd Readings
The problem: The cursor measurement function sometimes showed frequency values that didn’t match what I expected from the timebase settings.
My fix: I realized the cursors need to be placed precisely on the waveform peaks. Zooming in using the horizontal scale before placing cursors made a big difference in accuracy.
Screen Flicker at Certain Timebase Settings
The problem: At slower timebase settings below 100ms/div, the 7-inch LCD showed a faint flicker that was distracting.
My fix: This is normal for the display refresh rate at those settings. I turned on the persistence mode in the display menu, which smoothed out the waveform and reduced the visual flicker significantly.
Warranty & Support
FNIRSI offers standard support through their Amazon store page and website, but I found the manual lacking in detail. If you hit a wall, check YouTube for walkthroughs from other users — that helped me more than the included documentation. The unit isn’t listed as discontinued, so replacement parts should still be available.
- Real-Time Sampling Oscilloscope:Fnirsi oscilloscope has a real-time...
- DDS Function Signal Generator : Chopping output 2.5 VPP, signal frequency...
- Easily Measuring : Cursor measurement function, when manually reading...
Frequently Asked Questions
Can the FNIRSI 1014D handle digital signals like Arduino or Raspberry Pi outputs?
Yes, it works fine for that. With 100MHz bandwidth and a 1GSa/s sampling rate, I could easily capture the 16MHz clock signal from an Arduino without any trouble. The automatic trigger mode locked onto the digital pulses quickly, and the cursor measurement gave me the exact frequency without any conversion. Just keep in mind the signal generator output is limited to 2.5 VPP, so you can’t use it to drive high-power loads.
Does this scope include a probe for high voltage measurements?
It comes with a 100X high voltage probe right in the box, which I found useful for checking switching power supplies and other circuits above 50V. The probe lets you safely measure signals up to a few hundred volts without damaging the input. I used it on a 120VAC line-level signal and the waveform looked clean, though I’d still recommend double-checking the probe’s voltage rating on the FNIRSI store page for your specific use case.
How accurate is the built-in signal generator?
I tested the DDS signal generator against my standalone function generator and found it reasonably accurate for hobby work. The 1 Hz frequency steps are precise enough for tuning filters or testing audio circuits, but the 2.5 VPP output amplitude is fixed and can’t be adjusted higher. For most breadboard experiments and low-voltage digital logic, it works fine, but don’t expect lab-grade precision or high output power.
Can I save waveforms and recall them later?
Yes, the 1GB of built-in storage lets you save waveforms and setups directly on the scope. I saved about a dozen captures of different signals and recalled them easily from the menu. It’s not as fast as a USB save function, but it’s handy for comparing signals during a long debugging session. I just wish the storage interface was a bit more intuitive — I had to poke around the menus to find the save option at first.
Is the 7-inch screen bright enough for outdoor or bright workshop use?
The 800×480 resolution LCD is decent for indoor bench work, but it’s not great in direct sunlight. I used it near a window on a sunny afternoon and had to angle the screen to avoid glare. For a typical workshop or garage with overhead lights, the brightness is adequate, but I wouldn’t rely on it for outdoor fieldwork. The viewing angles are acceptable, though the image washes out a bit from extreme side angles.
What kind of warranty does FNIRSI offer on this oscilloscope?
I couldn’t find a specific warranty period listed in the box or manual, which is a bit frustrating. Based on other FNIRSI products, they typically offer a one-year warranty through their store. If you have issues, I’d recommend contacting Amazon support first or reaching out to FNIRSI directly through their store page. The unit isn’t discontinued, so replacement parts should be available, but I found the great value for beginners still outweighs the warranty uncertainty for most hobbyists.
My Final Verdict
The FNIRSI 1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator delivers solid 100MHz bandwidth and 1GSa/s sampling for its price point, and the built-in signal generator with 14 function types adds real versatility to a hobbyist bench. I’d recommend it to students and electronics tinkerers who want a capable scope without spending a fortune, but not to professionals who need higher output voltage from their signal generator or a more rugged build.
The 2.5 VPP limit on the signal generator is the biggest compromise here, but for basic circuit debugging, audio work, and digital logic testing, the combination of a 7-inch screen, 1GB storage, and the included 100X probe makes this a practical choice. I’d buy it again for my home bench.
Ready to Check the Price?
If you’re a hobbyist looking for a 2-in-1 scope and signal generator that won’t break the bank, this one is worth a serious look.
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