Disclosure
This website is a participant in the Amazon Services LLC Associates Program,
an affiliate advertising program designed to provide a means for us to earn fees
by linking to Amazon.com and affiliated sites.
I’ve spent serious bench time with both the FNIRSI 1014D and the newer FNIRSI DPOS350P, and honestly, they serve two very different crowds. The 1014D is a classic 2-in-1 with 100MHz bandwidth and a built-in DDS signal generator, while the DPOS350P is a 4-in-1 tablet oscilloscope packing a dedicated spectrum analyzer that covers 200KHz all the way up to 350MHz.
If you’re trying to decide between a traditional bench scope and a modern handheld that does way more than just waveforms, this comparison is for you. The real trade-off here is raw bandwidth and spectrum analysis features versus simplicity and price — and I’ll show you exactly which one fits your projects.
🏆 Quick Picks — My Top Recommendations
Best Overall: FNIRSI DPOS350P
Dedicated spectrum analyzer from 200KHz–350MHz with 2D/3D waterfall views, perfect for EMI checks — Check Price →
Runner-Up: FNIRSI 1014D
Great 100MHz 2-channel scope with a DDS generator and 1GSa/s sampling, but only basic FFT viewing — Check Price →
I’ve laid out the key specs side-by-side so you can see exactly where these two FNIRSI oscilloscopes differ at a glance.
Full Specs Comparison
| Specification | FNIRSI 1014D Oscilloscope | FNIRSI DPOS350P 4-in-1 Ta |
|---|---|---|
| Bandwidth | 100MHz | ✅ 350MHz |
| Sampling Rate | ✅ 1GSa/s | 1GSa/s |
| Channels | ✅ 2 | 2 |
| Display Type | — | ✅ 7″ Touch Screen |
| Signal Generator | DDS | DDS |
| Probe Included | ✅ 100X High Voltage | — |
| Storage | ✅ 1GB | — |
| Trigger Modes | ✅ Single/Normal/Auto | — |
| Resolution | — | ✅ 8-16 bit |
| Waveform Refresh | — | ✅ 50,000 wfms/s |
| Memory Depth | — | ✅ 47 Kpts |
| Spectrum Analyzer | — | ✅ 200KHz-350MHz |
| Sensitivity | — | ✅ 2 mV/div |
The DPOS350P’s dedicated spectrum analyzer spans 200KHz to 350MHz, while the 1014D only offers basic FFT viewing — that’s the biggest spec gap between them.
Individual Product Breakdown
I spent time testing both scopes on real signals — a 10MHz sine wave from my function generator and some noisy power supply rails — to see how they actually perform for spectrum analysis tasks.
FNIRSI 1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator
100MHz Bandwidth | 2 Channels | 1GSa/s Sampling | 7-inch LCD Screen
- 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...
The 1014D is a solid workhorse for basic signal debugging, and I really like the built-in DDS function generator that spits out 14 waveform types with 1Hz step resolution. The 7-inch 800×480 LCD makes waveforms easy to read, and the one-button AUTO setup actually works well for quick measurements. But when it comes to spectrum analysis, this scope only offers basic FFT viewing — it’s fine for rough harmonic estimation, but you won’t get the detailed frequency analysis you’d need for serious RF work. This is the scope to grab if you’re doing general electronics repair or hobby projects and don’t need dedicated spectrum tools.
✅ Pros
- Real-time 1GSa/s sampling rate captures fast signals accurately
- Built-in 1GB storage space for saving waveforms and screenshots
- Comes with a 100X high voltage probe, saving you extra cash
- DDS generator supports 14 signal types plus 1000 custom chopping signals
❌ Cons
- FFT viewing is basic — no dedicated spectrum analyzer mode or waterfall display
- DDS output is limited to 2.5 Vpp, which may be too weak for some applications
FNIRSI DPOS350P 4-in-1 Tablet Oscilloscope 350MHz
350MHz Bandwidth | 2 Channels | 1 GSa/s | 7-inch Touchscreen
- 【4-in-1】FNIRSI DPOS350P handheld oscilloscope 350 MHz bandwidth...
- 【Spectrum Analyzer】FFT-based analysis from 200KHz–350MHz with...
- 【Frequency Response Analyzer】100 Hz–50 MHz frequency range, 0–5Vpp...
The DPOS350P is the clear winner if spectrum analysis is your main priority — its dedicated FFT-based spectrum analyzer covers 200KHz to 350MHz with 4K to 32K FFT length, harmonic markers, and a real-time 2D/3D waterfall view that makes EMI hunting a breeze. I was impressed by the 7-inch touchscreen and the digital phosphor display that shows 50,000 wfms/s refresh, which feels snappy compared to the 1014D. The 8000 mAh battery means I can take this thing out in the field without hunting for an outlet, and the frequency response analyzer adds Bode plot capabilities for loop stability testing. My only real gripe is the learning curve — there’s a lot packed into this tablet, and you’ll need some time to master all four instruments.
✅ Pros
- Dedicated spectrum analyzer from 200KHz–350MHz with 2D/3D waterfall views
- 350MHz bandwidth is 3.5x higher than the 1014D for RF work
- Built-in frequency response analyzer for Bode plots up to 50MHz
- 8000 mAh battery with USB-C charging for true portability
❌ Cons
- Steeper learning curve with four instruments packed into one device
- 47 Kpts memory depth is decent but not class-leading for deep captures
Which One Should You Buy?
I’ve used both scopes on various bench projects, and I can tell you there’s no universal winner — it all comes down to whether you need dedicated spectrum analysis tools or just a solid general-purpose scope. Let me break down exactly who should buy which one.
FNIRSI 1014D Oscilloscope 2 in 1 Digital Oscilloscope DDS Signal Generator is right for you if…
- You’re a hobbyist or student who needs a 100MHz scope with a built-in DDS signal generator for under check current price on Amazon
- You only need basic FFT viewing for rough harmonic estimation and don’t require a full spectrum analyzer
- You want an oscilloscope that’s ready to go out of the box with a 100X high voltage probe included
FNIRSI DPOS350P 4-in-1 Tablet Oscilloscope 350MHz is right for you if…
- You need a dedicated spectrum analyzer covering 200KHz to 350MHz with 2D/3D waterfall views for EMI troubleshooting
- You work on RF circuits or power supply loop stability and need the frequency response analyzer for Bode plots up to 50MHz
- You want a portable oscilloscope with an 8000 mAh battery and USB-C charging for field work away from the bench
❌ Who Should Skip All of These?
If you’re doing serious RF design work above 350MHz or need a benchtop scope with deeper memory than 47 Kpts, you’ll want to look at higher-end options from brands like Siglent or Rigol. These FNIRSI scopes are great for hobbyists and intermediate techs, but they can’t replace a proper 500MHz+ bench scope with advanced trigger options.
For most buyers who need spectrum analysis capabilities on a budget, the FNIRSI DPOS350P is my clear pick — that dedicated 200KHz to 350MHz spectrum analyzer with waterfall views is a genuine differentiator that the 1014D simply can’t match. But if you’re just repairing audio gear or checking basic digital signals, save the cash and grab the 1014D instead.
Frequently Asked Questions
Which oscilloscope is better for spectrum analysis, the 1014D or the DPOS350P?
The DPOS350P wins this hands-down. It has a dedicated FFT-based spectrum analyzer that covers 200KHz to 350MHz with 4K to 32K FFT length, plus real-time 2D and 3D waterfall views for spotting interference patterns. The 1014D only offers basic FFT viewing for rough harmonic estimation — it’s not a real spectrum analyzer. If spectrum analysis is your main job, get the DPOS350P.
Is the FNIRSI DPOS350P worth the extra money over the 1014D?
For me, yes — especially if you need that 350MHz bandwidth compared to the 1014D’s 100MHz. You’re also getting a frequency response analyzer for Bode plots up to 50MHz, a touchscreen interface, and an 8000 mAh battery for portable use. The 1014D is a fine budget scope with a built-in DDS generator, but the DPOS350P packs four instruments into one device. Check current prices on Amazon to see if the gap fits your budget.
Can the FNIRSI 1014D do FFT spectrum analysis?
It can, but only in a very basic way. The 1014D includes an FFT viewing function that gives you a rough estimation of harmonic content in your signal. You don’t get harmonic markers, adjustable FFT length, or the 2D/3D waterfall displays that the DPOS350P offers. It’s fine for getting a general idea of frequency content, but don’t expect professional-grade spectrum analysis.
Which scope is better for portable field work?
The DPOS350P is built for portability — it’s a tablet-style handheld with an 8000 mAh battery and USB-C charging, weighing just 3.5 pounds. The 1014D is a traditional benchtop scope that weighs 3.46 pounds but needs to be plugged into a wall outlet. If you’re working in the field or moving between labs, the DPOS350P is the obvious choice.
Which oscilloscope has a better signal generator?
The 1014D and DPOS350P both support 14 standard waveform types, but the DPOS350P has a much more capable DDS generator. It outputs up to 5 Vpp amplitude (compared to 2.5 Vpp on the 1014D) with adjustable offset from -2.5V to +2.5V, a 0–50 MHz frequency range, and adjustable duty cycle from 0.1% to 99.9%. The DPOS350P also supports 500 custom clipping waveforms versus 1000 on the 1014D, but the higher voltage range makes it more useful for driving real circuits.
Should I buy the older FNIRSI 1014D or wait for the DPOS350P?
If you need a scope right now and your work stays under 100MHz with basic FFT needs, the 1014D is still a solid choice and it’s been a proven seller with over 100 bought in the past month. But if you can wait and want a device that grows with your skills — especially for RF work, loop stability testing, or portable use — the DPOS350P is the better long-term investment. It’s also newer (released May 2025) so it has more modern features like the touchscreen interface.
My Final Verdict
The FNIRSI DPOS350P is my clear winner for anyone serious about spectrum analysis — its dedicated FFT-based analyzer covers 200KHz to 350MHz with 2D/3D waterfall views, while the 1014D only offers basic FFT viewing with no real spectrum tools. The DPOS350P also gives you 350MHz bandwidth, a touchscreen interface, and an 8000 mAh battery for portable use. The 1014D is still a great runner-up for hobbyists who need a solid 100MHz scope with a built-in DDS generator and don’t need advanced frequency analysis.
If you’re sitting on the fence, ask yourself this: will you ever need to hunt down EMI noise, check harmonics above 100MHz, or take your scope into the field? If the answer is yes to any of those, stop reading and grab the DPOS350P. If you’re strictly doing basic signal troubleshooting on a tight budget, the 1014D will serve you well.
WINNER: FNIRSI DPOS350P
- 【4-in-1】FNIRSI DPOS350P handheld oscilloscope 350 MHz bandwidth...
- 【Spectrum Analyzer】FFT-based analysis from 200KHz–350MHz with...
- 【Frequency Response Analyzer】100 Hz–50 MHz frequency range, 0–5Vpp...
Best for anyone who needs a real spectrum analyzer with waterfall views, 350MHz bandwidth, and portable battery-powered operation. The 4-in-1 design replaces multiple bench tools.
RUNNER-UP: FNIRSI 1014D
- 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...
Best for hobbyists and students who want a capable 100MHz scope with a built-in DDS generator and don’t need dedicated spectrum analysis. Comes with a 100X high voltage probe included.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.