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Highlights
◉ 4-in-1 Multifunctional Design: Combines oscilloscope, spectrum analyzer, frequency response analyzer, and signal generator in one portable device, ideal for R&D, repair, and education.
◉ Compact & Portable: A5-sized front panel with foldable rear stand for easy desktop use and carrying.
◉ Large HD Touchscreen: 7" 1024×600 IPS touchscreen with smooth waveform display, zoom, 16-bit resolution, and adaptive trigger suppression for accurate signal capture in noisy environments.
◉ Comprehensive Safety Protection: Supports up to 400V high-voltage input with overvoltage protection, multi-stage isolation, burn protection, voltage regulation, and ESD suppression circuits.
◉ Fast Charging & Long Battery Life: Built-in 4000mAh battery with 18W QC fast charging; fully charges in about 2 hours for heavy use.
◉ High Performance: 1GSPS real-time sampling, 350MHz analog bandwidth (single channel), and 50,000 wfms/s waveform refresh rate.
The FNIRSI DPOS350P is a professional 4-channel digital oscilloscope with high bandwidth, high sampling rate, and advanced signal analysis capabilities. Featuring touchscreen control, intelligent triggering, and multiple measurement modes, it delivers accurate waveform analysis for electronic development, circuit debugging, electronic design, and industrial maintenance.
Features
- 4-in-1 Electronic Measurement Platform: The DPOS350P integrates a 350MHz digital oscilloscope, 50MHz signal generator, 200K~350MHz spectrum analyzer, and 50MHz frequency response analyzer, providing a complete solution for signal measurement and analysis.
- High-Speed Waveform Capture: Featuring 1GSPS real-time sampling rate, 350MHz analog bandwidth (single-channel mode), and 50,000 wfm/s waveform refresh rate, it captures fast-changing and low-probability transient signals with high accuracy.
- 7-Inch HD Touchscreen Display: The 1024×600 IPS touchscreen delivers clear waveform visualization with grayscale and color temperature modes, enabling efficient operation in different measurement conditions.
- Advanced Signal Generation & Analysis: The built-in 50MHz signal generator supports 14 standard waveforms and custom waveform output. The spectrum analyzer covers 200K~350MHz for EMI testing, RF signal analysis, and high-frequency measurements.
- 400V Protection & Fast Charging: Designed with 400V high-voltage input protection and QC18W fast charging, the DPOS350P provides safer operation and up to 2-hour full charging.
- Data Storage & USB Export: Supports storage of up to 500 waveform files and 90 screenshots, with USB data export for convenient waveform analysis and measurement documentation.
Specifications
Basic Parameters:
Power-on configuration
5 preset items
Charging requirements
QC18W - 12V/1.5A (Type-C)
Languages
Chinese / English / Russian / Portuguese
Battery specifications
3.7V, 8000mAh lithium battery
Screen technology
7" IPS Screen, 1024 x 600 pixels
Standby time
~3 hours
Total power consumption
10W
Charging time
Startup ≈ 5 Hours
Interaction mode
capacitive touch screen
Heat dissipation
Air cooling
Expansion interface
USB data port
Dimensions
190mm*128mm*37mm
Automatic shutdown
15 minutes ~ 1 hour / off
Firmware upgrade
Support .iso image upgrade
Oscilloscope Parameters:
Channels
2CH
Bandwidth
350MHz
Rise time
1ns
Max sampling rate
1GSa/s
Memory depth
47Kpts
Input impedance
1MΩ / 14PF
Time base range
5ns ~ 50s
Roll time base
50ms ~ 50s
Vertical sensitivity
2mV ~ 20V(1X)
Vertical range
16mV ~ 160V(1X)
DC accuracy
±2%
Time accuracy
±0.01%
Input coupling
DC / AC
Probe attenuation
1X / 10X / 100X
Hardware bandwidth limit
150M / 20M
High resolution mode
8bit ~ 16bit
Parameter measurements
12 types
Cursor measurement
Time, Period, Frequency, Level, Voltage
Trigger detection
Digital trigger
Trigger channel
CH1/CH2
Trigger mode
Auto / Single / Normal
Trigger edge
Rising edge / Falling edge
Trigger suppression
L1 ~ L3
Trigger level
Manual / Automatic 10% ~ 90%
Screenshot storage
90 pictures
Waveform storage
500 groups
Background grid
display / hide
Waveform movement
Coarse adjustment / Fine adjustment
Overvoltage protection
Withstand voltage 400V
Waveform brightness
Adjustable
Simple FFT display
✔
Digital fluorescence
✔
Color temperature display
✔
X-Y mode
✔
ZOOM time base
✔
One-key automatic adjustment
✔
One-key return to zero
✔
Data browser
✔
Signal Generator Parameters:
Waveform types
14 standard functions + captured waveform
Frequency
0 ~ 50MHz(sine wave only, other waveforms up to 10M/5M/3M)
Amplitude
0 ~ 5VPP
Offset
-2.5V ~ +2.5V
Duty cycle
0.1% ~ 99.9%
Frequency resolution
1Hz
Amplitude resolution
1mV
Offset resolution
1mV
Duty cycle resolution
0.1%
Customizable captured waveform
500 groups
Frequency Response Analyzer Parameters:
Excitation signal frequency
10Hz ~ 50MHz (Latest firmware)
Excitation signal amplitude
0 ~ 5VPP
Excitation signal offset
-2.5V ~ +2.5V
Excitation frequency count
20 ~ 500
Cursor measurement
Frequency / Gain / Phase
Operating mode
Single / Cyclic
System calibration
✔
Spectrum Analyzer Parameters:
Conversion method
FFT
FFT length
4K ~ 32K
Frequency range
200KHz ~ 350MHz
Level range
-60dBmV ~ +260dBmV
Cursor measurement
Frequency / Amplitude
Marking parameter
Maximum energy harmonic
Waterfall chart
✔
3D waterfall chart
✔
Automatic adjustment
✔
System calibration
✔
⚠ Special Precautions
- Both channel probe grounds must be connected to the same potential. Different ground potentials may cause short circuits and damage the oscilloscope.
- Maximum BNC input voltage: 400V (with 1X probe).
- Use the included charger only. Avoid USB or other equipment power sources.
- Use 100X/1000X probes for high-voltage and high-frequency measurements.
Package List:
◉ DPOS350P Host *1
◉ QC18W Fast Charger *1 (US or EU Plug)
◉ 350MHz Probe *2
◉ Storage Bag *1
◉ Alligator Clip *1
◉ USB Data Cable *1
◉ User Manual *1
◉ Packing Box *1
◉ QC18W Fast Charger *1 (US or EU Plug)
◉ 350MHz Probe *2
◉ Storage Bag *1
◉ Alligator Clip *1
◉ USB Data Cable *1
◉ User Manual *1
◉ Packing Box *1
Using Environment and Precautions
The device should be stored in a soft case, and the operating environment should be at a temperature of -5~40℃, and the relative humidity should not exceed 80%.
The device should be stored in a clean and dry place to avoid moisture, mold, heavy pressure, mechanical damage,humidity and direct sunlight.
Avoid using in the rain or fog, avoid dropping or shocking.
When the screen on the LCD does not light up, it indicates that the voltage is too low, and it needs to be charged in time.
Copyrights
The product specifications are subject to change without notice, allfinal interpretation rights were reserved by FNIRSI Technology Co., Ltd, All trademarks, product images, technical parameters are properties of FNIRSI Technology Co.. Ltd. All rights reserved.
Warranty
30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from fnirsi.com), lifetime technique support by FNIRSI.
Please feel free to reach us with any concerns:
Email: service@fnirsi.com / info@fnirsi.com
We strive to reply to you within 24 hours.
FNIRSI has started researching and development manufacturer of quality optical products including Golf rangefinder, laser,measure device and binoculars since 2016.
Focus on the development,researching, and manufacturing for over 8 years.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.
At Fnirsi, we are committed to providing our customers with the best value for their purchases. To ensure you always get the best price, we offer a 30-day price guarantee on all products purchased directly from fnirsi.com. This policy aims to give you confidence and peace of mind when shopping with us.
What is the 30-Day Price Guarantee?
Our 30-day price guarantee means that if you purchase a product from fnirsi.com and the price of that product drops within 30 days of your purchase date, you are eligible for a refund of the price difference of the products. (Prices are based on USD. No refunds will be given for price changes in other currencies due to exchange rate fluctuations.)
How Does the Price Guarantee Apply?
- Eligibility: The price guarantee applies only to purchases made on fnirsi.com. Products purchased from other retailers or third-party sellers are not eligible.
- Timeframe: The price drop must occur within 30 days of your original purchase date.
- Product Match: The price guarantee applies to the same product (identical model, specifications, and condition).
How to Apply for a Price Difference Refund
If you notice that the price of a product you purchased from fnirsi.com has dropped within 30 days, follow these steps to apply for a refund of the price difference:
- Documentation: Prepare your order number and proof of the price drop (such as a screenshot and link to the product page showing the reduced price).
- Contact Us: Reach out to our customer support team at info@fnirsi.com .Include your order number, proof of the price drop, and a brief explanation of your request.
- Verification: Our team will verify the price drop and your purchase details.
- Refund Process: Once verified, we will process the refund for the price difference to your original method of payment. It typically takes 1-3 business days for you to receive the refund.
At Fnirsi, we strive to provide our customers with high-quality products and exceptional customer service. Our 30-day price guarantee is just one of the ways we ensure you get the best value for your investment. Shop confidently with Fnirsi, knowing that you are always getting the best deal available.
Thank you for choosing Fnirsi. If you have any questions or need further assistance, please do not hesitate to contact our customer support team at info@fnirsi.com.
R
I purchased this tablet for some research projects with infrasound and environmental ELF/VLF and portable for field research as well. The high-end specs are impressive, but to my dismay the range of Freq. Response 100Hz-50Hz and Spectrum analyzer is 200KHz-350MHz. Also it does not do SCPI for those that like to automate their test equipment. And the 350MHz is for one probe otherwise it is shared, so 150MHz each channel. As far as the good things, there's lot to love! I am impressed how fast this scope comes up, it's faster than my 4-channel scope in my lab, I like the crisp display. The manufacturing is tight, I might not be able to use it for my intended purposes, but it is a great scope to add to my instruments, a good purchase. Okay if someone reads this comment maybe there's something in firmware you guys can tweak for "Low Frequency" because I'm sure your instrument can handle things under 50Khz or even 25KHz, Please let me know if you can add a feature, I'm sure there are tradeoffs and that is why you did the ranges you did. ELF/VLF isn't very common of a need.
G
The DPOS 350P that I recently purchased from FNIRSI is a very successful product, robust, with a large screen, many functions, easy to operate, built from quality materials and yes I am delighted with this purchase, thank you to the FNIRSI team. I highly recommend purchasing this product.
K
FNIRSI® DPOS350P 4-IN-1 350MHz 1GSPS Tablet Oscilloscope Signal Generator Spectrum Analyzer Frequency Response Analyzer
L
Pros: The instruments working well. It is wery integrated and usefull tool. Compared to a high quality scope, the waveforms and measurement it is the same.
Cons: Too less measurements. Example fall and rise time of a signal is missing. The math functions of the two channels is missing. These are the matter of firmware only. No application or PC software available. The signal generator is a limited one (Ex. 50MHz is only for sine wave).
X
Battery not lasting long. Excellent oscilloscope and good price!
A
I was a little skeptical before buying it, I thought it wouldn't show me what I wanted, but now for once I'm very satisfied.
h
I have tested it here:
https://youtu.be/iZb85biYO3c?is=zLwEA5fGKiw3DFIF
I
На вашем сайте нету опций перейти на язык удобный для общения было бы хорошо если бы вы установили такую опцию сервис компании хорош
B
Great scope! Recommendations for future updates:
Audio Filter: Add a 20kHz bandwidth limit to remove high-frequency noise from audio signals.
DC Precision: Improve vertical resolution for millivolt DC measurements (crucial for Amp Bias/Offset).
FFT Resolution: Higher resolution for the Spectrum Analyzer to better detect THD and harmonics.
Stable Roll Mode: Better for monitoring thermal drift over time.
F
It's a very nice tool it's almost proffesional with dirt cheap price. The portability makes it a very powerful useful tool.
A
The FNIRSI 4in1 DSO was perfectly delivered with a matching bag and all add-ons and probes delivered! It already measured fine when HF transmitters were tested in the Spectrum Analyzer. It is quite heavy because of the internal 8Ah fast chargeable battery but still very portable for field work.
J
FNIRSI® DPOS350P 4-IN-1 350MHz 1GSPS Tablet Oscilloscope Signal Generator Spectrum Analyzer Frequency Response Analyzer
F
Strumento veramente valido e completo con ottimo rapporto qualità prezzo. Confrontato misure anche con strumenti professionali è risultato molto preciso . Good good good
B
A very convenient instrument for field work. It does have a battery with somewhat too little capacity for longer use, but that has to be taken into account; on the other hand, the instrument is small and portable. The display is large enough, and the 16-bit resolution (at which the stated 350 MHz is significantly reduced) is clearly noticeable in the image sharpness. You also need to keep in mind that the 350 MHz is specified with only one channel enabled (it is halved when two are used) and at 8-bit signal sampling. Nevertheless, it remains an excellent instrument for me.
T
Works very well. I try oscilloscope and signal generator and they works perfect. Good well build scope
D
Lo strumento si presenta molto accattivante e completo di caricatore cavi e sonde, è davvero pratico e ideale per misure semplici sul campo il rapporto prestazioni/prezzo è davvero insuperabile!
J
Compact and easy to
A
Долго выбирал осциллограф, в основном у местных магазинов или на aliexpress, цены там больше на 50-100 евро, хорошо что посмотрел цену на официальном сайте. Так же смотрел варианты осциллографов планшетного типа, не нашел конкурентов за такую цену. Норм начинаются от 380 евро и более. Есть свои нюансы которые нужно изучить перед покупкой, в особенности если вам важно в спектральном анализаторе видеть частоту ниже 100 мГц то он вам не подойдет.
A
Very good oszilloscope. Many interesting Features other oszilloscopes do not have. But beware of the delivery time: 10 weeks+ from order to shipment are inacceptible.
D
3rd piece of test equipment had from this company.
Just wish they did a dedicated bench DVM. Not with all bells and whistles like oscilloscope etc, just a good dvm.
K
I have not used it extensively yet, but all looks good so far. The only thing to mention is that I do not see the math function (e.g. CH1 - CH2) to better look at differential signals. That would be a great feature to add.
G
EXCELLENT PRODUIT EN RAPPORT QUALITE ET PRIX. ADAPTE AU BESOIN
DU LABORATOIRE (mesure RF, analyse, recherche panne, réglage, étalonnage). Ventilateur un peu bruyant, tres bien emballé, livraison propre, valisette adaptée.
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