Full technical review FNIRSI DPOS350P 4-IN-1

Product Introduction

The FNIRSI DPOS350P 4-IN-1 Tool is a revolutionary portable device designed to consolidate multiple essential electronic testing and measurement functions into a single, compact unit. It addresses the common problem of needing separate instruments for various tasks, offering an oscilloscope, spectrum analyzer, signal generator, and frequency response analyzer in one. Its uniqueness lies in this comprehensive integration, combined with a responsive touchscreen and multi-language support, making it an ideal solution for electronics hobbyists, professional engineers, and educational institutions working on diverse projects from circuit debugging to RF signal analysis. Check out our other technical reviews for more hardware testing.

FULL TECHNICAL REVIEW FNIRSI DPOS350P 4-IN-1 Tool, Color Temperature Display, Touchscreen, Support 4 Languages 5 | andibond.com

Hardware specifications

Core Specifications: FNIRSI DPOS350P 4-IN-1

Brand Name: FNIRSI
Origin: Mainland China
Certification: CE, WEEE
Power Source: Battery (Included)
Channels: 2 CH
Bandwidth: 350MHz
Max Sampling Rate: 1GSa/s
Memory Depth: 47Kpts
Rise Time: 1ns
High Resolution Mode: 8bit ~ 16bit
Input Impedance: 1MΩ / 14PF
Vertical Sensitivity: 2mV ~ 20V (1X)
Time Base Range: 5ns ~ 50s
Roll Time Base: 50ms ~ 50s
Screen Size: 7 inches
Screen Resolution: 1024 x 600 pixels
Screen Technology: IPS full viewing angle
Interaction Mode: Capacitive touchscreen
Battery Specifications: 3.7V, 8000mAh lithium battery
Charging Requirements: QC18W — 12V/1.5A
Charging Time: 3 hours (fast charge), approx. 5 hours (standby)
Standby Time: About 3 hours (operating)
Total Power Consumption: 10W
Heat Dissipation: Air cooling
Product Size: 190mm*128mm*37mm
Languages: Chinese / English / Russian / Portuguese
Expansion Interface: USB data port
Firmware Upgrade: Support .iso image upgrade
Overvoltage Protection: Withstand voltage 400V
Signal Generator Frequency: 0 ~ 50MHz (sine wave only, others up to 10M/5M/3M)
Frequency Response Analyzer Frequency: 100Hz ~ 50MHz
Spectrum Analyzer Frequency Range: 200KHz ~ 350MHz
Data Storage: 1GB (90 images, 500 waveforms)

Available Versions

Available Versions & Selection Guide

The FNIRSI 350P is available in two main versions, primarily differing by regional power plug standards:

— DPOS350P-EU: European standard version.
— DPOS350P-US: US standard version.

FULL TECHNICAL REVIEW FNIRSI DPOS350P 4-IN-1 Tool, Color Temperature Display, Touchscreen, Support 4 Languages 8 | andibond.com

Package Contents

What’s in the Box?

DPOS350P host*1
Packaging box*1
User manual*1
350MHz probe*2
USB data cable*1
Alligator clip*1
QC18W fast charger*1

Features and benefits

Why I love FNIRSI DPOS350P 4-IN-1

350MHz Bandwidth & 1GSa/s Sampling Rate
This high bandwidth and sampling rate allow for precise capture and analysis of fast-changing signals, crucial for debugging high-frequency circuits and understanding complex waveforms up to 350MHz.
Next-Level 8~16-bit Technology
The adjustable resolution filters noise effectively, improving signal detection and display. This is vital for detailed analysis of signal characteristics, especially when dealing with low-amplitude or noisy signals, providing clearer insights than standard 8-bit devices.
7″ IPS Ultra-Responsive Touchscreen
The durable tempered glass and capacitive touch interface provide smooth, intuitive navigation and interaction. This enhances user experience by making settings adjustments and waveform manipulation quick and efficient, similar to a modern tablet.
Advanced Spectrum Analyzer (200KHz~350MHz)
Covering a wide frequency range with precise manual controls and 3D waterfall display, this feature is indispensable for EMI testing, RF signal analysis, and harmonic detection, allowing engineers to identify and mitigate interference sources.
Built-in 50M Frequency Response Analyzer
The ability to perform Bode Plot Analysis from 100Hz to 50MHz is critical for testing the stability and performance of amplifiers, filters, and power supply feedback loops, providing essential data for circuit optimization.
High Voltage Protection (400V)
The robust input stage protects the device from voltage spikes up to 400V, significantly increasing the tool’s longevity and reliability, especially in industrial or high-power electronics environments.
QC Fast & Lithium Battery Charging (8000mAh)
The integrated 8000mAh battery with QC 2.0 fast charging ensures extended operation and quick turnaround times. This portability and rapid charging are crucial for field work or situations where power outlets are scarce.
Multi-Language Support
With support for English, Chinese, Russian, and Portuguese, the device caters to a global user base, making it accessible and user-friendly for a wider range of professionals and students.
Ultra-Sensitive 2mV/Div with Low System Noise
Maintaining full 350M analog bandwidth at 2mV sensitivity with a sealed shielding design minimizes noise interference. This allows for accurate measurement of very small signals, which is critical in sensitive electronic designs.
Efficient Data Storage & Viewing (1GB)
With 1GB of storage, capable of saving up to 90 images or 500 waveforms, users can easily store data for secondary analysis or documentation. This is invaluable for project tracking, reporting, and collaborative work.

Pros and Cons

Strengths & Weaknesses:

What I Like

Multi-functional (4-in-1: Oscilloscope,
Spectrum Analyzer, Signal Generator, FRA)
High 350MHz bandwidth and 1GSa/s sampling rate
Adjustable 8-16 bit resolution for noise reduction
Large, responsive 7″ IPS touchscreen
Built-in 8000mAh battery with QC 2.0 fast charging
High voltage protection (up to 400V)
Multi-language support (including Russian)
Excellent for EMI testing, RF analysis, and power loop testing
Low system noise and high sensitivity (2mV/Div)
Ample data storage for screenshots and waveforms

Points to Consider

Fan noise mentioned in a review (potential issue if fan is covered)
Screen and protective film can be glossy, requiring a matte film
Some users experienced long delivery times
One report of a defective display upon arrival (though resolved by seller)
Standby charging time is longer than fast charging time (5 hours vs 3 hours)

Price and Availability

Where to Buy & Customer Reviews

Check Price on AliExpress (Best Value)

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Find on eBay (New & Used)

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Store info

STORE

⭐ 98.6% Positive Feedback | 123.0K Followers

Name:	FNIRSI Official Store
Store no.:	2939001
Location:	China
Open since:	Feb 26, 2017

Detailed seller ratings

Item as Described	4.9 Above Average
Communication	4.9 Above Average
Shipping Speed	4.9 Above Average

OTHER GOODS

User reviews

User Reviews & Feedback Analysis ⭐ 4.8 (27) | Sold (105)

Reviews FNIRSI DPOS350P 4-IN-1

5 Stars 4.8

Authentic Feedback Analysis:

⭐ 5.0/5 | А***ч: очень быстрая доставка. включил все шустро работвет даже как то непривычно, все в целости и сохранности.
⭐ 5.0/5 | Ч***ч: супер девайс от fnirsi!!! так держать! скоро вы будете впереди планеты всей! очень рад!!!
⭐ 5.0/5 | П***ч: Посылка пришла, соответствует описанию… Пока особенно не вникал, включил работает, проверил переключения по функциям, работают, в целом надо ещё вникать и тестить…
⭐ 5.0/5 | П***ч: Отличный прибор!
⭐ 5.0/5 | К***ч: Отлично ⭐⭐⭐⭐⭐ 👍
⭐ 5.0/5 | К***ч: Просто превосходно! Лучший из осциллографов фнирси что я использовал — хорошо работает на низких частотах (2Гц) средних (10 МГц) выше не смотрел. отличный яркий экран большого размера с большими углами обзора. Замечания тоже есть — в нем вентилятор и если просто положить на стол он закрыт как долго проработки так не ясно, экран и защитная пленка блескучие — необходимо ставить матовую.
⭐ 5.0/5 | Т***ч: Тестирование займёт некоторое время, сам прибор и упаковка не повреждены, внутри всё целое, согласно комплектации. Продавец честно и быстро отправил товар, за что ему большое спасибо.
⭐ 5.0/5 | Б***ч: К сожалению, пришёл с большой задержкой из-за проблем на границе с Казахстаном. Но продавец ответственный, сделал всё возможное, чтобы товар дошёл до адресата! Respect! Ну а теперь буду осваивать новый прибор.
⭐ 5.0/5 | С***ч: Пришло за пять дней. Без дефектов и повреждений.
⭐ 5.0/5 | П***ч: Item is nice, but long time to delivery. Thank you.
⭐ 5.0/5 | л***ч: Все работает
⭐ 4.0/5 | Ч***ч: Очень долго доставлялся, все работает товар соответствует.
⭐ 4.0/5 | N***o: llego bien el producto
⭐ 2.0/5 | Ф***ч: Получил с дефектом дисплея. Попросил продавца отправить другой модуль. Продавец тянет время говорит нет на складе. Открыл повторный спор жду решения. Товар заказывался на подарок. Не рекомендую к покупке.,Продавец прислал новый модуль. Теперь всё отлично !
⭐ 5.0/5 | К***ч: Все отлично!
⭐ 5.0/5 | Б***ч:
⭐ 5.0/5 | AliExpress Shopper:
⭐ 5.0/5 | Д***й:
⭐ 5.0/5 | ***ч:
⭐ 5.0/5 | О***ч:
⭐ 5.0/5 | Б***ч:
⭐ 5.0/5 | Х***а:
⭐ 5.0/5 | Г***ч:
⭐ 5.0/5 | С***к:
⭐ 5.0/5 | Ш***М:
⭐ 5.0/5 | К***ч:
⭐ 5.0/5 | Б***ч:

Pinout and Interface Map

PRODUCT PARAMETER FNIRSI DPOS350P 4-IN-1

NIRSI DPOS350P 4-IN-1

Comparison table

Technical Specifications & Comparison FNIRSI DPOS350P 4-IN-1

Parameter	Oscilloscope	Signal Generator	Frequency Response Analyzer	Spectrum Analyzer
Channels	2 CH	N/A	N/A	N/A
Bandwidth	350MHz	N/A	N/A	N/A
Max Sampling Rate	1GSa/s	N/A	N/A	N/A
Memory Depth	47Kpts	N/A	N/A	N/A
Rise Time	1ns	N/A	N/A	N/A
High Resolution Mode	8bit ~ 16bit	N/A	N/A	N/A
Vertical Sensitivity	2mV ~ 20V (1X)	N/A	N/A	N/A
Time Base Range	5ns ~ 50s	N/A	N/A	N/A
Waveform Types	N/A	14 standard + captured	N/A	N/A
Frequency Range	N/A	0 ~ 50MHz (sine)	100Hz ~ 50MHz	200KHz ~ 350MHz
Amplitude	N/A	0 ~ 5VPP	0 ~ 5VPP	N/A
Offset	N/A	-2.5V ~ +2.5V	-2.5V ~ +2.5V	N/A
FFT Length	N/A	N/A	N/A	4K ~ 32K
Level Range	N/A	N/A	N/A	-60dBmV ~ +260dBmV

Final summary

Final Verdict: FNIRSI DPOS350P 4-IN-1

The FNIRSI DPOS350P 4-IN-1 Tool stands out as an exceptionally versatile and powerful instrument, offering a comprehensive suite of measurement capabilities in a portable form factor. Its high bandwidth, advanced resolution, and integrated features like the spectrum and frequency response analyzers make it an invaluable asset for both hobbyists seeking to expand their toolkit and professionals requiring a reliable, all-in-one solution for complex electronic projects. Despite minor concerns regarding potential fan noise and screen glare, the sheer functionality and performance, especially the high voltage protection and long battery life, overwhelmingly justify its cost. This device is an ideal choice for anyone involved in electronics design, repair, or education, with its multi-functionality being the standout advantage that truly outweighs any drawbacks. For more in-depth analyses, visit andibond.com.

FULL TECHNICAL REVIEW FNIRSI DPOS350P 4-IN-1 Tool, Color Temperature Display, Touchscreen, Support 4 Languages