Fnirsi DPOS350P 4-in-1 digital oscilloscope

FNIRSI DPOS350P 4-in-1 Digital Oscilloscope
The FNIRSI DPOS350P is a versatile digital oscilloscope designed for convenient and intuitive operation. It features a large 7-inch touch screen for clear signal viewing and quick access to key functions. It combines the features of an oscilloscope, signal generator, spectrum analyzer, and frequency response analyzer, making it suitable for a wide range of measurement applications. High bandwidth, fast sampling, and large memory enable precise signal analysis, while advanced visualization modes improve measurement readability.


Full control over the signal
The large 7-inch touch screen provides a full view of the analyzed signal and precise parameter control. The clear interface allows you to quickly understand the behavior of the system, and the high image quality makes the DPOS350P an "engineer's second pair of eyes" – indispensable for diagnostics and testing.


Maximum functionality
The FNIRSI DPOS350P is an advanced 4-in-1 oscilloscope that offers the functions of four different devices. It is an oscilloscope (2 channels, 350 MHz bandwidth, 1 GSa/s sampling, 8-bit resolution, 50,000 waveforms per second), signal generator (up to 50 MHz), spectrum analyzer (200 kHz – 350 MHz range), and frequency response analyzer (100 kHz – 50 MHz). Such a wide range of functions means that one device replaces several specialized tools, saving space and time.


High measurement performance
The DPOS350P model offers a bandwidth of 350 MHz, a sampling rate of 1 GSa/s, and a memory depth of 60 kpts, which translates into accurate signal reproduction and stable measurements even with complex waveforms. What's more, the FNIRSI DPOS350P allows Bodé chart analysis in the 100 Hz – 50 MHz range, with adjustable frequency, excitation amplitude, and offset. It is the ideal tool for testing amplifiers, filters, and power loops, allowing you to quickly and accurately assess the frequency response of a circuit.


Advanced spectrum and EMI analysis
The device covers a frequency range from 200 kHz to 350 MHz and allows for precise manual adjustment of key parameters (start/stop frequencies, bandwidth, reference level, attenuation, and FFT length). Cursor measurement functions and advanced visualization modes are at your disposal, including an impressive and extremely clear 3D Waterfall view. This makes the oscilloscope ideal for EMI testing, RF signal analysis, and harmonic detection.


Signal visibility like never before
Digital fluorescence technology provides exceptional signal clarity and precise color reproduction. In addition, advanced noise filtering improves waveform detection and presentation, enabling more accurate signal analysis. Support for 8-16-bit technology takes image clarity to the next level.


Tablet design that makes work easier
The slim housing in an elegant black finish with blue accents combines modern design with ergonomics. The tablet form factor allows for comfortable one-handed operation, and the touch interface makes all functions immediately accessible—without unnecessary menus and complicated navigation. This is a device that naturally adapts to the user's work rhythm. The oscilloscope supports multiple languages, including English, Chinese, Russian, and Portuguese, making it ideal for international environments.



Included
350 MHz probe x2
QC18W charger
USB cable
Alligator clip leads
User manual

 
General


Manufacturer: Fnirsi
Model: DPOS350P
Startup configuration: 5 presets
Languages: Chinese / English / Russian / Portuguese
Screen diagonal: 7 inches
Screen resolution: 1024 × 600 pixels
Screen technology: IPS, full viewing angle
Interaction mode: Capacitive touch screen
Expansion interface: Capacitive touch screen
Auto power off: 15 minutes ~ 1 hour / off
Update: Supports .iso image updates
Charging requirements: QC18W – 12 V / 1.5 A
Battery: 3.7 V lithium, 8000 mAh
Operating time: approx. 3 hours
Charging time: approx. 5 hours
Total power consumption: 10 W
Cooling: passive (air)
Device dimensions: 190 × 128 × 37 mm

 
Frequency response analyzer (FRA)


Excitation signal frequency: 100 Hz ~ 50 MHz
Excitation signal amplitude: 0 ~ 5 Vpp
Excitation signal offset: −2.5 V ~ +2.5 V
Number of frequency points: 20 ~ 500
Cursor measurement: frequency / gain / phase
Operating mode: single / cyclic
System calibration: supported

 
Spectrum analyzer (SA)


Conversion method: FFT
FFT length: 4K ~ 32K
Frequency range: 200 kHz ~ 350 MHz
Level range: −60 dBmV ~ +260 dBmV
Cursor measurement: frequency / amplitude
Marking parameter: maximum energy harmonic
Waterfall graph: supported
3D waterfall graph: Supported
Auto adjustment: Supported
System calibration: Supported

 
Oscilloscope


Number of channels: 2
Bandwidth: 350 MHz
Rise time: 1 ns
Max. sampling frequency: 1 GSa/s
Memory depth: 60 kpts
Input impedance: 1 MΩ / 14 pF
Time base range: 5 ns ~ 50 s
Time base (roll): 50 ms ~ 50 s
Vertical sensitivity: 2 mV ~ 20 V (1×)
Vertical range: 16 mV ~ 160 V (1×)
DC accuracy: ±2%
Time accuracy: ±0.01%
Input coupling: DC / AC
Background grid: display / hide
Waveform shift: coarse / fine adjustment
Overvoltage protection: up to 400 V
Waveform brightness: adjustable
FFT display: supported
Digital fluorescence: supported
Probe attenuation: 1× / 10× / 100×
Hardware bandwidth limit: 150 MHz / 20 MHz
High resolution mode: 8 bit ~ 16 bit
Parameter measurements: 12 types
Cursor measurement: time, period, frequency, level, voltage
Trigger detection: digital
Trigger channel: CH1 / CH2
Trigger mode: Auto / Single / Normal
Trigger edge: Rising / Falling
Trigger attenuation: L1 ~ L3
Trigger level: Manual / Auto (10% ~ 90%)
Screenshot recording: 90 images
Waveform recording: 500 sets
Color temperature display: Supported
X-Y mode: Supported
Time base zoom: Supported
One-key auto adjustment: Supported
One-key zero return: Supported
Data browser: Supported

 
Signal generator (SG)


Waveform types: 14 standard + captured waveform
Frequency: 0 ~ 50 MHz (sine), other waveforms up to 10 M / 5 M / 3 M
Amplitude: 0 ~ 5 Vpp
Offset: −2.5 V ~ +2.5 V
Duty cycle: 0.1% ~ 99.9%
Frequency resolution: 1 Hz
Amplitude resolution: 1 mV
Offset resolution: 1 mV
Duty cycle resolution: 0.1%
Stored custom waveforms: 500 sets