The FNIRSI DPOS350P is a 4-in-1 tablet test instrument combining a 2-channel, 350 MHz, 1 GSa/s digital oscilloscope with a signal generator, spectrum analyzer, and frequency response analyzer. Its 7-inch 1024 × 600 IPS capacitive touchscreen, USB data port, waveform and screenshot storage, and portable battery power support electronic development, circuit debugging, electronic design, industrial maintenance, signal measurement, and analysis. Select the required US or EU plug option.
Features
Four integrated functions: 350 MHz oscilloscope, 50 MHz signal generator, 200 kHz–350 MHz spectrum analyzer, and 10 Hz–50 MHz frequency response analyzer.
7-inch IPS capacitive touchscreen with 1024 × 600 pixels; supports grayscale, digital fluorescence, and color-temperature display.
USB data port supports screenshot viewing/copying and firmware upgrades using .iso image upgrades.
Storage capacity: 1 GB, up to 90 screenshots and 500 waveform groups; includes a data browser.
Supports Chinese, English, Russian, and Portuguese interface languages; five power-on preset items.
Selectable automatic shutdown from 15 minutes to 1 hour, or off.
3.7 V, 8000 mAh lithium battery; charging requirement: QC18W, 12 V/1.5 A via Type-C. Total power consumption: 10 W. Air cooling is specified.
Anodized aluminum and ABS+PC casing construction is specified.
Oscilloscope Specifications
Channels
2CH
Bandwidth
350 MHz
Rise time
1 ns
Maximum sampling rate
1 GSa/s
Waveform refresh rate
50,000 wfm/s
Memory depth
47 Kpts
Input impedance
1 MΩ / 14 pF
Time base range
5 ns–50 s
Roll time base
50 ms–50 s
Vertical sensitivity
2 mV–20 V (1X)
Vertical range
16 mV–160 V (1X)
DC accuracy
±2%
Time accuracy
±0.01%
Input coupling
DC / AC
Probe attenuation
1X / 10X / 100X
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
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 400 V
Waveform brightness
Adjustable
Simple FFT display
Supported
Digital fluorescence
Supported
Color-temperature display
Supported
X-Y mode
Supported
ZOOM time base
Supported
One-key automatic adjustment
Supported
One-key return to zero
Supported
Data browser
Supported
Signal Generator Specifications
Waveform types
14 standard functions plus captured waveform
Frequency
0–50 MHz (sine wave only; other waveforms up to 10M / 5M / 3M)
Amplitude
0–5 Vpp
Offset
-2.5 V to +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%
Customizable captured waveform storage
500 groups
Frequency Response Analyzer Specifications
Excitation signal frequency
10 Hz–50 MHz (latest firmware)
Excitation signal amplitude
0–5 Vpp
Excitation signal offset
-2.5 V to +2.5 V
Excitation frequency count
20–500
Cursor measurement
Frequency / gain / phase
Operating mode
Single / cyclic
System calibration
Supported
Spectrum Analyzer Specifications
Conversion method
FFT
FFT length
4K–32K
Frequency range
200 kHz–350 MHz
Level range
-60 dBmV to +260 dBmV
Cursor measurement
Frequency / amplitude
Marking parameter
Maximum energy harmonic
Waterfall chart
Supported
3D waterfall chart
Supported
Automatic adjustment
Supported
System calibration
Supported
Basic Specifications
Power-on configuration
5 preset items
Charging requirements
QC18W, 12 V/1.5 A (Type-C)
Languages
Chinese / English / Russian / Portuguese
Battery
3.7 V, 8000 mAh lithium battery
Screen
7-inch IPS, 1024 × 600 pixels
Standby time
Approximately 3 hours
Total power consumption
10 W
Interaction mode
Capacitive touchscreen
Heat dissipation
Air cooling
Expansion interface
USB data port
Dimensions
190 × 128 × 37 mm
Automatic shutdown
15 minutes–1 hour / off
Firmware upgrade
Supports .iso image upgrade
Applications
Supported uses include electronic development, circuit debugging, electronic design, industrial maintenance, signal measurement and analysis. The spectrum analyzer is specified for EMI testing, RF signal analysis, high-frequency measurements, and harmonic detection. The frequency response analyzer supports Bode analysis for amplifier, filter, and power-loop response testing.
What's Included
1 × DPOS350P host
2 × 350 MHz probes
1 × QC18W fast charger
1 × USB data cable
1 × alligator clip
1 × user manual
1 × packaging box
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: 400 V with a 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.
Visual Details
Features and Design
The DPOS350P is a 2-channel, 1 GSa/s, 8-bit tablet oscilloscope with a 50,000 WFM/s waveform update rate. The DPOS350P is presented as a 4-in-1 instrument with 350 MHz oscilloscope, 50 MHz signal generator, 200 kHz–350 MHz spectrum analyzer, and 10 Hz–50 MHz frequency response analyzer functions.The DPOS350P is labeled with 8–16-bit technology. The 8–16-bit technology is stated to filter noise for improved signal detection and display, enabling better analysis of signal details and characteristics.The DPOS350P is labeled with a digital fluorescent grayscale and color-temperature display. Digital fluorescence technology is stated to provide signal clarity and color precision.The advanced spectrum analyzer covers a 200 kHz–350 MHz frequency range. The spectrum analyzer provides manual controls for start/stop frequency, bandwidth, reference level, attenuation, and FFT length.The high-voltage input stage withstands up to 400 V in any configuration. The high-voltage input stage is stated to safeguard against voltage spikes.The built-in frequency response analyzer supports 10 Hz–50 MHz Bode plot analysis. Bode plot analysis provides adjustable frequency, excitation amplitude, and offset.The DPOS350P has an auto power-off timer. The timer graphic is marked at 15 min, 30 min, 45 min, and 1 hour.The DPOS350P has an integrated 3.7 V, 8000 mAh battery. The battery supports QC 2.0 fast charging.The front panel is labeled DPOS350P and 350MHz 1GSa/s. The DPOS350P supports Chinese, English, Russian, and Portuguese language settings.The casing is described as rugged anodized aluminum and ABS+PC. The product graphic claims the casing provides heat dissipation.A 150M/20M hardware bandwidth limiter filters high-frequency components above 150MHz/20MHz. The product is stated to maintain full 350M analog bandwidth at 2mV sensitivity.Long Time Base Flow Mode is intended for real-time monitoring of slow voltage changes, such as battery charge/discharge curves. Digital Fluorescence X-Y Mode uses CH1 as the X-axis and CH2 as the Y-axis to generate closed-loop curves for amplitude, frequency, and phase comparisons.The DPOS350P is equipped with 1GB storage. The storage is stated to save up to 90 images or 500 waveforms for secondary analysis.The DPOS350P is identified as a 4-IN-1 350 MHz tablet oscilloscope. The oscilloscope is labeled 2CH, 1GSA/S, 8BIT, and 50000 WFM/S.Bandwidth is 350MHz. Sampling rate is 1GSA/S.The DPOS350P is labeled 350 MHz and 1 GSa/s. The DPOS350P graphic states 8-bit to 16-bit technology and shows resolution-mode choices from 8 bit through 16 bit.The device bezel is labeled 350 MHz and 1 GSa/s. The DPOS350P is promoted with digital fluorescence, grayscale, and color-temperature display modes.The signal generator supports 14 waveform types. The signal generator frequency is adjustable from 0 to 50 MHz.The spectrum analyzer covers a 200 kHz to 350 MHz frequency range. Spectrum-analyzer controls include start/stop frequency, bandwidth, reference level, attenuation, and FFT length.The DPOS350P is stated to have a high-voltage input stage that withstands up to 400V in any configuration to safeguard against voltage spikes.The DPOS350P has a built-in 50M frequency response analyzer. Bode plot analysis covers 10Hz–50MHz.Auto shutdown can be set from 15 minutes to 1 hour, or turned off. The DPOS350P has an auto power-off timer.The DPOS350P has an integrated 3.7V/8000mAh battery. QC 2.0 charging technology delivers 18W fast charging.The DPOS350P supports Chinese, English, Russian, and Portuguese interface languages. Language selection is available in the device settings menu.The device uses rugged anodized aluminum and ABS+PC casing for durability and heat dissipation.A 150M/20M hardware bandwidth limiter filters high-frequency components above 150 MHz or 20 MHz to reduce noise and harmonics. Zoom Time Base Expansion magnifies selected waveform sections for detailed analysis.The oscilloscope provides 2 mV/div sensitivity while maintaining full 350M analog bandwidth. A sealed shielding design is specified to minimize noise interference.Long Time Base Flow Mode supports real-time monitoring of slow voltage changes, including battery charge and discharge curves. Digital Fluorescence X-Y Mode uses CH1 as the X-axis and CH2 as the Y-axis to generate closed-loop curves for amplitude, frequency, and phase comparisons.The oscilloscope supports Auto, Single, and Normal trigger modes. Single and Normal trigger modes capture transient signals, while Auto mode is intended for measuring periodic signals.Manual Cursor Measurement is provided for measuring amplitude, frequency, and period in noisy signals. FFT Spectrum Analysis qualitatively displays spectral components of the current signal.The device has 1GB of storage and can save up to 90 images or 500 waveforms for secondary analysis. The picture browser displays saved screenshots as thumbnails.
Specifications and Performance
The DPOS350P has 350 MHz bandwidth. The DPOS350P sampling rate is 1 GSa/s.The DPOS350P signal generator supports 14 waveform types. The signal generator has adjustable frequency from 0 to 50 MHz.Screen size is 7 inches. Screen resolution is 1024 x 600 pixels.Charging requirements are QC18W - 12V/1.5A. Battery specifications are a 3.7V, 8000mAh lithium battery.The oscilloscope has 2 channels and supports 1X / 10X / 100X probe attenuation. Bandwidth is 350MHz; the hardware bandwidth limit is 150M / 20M.The signal generator provides 14 standard functions plus captured waveform; duty cycle is 0.1% ~ 99.9%. Signal-generator frequency is 0 ~ 50MHz for sine wave only; other waveforms are up to 10M/5M/3M. Frequency resolution is 1Hz.The DPOS350P has a 7-inch IPS touchscreen with 1024 × 600 resolution. The touchscreen is described as capacitive and covered with durable tempered glass for scratch resistance.The screen size is 7 inches. The screen resolution is 1024 x 600 pixels.The oscilloscope has 2 channels and probe attenuation options of 1X / 10X / 100X. Oscilloscope bandwidth is 350MHz; hardware bandwidth limit is 150M / 20M.Frequency-response analyzer excitation signal frequency is 10Hz-50MHz; cursor measurement covers frequency, gain, and phase. Frequency-response analyzer excitation signal amplitude is 0 ~ 5VPP; operating mode is single / cyclic.
Interfaces and Connections
The DPOS350P has 2-channel input. The two input channels are specified as dual 1 MΩ (18 pF) inputs for simultaneous signal measurement.The DPOS350P connects to a PC via USB. USB connection supports viewing or copying screenshots.The DPOS350P has 2 input channels for simultaneous signal measurement. Each stated input channel has 1 MΩ input impedance and 18 pF input capacitance.The DPOS350P connects to a PC via USB to view or copy screenshots. The DPOS350P supports ISO file updates for firmware upgrades.
Package Contents
The package includes one DPOS350P host. The package includes one packaging box.The packing list includes one DPOS350P host. The packing list includes one packaging box.
