Portable 2-in-1 mini oscilloscope and signal generator Fnirsi DSO153 150 MHz bandwidth, 1 GS/s sample rate

The FNIRSI DSO153 is a compact 2-in-1 handheld instrument combining an oscilloscope and a signal generator. It is designed for portable use in workshops and fieldwork, offering waveform viewing, measurement functions and signal output in a small, lightweight body. The device includes a rechargeable lithium battery, USB-C charging and language support for multiple locales.

Advantages

The FNIRSI DSO153 provides accurate waveform analysis with stop, zoom and shift functions that help to detect interference and inspect complex modulation. Its built-in 1000 mAh battery and automatic shutdown improve portability and energy efficiency. The unit features responsive controls, a 90° folding stand and a USB-C port for fast charging and firmware updates. It supports multiple languages and offers intelligent overload protection.

Suitable for

• Hobby electronics and DIY projects
• Appliance and device repair
• Automotive service diagnostics
• School labs and teaching demonstrations
• Field measurements and maintenance

Key specifications

• Manufacturer: FNIRSI
• Model: DSO153
• Bandwidth: 1 MHz (as provided in source)
• Sampling frequency: 5 Ms/s (as provided in source)
• Time base range: 500 ns – 20 s
• Measuring values: 12 types
• Trigger modes: Automatic, single, normal
• Voltage measurement range: up to 400 V
• Calibration square wave: 1 kHz supported
• Frequency (signal generator): 0–10 kHz
• Duty cycle: 0–100%
• Amplitude (signal output): 0.1–3 V
• Waveform types (signal generator): 14 types
• Supported languages: 8
• Automatic shutdown: supported

How to use

Charge the device using the USB-C cable before first use. Connect the oscilloscope probe or the P6100 probe to the input and attach the crocodile clip where required. Power on the unit, select the oscilloscope or signal generator mode via the mode switch, and use the controls to adjust time base, trigger and vertical scale. Use the stop, zoom and shift functions to examine waveforms in detail. For signal output, choose waveform type, frequency, amplitude and duty cycle on the generator panel.

Recommendations

Use appropriate probe grounding and observe safety precautions when measuring mains voltages up to the specified voltage range. Store the device charged periodically to preserve battery life and update firmware via USB-C when updates are available.