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The FNIRSI DSO-TC4 digital oscilloscope is an advanced multifunction test instrument designed for electronics engineers, maintenance technicians, R&D laboratories, students and electronics enthusiasts. Combining a 10MHz portable oscilloscope, a signal generator and a comprehensive transistor and electronic component tester in a single device, it provides a practical and versatile solution for measurement, diagnostics and electronic circuit analysis.
The integrated digital oscilloscope offers a 10MHz analogue bandwidth and a real-time sampling rate of 48MSa/s, enabling accurate observation and analysis of both analogue and digital signals. With input protection up to ±400V and Auto, Normal and Single trigger modes, it is ideally suited for troubleshooting, circuit testing, electronic repairs and educational applications.
The built-in function generator supports 13 waveform outputs with frequencies ranging from 0 to 50kHz. Output parameters including frequency, amplitude and duty cycle can be adjusted as required, making it suitable for signal simulation, prototype development, laboratory testing and electronic design verification.
As a powerful electronic component tester, the DSO-TC4 automatically identifies component type and pin configuration. It can analyse a wide range of components including BJT transistors, MOSFETs, JFETs, IGBTs, SCRs, TRIACs, diodes, Zener diodes, capacitors, resistors and inductors. This significantly simplifies testing procedures and improves efficiency during maintenance and repair work.
The 2.8-inch colour TFT display provides a clear and intuitive view of waveforms, measurement values and test results. Its integrated 1500mAh rechargeable lithium battery delivers reliable portable operation, making it ideal for field service, mobile diagnostics and workshop use.
Compact, lightweight and easy to carry, the FNIRSI DSO-TC4 is an excellent choice for professionals and hobbyists seeking a portable oscilloscope with signal generator and transistor tester. It combines accurate signal measurement, component identification and waveform generation in a single professional-grade instrument.
| Brand | FNIRSI |
| Model | DSO-TC4 |
| Display | 2.8-inch Colour TFT Display |
| Backlight | Adjustable Brightness |
| Power Supply | USB Type-C (5V / 1A) |
| Battery | 3.7V / 1500mAh Lithium Battery |
| Languages | Chinese, English, German, Portuguese, Japanese, Spanish, Korean and Russian |
| Dimensions | 90 × 142 × 27.5 mm |
| Weight | 186 g |
| Oscilloscope | |
| Real-Time Sampling Rate | 48 MSa/s |
| Analogue Bandwidth | 10 MHz |
| Input Impedance | 1 MΩ |
| Coupling Mode | AC / DC |
| Voltage Measurement Range | 1:1 Probe: 80 Vpp (+40V) / 10:1 Probe: 800 Vpp (+400V) |
| Vertical Sensitivity | 10mV/div to 10V/div (X1) |
| Vertical Offset | Adjustable |
| Time Base Range | 50ns to 20s |
| Trigger Modes | Auto, Normal and Single |
| Trigger Types | Rising Edge, Falling Edge |
| Trigger Level | Adjustable |
| Waveform Freeze | Yes (HOLD Function) |
| Automatic Measurements | Max, Min, Average, RMS, Vpp, Frequency, Period and Duty Cycle |
| Component Testing | |
| Transistors | hFE, Ube, Ic/Ie, Iceo, Ices and Uf |
| Diodes | Forward Voltage Drop < 5V, Junction Capacitance and Reverse Leakage Current |
| Zener Diodes | 0.01V to 32V |
| JFET | Cg, Id and Uf |
| IGBT | Id under Vgs and Uf |
| MOSFET | Vt, Cg, Rds and Uf |
| Unidirectional SCR | Trigger Voltage < 5V |
| Bidirectional SCR | Trigger Current < 6mA |
| Capacitors | 25pF to 100mF, Capacitance and Vloss |
| Resistors | 0.01Ω to 50MΩ |
| Inductors | 10μH to 1000μH with DC Resistance |
| Sensor Compatibility | DS18B20 and DHT11 |
| Signal Generator | |
| Waveform Output | 13 Supported Waveforms |
| Output Frequency | 0 to 50 kHz |
| Square Wave Duty Cycle | 0 to 100% |
| Output Amplitude | 0.1V to 3.0V |
