FNIRSI DSO-TC4 Oscilloscope, Function Generator and Component Tester

FNIRSI® DSO-TC4 3-in-1 multifunctional handheld device – oscilloscope, component tester and signal generator.
Are you looking for a compact, versatile and reliable device for diagnosing, testing and debugging electronics, both in the workshop and in the field? The DSO-TC4 is an innovative 3-in-1 portable instrument that combines a single-channel digital oscilloscope, a smart electronic component tester and a DDS function generator in a single unit. Weighing just under 190 grams and featuring an ergonomic design, it replaces several bulky benchtop instruments, making it the ideal companion for service engineers, developers, students and keen amateur radio operators.


Product specifications:

- Oscilloscope: actual sampling rate of 48 MSa/s (the TC3 had 10 MSa/s) and an analogue bandwidth of 10 MHz. Supports the automatic setting (AUTO) function and overvoltage protection up to ±400 V when using a 10:1 probe
- Component tester: automatically identifies and measures a wide range of components, including transistors (NPN, PNP, MOSFET, JFET, IGBT), diodes (including Zener diodes up to 32 V), resistors, capacitors and inductors
- Signal generator: enables the output of 13 types of waveforms (sine, square, triangle, pulse, etc.) in the frequency range 0–50 kHz with an adjustable amplitude of 0–3 V
- Additional tools: includes a continuity tester (ring test), voltage measurement (0–40 V DC), infrared decoding (NEC protocol) and support for DS18B20 temperature sensors and DHT11 humidity sensors
- Data sharing: TC4 USB Image Sharing, which allows screenshots and measured data to be transferred to a PC for further analysis
- Equipped with a 2.8-inch colour TFT display; the display is clear and intuitive
- built-in high-capacity rechargeable lithium battery (1500 mAh), standby time of 4 hours
- small and lightweight, suitable for mobile use


Technical specifications:

- Model: DSO-TC4
- Display: 2.8" colour TFT (320 × 240)
- Backlight: adjustable brightness
- Charging: USB-C (5 V/1 A)
- battery: 3.7 V / 1500 mAh
- dimensions: 90 × 142 × 27.5 mm
- weight: 186 g

Oscilloscope specifications:
- sampling rate: 48 MSa/s
- analogue bandwidth: 10 MHz
- input impedance: 1 M?
- connection mode: AC / DC
- test voltage range:
1:1 probe: 80 Vpp (+40 V)
10:1 probe: 800 Vpp (+400 V)
- vertical sensitivity: 10 mV/division ~ 10 V/division (X1 range)
- time base range: 50 ns/div – 20 s/div
- trigger mode: automatic / normal / simple
- trigger type: rising edge, falling edge
- waveform freeze: yes (HOLD function)
- automatic measurements: max., min., average, RMS, Vpp, frequency, period, duty cycle

Component testing:
- Component testing
resistors (0.1 ?–50 M?)
capacitors (25 pF–100 mF)
inductors (10 µH–1000 mH)
- Transistor/diode tester: BJT, FET, MOSFET, IGBT, TRIAC, Zener diodes

Signal generator parameters:
- Output waveform: supports 13 outputs with signal waveforms
- Waveform frequency: 0–50 kHz
- Square wave duty cycle: 0–100 %
- Waveform amplitude: 0.1 V–3.0 V


Package contents:
- FNIRSI DSO-TC4.
- P6100 oscilloscope probe with 1:1 / 10:1 switching
- Cable with alligator clips
- 3x test hooks
- USB-C charging cable