FNIRSI DSO-TC4 3-IN-1 Digital Oscilloscope Transistor Tester

📊 1. Digital Oscilloscope

• Bandwidth: 10 MHz

• Sampling Rate: 48 MSa/s

• Vertical Sensitivity: 10 mV/div to 10 V/div

• Horizontal Time Base: 50 ns/div to 20 s/div

• Input Voltage Range:

  • ±40 V (with 1:1 probe)

  • ±400 V (with 10:1 probe)

• Input Impedance: 1 MΩ

• Coupling: DC only

• Trigger Modes: Auto, Normal, Single

• Trigger Type: Rising/Falling edge

• Waveform Storage: Yes, with waveform hold feature

• Display: 2.8-inch 320×240 TFT LCD

🧪 2. Transistor / Component Tester

• Tested Components:

  • Resistors, capacitors, diodes, Zener diodes

  • BJTs (NPN/PNP), FETs (N-channel, P-channel)

  • Triacs, SCRs, inductors

• Measurement Parameters:

  • Resistors: 0.1 Ω – 50 MΩ

  • Capacitors: 25 pF – 100 mF

  • Inductors: 0.01 mH – 20 H

  • Transistor hFE, Vbe, leakage current, etc.

• Other Features:

  • Pinout detection

  • NEC IR decoding (for remote controls)

  • Battery ESR measurement

  • Continuity buzzer

  • Frequency counter function

📶 3. DDS Signal Generator

• Waveform Types: 13 waveforms including sine, square, triangle, sawtooth, etc.

• Frequency Range: 0 Hz to 50 kHz

• Amplitude Output: 0.1 V – 3.0 V (adjustable)

• Duty Cycle: Adjustable

• Output Impedance: ~600 Ω

🔋 Power & Battery

• Battery Type: 1500 mAh Li-ion rechargeable battery

• Battery Life: Approx. 4 hours continuous use

• Charging Port: USB Type-C (5V/1A)

• Auto Power-Off: Configurable (15/30/60 minutes)