The FNIRSI DSO-TC3 is a powerful 3-in-1 multifunctional electronic testing instrument combining a digital storage oscilloscope, signal generator, and transistor tester in one compact, portable unit. Designed for electronics hobbyists, engineers, and repair technicians, it offers exceptional versatility and precision for analyzing, diagnosing, and testing electronic circuits in real time.

With a sampling rate of 10MS/s and bandwidth of 500kHz, the FNIRSI DSO-TC3 digital oscilloscope provides accurate waveform capture and visualization on its 2.4-inch TFT LCD screen. It supports multiple trigger modes, including single, normal, and automatic, allowing users to capture both repetitive and one-time signal events effectively. The adjustable vertical sensitivity from 20mV/div to 5V/div and a horizontal scale from 50ns/div to 1s/div provide flexible signal measurement across a wide range of applications.

The integrated signal generator can produce multiple waveforms—sine, square, triangle, pulse, ramp, and DC signals—up to 100kHz, making it ideal for circuit simulation, component testing, and educational demonstrations.

The transistor tester function supports NPN, PNP, MOSFET, diode, and FET testing, with automatic pin detection and in-circuit analysis, allowing you to test components without desoldering. It also features NEC protocol support, enabling remote signal analysis for IR communication devices.

Compact yet feature-rich, the FNIRSI DSO-TC3 also includes continuity testing, voltage measurement, PWM signal analysis, and temperature sensing capability. Powered by a rechargeable lithium-ion battery, it offers 4–6 hours of operation on a single charge, making it a perfect portable solution for lab, field, or classroom use.

Features:

• 3-in-1 Design: Combines oscilloscope, signal generator, and transistor tester in one device.

• High Sampling Rate: 10MS/s sampling with 500kHz bandwidth for accurate signal capture.

• Multiple Trigger Modes: Single, Normal, and Auto modes for versatile waveform analysis.

• Color Display: 2.4-inch TFT LCD screen (320x240) with bright backlight for clear visibility.

• Multi-Waveform Signal Generator: Generates sine, square, triangle, pulse, ramp, and DC signals up to 100kHz.

• Advanced Transistor Testing: Supports NPN, PNP, FET, MOSFET, diode testing, and automatic pin recognition.

• In-Circuit Testing: Allows testing of components without desoldering.

• Additional Measurements: Continuity, voltage, PWM signal, and temperature measurements supported.

• Rechargeable Battery: Built-in lithium-ion battery with up to 6 hours runtime, USB charging supported.

• Portable and Durable: Compact 150×80×30mm design with lightweight casing for easy portability.

Specifications:

Oscilloscope Functionality

• Sampling Rate: 10MS/s

• Bandwidth: 500kHz

• Input Impedance: 1MΩ

• Trigger Modes: Single / Normal / Auto

• Vertical Sensitivity: 20mV/div – 5V/div

• Horizontal Scale: 50ns/div – 1s/div

Display

• Screen: 2.4-inch TFT LCD

• Resolution: 320×240 pixels

• Backlight: Yes

Signal Generator

• Waveforms: Sine, Square, Triangle, Pulse, Ramp, DC

• Frequency Range: 1Hz – 100kHz (depends on waveform)

• Output Amplitude: Adjustable

Transistor Tester

• Supported Devices: NPN, PNP, FET, MOSFET, Diodes

• In-Circuit Testing: Supported

• Pin Definition: Automatic detection

• NEC Protocol: Supported

Additional Functions

• Continuity Test: Yes

• Voltage Measurement: Yes

• PWM Analysis: Yes

• Temperature Measurement: With compatible sensor

Power Supply

• Battery: Rechargeable lithium-ion

• Battery Life: 4–6 hours continuous use

• Charging: USB charging

Physical Specs

• Dimensions: 150 × 80 × 30 mm

• Weight: ~300g

• Enclosure: Lightweight durable casing

Applications:

• Education: Perfect for students learning about electronics and signal behavior.

• DIY Projects: Ideal for makers, hobbyists, and experimenters working on electronic circuits.

• Repair & Diagnostics: Essential tool for professionals troubleshooting electronic boards and devices.

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