FNIRSI DSO-TC4 3-in-1 Portable Oscilloscope, Signal Generator and Component Tester

Test and troubleshoot electronic circuits with the FNIRSI DSO-TC4, a portable 3-in-1 instrument combining an oscilloscope, signal generator, and component tester. The detailed product information lists a 10 MHz analog bandwidth, 48 MSa/s real-time sampling, a 2.8-inch color screen, and a built-in rechargeable battery.

Three Test Functions

• Oscilloscope: View and measure waveforms with one digital channel.
• Signal generator: Output 13 listed waveform types with adjustable frequency, amplitude, and duty cycle.
• Component tester: Test or identify listed transistors, diodes, Zener diodes, FETs, SCRs, capacitors, resistors, inductors, DS18B20 sensors, and DHT11 sensors.

Oscilloscope Specifications

• Model: DSO-TC4
• Digital channels: 1
• Real-time sampling rate: 48 MSa/s
• Analog bandwidth: 10 MHz
• Input impedance: 1 MΩ
• Coupling: AC/DC
• Vertical sensitivity: 10 mV/div to 10 V/div in the listed X1 range
• Time base: 50 ns to 20 s
• Trigger modes: Auto, normal, and single
• Trigger types: Rising edge and falling edge
• Waveform hold or freeze: Yes
• Automatic measurements: Max, min, average, RMS, Vpp, frequency, cycle, and duty cycle
• Waveform screenshot saving and viewing listed

Signal Generator Specifications

• 13 waveform outputs listed
• Frequency range: 0-50 kHz
• Amplitude: 0.1-3.0V
• Square-wave duty cycle: 0-100%
• Frequency, amplitude, and duty cycle are adjustable according to the source

Component Testing

• Transistor test
• Diode forward-voltage test: less than 5V listed
• Zener diode test: 0.01-4.5V
• FET test: JFET, IGBT, and MOSFET listed
• Unidirectional SCR trigger voltage: less than 5V listed
• Bidirectional SCR trigger current: less than 6 mA listed
• Capacitance: 25 pF-1000 μF
• Resistance: 0.01 Ω-50 MΩ
• Inductance: 10 μH-1000 μH
• DS18B20 and DHT11 sensor tests listed

Portable Design

• Screen: 2.8-inch TFT color screen
• Adjustable screen backlight
• Battery: 3.7V, 1500mAh rechargeable lithium battery
• Battery: Included and listed as non-removable
• Charging or power input: USB Type-C, 5V/1A
• Approximate size: 90 x 142 x 27.5 mm
• Approximate product weight: 186 g
• Languages listed: Chinese, English, German, Portuguese, Japanese, Spanish, Korean, and Russian

Package Contents

• 1 DSO-TC4 host
• 3 test hooks
• 1 P6100 probe
• 1 alligator-clip probe
• 1 USB Type-C cable
• 1 user manual
• 1 package box

Specification Conflict Note

The source also contains generic or conflicting headline fields, including under-60 MHz bandwidth, 1 GSa/s sampling, 30,000 waveform captures per second, a 640 x 480 display entry, and a 4K record-length entry. Those values do not match the detailed DSO-TC4 specifications above. Confirm the exact datasheet or firmware version before relying on any conflicting headline value for a technical application.

Electrical Safety

• Use the correct probe attenuation setting for the measurement.
• The source lists 80 Vpp (+40V) with a 1:1 probe and 800 Vpp (+400V) with a 10:1 probe. These are source-listed test-voltage limits, not a recommendation to measure mains or high-energy circuits.
• Do not connect the instrument to mains, high-energy, or unknown circuits unless the probe, instrument, grounding, and measurement category are confirmed suitable.
• Disconnect power before connecting or removing component-test leads.
• Use the manual and applicable electrical-safety procedures for the circuit under test.
• Do not exceed the confirmed limits of the instrument, probe, or test leads.

Frequently Asked Questions

What does 3-in-1 mean?

The DSO-TC4 combines an oscilloscope, signal generator, and component tester.

What is the detailed oscilloscope bandwidth?

The detailed DSO-TC4 information lists 10 MHz analog bandwidth and 48 MSa/s real-time sampling. The source also contains conflicting generic values, so confirm the exact datasheet before purchase for critical measurements.

Does it have a built-in battery?

Yes. A non-removable 3.7V/1500mAh rechargeable lithium battery is listed, with USB Type-C 5V/1A power input.

Can it generate signals?

Yes. The source lists 13 waveform outputs, a 0-50 kHz frequency range, 0.1-3.0V amplitude, and adjustable square-wave duty cycle.

What probes are included?

The package list includes three test hooks, one P6100 probe, one alligator-clip probe, and one USB Type-C cable.

Can it measure mains electricity?

Do not assume that it can. Confirm the instrument and probe safety ratings for the specific circuit, and follow the manual and applicable electrical-safety procedures before making any high-voltage measurement.