Hanmatek Oscilloscope Tutorial: Beginner’s Guide to Measuring Waveform

Learning how to use an oscilloscope can feel overwhelming for beginners. Many users buy a digital oscilloscope but struggle to get stable waveforms or understand trigger settings. The good news is that waveform measurement is much easier once you understand the basics.

This beginner oscilloscope tutorial is designed for:

• Electronics DIY projects
• Arduino and STM32 learning
• Power supply repair
• Automotive electronics
• Engineering debugging
• PWM signal analysis

In this guide, we’ll use the Hanmatek DOS1102 oscilloscope as the main example because it offers beginner-friendly controls, dual-channel waveform analysis, and 110MHz bandwidth suitable for most electronics projects.

👉 View Hanmatek DOS1102 Specifications

What Is an Oscilloscope?

An oscilloscope is a test instrument used to display electrical signals as waveforms over time. Unlike a multimeter, which only shows average voltage values, an oscilloscope lets you see how signals actually behave.

With a Hanmatek oscilloscope, you can:

• Observe voltage changes over time
• Analyze real-time waveforms
• Detect abnormal signals and glitches
• Measure PWM signals
• Debug communication buses
• Analyze ripple and noise

Oscilloscope vs Multimeter

A multimeter and oscilloscope serve different purposes.

Multimeter is Best For

• Measuring static voltage
• Measuring resistance
• Continuity testing
• Current measurements

Oscilloscope is Best For

• Viewing dynamic waveforms
• PWM signal analysis
• High-frequency signal measurement
• Timing analysis
• Ripple and noise testing

Can an Oscilloscope Replace a Multimeter?

Not completely. However, some Hanmatek oscilloscope models include integrated multimeter functions, making them useful all-in-one tools for electronics work.

Hanmatek DOS1102 Unboxing & Setup Guide

👉 Product Link: https://hanmatek.com/collections/oscilloscope/products/hanmatek-dos1102-110mhz-2ch-oscilloscope

What’s Included in the Box?

The Hanmatek DOS1102 package typically includes:

• DOS1102 oscilloscope
• Oscilloscope probes
• Power adapter
• USB cable
• User manual

How to Connect an Oscilloscope Probe

Correct probe installation is critical for accurate waveform measurements.

Probe Installation Steps

1. Connect the BNC connector to CH1 or CH2
2. Set the probe attenuation to 1X or 10X
3. Attach the ground clip to circuit ground
4. Confirm the channel is enabled
5. Verify waveform display

For most signal measurements, 10X mode is recommended because it reduces circuit loading and improves high-frequency performance.

How to Calibrate an Oscilloscope Probe

Probe calibration (or probe compensation) is the process of matching the oscilloscope probe to the input channel so that signals are displayed accurately. Most passive probes have an adjustable compensation capacitor that must be tuned to the oscilloscope’s input capacitance.

To calibrate, you typically connect the probe to the oscilloscope’s built-in square wave calibration output. Then, using a small adjustment tool, you turn the compensation screw on the probe until the displayed square wave looks clean and flat on the top and bottom—without overshoot (peaks) or rounding.

Proper calibration ensures that fast signal edges are not distorted, which is critical for accurate amplitude and timing measurements, especially in digital and switching circuits.

Why Probe Calibration Matters

Correct calibration helps:

• Prevent waveform distortion
• Improve measurement accuracy
• Ensure stable square-wave display
• Maintain high-frequency performance

Oscilloscope Probe Calibration Steps

1. Connect the probe to the oscilloscope calibration terminal
2. Enable the built-in square wave output
3. Display the waveform on screen
4. Adjust the compensation capacitor using a screwdriver
5. Tune until the square wave appears perfectly flat

Correct vs Incorrect Probe Compensation

• Correct compensation: clean square wave
• Overcompensation: waveform peaks upward
• Undercompensation: rounded waveform edges

Quick Answer

How to calibrate an oscilloscope probe？

Connect the probe to the calibration terminal and adjust the compensation capacitor until the square wave becomes a clean rectangular waveform.

Hanmatek Oscilloscope Basic Controls

The Hanmatek DOS1102 uses a beginner-friendly interface that makes waveform measurement easier.

Main Interface Areas

Waveform Display Area

Shows voltage changes over time.

Channel Controls

Used for:

• Voltage scaling
• Channel enable/disable
• Coupling mode selection

Time Base Controls

Adjust waveform horizontal scale.

Trigger Controls

Stabilize the waveform display.

Dual-Channel Oscilloscope Tutorial

The Hanmatek DOS1102 is a dual-channel oscilloscope, allowing simultaneous measurement of two signals.

Why Dual Channels Matter

Dual-channel analysis helps compare:

• Input vs output signals
• Clock and data timing
• PWM control and motor response
• Sensor signals and reference voltages

Common Channel Settings

Voltage Scale

Adjust volts/div according to signal amplitude.

Coupling Mode

• DC coupling: displays AC + DC
• AC coupling: removes DC offset

Probe Ratio

Ensure the oscilloscope matches the probe setting.

How to Use Oscilloscope Triggering

Triggering is a key oscilloscope function that stabilizes repetitive waveforms on the screen. Without proper triggering, the signal would appear to drift or roll, making it hard to analyze.

The basic idea is that the oscilloscope waits for a specific condition in the signal—such as a rising edge crossing a set voltage level—before it starts drawing the waveform. This creates a stable, repeatable display.

Common trigger types include edge triggering (most widely used), pulse width triggering, and slope triggering. For beginners, edge trigger is usually enough: you set the trigger source, choose rising or falling edge, and adjust the trigger level until the waveform locks into place.

Good triggering makes measurements like frequency, amplitude, and timing much more reliable and easier to interpret.

What Does Triggering Do?

Triggering controls when the oscilloscope starts drawing a waveform. Instead of capturing signals at random points in time, the scope waits for a specific event—like the signal crossing a chosen voltage level on a rising or falling edge.

By synchronizing each sweep to the same point in the waveform, triggering makes repetitive signals appear stable and aligned on the screen. This is why a properly triggered signal looks “locked” instead of sliding or rolling.

If the waveform is unstable or jumping, it usually means the trigger level, source, or mode is not set correctly, or the signal itself is not repetitive enough for stable triggering.

Common Trigger Modes

Auto Trigger

The oscilloscope continuously updates the display even if no valid trigger condition is met. This is useful when you are first probing a signal and are not yet sure about its timing or stability.

Normal Trigger

The display updates only when the signal meets the defined trigger condition. If no trigger occurs, the waveform stays frozen. This mode is better for observing stable, repeating signals.

Single Trigger

Captures and holds one waveform event when the trigger condition is met. It is especially useful for detecting rare or one-time events like glitches, spikes, or startup behavior.

Edge Triggering

The most commonly used trigger mode. It activates when the signal crosses a set voltage threshold.

You can trigger on:

• Rising edge: triggers when the signal goes low → high
• Falling edge: triggers when the signal goes high → low
  

Recommended Animation

• Before triggering: waveform appears unstable, drifting or rolling across the screen
• After correct trigger setup: waveform locks into a steady, repeatable position

This transition helps users visually understand how triggering stabilizes the display and makes measurements meaningful.

How to Measure PWM Signals with an Oscilloscope

What Is a PWM Signal?

PWM (Pulse Width Modulation) controls power delivery by rapidly switching signals on and off.

PWM is widely used in:

• Motor control
• LED dimming
• Power management
• Arduino projects

Important PWM parameters include:

• Frequency
• Duty cycle
• Peak voltage

PWM Measurement Tutorial

Step 1: Connect the Probe

• Probe tip → PWM output
• Ground clip → GND

Step 2: Set the Time Base

Adjust the horizontal scale until several PWM cycles appear.

Step 3: Configure Trigger

Use:

• Edge Trigger
• Rising Edge

Step 4: Read Parameters

Measure:

• PWM frequency
• Duty cycle
• Voltage amplitude

Example Waveforms

• Arduino PWM signal
• DC motor PWM waveform

Quick Answer

To measure PWM signals accurately, adjust the time base and use edge triggering to stabilize the waveform and display duty cycle changes clearly.

Advanced Hanmatek Oscilloscope Features

FFT Spectrum Analysis

FFT converts waveforms into frequency-domain information.

FFT Applications

• Noise analysis
• Audio frequency analysis
• Power supply ripple testing
• Harmonic analysis

Practical FFT Examples

• Audio waveform spectrum
• Switching power supply noise

Recommended Illustration

• FFT spectrum screenshot

Protocol Decoding

Some Hanmatek oscilloscopes support serial bus analysis.

Supported Protocols

• UART
• SPI
• I2C

Applications

• Microcontroller debugging
• Sensor communication analysis
• Embedded systems development

Example

Arduino UART communication decoding.

Real-World Oscilloscope Projects

Project 1: Arduino PWM LED Dimming

Includes

• Wiring diagram
• PWM waveform
• Duty cycle explanation

Project 2: Switching Power Supply Ripple Measurement

Includes

• Probe grounding method
• FFT ripple analysis
• Fault diagnosis tips

Project 3: Automotive Sensor Signal Analysis

Includes

• Crankshaft sensor waveform
• Dual-channel timing analysis

Common Oscilloscope Problems and Fixes

Why Is There No Waveform?

Possible causes:

• Probe disconnected
• Channel disabled
• Incorrect time base
• Trigger not configured

Why Is the Waveform Unstable?

Solutions:

• Adjust trigger settings
• Improve grounding
• Use 10X probe mode

Why Are Measurements Incorrect?

Check:

• Probe ratio setting
• Probe calibration
• Coupling mode

Why the Hanmatek DOS1102 Is Great for Beginners

👉 Product Link: https://hanmatek.com/collections/oscilloscope/products/hanmatek-dos1102-110mhz-2ch-oscilloscope

The Hanmatek DOS1102 combines beginner-friendly controls with powerful debugging capabilities.

Key Features

• 110MHz bandwidth
• Dual-channel waveform analysis
• 1GSa/s sampling rate
• Built-in waveform generator
• FFT analysis support
• Compact desktop design
• Excellent value for money

Best Users for DOS1102

• Students
• DIY electronics makers
• Repair technicians
• Embedded developers
• Automotive hobbyists

👉 Check Latest DOS1102 Pricing

Common Mistakes Beginners Make When Buying an Oscilloscope

Mistake 1: Only Looking at Bandwidth

Sampling rate is equally important.

Mistake 2: Thinking One Channel Is Enough

Dual-channel oscilloscopes are far more useful for debugging.

Mistake 3: Buying Extremely Cheap Unknown Brands

Reliability and support matter for long-term use.

Conclusion: How Beginners Can Learn Oscilloscope Skills Faster

The fastest way to learn oscilloscope operation is through practical projects.

Recommended learning path:

1. Learn probe calibration
2. Practice trigger setup
3. Measure PWM signals
4. Explore FFT analysis
5. Debug real electronics circuits

The Hanmatek DOS1102 is an excellent beginner oscilloscope because it combines affordability, dual-channel analysis, and professional measurement features in a user-friendly package.

👉 Visit the Official Hanmatek DOS1102 Product Page