Beginner's Guide to Choosing an Oscilloscope: Fnirsi 2C23T vs Hanmatek 3-in-1

For someone who is new to the electronics world and interested in exploring electrical signals, the decision between the Fnirsi 2C23T and the Hanmatek 3-in-1 can be daunting. Both models are 2-channel oscilloscopes, but there are key differences that can affect your choice based on your budget and needs. Let's dive into the details to help you make an informed decision.

Choosing the Right Oscilloscope for Beginners

A beginner should consider multiple factors when choosing an oscilloscope, such as price, functionality, and frequency bandwidth. One of the primary considerations is the number of channels. Since both the Fnirsi 2C23T and the Hanmatek 3-in-1 offer 2 channels, you can compare different waveforms and signals effectively.

One channel is typically used for triggering, while the second channel allows you to explore various nodes and observe their behavior over time. Both these models also meet the basic requirements for a beginner, but there are differences in their specifications that you should consider.

Frequency Bandwidth and Cost Considerations

The main distinction between the Fnirsi 2C23T and the Hanmatek 3-in-1 lies in their frequency bandwidths. The Hanmatek 3-in-1 has a bandwidth of 100 MHz, while the Fnirsi 2C23T has a bandwidth of 10 MHz. For a beginner, the 10 MHz bandwidth may be sufficient for most basic applications, but it has limitations when it comes to observing high-frequency signals.

Here's what you can expect with a 10 MHz bandwidth:

Line power and audio signals can be fully observed. Almost all switch-mode power circuitry can be analyzed. Amateur digital logic to around 1 MHz clock-rate can be observed.

However, if you intend to work with faster logic, FET gate drivers, FM, and shortwave radio circuits, the 100 MHz bandwidth becomes essential. It allows you to capture transitions and signals that occur at higher speeds.

The lower cost of the Fnirsi 2C23T might make it seem like a more appealing option. However, losing it due to issues like excessive input voltage or electrostatic discharge (ESD) would mean losing less money. Nevertheless, if you are willing to invest a bit more, the 100 MHz bandwidth provided by the Hanmatek 3-in-1 can significantly enhance your ability to analyze a wider range of signals.

Exploring Alternative Tools

While traditional handheld oscilloscopes are great for on-the-go use, they can be limited in terms of features and functionality. An alternative solution is to consider PC/USB-based tools. These tools offer additional features such as logic analyzers, serial protocol analyzers, and signal generators at a more affordable price.

When evaluating PC/USB tools, there are several key factors to consider:

Sample rates: Ensure that the sample rate is high enough for your needs. Internal sample storage: This affects how much data the tool can store and process. Sample bitlength/resolution: A higher bitlength provides better data quality. Front-end design and isolation: Ensure the tool is well-designed and can handle your expected application.

Some popular brands offering excellent PC/USB tools include:

Siglent: Known for high-quality and reliable products. Saleae: Known for their advanced logic analyzers and serial protocol analyzers. Hantek: Offers a range of signal generators and oscilloscopes suitable for various applications.

By choosing a PC/USB-based tool, you can still perform almost all the functions of a traditional oscilloscope while enjoying additional features that can be invaluable in your learning journey.

Conclusion

The choice between the Fnirsi 2C23T and the Hanmatek 3-in-1 ultimately depends on your specific needs and budget. While the Fnirsi 2C23T is unbeatable in terms of price, the Hanmatek 3-in-1 with its 100 MHz bandwidth offers better performance for analyzing a wider range of signals. Additionally, exploring PC/USB-based tools can provide you with a more comprehensive set of features and higher flexibility. Start with something affordable, like the Fnirsi 2C23T, but keep in mind that investing the extra money in the Hanmatek 3-in-1 could pay off in the long run if you aim to expand your knowledge and skills in electronics.