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In just two years, SIGLENT introduced two oscilloscope models: the SHS800 series and the SHS1000 series. While the SHS800 starts at under 3000 RMB, the SHS1000 can reach up to five digits in price. Despite having similar specs—such as a 1G sampling rate, 60/100MHz bandwidth, and 2M memory depth—there's a noticeable price gap. This difference might leave many wondering why.
The answer lies in the name itself: the SHS1000 is a "fully isolated" handheld oscilloscope, while the SHS800 is a standard handheld model. The key word here is "isolation." Let’s take a closer look at what that means.
The SHS1000 series offers high isolation levels: CAT II 1000V and CAT III 600V between channels and to ground. In contrast, the SHS800 series only supports a 10X probe with a maximum rating of CAT II 400V, though optional probes can go up to CAT II 1000V and CAT III 600V. This clearly shows that the SHS1000 emphasizes true floating and isolation, which is crucial for safe and accurate measurements in complex environments.
Traditional oscilloscopes typically share a common ground reference, meaning all input signals are referenced to earth. Without a differential preamplifier or external isolator, this setup isn’t ideal for floating measurements. Isolated oscilloscopes, like the SHS1000, break this limitation by allowing each channel to have its own independent reference point, effectively creating a virtual ground.
This feature enables precise floating measurements and eliminates interference between channels—something ordinary oscilloscopes can't match. It makes the SHS1000 suitable for specialized applications where safety and accuracy are critical.
Currently, only a few international brands, such as Fluke, Tektronix, Agilent, and CHAUVIN ARNOUX, have developed this technology. However, SIGLENT was among the first to introduce isolated oscilloscopes to the market, even before some of these well-known companies. Today, it stands as the only Chinese company offering comparable products.
Speaking of safety ratings, let’s briefly explain the CAT (overvoltage level) classification:
- **CAT I**: Low-energy circuits, such as electronics.
- **CAT II**: Local electrical circuits, like appliances.
- **CAT III**: Fixed installations, such as power distribution.
- **CAT IV**: High-energy sources, such as utility lines.
The SHS800 supports up to CAT II 1000V, making it highly robust despite lacking full isolation. With a vertical sensitivity range from 2mV/div to 100V/div, a 1GSa/s real-time sampling rate, and 2M memory depth, it offers excellent performance at an affordable price. Many users find it to be a great value, with over 3,000 market quotes available.
Here are some key specifications of the SHS800 series:
| Oscilloscope Section | Model | Bandwidth | Storage Depth | Real-Time Sampling Rate | Equivalent Sampling Rate | Vertical Sensitivity | Time Base Range |
|----------------------|-----------|-----------|---------------|--------------------------|--------------------------|----------------------|------------------|
| | SHS806 | 60MHz | 2Mpts | 1GSa/s | 50GSa/s | 2mV–100V/div | 5ns–50s/div |
| | SHS810 | 100MHz | 2Mpts | 1GSa/s | 50GSa/s | 2mV–100V/div | 2.5ns–50s/div |
| | | | | | | | Scan: 100ms–50s/div |
Whether you're working on basic troubleshooting or more advanced testing, the SHS800 and SHS1000 series provide powerful tools tailored to different needs.