EEVblog 1753 - Designing a 2000V Isolated Oscilloscope (Cleverscope)

Why It Matters

The scope targets engineers who must make accurate, safe measurements on live high‑voltage systems where isolation, low common‑mode injection and long‑distance fiber links are critical—enabling in situ testing on power supplies, motor drives and large platforms like aircraft wings. Its use of standard QSFP optical links and direct JESD204 data paths reduces complexity and cost while preserving high fidelity data capture.

Summary

CleverScope’s updated four‑channel isolated oscilloscope is designed for high‑voltage power‑electronics work, offering 2 kV isolation per channel, 200 MHz bandwidth, 500 MS/s sampling and a 14‑bit ADC. The instrument streams JESD204 ADC data directly over QSFP active optical cables to an FPGA, uses a 12‑layer PCB with extensive thermal management and controlled impedance traces, and includes an isolated signal generator and low common‑mode current power system. The design supports external digitizers via a switchable QSFP port, can run from an onboard battery pack, and is optimized for long fiber links up to ~30 m. Manufacturer emphasis is on measurement stability (constant 40°C thermal control), safety and flexibility for power‑electronics and motor‑drive testing.

Original Description

Bart from Cleverscope returns to discuss and show off designing a 2000V isolated oscilloscope, and demonstrates measuring high voltage GaN transistors and Solid State Transformers.

https://cleverscope.com/products/CS548

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