Andy Haas Is Back with the New Haasoscope Pro Open-Hardware 2GHz-Capable Oscilloscope

Professor of physics and open hardware enthusiast Andy Haas has launched a crowdfunding campaign for a low-cost yet high-performance USB oscilloscope, dubbed the Haasoscope Pro — offering 2GHz of bandwidth, 12-bit resolution, and 3.2 gigasamples per second (GS/s) for just $899.

"Haasoscope Pro is a full redesign of the original Haasoscope, a successful Crowd Supply campaign from 2018 that introduced the world's first open-everything USB oscilloscope," Haas explains of the project. "The new Pro version increases the bandwidth from 60MHz to an impressive 2GHz, the resolution from 8 to 12 bits, and the sample rate from 125MS/s to 3.2GS/s. It's the first open-everything, affordable, high-bandwidth, real-time sampling USB oscilloscope."

The base Haasoscope Pro is designed to work with standard ×10 probes and includes two analog input channels — but can't quite hit the claimed 2GHz bandwidth, with its 3.2GS/s sampling rate limiting you to 1GHz on a single channel or 500MHz on two channels. The secret: the design is modular, allowing two Haasoscope Pro units to be connected over a cheap Cat5 cable to combine their capabilities and work in tandem to deliver 6.4GS/s on a single channel for a full 2GHz bandwidth — or to run two channels at 3.2GS/s, or one at 3.2GS/s and two at 1.6GS/s, or all four inputs at 1.6GS/s.

In addition to its standard passive probe support, which will typically limit usable bandwidth to 500MHz, Haas has designed an active probe add-on for the Haasoscope Pro — the Haasoscope Pro-Be, rated to 2GHz and featuring a flat response from DC frequencies up to 1GHz. The probe includes 1MΩ input resistance and 1.1pF input capacitance, with a 100Ω minimum impedance near 1.6GHz.

Haas compares the open-oscilloscope favorably to proprietary devices like the Siglent SDS6204A and Uni-T UPO3502E, as well as the open-source ThunderScope — all of which it undercuts, in some cases by thousands of dollars. "Until now, scopes with bandwidths of 1GHz or more have primarily targeted the professional market, where price is of little concern, often costing tens of thousands of dollars," Haas explains. "Haasoscope Pro is designed to be low cost, while maintaining super-fast performance."

The crowdfunding campaign is currently live on Crowd Supply, with the Haasoscope Pro priced at $899 and the Pro-Be accessory priced at $159; all hardware is expected to ship in June this year. The hardware, firmware, software, and case design files, meanwhile, are all available on GitHub under the permissive MIT license.