Haasoscope Pro is a full redesign of the original Haasoscope—a successful Crowd Supply campaign from 2018—which was the first open hardware real-time USB oscilloscope. The new Pro version increases the bandwidth from 60 MHz to a whopping 2 GHz, the resolution from 8 to 12 bits, and the sample rate from 125 MS/s to an impressive 3.2 GS/s.

It’s the first open-source, open-hardware, affordable, high-bandwidth, real-time sampling oscilloscope. And just like with the original Haasoscope, you can flexibly combine and sync multiple Haasoscope Pros to interleave ADCs for a sample rate of 6.4 GS/s, or for additional channels.

Normal 10x passive oscilloscope probes are limited to under ~350 MHz of bandwidth. To unlock the full bandwidth of the Haasoscope Pro, this project also includes an inexpensive 2 GHz bandwidth active probe. Unlike professional models which sell for top dollar, Haasoscope Pro is designed to be affordable, made with standard PCBs, off-the-shelf components, and an open-source design.

Fast Signals, High Bandwidth

The oscilloscope is an indispensable tool for designing, testing, repairing, and learning about electronics. With its large bandwidth, the Haasoscope Pro will finally let hobbyists, designers, technicians, researchers, and students explore the world of high-frequency electronics, affordably. As any electronics enthusiast would understand, having an oscilloscope as capable as this on your bench is simply a dream come true.

Electronic parts that produce fast signals are inexpensive and commonplace. Microprocessors and even low-end FPGAs often have outputs with rise times of 500 ps or less. Standard protocols like USB 2.0, DDR3 RAM, HDMI, Ethernet, etc. all use signals with rise times of about 250 ps. Even simple digital logic chips can have 200 ps rise times.

Until now, users of devices and protocols such as these have been unable to see these signals accurately, unless they were lucky enough to get their hands on $20K of test equipment. A typical high-end consumer oscilloscope with 350 MHz of bandwidth can only see signals with rise times >1000 ps. (Recall that rise time ~ 0.35 / bandwidth.) Haasoscope Pro can get down to a 250 ps rise time (or 175 ps with two Haasoscope Pros using oversampling). Signal integrity can be validated, length matching between pairs can be measured, etc. You can also directly see RF signals up to 2 GHz, opening up the UHF, 433 MHz, 915 MHz, and even L bands.

Features & Specifications

Haasoscope Pro:

• 2 analog input channels
• 50 Ohm (<1 pF) or 1 MOhm (10 pF) input impedance
• 2 GHz analog bandwidth at 50 Ohm, 500 MHz at 1 MOhm
• 3.2 GS/s for 1 channel or 1.6 GS/s for 2 channels, doubled to 6.4 GS/s with two synced Haasoscope Pro's
• 12 bits of real-time vertical resolution per sample
• Up to 40k samples per trigger, with adjustable trigger time offset
• 100 ps/div to 24 hour/div, for 10 div
• Max analog input of +-5V (50 Ohm) or +-3V (1 MOhm), +-50V or +-30V with x10 probe
• Sensitivity of 1.6 V/div down to 8 mV/div, for 10 div, in x1 mode
• Programmable AC or DC input coupling
• Programmable DC offsets per channel
• External trigger in and aux trigger out
• Multiple Haasoscope Pros can be connected for more channels or to oversample at 6.4 GS/s, with synchronized timing and triggers
• Standard set of triggers (rising / falling edge, time over threshold, etc.), customizable in firmware
• Qt-based python software interface for Windows/Mac/Linux
• Standard set of signal measurements in software
• 5 V 1.5 A USB Type-C powered (or using 12 V 1 A 2.1 mm barrel connector)
• Aluminum case with quiet 40 mm internal fan
• 220 x 165 x 35 mm (8.66 x 6.5 x 1.38 in), 0.9 kg (1.98 lbs)

Active Probe:

• DC - 2 GHz analog bandwidth
• Flat response from DC -1 GHz within 0.3 dB
• 1 MOhm input resistance
• 1.1 pF input capacitance
• 100 Ohm minimum impedance, near 1.6 GHz
• x10 probe attenuation, input voltage range +-30V
• 50 Ohm SMA output, 1m cable
• 12 V power at ~80 mA, via 2.1 mm barrel connector, or 5V 200 mA USB using included cable

Open Source

Haasoscope Pro is fully open hardware, running open firmware, and uses open-source software. All hardware and firmware files are available on GitHub.
Additionally, design files for the Active Probe are accessible to anyone who wants to modify or study the design.

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