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Andy Haas’s Haasoscope Pro is an open-hardware, USB-connected oscilloscope specified for up to 2 GHz analog bandwidth—but only with its input set to 50 Ω. At 1 MΩ, the published bandwidth is 800 MHz. Its maximum stated sample rate also depends on whether one or two channels are active, so the headline figures need to be read alongside the instrument’s input and host setup.
What the Haasoscope Pro is
The Haasoscope Pro is a two-input oscilloscope designed by Andy Haas. It connects to a computer over USB and uses desktop software rather than operating as a standalone bench instrument. The project publishes materials for the hardware, FPGA firmware, and software, allowing users to inspect or modify the design.
That openness is useful for learning, adapting the instrument, and reviewing how it is built. It does not, on its own, verify the published measurement specifications. The figures below are product and project documentation claims; the reviewed material does not establish independent bench-test results or measured effective resolution.
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How to interpret the 2 GHz bandwidth claim
Crowd Supply lists 2 GHz analog bandwidth when the input is configured for 50 Ω, and 800 MHz at 1 MΩ. Those are different input configurations, not interchangeable ways to quote one bandwidth figure. Before connecting a signal, match the scope’s impedance setting to the source and measurement setup; impedance affects both loading and signal level.
#1 Best Overall
- 【Faster Sampling Speed】FNIRSI DSO152 handheld oscilloscope has a real-time sampling rate of 2.5 MS/s and a 200 KHz bandwidth. The 10 x probe can measure up to 800 VPP, which is equivalent to 280 V AC. Voltages up to 400 V can be measured
- 【Professional Designed 】The DSO152 automotive oscilloscope supports full trigger modes(Auto/Normal/Single). Works perfectly for both periodic analog signals and aperiodic digital signals. 2.8'' HD LCD display screen, a resolution of 320*240, clear to observe
- 【Portable Oscilloscope】Pocket oscilloscope is an Assembled finished Machine, lightweight and easy to carry, it can be used directly to avoid assembling welding process problems. Applicable to the maintenance industry and R&D education industry
- 【Easy Measuring】Equipped with efficient one-key AUTO setting of all parameters, the measured waveform can be displayed without cumbersome adjustment. Long press the AUTO button to quickly calibrate the baseline,fast measurement of waveforms
- 【Longer Battery Life】FNIRSI DSO152 digital oscilloscope has a built-in 1000 mAh high-quality lithium battery, which can be used continuously for about 4 hours after being fully charged. Type-C interface supports data transmission and charging, firmware upgrade
The product page lists two input choices: 50 Ω with input capacitance below 1 pF, or 1 MΩ at 10 pF. Published input ranges are ±5 V at 50 Ω and ±3 V at 1 MΩ. With an x10 probe, the page lists a range of ±30 V. These are documented product limits, not a reason to assume every probe and signal combination is safe. Check the manual, probe rating, coupling, and selected input configuration before measuring.
The Pro-be active probe is a separate accessory
The dedicated Pro-be active probe is specified as DC–2 GHz, with x10 attenuation, 1 MΩ input resistance, 1.1 pF input capacitance, and a 50 Ω SMA output. Its specifications belong to the probe, not to every probe that can be connected to the scope. Confirm the probe’s limits and the complete signal path before using it.
Rank #2
- 【Newly Version】The 2C53T is an upgraded version of the 2C23T, which improves the measuring range and adds math operation，cursor measurement，persistence mode，XY mode features
- 【2 Channel Oscilloscope】50 MHz bandwidth, 250 MSa/s sampling rate, 1 Kpts record depth, automatic measurement function, max voltage 400 V, vertical sensitivity 10mV/div-10V/div , support waveform image storage and export
- 【4.5-Digit 19999 Counts Multimeter】AC Voltage: 0-750 V, DC Voltage: 0-999.9 V, DC/AC Current: 0-9.999 A, Resistance: 0-19.99 MΩ, Capacitance: 0-99.99 mF, Continuity Measurement. Multi-function meter for professionals, schools and hobbyists
- 【Signal Generator】The maximum waveform output frequency can reach 50 kHz and a step of 1 Hz, and can output 13 waveforms
- 【Save function】one-click save, screening function. You can upload the saved image by connecting to PC via Type-C. You can easily compare the waveforms by displaying the reference waveform and the measured waveform on the same screen
Sample rate, channels, and record depth
The published real-time sample rate is 3.2 GS/s with one channel active and 1.6 GS/s with two channels active. Do not read 3.2 GS/s as the rate available on each channel in a two-channel measurement. The product page also describes expanding the setup by combining units, but a particular multi-unit configuration should be checked against its documentation rather than assumed to preserve a stated rate on every channel.
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The listed record depth is up to 40k samples per trigger. The product page also specifies 12-bit real-time vertical resolution. A nominal bit count describes the instrument’s advertised digitization resolution; it does not establish noise-free performance or effective number of bits. No independent effective-resolution measurement is established in the reviewed material.
Rank #3
- 【Key Specs】70 MHz digital oscilloscope with 4 analog channels, 1.25 GSa/s sampling, 12-bit vertical resolution and up to 25 Mpts memory depth—helps correlate multiple rails and timing signals with fine vertical detail.
- 【UltraAcquire & Search】UltraAcquire up to 1,000,000 wfms/s; 256-level intensity grading plus waveform search/navigation helps find intermittent glitches and review anomalies quickly using event/time/frame navigation.
- 【FFT & Decode】Peak detect captures glitches down to 1.6 ns; math includes FFT up to 1 Mpts, filters, and 41 automatic measurements. Standard serial trigger/decode supports CAN, RS232/UART, I2C, SPI and 4-bit parallel decode using analog channels.
- 【Connectivity & SCPI】LAN supports LXI‑C, browser Web Control and standard SCPI commands. USB Host/Device and HDMI improve documentation, data export and external display for lab or teaching use.
- 【Applications】Digital oscilloscope for switching power ripple/noise checks, embedded bring-up, sensor interface validation and protocol troubleshooting; 7" 1024×600 touch screen and Flex Knob support fast daily measurements.
Other documented features
Crowd Supply lists switchable anti-alias filtering, AC/DC coupling, programmable offsets, and external trigger and reference-clock connections. The instrument’s interface is described as a Qt-based Python application for Windows, macOS, and Linux. These are published capabilities; the documentation cited here does not provide independent performance measurements for them.
What you need to run it
The Haasoscope Pro depends on a host computer, installed software and driver, and an adequate power source. The repository’s quick-start describes a desktop release, the FTDI D2xx driver, a USB connection, and launching HaasoscopeProQt. It also documents a Python installation path for users who prefer that route.
Rank #4
- Cost-effective economy oscilloscope.
- Support arbitrary waveform output, 14 kinds of trigger modes, standard with 5 kinds of serial protocol triggers and decodes.
- Useful commissioning instrument for various fields such as communication, aerospace, national defense, embedded systems, computers, research and education.
- Package weight of the Product: 5.95 Pounds
- Choose an installation path. Follow the official Haasoscope Pro repository for either its downloadable desktop release or Python setup instructions.
- Install the USB driver. The quick-start calls for the FTDI D2xx driver before connecting and running the application.
- Provide sufficient power. The repository quick-start says to use at least 5 V/2 A USB power and suggests a powered hub or external adapter if the host port is inadequate. The Mouser-hosted safety sheet specifies 5 V DC with a minimum 2 A over USB-C and/or 12 V DC through the barrel jack. Follow the product documentation for the connection you use.
- Connect and launch the application. Connect the scope by USB, then launch HaasoscopeProQt as directed by the repository. If the unit does not start reliably, check the power source and connection against the documentation.
Software and project status
The repository organizes the ADC board, FPGA firmware, case panels, software, and subsidiary boards, and links to documentation and a separate active-probe repository. Its README identifies v32 firmware/software on the main branch and v32_test as a development branch. A maintainer discussion dated October 22, 2025 described 31.07-beta3 as current at that time. Because these references differ in date and context, consult the repository’s live releases and documentation for the version applicable to your installation.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThere is also a documented ngscopeclient integration: its driver connects to the Haasoscope Pro GUI over a LAN socket, and the GUI must be running first. The ngscopeclient manual gives 50 Hz as an update rate for moderate memory depth; this is a documented condition, not a guarantee across settings or record lengths. See the ngscopeclient oscilloscope driver manual for its integration details.
Best Value
- 【4-in-1】FNIRSI DPOS350P handheld oscilloscope 350 MHz bandwidth, 1 GSa/s, 47 Kpts depth, 8-16-bit resolution, 50,000 wfms/s refresh. 2 channel oscilloscope, 7" touchscreen, digital phosphor, X-Y mode, 2 mV/div ultra-sensitive, ZOOM, 12 auto measurements, cursor
- 【Spectrum Analyzer】FFT-based analysis from 200KHz–350MHz with 4K–32K FFT length. Includes harmonic markers, cursor readouts, real-time 2D/3D waterfall view for EMI checks and signal integrity analysis
- 【Frequency Response Analyzer】10Hz–50 MHz frequency range, 0–5Vpp amplitude, +2.5 V to -2.5 V offset, 20–500 frequency Count. Measures gain/phase/frequency—ideal for Bode plots, loop stability tests, and analog filter tuning
- 【DDS Signal Generator】Outputs 14 standard waveforms and clipped waveforms. 0–50 MHz frequency range, 1 Hz resolution. 0–5 Vpp amplitude, -2.5 V to +2.5 V offset. Adjustable duty cycle from 0.1% to 99.9%. Supports 500 custom clipping waveforms
- 【Smart Features & Portability】Stores 500 waveforms + 90 screenshots. Supports FFT display, 150M/20M hardware bandwidth limiter, auto power-off. 8000 mAh battery, USB-C charging. Engineered for lab and field use
Availability and published campaign figures
Crowd Supply’s campaign funded on April 10, 2025, raising $97,708 against a $50,000 goal. The page’s crawled listing showed a $999 price and in-stock ordering at that time. Those are historical campaign and listing figures, not confirmation of today’s price, stock, shipping destinations, or lead time. Check the Crowd Supply product page for current terms.
Who should consider it
The Haasoscope Pro may suit engineers and hobbyists who want a host-connected scope and value access to the underlying hardware and software. Its headline bandwidth is most relevant when the measurement uses the specified 50 Ω input configuration; users working at 1 MΩ should base expectations on the lower published bandwidth. Anyone comparing it with another oscilloscope should compare bandwidth at the same impedance, sample rate for the same number of active channels, record depth, input limits, probe setup, and software workflow. The available specifications do not support a performance ranking against alternatives.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
