Affordable, high-performing RF spectrum analyzers and signal generators.

Signal Hound spectrum analyzers were created for a very specific purpose: to provide high-quality RF spectrum analysis tools at a price that won’t break the bank. We have a few different models, but they all carry similar core features:

Powered over your PC’s USB connection (except the SM200B/C, which uses a power supply);

Signal Hound USB

Managed via Signal Hound’s robust (free!) spectrum analysis software;

Signal Hound Spike

Small enough to easily hold in one hand (okay, so the SM200B/C is a little bigger, but not much);

Signal Hound Small

Extremely powerful & capable, right out of the box!

Signal Hound Powerful

Signal Hound delivers unrivaled value in RF test and measurement equipment

Signal Hound products are designed to deliver accurate and thorough RF analysis measurements at a fraction of the cost of typical high-end test equipment. With today’s test equipment ranging from a few hundred dollars for low-end devices to over six figures for high-end products, Signal Hound aims to deliver quality and performance near the high-end, with a price trending down toward the low-end.

You don’t always need expensive or overly complex test equipment to get the job done. We build our devices to include the important features and functionality you’d find in higher-end tools, but keep things lean by leaving out the non-essential. We work hard to deliver accurate and powerful RF analysis capabilities for smaller budgets and to give larger budgets the opportunity to put more devices in the field without increasing spend.

Whether you’re needing EMC precompliance capabilities in a small two-person shop, or spectrum monitoring on a national scale, this test equipment is designed with you in mind. Accurate and powerful enough for mission-critical RF analysis, priced at a point accessible to most, and supported by a talented group of engineers committed to what they do – we truly believe that Signal Hound devices offer unrivaled value in the test equipment industry.

SM200C Spectrum Analyser

Spike, by Signal Hound.

This powerful, accurate RF analysis software is included with all Signal Hound’s spectrum analyzers.

It includes modes for real-time analysis, WLAN modulation analysis, noise figure measurements, EMC precompliance testing, digital demodulation, phase noise measurements, interference hunting, and more. This is available for free download from the Signal Hound website and is supplied on media with your analyser. Updates are regular and continue to be free! Windows and Linux versions are available.

Spike Monitoring the entire FM radio band


Download Spike direct from Signal Hound!

Software Development Kit (SDK)

By downloading you agree to the terms and conditions of the API License

About the Signal Hound SDK

  • Includes Spike and VSG60 SCPI programming manual and examples (Learn more about SCPI)
  • Includes Windows 64/32 bit C APIs/DLLs for SM200, SM435, BB60, VSG60, SA44, SA124, and VSG25 series devices
  • Includes 64-bit Linux .so builds for the SM200, SM435, BB60, and VSG60 APIs.
  • Includes C APIs for TG series devices (Windows 32/64bit and 64-bit Linux) Version 1.1.0
    • Direct control for the TG44 and TG124 devices (frequency/amplitude)
    • Linux API compiled on Ubuntu 14.04 (64-bit only)
  • Includes RF channelizer API
  • Includes VRT VITA-49 source code, manual, and examples (SM200)
  • Includes Spike sweep recording file (.SHR files) parser example
  • Perform 250MS/s I/Q acquisitions with complex triggering using the SM200B and SM435B segmented I/Q functionality


PC Requirements for the SDK:

  • Operating Systems
    • 64/32-bit Windows 7/8/10/11
      • VS2019 or VS2012 C++ re-distributables
    • Ubuntu 18.04/20.04
    • CentOS 7
  • Intel dual/quad-core i-Series processors recommended
  • Native USB 3.0 support
    • SM200AB, SM435B, BB60, VSG60
  • 10GbE connectivity
    • SM200C, SM435C
  • USB 2.0 support
    • SA44, SA124, TG44, TG124, VSG25
  • Signal Hound USB drivers installed for relevant devices.

Download the Signal Hound Software Development Kit

Current version posted on 2023-06-22—114.43 MB zip file


Firmware updater for all models of the SM200 and
SM435. You can see the current firmware version of your device in the
Spike status bar.

Read the release_notes before updating the firmware on your device.

Firmware Updater (9/2/2022)

SM200 STEP File Downloads

3D model files (CAD) of the exterior of the SM200A, B, and C, in the
Standard for the Exchange of Product Data (STEP) format. Perfect for
those needing the physical specs of the SM200-series devices for system
integration purposes.

SM200C STEP Files

SM200A/B STEP Files

SM435 STEP File Downloads

3D model files (CAD) of the exterior of the SM435B and SM435C, in the
Standard for the Exchange of Product Data (STEP) format. Perfect for
those needing the physical specs of the SM435-series devices for system
integration purposes.

SM435B STEP Files

SM435C STEP Files