USB-SA124B — 12.4 GHz Spectrum Analyzer

USB-SA124B — 12.4 GHz Spectrum Analyzer


The Signal Hound USB-SA124B is a 12.4 GHz Software Defined Radio (SDR) optimized as a spectrum analyzer.


All Signal Hound devices are calibrated to better-than-box specs during production. However, if you require a signed calibration certificate with a printed packet of calibration data, you will need to select it below:

    The Signal Hound USB-SA124B is a Software Defined Radio (SDR) optimized as a 12.4 GHz spectrum analyzer. It is compact, simple to use, and an effective troubleshooting tool for general lab use, engineering students, ham radio enthusiasts, and electronics hobbyists. Using recent innovations in RF technology, the Signal Hound has the sensitivity, accuracy and dynamic range you’d expect in a unit many times its cost.

    Upgrade your USB-SA124B to a Scalar Network Analyzer with our USB-TG124A tracking generator—or buy the two devices in a combo!


    • RF Frequency Range: 100 kHz to 12.4 GHz
    • Wide dynamic range: -151 dBm to +10 dBm
    • Resolution bandwidths (RBW) of 0.1 Hz to 250 KHz and 6 MHz
      • 6 MHz RBW available as an analog IF output centered at 63 MHz
        • Corresponds to U.S. analog / digital TV Channel 3
    • Includes a High Dynamic Range Measuring Receiver
      • 0.25 dB relative accuracy
      • 0 dBm to -125 dBm, 100 kHz to 1 GHz
      • 0 dBm to -115 dBm, 1 GHz to 4 GHz
      • Adjustable digital audio filters
      • Accurate AM and FM measurements
    • No external power supply needed – draws power from a dual USB cable
    • Powerful Digital Signal Processing happens on the PC
    • Software and Hardware included for one low price
    • Additional Third-Party Software Packages are available
      • TSCM software is available, and is being marketed
        as “Kestrel TSCM Software” through
    • Write your own software with our free Application Programming Interface (API)
      • I/Q Data up to a 240 KHz bandwidth
      • Frequency Sweeps up to 140 MHz per second
    • Compatible with Windows 7/8/10 32-bit and 64-bit operating systems.
    • AM and FM Demodulation Measurements
    • USB 2.0 communications at 480 MBPS
    • Demodulates AM/FM/SSB/CW audio in real-time
    • Automation capability using our API
    • Measures 8 inches long
    • Weighs 12 ounces

Device dimensions


USB-SA124B — 12.4 GHz Spectrum Analyzer - Standard

Weight.74 lbs (.34 kg)
Dimensions7.65" x 3.18" x 1.18" (19.4 x 8 x 3 cm)

USB-SA124B — 12.4 GHz Spectrum Analyzer - Option 2, Adds OCXO Timebase

Weight.74 lbs (.34 kg)
Dimensions7.65" x 3.18" x 1.18" (19.4 x 8 x 3 cm)

Product-in-packaging dimensions


Weight1.48 (.67 kg)


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Software and Drivers

Spike software

  • Spectrum analysis software for all Signal Hound spectrum analyzers.
  • Download and install the USB drivers separately.
  • Unzip (extract all files and run Spike Installer.msi and CDM v2.12.00 WHQL Certified.exe)

Signal Hound Software Development Kit

  • Programming interface for SA44 and SA124 devices.
  • Low level direct device control and measurements.

Product Manuals

Legacy Software

Software Installer Version 2.18B for the SA44B / SA124B / TG44A / TG124A. This is no longer the main installer for all SA and TG products for Signal Hound (for the latest software, see the Spike page). Individual files and manuals can be found below.

Additional Downloads

HDSDR Compatibility Files

Everything needed to use the HDSDR software with the SA44 and SA124 spectrum analyzers. Includes setup manual, interface files, and source.

Calibration Software

  • Signal Hound provides calibration software for the SA44B, which can be downloaded here.
  • Signal Hound can also calibrate and adjust the SA series spectrum analyzers. Contact Signal Hound for more information.
  • There is also a number of third party calibration labs which can perform calibrations for the Signal Hound products. For a full list of these calibration labs and their accreditation’s, click here.