SI-9170A Sparrow Wideband Microwave 3U VPX Tuner

1 or 2 Channels, 70 MHz - 18.25 GHz Frequency Range, 500 MHz Bandwidth Tuner

The small yet powerful Sparrow is the optimal front-end tuner for both commercial and military systems that search, intercept and locate electromagnetic energy.  Key threat detection applications include COMINT, ELINT, ESM and EW operations. Configurable as a single or dual channel tuner, each channel covers the VHF, UHF and SHF spectrums with an input frequency range of 70 MHz to 18.25 GHz and a 500 MHz ultra-wide bandwidth.  Sparrow’s ability to see weak signals in the presence of strong interferers and superior signal fidelity all within a compact 3U VPX form factor, allows users to confidently deploy Sparrow in the most demanding signal environments and achieve performance that far exceeds larger products.

The Sparrow is backed by a standard three year warranty (some restrictions may apply). We are committed to providing outstanding product reliability and support so you can focus on mission success.



  • Easy System Integration - Sparrow’s simple command and control over standard Ethernet and/or PCIe Express interfaces allow developers to get Sparrow up and running quickly.
  • Best In-Class Performance Provided in a Low SWAP 3U VPX Form Factor - Weighing less than two pounds and consuming 42 watts of power in a dual-channel configuration, Sparrow is a dense low-SWAP tuner packing in high performance capabilities.
  • Independent or Phase-Coherent Operation - Each Sparrow 3U VPX card can be operated independently or phase-coherently on the fly with other 3U VPX Sparrow cards when deployed as part of a system through a single cable.



  • Military Applications - Sparrow is the optimal front-end tuner for military systems performing critical operations. COMINT, ELINT, EW and ESM applications are performed through independent or phase-coherent tuning across multiple 3U VPX units to search and locate sources of electromagnetic energy in order to detect and warn of threats.
  • Other Applications - Spectrum monitoring, testing and measuring radio frequencies and wideband spectral sensing, are a few of the applications supported by Sparrow that benefit both the defense and commercial industries.


Sparrow Microwave Wideband Tuner data sheet
The Thought-Leader in Microwave Technology

Sparrow is the newest microwave tuner boasting low phase noise and high dynamic range in a low SWAP package.

Download the Sparrow brochure

DRS Signal Solutions Product Catalog
SIGINT Tuners & Receivers

Suitable for commercial applications and adaptable for land, sea and air operations across a variety of platforms as well as tactical, man-portable capabilities.

Download the product catalog

ELINT Technology Keeps Pace With Threats

The complexity of threats is increasing worldwide, meaning that the electronic-intelligence (ELINT) technology to detect, recognize and counter them must keep pace.

Learn more