The National Institute of Standards and Technology (NIST) is conducting market research to identify vendors capable of supplying a Real-Time Spectrum Analyzer, with the goal of determining potential small business set-aside opportunities. This is a sources sought notice, not a solicitation, and no contract will be awarded from this announcement. Responses must be submitted electronically to the contract specialist by the date and time specified in the notice, with capability statements limited to four pages. The product must be manufactured in the U.S., and the applicable NAICS code is 334515 with a 750-employee size standard. No budget amount or performance location is specified in this description.