Test and measurement instruments and devices installed in legacy systems often face end of life, lack of replacement parts, and/or obsolescence. Ongoing maintenance and calibration cause countless project delays and costly waste of resources. Instrument substitution implies modifications and revalidation of the test and measurement software application mostly known as Test Program Sets (TPS). In most cases, changes to the software is impractical due to budget or scheduling impact (such as changes to hundreds of TPSs, recertification of the software, availability of source code, and/or secret clearance).Whether it is a Commercial Off-The-Shelf (COTS) or a customized hardware replacement, there is a need for an economical life extension method to the automated test and measurement system without software changes.