The specified operating range of 74.8–78.4 MHz input producing 2095–2195 MHz output corresponds to a multiplication factor of 28× (74.8 MHz × 28 = 2094.4 MHz and 78.4 MHz × 28 = 2195.2 MHz). Using a 75.000 MHz input signal, the measured output at 2.100000 GHz corresponds exactly to a multiplication factor of 28× (75 MHz × 28 = 2100 MHz). This confirms that the device is operating as designed within its intended frequency range, producing output in the center of the specified S-band region.

Zeta Laboratories was a U.S.-based manufacturer of RF and microwave components, producing specialized modules such as frequency multipliers, converters, and oscillators for telecom, aerospace, and defense applications during the late 20th century. Public corporate records show Zeta Laboratories, Inc. active in California by at least the mid‑1990s, with a recorded incorporation date of November 7, 1995, and later listed as inactive. The exact founding of the original RF operation likely predates this filing, as was common for small microwave firms that reorganized corporately over time. By the mid‑2000s the company was no longer operating independently; its CAGE code (31260) is now associated with DRS Codem Systems of Sunnyvale, CA. Codem Systems was acquired by DRS in August 2005, and DRS itself became part of Leonardo (Finmeccanica) in 2008, reflecting the broader consolidation of the defense electronics industry during that period.