UNSPSC 32101535: Phase modulation circuit

A circuit network that makes the phase modulation wave with the phase changes, and simultaneously, the amplitude is also changed that it is refined with certain amplitude through the amplitude limiter and synthesizes the phase modulation circuit by the vector synthesis to the modulation wave with the changing size.

UNSPSC 32101535 Phase modulation circuit is a Commodity code that does not reflect the scope of work state and local governments are actually procuring. Recent opportunities tagged under this code span emergency responder radio coverage systems (distributed antenna systems, bi-directional amplifiers), Motorola radio equipment for law enforcement, bus radios for school transportation, ruggerized cellular routers for SCADA/IoT connectivity, RF shielded chambers for university engineering, and mercury float switches for water utility pump control—a fragmented set of electronics and communications equipment with no coherent relationship to phase modulation circuits. The City of Phoenix has posted two overlapping IFBs for in-building RF coverage enhancement (IFB-26-0355 due July 10, 2026, and the earlier IFB-26-0148 due April 30, 2026), both turnkey Emergency Responder Radio Coverage Systems procurements with five-year terms and DBE compliance requirements. The Rockwood School District in Missouri issued an RFP for 150 digital bus radios with DMR Tier 2 compliance and repeater equipment (due April 29, 2026). The County of Santa Clara posted a brief RFQ for Motorola radios and accessories for the Sheriff's Office (due June 17, 2026). Sourcewell, a Minnesota cooperative, issued a multi-state RFP for law enforcement equipment open to participating entities across Washington, Minnesota, and other jurisdictions (due June 16, 2026).

Geographic activity clusters in Arizona (Phoenix's repeated RF coverage solicitations), California (Santa Clara County), Missouri (Rockwood School District), Florida (Polk County School Board's ERCES inspection ITB in February 2026, Hillsborough County Water Resources' mercury float switch ITB in February 2026), and Wisconsin (University of Wisconsin-Madison's RF shielded chamber RFBs in January and February 2026), with a multi-jurisdictional cooperative procurement spanning the upper Midwest and Pacific Northwest. The code's recent posting pattern shows municipal and school district RF and communications equipment procurement as the dominant activity, though the code itself is poorly aligned with actual scope—suggesting either mis-tagging in the source database or a taxonomy that does not map cleanly to modern emergency communications and IoT infrastructure procurement. Bidders should investigate whether opportunities under this code actually target phase modulation circuits or whether they represent miscoded infrastructure and equipment solicitations better served by tracking communications systems, RF engineering, or emergency responder equipment codes directly.