Spectrum 30

Why do radio signals fade? How are radio, GPS and light connected? Spectrum 30 helps you explore the electromagnetic spectrum through visual lessons and hands-on experiments.

See an example. Predict what will happen. Change a setting and compare the result. Then check what you understand.

Follow a structured 30-day learning journey, with saved progress so you can return to your place. Built for curious learners, Soldiers, leaders and instructors who want an approachable way into the fundamentals.

EXPLORE THE CONCEPTS
• Compare illustrations of radio, infrared and visible light
• Change frequency and observe wavelength spacing
• Move an obstacle to compare possible wave behavior
• Hear an optional acoustic noise comparison, with a transcript
• Explore relay paths, shared dependencies and degraded-communications scenarios
• Predict, experiment and explain, with saved personal practice

SUPPORT TEACHING AND ASSESSMENT
Instructor prompts, handouts, practical standards and after-action review tools support a progressive 30-day training journey. Personal learning practice stays separate from formal instructor-assessed completion.

UNDERSTAND WHAT THE TOOLS SHOW
Built-in Explore activities and practice scenarios are educational simulations. The optional Magnetic Field Explorer uses the phone magnetometer to demonstrate relative magnetic-field changes; it is not an RF spectrum analyzer. Optional external sensor views display results supplied by a configured external sensor. No external sensor is required for the core course. The phone does not scan, decode, jam or validate live RF emitters.

Training progress, Explore settings, reflections and AAR notes are stored on the device. Training records are not automatically sent to a Spectrum 30 server. Users choose whether and where to export a summary. No account is required, and Spectrum 30 does not include advertising or behavioral analytics.

Spectrum 30 is an independent educational training product. It is not official doctrine and does not represent endorsement by the U.S. Army, the U.S. Department of Defense, or any government agency.