Spektra

Spektra is a native desktop app for macOS and Windows. Plug in a USB spectrum analyzer — from a ~€40 RTL-SDR stick up to HackRF, Airspy or SDRplay — and it sweeps the 470–700 MHz UHF wireless-mic band in seconds, drawing a live spectrum with a waterfall. Its Frequency Advisor then places 4 to 128 intermod-safe channels inside the gaps it measured, and prints the coordination sheet as an A4 PDF.

Who it is for

• Freelance FOH and monitor engineers walking into an unknown venue.
• RF techs on small and mid-size tours without a receiver-network rig.
• Festival stages, theatres and houses of worship sharing crowded spectrum.
• Rental companies prepping a kit with a coordination sheet in the case.

What makes it different

• Measured, not assumed. Planning tools coordinate against a database; Spektra coordinates against the room you are standing in.
• Three-state occupancy. Your own carriers (green), contention on your channel (amber) and unknown interference (red) — not a single threshold.
• Vendor-neutral, cheap hardware. Eight analyzer families are auto-detected on plug-in; no manufacturer receivers required.
• 27+ device families and 8 regulatory regions — group/channel picks resolve to exact MHz and each device gets a licence verdict.
• Fully offline and private. No telemetry, no cloud; spectrum data never leaves your machine.
• Try it first. A demo mode inside the app and a free browser demo on the platform, both on synthetic spectrum.

Pages in this guide

• Getting started — buy, activate, download, plug in, scan, coordinate.
• FAQ — hardware, bands, regions, updates.
• Troubleshooting — downloads, detection, thresholds.