RF Scanner

Frequency range

Start MHz

Stop MHz

Scroll = zoom at the cursor · shift-scroll or two-finger sideways = pan · drag a box to zoom to it · click to mark · click a band in the strip to jump to it. Arrow keys pan, +/− zoom.

Band presets

Sweep

Points

On the device: 112 pts ≈ 4 sweeps/s · 512 ≈ 1/s · 1024 ≈ one every 3 s. Use 112 to scan, more to inspect.

Avgsweeps

Traces

Live

Max hold

Average

Deviation band (min–max)

Risk gauge

Band strip

Level axis

TopdBm

BottomdBm

Waterfall

Centre —Span —RBW — Floor —Strongest —Sweep —

livemaxavgmic presetsintermod

Signals on air

MHz	dBm	Rel.	Grade	Type

Grade = level above the noise floor. Width guesses type (≈7 MHz = TV, ≈200 kHz = mic). Click a row to mark it.

Marker

Freq—Live—Max—Above floor—Deviation—Risk—

Clear channels

Scanning…

Wireless system in use

Built-in table knows band ranges for common Sennheiser / Shure systems (no presets). The AI lookup uses web search to fetch the band range and factory preset frequencies, then plots them on the x-axis: clear / marginal / occupied judged against the current scan.

Transmit frequencies (MHz)

GuardMHz — a product this close to a used freq is a hit

Orders 2T3O 3T3O 2T5O

Claude API

Model

Where

Calls api.anthropic.com straight from the browser. Your key never leaves this page except to Anthropic.

Identify what's on air

Risk gauge zones (at receiver antenna)

Reference field strengths

Source	Est. dBm

Free-space estimates at 600 MHz into a 0 dBi whip, line of sight, no cable loss. Real rooms vary ±10 dB — treat as rules of thumb. Edit in the REFS table in the source if you want your own numbers.

Equipment thresholds

Receiver	Usable from	Interferer trouble above

"Trouble above" = an unwanted signal on or next to your channel at this level will start squelching / dropping / muting that kind of receiver.