Don't take our word for it.

Upload a service manual. Ask a real bench question. See the citation. Try FCC search. Run the calculators.

14-day free trial. No credit card. Plans from $29/month.

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FCC search and license monitoring without the bench tools.

Sentinel RF Search and Watch: $29/month.
ULS search. ASR search. Renewal alerts at 180/90/30 days. Area monitoring. 3 seats. 14-day trial.

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Before you quote the tower, check TOWAIR.

Sentinel RF: enter coordinates and height, check FAA notification requirements before the proposal leaves the desk.

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RF coverage isn't a circle.

Sentinel RF runs Longley-Rice over real USGS elevation data. Coverage contours shaped by actual terrain. 50%, 90%, or 95% reliability. Point-to-point path studies. Interference contours.

Model the path before you promise the coverage.
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Know what's changing in your RF neighborhood.

Sentinel RF Area Watch: draw a radius or upload a boundary, monitor for new FCC licenses and antenna structures, filter by frequency band, get notified when something moves.

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An FCC license shouldn't expire because someone forgot to check a spreadsheet.

Sentinel RF License Watch sends renewal alerts at 180, 90, and 30 days out. Email and in-app. Weekly FCC data keeps the timing accurate.

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A full, weekly-refreshed copy of the FCC ULS and ASR databases in one workspace.

Search by callsign, licensee, frequency, or coordinates. Results on a map. No tab-switching mid-job.

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Finding intermod during design beats finding it after the interference complaint.

Sentinel RF: 3rd- and 5th-order intermod studies against your site frequency list. Documented, deterministic results before the system goes on the air.

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30 deterministic RF calculators in one workspace.

Link budgets. Coax loss. ERP. VSWR. Fresnel zones. Microwave paths. Intermod. Terrain-shaped coverage. Checked, repeatable, showable.

The AI explains the problem. The calculator does the math.

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"No citation, no answer."

Every Sentinel RF answer shows the source document and page. If the library doesn't cover the question, it says so rather than inventing a spec.

That's a different standard than a general-purpose AI.

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