For two-way radio dealers, integrators, and FCC license holders
Senior RF expertise and FCC oversight for two-way radio dealers and license holders.
Software your bench signs into, not a retainer. The radio expertise and license oversight your operation needs, without the hire: source-cited answers from your own documents, the RF engineering math done for you, and proactive FCC monitoring that catches renewals and new activity in your area.
Engineering plans from $99 a month, FCC search and monitoring alone from $29. No credit card required. Cancel anytime.
- Portable in vehicle
- Portable in building
- Portable on street
- Mobile, roof antenna
- Edge of service
A live study of FCC license WQQS321: 451.7 MHz and 224 watts ERP from 620 feet up registered structure ASR 1210193. Every input came off the license; enlarge to see them.
Map: OpenStreetMap contributors, SRTM; style OpenTopoMap (CC-BY-SA)
No citation, no answer.
Deterministic math, never guessed arithmetic.
Weekly-refreshed FCC data.
The knowledge problem every operation has, and nobody staffs for.
The tech who could align anything with their eyes closed retires, and thirty years of judgment leaves with them. Most operations can't justify a full-time engineer either, so link budgets get eyeballed and intermod gets discovered after the interference complaint.
Sentinel RF is staff augmentation, not another tool to learn: senior-level answers grounded in your own documents, with the math done deterministically and every claim cited.
What your operation gets
Answers you can trust
Answers from your own library, cited every time.
Upload the manuals, procedures, and bulletins your operation already holds. Every answer names the document and page it came from, so a second-year tech can check it before touching a radio.
- Cites the exact document and page
- Says so when your library does not cover it
- Tune-up values carry a verify-against-revision reminder
Bench math, done right
Coverage studies and RF math, done for you.
Coverage over real USGS terrain, public-safety acceptance studies, backhaul paths, and channel screening against the FCC's own rules, with 45 calculators behind them. The math is deterministic, so it is checked, repeatable, and showable to a customer.
- LMR area studies, contours, and TSB-88 tile reliability
- Microwave paths, sectored CBRS sites, and receive-site surveys
- A letterheaded PDF and a Google Earth KMZ for every study, saved to reopen for the customer
FCC search
The FCC's license and tower records, on a map.
A full, weekly-refreshed copy of the FCC ULS licensing database and the antenna structure register, searchable without clicking through the FCC site mid-job.
- Search by callsign, licensee, FRN, frequency, or map area
- Leased spectrum and CBRS Priority Access Licenses, which most tools miss
- Every tower with an active FAA lighting NOTAM marked, nationwide
Proactive monitoring
Renewals and tower changes, flagged months ahead.
Put your licenses and your customers' on a watch list. Every renewal is flagged at 180, 90, and 30 days, and you hear about it when a watched tower changes owner, status, or height, or its lights go out.
- Renewal and construction deadline alerts
- Tower watch by ASR number or owner FRN, with a lighting outage log
- Area watches: new towers and licenses inside a radius or boundary
Three steps, and the bench has backup.
- 01
Send us your library
Drag in the manuals and bulletins you already own, or forward them to your private ingest address.
- 02
Ask in plain language
Ask the way you would ask a senior engineer. Every answer comes back with its document and page.
- 03
Let it watch the FCC
Add your callsigns and your customers'. Renewals and new activity arrive as alerts, months ahead.
Who builds it
Built by a two-way radio company, not a software company.
Sentinel RF is built by Stolz Telecom, a working two-way radio operation. The tools exist because we needed them on our own bench first, which is also why every screenshot here is a live system: the study at the top of this page runs on our own FCC license, from a registered tower, at the frequency, height, and power the license states. About Stolz Telecom.
Whether you run a two-way radio operation or hold the licenses.
Two-way radio dealers and integrators
A senior engineer and master bench tech on staff.
Cited answers from your own service library, the deterministic RF math, and the FCC tools, in one place, for every tech on your bench.
See the Engineering plans, from $99FCC license holders
Know what you hold, and never miss a renewal.
For municipalities, utilities, public-safety agencies, schools, hospitals, and any organization with callsigns on file: FCC search the easy way, and renewal alerts at 180, 90, and 30 days.
See Search & Watch, from $29See it on your own service manual.
Start a trial, load a service manual, and ask a real question from your bench. If it doesn't earn its seat, cancel anytime.
Your documents stay isolated to your operation. The platform is actively monitored, with automated offsite backups, so your library and history stay safe.