Wireless

Design a matched Pi or T attenuator from target loss and impedance, then audit preferred resistor values, input match and power rating.

Calculate half-wave dipole total and per-leg cut lengths from frequency, shortening factor, and trim allowance with practical tuning guidance.

Estimate free-space path loss and received signal strength with link reserve, signal-to-noise ratio and Fresnel clearance for RF planning.

Estimate IIP3 and OIP3 with IM3 clearance and SFDR for an equal-tone RF test based on gain, noise bandwidth and detection margin.

Inspect a MAC or EUI address with normalized forms and first-octet flags plus special-use checks and optional vendor assignment evidence.

Estimate PCB microstrip impedance or solve finished trace width from stackup geometry, compare IPC-2141 and Hammerstad-Jensen, and test tolerance.

Calculate cascaded RF noise figure and receiver sensitivity from ordered gain and loss stages plus bandwidth, temperature and SNR.

Check public satellite TLE age, orbit class, and optional SatNOGS status before choosing a record for pass planning or fleet review.

Forecast observer-relative satellite passes from TLE data and compare rise times, elevation filters and sky direction in calendar-ready windows.

Prepare for U.S. Amateur Extra with 50-question exam-shaped rounds and answer review from the 2024–2028 pool with February 2026 errata.

Prepare for the U.S. General amateur radio exam with unofficial pool study, 35-question rounds and explanations for missed answers.

Practice for the U.S. Technician amateur radio exam with unofficial 2026–2030 pool study, 35-question rounds and missed-answer review.

Convert VSWR or return loss into exact RF mismatch values and power splits with support for reflection coefficient, reflected watts and review guidance.

Estimate a preliminary Wi-Fi access point count from coverage and busy-hour capacity with growth reserve, driver comparison and survey warnings.

Build a first-pass Wi-Fi channel plan across 2.4, 5 and 6 GHz access points with DFS filtering, PSC primaries and reuse warnings.