tool · spectrum
Band plan: who lives where on the dial
The spectrum is divided among services by the ITU and, here, by Anatel. The scale is logarithmic: each jump of the same size multiplies the frequency, otherwise the entire shortwave range would fit inside a single pixel. Tap a band to see what is in it.
Spectrum
Band details
Amateur radio limits are those of ITU Region 2, Brazil's region. Your license class (A, B, or C) may not include all bands or segments: check the Anatel Act before transmitting. Listening is free on any band, but recording and disclosing non-public communications is not.
Sources
The calculations run in your browser, nothing leaves here. Each formula was checked against the references below.
- ITU, Radio Regulations, art. 5 (band allocation table, Region 2)
- Anatel, Amateur Radio Service Regulations (Resolution 697/2018) and Bands and Classes Act
- IARU Region 2, HF band plan
- FT8 and WSPR frequencies: WSJT-X User Guide (Joe Taylor, K1JT)
- Law 4.117/1962, art. 56 (confidentiality of communications of services not intended for the public)