In addition to frequency, which of the following is used to identify amateur radio bands?
The approximate wavelength in meters✓Правильный ответ
Traditional letter/number designators
Channel numbers
All these choices are correct
Объяснение
Amateur bands are named by their approximate wavelength in metres or centimetres, such as 2 metres or 70 centimetres, alongside their frequency limits. Amateur allocations are not divided into numbered channels and do not use traditional letter/number band designators, so the all-of-these answer is wrong.