In the RF spectrum, what unit is used to express the range of frequencies?

In the RF spectrum, what unit is used to express the range of frequencies?

• A. Hertz (Hz)
• B. Decibels (dB)
• C. Ohms (Ω)
• D. Farads (F)

Answer: (A)

Frequency is how fast a wave oscillates, so we express the range of frequencies in hertz, meaning cycles per second. In RF, you’ll see the bounds written as Hz and its multiples (kHz, MHz, GHz), which makes it the natural unit for describing a band’s span. Decibels measure relative power or level, not how often a wave cycles. Ohms and farads correspond to resistance and capacitance, not frequency. For example, the FM band covers roughly 88 MHz to 108 MHz, which is 88,000,000 Hz to 108,000,000 Hz. So Hertz is the unit used to express the range of frequencies.

Frequency is how fast a wave oscillates, so we express the range of frequencies in hertz, meaning cycles per second. In RF, you’ll see the bounds written as Hz and its multiples (kHz, MHz, GHz), which makes it the natural unit for describing a band’s span. Decibels measure relative power or level, not how often a wave cycles. Ohms and farads correspond to resistance and capacitance, not frequency. For example, the FM band covers roughly 88 MHz to 108 MHz, which is 88,000,000 Hz to 108,000,000 Hz. So Hertz is the unit used to express the range of frequencies.