What is the approximate bandwidth of a VHF repeater FM voice signal?

The approximate bandwidth of a VHF repeater FM voice signal is typically between 10 and 15 kHz. This bandwidth is determined by the modulation characteristics of frequency modulation (FM) used for voice communications.

In FM, the bandwidth is primarily influenced by the modulation index, which is determined by the frequency deviation and the highest frequency of the audio signal being transmitted. For standard FM voice communications, the typical frequency deviation is about ±5 kHz, and considering the audio signal's frequency range (which generally extends to about 3 kHz for voice), this results in an overall bandwidth of around 10 to 15 kHz.

This bandwidth allows for clear voice transmission while minimizing interference with adjacent channels. Therefore, the value given correctly aligns with the practical requirements for FM voice communications in the VHF band, enabling reliable and efficient communication.