What is the standard frequency separation between VHF FM channels?

The standard frequency separation between VHF FM channels is 20 kHz. This frequency separation is established to prevent interference between adjacent channels, ensuring clearer and more reliable communications. In the VHF band, this separation allows for efficient use of the spectrum by providing enough space to accommodate multiple channels without overlapping, which is critical for maintaining signal integrity in radio communications.

While options such as 10 kHz, 25 kHz, and 15 kHz might be relevant in different contexts or types of modulation, the specific standard that applies to VHF FM channels requires a separation of 20 kHz to effectively manage signal spacing and reduce potential interference. This standard is particularly important for maintaining the quality of voice transmissions and ensuring that operators can communicate successfully over these frequencies.