Frequency-modulated phone is the name of the voice emission most used on VHF/UHF repeaters.
One thing you can you do if you are told your FM hand-held or mobile transceiver is over-deviating is to talk farther away from the microphone.
The part of a single-sideband signal that is above the carrier frequency is called the upper-sideband (USB).
The upper sideband is commonly used for 10-meter phone operation.
Frequency-shift keying an RF signal is the usual way to produce an HF RTTY signal.
Two advantages to using modern data-transmission techniques for communications are high transmission speed and communications reliability.