frequency division data link
frequency division modulation
frequency division multiple access
frequency division multiplex
frequency division multiplex system
frequency division multiplex telegraph system
frequency division multiplexing
frequency division multiplexing technique
frequency division multiplier
frequency division modulation
frequency division multiple access
frequency division multiplex
frequency division multiplex system
frequency division multiplex telegraph system
frequency division multiplexing
frequency division multiplexing technique
frequency division multiplier
frequency division multiplex system