| 释义 |
frequency modulation-frequency modulation frequency modulation-frequency modulation[′frē·kwən·sē ‚mäj·ə‚lā·shən ′frē·kwən·sē ‚mäj·ə‚lā·shən] (communications) System in which frequency-modulated subcarriers are used to frequency-modulate a second carrier. |