Amateur Extra › E8 Signals and Emissions › E8B04
E8B04
What is the modulation index of an FM phone signal having a maximum carrier deviation of plus or minus 6 kHz if the highest modulating frequency is 2 kHz?
Pick an answer to check it.
Answer: B. 3
Modulation index = deviation / modulating frequency = 6 kHz / 2 kHz = 3.
Tip: 6 / 2 = 3.