Amateur Extra › E8 Signals and Emissions › E8B05
E8B05
What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 5 kHz if the highest modulation frequency is 3 kHz?
Pick an answer to check it.
Answer: D. 1.67
Deviation ratio = maximum deviation / highest modulating frequency = 5 kHz / 3 kHz = 1.67.
Tip: 5 / 3 = 1.67.