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FM - frequency modulation
PM - phase modulation
1. FM
used to vary/change the instantaneous frequency of a carrier wave for transmission
2. PM
used to vary/change the instantaneous phase angle of a carrier wave for transmission
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∙ 12y ago
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Difference between FM and PM?
frequency of the carrier is varied in accordance to the message signal in FM. Fm receivers are less complex. in Fm lower frequencies produce variation to the modulation index. phase of the carrier is varied in accordance to the message signal in PM. Pm receivers require proper synchronization so it is complex. Modulation index is independent of audio frequency
How do you convert FM to PM and PM to FM waves?
In order to convert fm to pm, the modulation index must be set to be independent instead of having a variation. Then the receivers must be properly synchronized.
What are the differences between AM and FM radio?
The main difference between AM and FM radio is the dial-in number and the amount of static each receive. AM radio preceded FM radio, with FM becoming popular in the 1950s.
What in the time difference between Dubai and Armenia?
There is never a time difference between Dubai and Armenia. 4 PM GST = 4 PM AMT
What is the time difference between Ethiopian and KSA?
There is never a time difference between Ethiopia and Saudi Arabia. 3 PM AST = 3 PM EAT
What is the difference between PM and PM?
one means morning and the other means after noon
What is the difference between FM 21-11 and FM 4-25.11?
FM 21-11 is numbered in the old system. FM 4-25.11 is numbered in the new system. The book is the same.
What is the time difference between Egypt and rowanda?
There is never a time difference between Egypt and Rwanda. 2 PM EET in Egypt = 2 PM CAT in Rwanda
Difference between satellite radio and regular radio?
One of the main differences between satellite radio and FM radio is that there is a cost for satellite and FM is free. Satellite radio also does not operate using the same numerical AM and FM channels as FM radio.
What is the difference between est and central time?
1 pm
What is the time difference between 315 pm and 930 pm on the same day?
6 and 15 minetes
What is the time difference between the Philippines and Singapore?
There is never a time difference between Singapore and the Philippines. 8 PM SGT = 8 PM PHT
