A carrier frequency is a single radio frequency with steady amplitude.
Alone, it would sound like silence on a receiver.
This is the frequency that a radio receiver is tuned into.
To be of use in communication, this carrier wave has to be changed in time with another signal (usually audio), called 'Modulation'
It can be turned on and off using a Morse key.
It can be changed by shifting the frequency, FM.
It can be changed by varying the amplitude, AM.
It can be changed by adding or subtracting audio to the carrier. Single Side Band.
It can have data applied by shifting between two carrier frequencies. FSK. (Frequency shift keying.)
It's called a carrier, because it is the carrier of information without necessarily being the information itself.
Total Pageviews
Popular Posts
-
Having Space Constraint At Your QTH To Put Up An Antenna For HF Band?. Then Try Constructing This Magnetic Loop Antenna. D...
-
There is calculator for building magnetic loop antenna. Try this calculator, to see hows the performance before making you own magnetic loop...
-
Maybe some of us are regretting about their ISP ( Ex: Celcom broadband in Malaysia ) blocking ports for Echolink. This method also applicabl...
-
DroidPSK is an app for Android to decode and encode Ham Radio BPSK31 with the build in microphone/speaker or wired to your radio. A waterf...
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment