Amplitude Modulation (AM)

From Signal Identification Wiki
Jump to: navigation, search

Amplitude Modulation (AM)
AM radio.jpg
Frequencies 137 MHz,153 kHz
Frequency Range 153 kHz - 137 MHz
Mode AM
Modulation AM
ACF
Emission Designator
Bandwidth 10 kHz
Location Worldwide
Short Description Long range commercial broadcast and international radio. Also used for aviation communications.
I/Q Raw Recording Download file
Audio Sample

Long range commercial broadcast and international radio. Also used for aviation communications (military and civilian) and CB radio in some countries. High powered international stations can be received from all around the world with a sufficient antenna system.


Click Here to Hear AM Radio Live at WebSDR Univ. of Twente[edit]

Samples[edit]

AMAmplitude Modulation Aviation
135.9 MHzMegaHertz (MHz) 10^6 Hz
Aviation AM.jpg

Auckland Aviation:

Frequencies[edit]

Long wave – 153 kHzKiloHertz (kHz) 10^3 Hz to 279 kHzKiloHertz (kHz) 10^3 Hz

Medium wave – 531 kHzKiloHertz (kHz) 10^3 Hz to 1611 kHzKiloHertz (kHz) 10^3 Hz in ITU regions 1 and 3 and 540 kHzKiloHertz (kHz) 10^3 Hz to 1610 kHzKiloHertz (kHz) 10^3 Hz kHzKiloHertz (kHz) 10^3 Hz in ITU region 2.

Short wave – 2.3 MHzMegaHertz (MHz) 10^6 Hz to 26.1 MHzMegaHertz (MHz) 10^6 Hz

Civilian Aircraft - 108 MHzMegaHertz (MHz) 10^6 Hz to 137 MHzMegaHertz (MHz) 10^6 Hz

Military Aircraft - 108 MHzMegaHertz (MHz) 10^6 Hz to 144 MHzMegaHertz (MHz) 10^6 Hz, 225 MHzMegaHertz (MHz) 10^6 Hz to 400 MHzMegaHertz (MHz) 10^6 Hz

CB Radio - 26.965 MHzMegaHertz (MHz) 10^6 Hz to 27.405 MHzMegaHertz (MHz) 10^6 Hz (25.6 MHzMegaHertz (MHz) 10^6 Hz to 27.995 MHzMegaHertz (MHz) 10^6 Hz in some countries)

Decoding Software[edit]

Any software with AMAmplitude Modulation mode for listening.

For C-QUAM AMAmplitude Modulation Stereo, SoDiRa seems to be the only software capable of decoding AMAmplitude Modulation stereo. Demo version is free.

Automatic detection

Antennas[edit]

Broadcast AMAmplitude Modulation is vertically polarized. However, at HFHigh Frequency (3-30 MHz) and lower frequencies signal bounce may allow horizontally polarized antennas to pick up signals as well.

Aviation AMAmplitude Modulation is vertically polarized.

Video Examples[edit]

Additional Images[edit]