Automatic Link Establishment (2G ALE)

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2G ALEAutomatic Link Establishment - 3G ALE - ALE-400
Automatic Link Establishment (2G ALEAutomatic Link Establishment)
ALE2G.jpg
Frequencies 3068.0 kHzKiloHertz (kHz) 10^3 Hz3,068,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3.068 MHzMegaHertz (MHz) 10^6 Hz
,28312.5 kHzKiloHertz (kHz) 10^3 Hz28,312,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
28.313 MHzMegaHertz (MHz) 10^6 Hz
3,068 kHzKiloHertz (kHz) 10^3 Hz
3.068 MHzMegaHertz (MHz) 10^6 Hz
28,312.5 kHzKiloHertz (kHz) 10^3 Hz
28.313 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 3.068 MHzMegaHertz (MHz) 10^6 Hz3,068,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
3,068 kHzKiloHertz (kHz) 10^3 Hz
- 28.313 MHzMegaHertz (MHz) 10^6 Hz28,312,500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
28,312.5 kHzKiloHertz (kHz) 10^3 Hz
Mode USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables)
Modulation MFSKMultiple Frequency Shift-Keying
ACF
Bandwidth 2000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).kHzKiloHertz (kHz) 10^3 Hz
0.002 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.002 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.002 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description Automatic Link Establishment, 2G ALEAutomatic Link Establishment (Official designation MIL-STD-188-141A and/or MIL-STD-188-141B (Appendix A)) is the current standardized method of establishing connections between radio operators. Also known as FED-STD 1045, FED-STD 1049, and STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5066.
I/Q Raw Recording
Audio Sample
Automatic Link Establishment, 2G ALEAutomatic Link Establishment (Official designation MIL-STD-188-141A and/or MIL-STD-188-141B (Appendix A)) is the current standardized method of establishing connections between radio operators. Also known as FED-STD 1045, FED-STD 1049, and STANAGNATO Standardization Agreement (STANAG), defines processes, procedures, terms, and conditions for common military or technical procedures or equipment between the member countries of the North Atlantic Treaty Organization (NATO). 5066. Although an improved protocol exists (3G ALE), the vast majority of ALEAutomatic Link Establishment systems in use in the world at the present time are 2G ALEAutomatic Link Establishment.

Characteristics[edit]

2G ALEAutomatic Link Establishment uses 8 tone MFSKMultiple Frequency Shift-Keying at 125 bdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. with 250 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). shifts between tones for a total bandwidth of 2000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).


Operation[edit]

To reach a specific station, the caller enters the ALEAutomatic Link Establishment Address. On many ALEAutomatic Link Establishment radios this is similar to dialing a phone number. The ALEAutomatic Link Establishment controller selects the best available idle channel for that destination address. After confirming the channel is indeed idle, it then sends a brief selective calling signal identifying the intended recipient.

When the distant scanning station detects ALEAutomatic Link Establishment activity, it stops scanning and stays on that channel until it can confirm whether or not the call is for it. The two stations' ALEAutomatic Link Establishment controllers automatically handshake to confirm that a link of sufficient quality has been established, then notify the operators that the link is up.[1]

Frequencies[edit]

For Amateur Radio usage:


Decoding Software[edit]

Hobby Level Software


Professional Equipment/Software

Additional Links[edit]

Additional Images[edit]