EIA

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EIA
EIA 5-tone.jpg
Frequencies 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
,800 MHzMegaHertz (MHz) 10^6 Hz800,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
800,000 kHzKiloHertz (kHz) 10^3 Hz
30,000 kHzKiloHertz (kHz) 10^3 Hz
30 MHzMegaHertz (MHz) 10^6 Hz
800,000 kHzKiloHertz (kHz) 10^3 Hz
800 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 30 MHzMegaHertz (MHz) 10^6 Hz30,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
30,000 kHzKiloHertz (kHz) 10^3 Hz
- 800 MHzMegaHertz (MHz) 10^6 Hz800,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
800,000 kHzKiloHertz (kHz) 10^3 Hz
Mode NFMNarrowband Frequency Modulation
Modulation MFSKMultiple Frequency Shift-Keying
ACFAutoCorrelation Function
Bandwidth 5 kHzKiloHertz (kHz) 10^3 Hz5,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
0.005 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.005 MHzMegaHertz (MHz) 10^6 Hz
kHzKiloHertz (kHz) 10^3 Hz
0.005 MHzMegaHertz (MHz) 10^6 Hz
Location Worldwide
Short Description EIA is a 5/6-tone selcall mode defined by the Electronics Industries Association in the United States. Also known as Motorola MetroPage.
I/Q Raw Recording
Audio Sample
EIA is a 5/6 tone selcall mode defined by the Electronics Industries Association in the United States. Also known as Motorola MetroPage.

Selcall (selective calling) is a type of squelch protocol used in radio communications systems, in which transmissions include a brief burst of sequential audio tones. Receivers that are set to respond to the transmitted tone sequence will open their squelch, while others will remain muted.

EIA has 15 tones to choose from, but only sends bursts of up to 5 or 6 tones. Each tone has a duration of 33 msmilliseconds (.001 of a second) per tone. The bursts transmit right before a radio transmission.

EIA Table.png


Samples[edit]

EIA Full Range EIA 5-Tones
EIA range.jpg
EIA 5-tone.jpg

Decoding Software[edit]

Hobby Level Software

Video Examples[edit]

Additional Links[edit]

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