Enhanced Digital Access Communications System (EDACS)
|Frequencies||160 MHz,450 MHz,700 MHz,806 MHz,870 MHz,896 MHz,941 MHz|
|Frequency Range||160 MHz - 941 MHz|
|ACF||edacs48: 60 ms, edacs96: 30 ms|
|Bandwidth||12.5 kHz,6.25 kHz|
|Short Description||EDACS is a trunked radio system developed by General Electric and Ericsson. EDACS was invented by General Electric in the mid-80s and is currently owned by Harris Corporation. Harris has announced that EDACS systems will no longer be supported by 2017.|
|I/Q Raw Recording||Download file|
EDACS is a trunked radio system developed by General Electric and Ericsson. EDACS was invented by General Electric in the mid-80s and then further engineered by Ericsson and is currently owned by Harris Corporation. Harris has announced that EDACS systems will no longer be supported by 2017, urging customers to switch to newer P25 systems.
EDACS is primarily seen with its trunking channels; the voice can either be analog FMFrequency Modulation or digitally encoded with AEGIS or ProVoice. AEGIS was the original format, but was soon replaced by ProVoice.
EDACS has three modes, Wideband, Narrowband, and Encrypted. Wideband EDACS is the most common form of this channel, and uses a 12.4kHz wide 9.6kbit/s trunking channel segmented on 25 kHzKiloHertz (kHz) 10^3 Hz wide channels, where Narrowband EDACS uses 6.25 kHzKiloHertz (kHz) 10^3 Hz 4.8kbit/s trunking on 12.5 kHzKiloHertz (kHz) 10^3 Hz wide channels. The Encrypted version of EDACS (called EDACS Security Key (ESK), M/A-COM's trademark name for this feature) is a variant of the Wideband EDACS format, using specially coded frames that require a specific security key for two EDACS radios to communicate.
Transmitted using GFSKGaussian Frequency-Shift Keying digital modulation over working channels at either 4.8kbit/s or 9.6kbit/s. EDACS is a type of ESMR (Enhanced Specialized Mobile Radio) network.
|EDACS 4800||EDACS 9600||EDACS Fire Disp. Callguard||Analogue FMFrequency Modulation Voice|
Frequency bands: 160 MHzMegaHertz (MHz) 10^6 Hz, 450 MHzMegaHertz (MHz) 10^6 Hz, 700 MHzMegaHertz (MHz) 10^6 Hz, 806 MHzMegaHertz (MHz) 10^6 Hz-870 MHzMegaHertz (MHz) 10^6 Hz, 896 MHzMegaHertz (MHz) 10^6 Hz-941 MHzMegaHertz (MHz) 10^6 Hz
- Hobby Level Software
- EDACS End of Life Announcement
- EDACS info
- ESMR Definition
- Introduction to Digital Professional Mobile Radio: EDACS
- EDACS White Paper
- Radioreference.com EDACS
- RadioScanner.RU EDACS-4800
- HFAsia EDACS