VHF Data Link - Mode 2 (VDL-M2)

From Signal Identification Wiki
Jump to: navigation, search

VHF Data Link - Mode 2 (VDL-M2)
VDL2 Waterfallthmb.jpg
Frequencies 117.975 MHz,137 MHz
Frequency Range 117.975 MHz - 137 MHz
Mode RAW
Modulation PSK
ACF
Emission Designator
Bandwidth 25 kHz
Location Worldwide
Short Description VDL-M2 (Known as VDL2 or VDLM2) is a means of sending information between aircraft and ground stations. VDL Mode 2 is the only VDL mode being implemented operationally to support Controller Pilot Data Link Communications (CPDLC). An extension to the AVLC protocol permits ACARS over AVLC (AOA) transmissions. VDL-M2 is implemented by Eurocontrol.
I/Q Raw Recording Download file
Audio Sample

VDL-M2 (Known as VDL2 or VDLM2) is a means of sending information between aircraft and ground stations. VDL Mode 2 is the only VDL mode being implemented operationally to support Controller Pilot Data Link Communications (CPDLC). An extension to the AVLC protocol permits ACARS over AVLC (AOA) transmissions. VDL-M2 is defined in ICAO documents as “Annex 10 Volume III - Communication Systems” and ”Manual on VHFVery High Frequency (30-300 MHz) Digital Link (VDL) Mode 2” and implemented by Eurocontrol.

VDL-M2 uses D8PSK (Differentially Encoded 8-Phase Shift Keying) with 31.5 kbpsKilobits per second (kbps) speed at 25 kHzKiloHertz (kHz) 10^3 Hz bandwidth and 10500 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second..

Frequencies[edit]

  • 136.100 USA (ARINC)
  • 136.650 USA (ARINC)
  • 136.700 USA (ARINC)
  • 136.800 USA (SITA)
  • 136.675 Europe (ARINC)
  • 136.725 Europe (ARINC)
  • 136.775 Europe (SITA)
  • 136.825 Europe (ARINC)
  • 136.875 Europe (SITA)
  • 136.975 Worldwide (SITA & ARINC)

Decoding Software[edit]

Hobby Level Software


Professional Software

Decoding Tutorials[edit]

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]