VHF Data Link - Mode 2 (VDL-M2)
 | |
|---|---|
| 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]
- VDL2 Received with RTL SDR (RTL2832) and MultiPSK
- VDL2: See-and-Hear Radio v2.0 HD
- VDL2 with Multipsk VDL2 display and Planeplotter
- VDL2 Aircraft Tracking using RTL-SDR with MultiPSK
Additional Links[edit]
- WAVECOM VDL-M2 Data sheet
- Rockwell Collins, ARINC Information, VDL-M2
- Spench.net VDL Mode 2
- Wikipedia ICAO VDL Mode 2
- ETSI VHF air-ground Digital Link (VDL) Mode 2; Technical characteristics
- WAVECOM Database: VDL-M2
- World code listing ground stations VDL2 Multipsk file
