md-100;
The ACARS transmits on VHF frequencies when in range of VHF reception and automatically switches over to SATCOM when required.
The SATCOM antenna is on the top of the fuselage and can transmit to satellites in all but very high roll angles.
The ACARS is powered by the AC1 bus. The #3 VHF is powered by the DC1 bus.
Only #1 VHF is powered by the DC Essential bus. There are no communications equipment powered by the Hot Battery Bus.
Last edited by PJ2; 4th June 2009 at 01:19.