DME SYSTEM - OPERATION - CONTROLS

General

The audio control panels (ACP) permit the crew to hear the DME station identification signals. The identification signals are 1350 Hz.

The EFIS control Panel mode selector switch selects the NAV display modes that show DME distance.

Audio Controls

Set these controls on the audio control panel to listen to DME audio:

· Push ON the NAV receiver volume control (NAV 1 for DME 1 and NAV 2 for DME 2)

· Select B (both) or R (range) on the voice range filter switch

· Set the NAV receiver volume control.

The voice/range selector permits you to hear DME audio. You will hear the DME audio when the voice/range selector is in the R or B position.

EFIS Controls

The EFIS control panel mode selector switch must be in the VOR/ILS position to show DME distance on the top right of the ND.

You put the VOR/ADF 1 switch to VOR 1 to show DME 1 in the lower left corner of the ND. DME 2 shows in the lower right corner of the ND when the VOR/ADF 2 switch is put to VOR 2.

DME SYSTEM - DISPLAY

Normal PFD Display

The left PFD shows DME 1 data. The right PFD shows the DME 2 data. The DME distance display shows in white letters and numbers.

Normal RDMI Display

The radio distance magnetic indication (RDMI) on the captain’s primary electronic flight instrument (EFIS) display shows DME distance. The first officer’s RDMI on the secondary EFIS shows the DME distance.

The RDMI show DME 1 distance above the DME1 legend on the left side and DME 2 distance on the right side above the DME2 legend.

The DME distance display shows in white letters and numbers.