VOR SYSTEM - FLIGHT COMPARTMENT COMPONENT LOCATION

VHF OMNIDIRECTIONAL RANGING (VOR) SYSTEM

Purpose

The VHF omnidirectional ranging (VOR) system is a navigation aid that gives magnetic bearing data from a VOR ground station to the airplane.

The VOR ground stations transmit signals that give magnetic radial information from 000 degrees to 359 degrees. All VOR stations reference the 000 degree to magnetic north.

Abbreviations and Acronyms

· ACP - audio control panel

· DEU - display electronic unit

· DFCS - digital flight control system

· DME - distance measurement equipment

· EFIS - electronic flight instrument system

· FCC - flight control computer

· FDAU - flight data acquisition unit

· FMC - flight management computer

· HSI - horizontal situation indicator

· ILS - instrument landing system

· LCD - liquid crystal display

· MCP - mode control panel

· NAV - navigation

· NCD - no computed data

· PWR - power

· RDMI - radio direction magnetic indicator

· REU - remote electronic unit

· RF - radio frequency

· RMI - radio magnetic indicator

· VOR - VHF omnidirectional ranging.

GENERAL DESCRIPTION

General

The VOR system has two VOR/marker beacon (VOR/MB) receivers. The receivers have VOR and marker beacon functions. This section covers only the VOR operation of the VOR/MB receivers.

Description

The navigation (NAV) control panels give manual tune inputs to the VOR/MB receivers. There are two NAV control panels, one for the captain and one for the first officer.

RF signals from the VOR/LOC antenna go through power dividers, then to the VOR/MB receivers. The VOR/MB receivers use the RF signals to calculate station bearing and decode the morse code station identifier signal and station audio. The receivers send VOR bearing to the remote magnetic indicator (RMI). You can select the RMI bearing pointers to show VOR or ADF station bearing with the RMI bearing pointer selectors.

The receivers send VOR bearing data to the display electronic units (DEU) for display. The NAV select switch lets the crew select VOR/MB receiver 1 or VOR/MB receiver 2 as the source for the captain and first officer displays.

The receivers send station audio and morse code station identifier signals to the remote electronic unit (REU).

The receiver sends VOR bearing data to the FCCs for the DFCS VOR/LOC mode of operation. The bearing data also goes to the FMCS as a radio navigation aid for present position calculations.

VOR SYSTEM - FLIGHT COMPARTMENT COMPONENT LOCATION

General

These are the components in the flight compartment that interface with the VOR system:

· Captain’s primary and secondary EFIS displays

· Left and right EFIS control panels

· First officer’s primary and secondary EFIS displays

· Captain’s and first officer’s NAV control panel

· Captain’s and first officer’s audio control panel

· VHF NAV transfer switch.

VOR SYSTEM - ANTENNA AND ELECTRONIC EQUIPMENT COMPARTMENT COMPONENT LOCATIONS

General

The VOR/LOC antenna is at the top of the vertical stabilizer. VOR/MB receiver 1 is on the E1-2 shelf and VOR/MB receiver 2 is on the E1-4 shelf.

Date: 2015-12-24; view: 3030