2b Doppler Tie-In & 3a VOR Flashcards
DVS was not designed to be used ______
Alone
DVS provides its three unstable aircraft reference output velocities to an external ________ _________
Navigational computer
This develops velocities into earth reference stabilized velocities
External navigation computer
The external navigation computer calculates what three things
Wind, present position, ETA (PEW)
When vector line of sight is selected, this system utilizes information supplied by the Doppler to point the radar in antenna in the direction of the actual track of the aircraft
Radar system
This is used to make corrections to the flight path
Auto pilot
The DVS system uses ______ & _______ to tie-in with other aircraft avionic Systems
1553B data bus
ARINC 429 
To determine the aircraft position by finding magnetic bearing to two or more VOR ground stations
VOR purpose
The ground station operation compares 2 signals what are they
30 Hz reference and 30 Hz variable
This signal is Omni-directional And uses FM and station identification tone
30 Hz reference
This signal uses cardioid pattern and AM
30 Hz variable
The operating principle of VOR is what
Phase comparison
The three types of ground stations are-
High altitude – enroute navigation
Low altitude – enroute navigation
Terminal – local navigation
What are the characteristics of each
High altitude= 200watts, 200NM, 112-117.95MHz, 18k-60k feet
Low altitude = 40NM, 112-117.95MHz, 0-18k feet
Terminal = 50 watts, 25NM, 108-111.85MHz

Low-flying aircraft are unable to receive the VOR signal if they are below the horizon. Because of this limitation VOR stations are placed no further than _______miles apart.
80
Stations sharing the same frequency are located at least 500 miles apart so they do not interfere with each other
How many total frequency channels are available
160, with 120 of those possible for enroute and 40 for terminal
