VDF - VHF Direction Finding - Ch 2

Question 1

VDF Arial

Answer 1

The most simple Nav aid that we will use
Capable of giving basic direction
Over head of will hit all of the receivers at once

Question 2

VHF DF

Answer 2

Very high frequency direction finding

Used by civilian light AC

118MHz - 137MHz

Can give magnetic or true bearings

Question 3

UHF - DF

Answer 3

Military Use

Can give magnetic or true bearings

Question 4

QDM

Answer 4

Magnetic bearing to the station

Question 5

QDR

Answer 5

Magnetic bearing from station

Question 6

QUJ

Answer 6

True bearing to the station

Question 7

QTE

Answer 7

True bearing from the station

Question 8

QDL

Answer 8

Receiving steering instructions

Question 9

QGH

Answer 9

DF controlled approach

Question 10

Range / Coverage.

Answer 10

D = 1.23 x (square root of Tx + square root of Rx)

Question 11

Errors

Answer 11

Heterodyne Noise - No bearing established - when 2 stations transmitting at the same time which gives an erroneous bearing

Multi - path signals or reflections

Question 12

Class Requirements

Answer 12

A: +/- 2 degrees
B: +/- 5 degrees
C: +/- 10 degrees
D: