VOR

Question 1

How does a VOR generate a bearing

Answer 1

By phase comparison between 2 30Hz modulations

Question 2

What type of signal, what frequency does it operate and what type of modulation is:
1-reference signal
2-variable signal

Answer 2

1-omni directional, continuous wave, 9960Hz and FM
2-directional, 30Hz / 1800rpm and AM

Question 3

What type of antenna does the VOR use

Answer 3

Horizontally polarized dipole antenna

Question 4

How are the following errors caused
1-site
2-propagation
3-interference
how many degrees error is allowed with the:
4-VOR equipment in a/c
5-VOR station

Answer 4

1-buildings/uneven terrain
2-terrain in path of VOR at low alt reflects VOR signal
3-2 VORs transmitting on same frequency, received by a/c at same time
4-3°
5-1°

Question 5

What bearings are the following:
1-QDM
2-QDR
3-QUJ
4-QTE

Answer 5

1-Magnetic from a/c to station
2-Magnetic from station to a/c
3-True from a/c to station
4-True from station to a/c

Question 6

What type of frequency and Wavelength do VORs operate

Answer 6

Wavelength: metric
Frequency : VHF

Question 7

What signal does the VOR station emit

Answer 7

A non directional signal FM at 30Hz

Question 8

What effects the max range of a VOR

Answer 8

The height of the station

Question 9

What happens to the EHSI when the VOR fails

Answer 9

The deviation bar is removed

Question 10

Is the cone of confusion greater/smaller with VORs compared to NDBs

Answer 10

Greater with VOR than an NDB

Question 11

What error is reduced with a doppler VOR

Answer 11

Site error

Question 12

What is the directional signal of a VOR also known as

Answer 12

A limacon