(K)Element 3-71 Automatic Direction Finding Equipment (ADF) & Transponders

Question 1

What is the frequency range of an aircrafts ADF equipment?

Answer 1

190 khz to 1750 khz

Question 2

What is meant by the term night effect when using an aircrafts ADF equipment? Night effect refers to the fact that

Answer 2

Non directional beacon NBD can bounce off the earths inosphere at night and be received in almost any direction

Question 3

What are the transmit and receive frequencies of an aircrafts mode C transponder operating in the ATC RADAR Beacon System?

Answer 3

transmits 1090 Mhz and receive at 1030 mhz

Question 4

In addition to duplicating the finctions of a mode C transponder, an aircrafts mode S transponder can also provide

Answer 4

mid air collision avoidance capabilities

Question 5

What type of encoding is used in an aircrafts mode C transponder tranmission to a ground station of the ATCRBS?

Answer 5

pulse position modulation

Question 6

Choose only the correct statement about an aircrafts ADF equipment?

Answer 6

An aircraft’s ADF antennas can receive transmissions that are over the Earth’s horizon (sometimes several hundred miles away) since these signals will follow the curvature of the Earth