Key Topic 41: Antenna to Display Interface

Question 1

8-41E1: The position of the PPI scope sweep must indicate the position of the antenna. The sweep and antenna positions are frequently kept in synchronization by the use of:

A. Synchro systems.
B. Servo systems.
C. DC positioning motors.
D. Differential amplifiers.

Answer 1

A. Synchro systems.

Question 2

8-41E2: On a basic synchro system, the angular information is carried on the:

A. DC feedback signal.
B. Stator lines.
C. Deflection coils.
D. Rotor lines.

Answer 2

B. Stator lines.

Question 3

8-41E3: What is the most common type of antenna position indicating device used in modern RADARs?

A. Resolvers.
B. Servo systems.
C. Synchro transmitters.
D. Step motors.

Answer 3

A. Resolvers.

Question 4

8-41E4: Which of the following statements about antenna resolvers is correct?

A. Most resolvers contain a rotor winding and a delta stator winding.
B. Resolvers consist of a two rotor windings and two stator windings that are 90 degrees apart.
C. The basic resolver contains a rotor winding and two stator windings that are 90 degrees apart.
D. Resolvers consist of a “Y” connected rotor winding and a delta connected stator winding.

Answer 4

C. The basic resolver contains a rotor winding and two stator windings that are 90 degrees apart.

Question 5

8-41E5: An antenna synchro transmitter is composed of the following:

A. Three rotor and two stator windings.
B. Two rotor and three stator windings.
C. Three rotor and three stator windings.
D. A single rotor and 3 stator windings.

Answer 5

B. Two rotor and three stator windings.

Question 6

8-41E6: RADAR antenna direction must be sent to the display in all ARPAs or RADAR systems. How is this accomplished?

A. 3-phase synchros.
B. 2-phase resolvers.
C. Optical encoders.
D. Any of the above.

Answer 6

D. Any of the above.