Element 8: Ship Radar Techniques

effective 6/25/2009

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8-E-41: Antenna to Display Interface

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:

Synchro systems.

Servo systems.

DC positioning motors.

Differential amplifiers.



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

Stator lines.

DC feedback signal.

Deflection coils.

Rotor lines.



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

Resolvers.

Servo systems.

Synchro transmitters.

Step motors.



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

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

Most resolvers contain a rotor winding and a delta stator winding.

Resolvers consist of a two rotor windings and two stator windings that are 90 degrees apart.

Resolvers consist of a "Y" connected rotor winding and a delta connected stator winding.



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

Two rotor and three stator windings.

Three rotor and two stator windings.

Three rotor and three stator windings.

A single rotor and 3 stator windings.



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

Any of the above.

3-phase synchros.

2-phase resolvers.

Optical encoders.





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Element 8: Ship Radar Techniques
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