FCC Exam Question: 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.
Correct Answer: B

Explanation: An antenna synchro transmitter precisely conveys angular position using electromagnetic induction. The three stator windings are a hallmark of synchro devices, typically spaced 120 degrees apart. These windings interact to create or sense a three-phase magnetic field whose voltage magnitudes encode the exact angular position of the rotor. While different synchro types have varying rotor configurations, a design with two rotor windings, as specified, allows for specific signal generation or sensing methods. This could include generating two distinct output phases from the rotor or providing specialized input/feedback mechanisms tailored for transmitting accurate angular data within an antenna rotation system, ultimately translating mechanical position into electrical signals.

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Includes Elements 1, 3, 6, 7R, 8, and 9.