Investigation of the of the Quality of Frequency Modulation Produced by a Sinusoidal Variable Condenser (Classic Reprint) - Hardcover

Paul Richard Hoyt

Hardcover

ISBN 10: 0267702361 ISBN 13: 9780267702367

Publisher: Forgotten Books, 2022

Synopsis

Understand how a sinusoidal variable condenser affects frequency modulation in radio transmitters and what causes distortion

This description summarizes findings from a study that investigates how three factors can distort the reception current when frequency modulation is produced by a sinusoidal variable condenser. It explains how capacity changes relate to frequency and how the edge of the plates and the receiver’s position on the resonance curve influence distortion. The work also describes practical experiments and the apparatus used to measure modulation quality.

• Learn why the edge capacity effect may be negligible and how a nearly sinusoidal capacity variation can be achieved.
• See how distortion can arise from nonlinear relationships between capacitance and frequency and from using non-ideal portions of the resonance curve.
• Understand how researchers calibrate a sinusoidal variable condenser and compare resonance curves to quantify modulation quality.
• Discover how a wave-meter and tuned receiver help identify the presence and magnitude of frequency modulation in the transmitter output.

Ideal for readers of early radio engineering and measurements who want a practical look at how modulation quality is tested and interpreted.

This edition focuses on the setup, measurements, and interpretation of results, and it relates theoretical expectations to experimental observations, including how the maximum frequency shift corresponds to changes in capacitance and how the final modulation appears on a reception curve.

Edition details

• Publisher: Forgotten Books
• Publication date: 2022
• Language: English
• ISBN 10: 0267702361
• ISBN 13: 9780267702367
• Binding: Hardcover
• Number of pages: 60