Publication:
The design and performance of a circuit to measure the tuning error of single-side-band radio receivers

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Authors
Jones, David Allan
Subjects
Receiver tuning
Voice communication
Single-sideband communication
Frequency measurement
Frequency monitoring
Signal monitoring
Single-sideband receivers
Speech characteristics
Advisors
Myers, Glen A.
Date of Issue
1972-09
Date
September 1972
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In order to automatically tune a single-sideband (SSB) radio receiver to the carrier frequency of a voice-modulated, suppressed-carrier, single-sideband radio signal, the difference between the frequency of the suppressed carrier and the frequency of the local oscillator in the receiver must be determined. A circuit which generates a sinusoidal voltage of the same frequency as the tuning error is examined analytically and experimentally. The design of the circuit is based on the principle that vowel sounds in human speech are periodic. The inputs to the circuit are the audio output of the SSB receiver for which the tuning error is desired and the audio output of an envelope detector which amplitude demodulates the SSB radio signal. The envelope detector provides a reference signal which is a harmonic of the fundamental modulating frequency of the SSB radio signal. This reference signal and the SSB receiver audio are non-linear processed to generate the error voltage. Receiver tuning errors as small as 0.1 Hertz were measured using this circuit.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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