Measurement of FM Noise Spectra of Low-Noise VHF Crystal Controlled Oscillators
- 1 January 1966
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 15 (4), 202-211
- https://doi.org/10.1109/tim.1966.4313541
Abstract
The design and characterization of stable, low-noise crystal controlled VHF oscillators are described. Operating in the 60 MHz to 80 MHz frequency range, these oscillators have shown total rms frequency deviations of less than 4 parts per 1010 in a 5 kHz band. Noise characteristics have been determined from power spectra measurements, FM noise measurements, and phase noise measurements. The equivalent noise sideband power spectra corresponding to each method of measurement were calculated and compared to the spectra predicted by a very simple model of the oscillator circuit. Agreement within a few dB was found for the region within about 500 Hz of carrier frequency, but measured noise power was found to be considerably higher than predicted for higher baseband frequencies in the range from 800 Hz to 5 kHz. Measurement techniques and evaluation of data are presented.Keywords
This publication has 7 references indexed in Scilit:
- Some aspects of the theory and measurement of frequency fluctuations in frequency standardsProceedings of the IEEE, 1966
- Requirements on master oscillators for coherent radarProceedings of the IEEE, 1966
- The effects of noise in oscillatorsProceedings of the IEEE, 1966
- Frequency stability requirements for space communications and tracking systemsProceedings of the IEEE, 1966
- Performance of Precision Quartz-Crystal Controlled Frequency GeneratorsIRE Transactions on Instrumentation, 1962
- Miniature Transistorized Crystal-Controlled Precision OscillatorsIRE Transactions on Instrumentation, 1960
- Background Noise in Nonlinear OscillatorsProceedings of the IRE, 1960