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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Improved diversity receiving system automatically utilizes the combined output from its two independent receiving channels /with cross- polarized receiving antennas/ to increase the reliability of maintaining the requisite phase lock for optimum signal reception. It is adapted for use with AM, PM, or narrow band FM signals.
Dynamic model for cycle slipping in first order locked loops
Cycle slipping performance of second order phase locked loop
Theoretical, and experimental studies on frequency locked loop outputs
Ground station phase locked servo system for decoding pulse position modulation signals from sounding rockets
Leakage of large diameter O ring seals on spacecraft air lock hatches
Effect of phase detector characteristics on phase lock loop design parameters
Handbook for designing ball lock mechanisms for use on space vehicles
Digital voltage controlled oscillator for phase lock loops using coherent frequency synthesizer
Minimum noise and maximum information bandwidths for phase locked loops in demodulated FM multiplexed subcarriers
Nonlinear transient behavior of second, third and fourth order phase locked loops from state space projections on hyperplanes
Cycle slipping in first order phase locked loop determined by input carrier plus noise model based on induced steps of plus or minus 2 pi
Gallium arsenide injection lasers, discussing external cavity coupling, phase locking, laser uniformity, dimensions and arrays
Threshold performance of phase locked loop demodulators
Phase locked results for low SNRs pertaining to phase errors probability, cumulative and variance distribution, including time intervals between cycle-slipping
Electrically coded piezoelectric lock mechanisms are strong, have few moving parts, are resettable, and are relatively unaffected by high magnetic fields. Codes are extremely difficult to circumvent.
Phase-locked-loop phase modulator has the capability of generating a 6.8MHz carrier at modulation indexes as high as 2.5, with a distortion of the demodulated signal of less than 5 percent. These characteristics are obtained without the use of multipliers.
Ball-lock-bolt separation system for aerospace applications