Modulator for tone and binary signals

Tones and binary information are transmitted as phase variations on a carrier wave of constant amplitude and frequency. The carrier and tones are applied to a balanced modulator for deriving an output signal including a pair of sidebands relative to the carrier. The carrier is phase modulated by a digital signal so that it is + or - 90 deg out of phase with the predetermined phase of the carrier. The carrier is combined in an algebraic summing device with the phase modulated signal and the balanced modulator output signal. The output of the algebraic summing device is hard limited to derive a constant amplitude and frequency signal having very narrow bandwidth requirements. At a receiver, the tones and binary data are detected with a phase locked loop having a voltage controlled oscillator driving a pair of orthogonal detection channels

Study of filtration mechanics and sampling techniques Annual technical summary report, phase 4, 1967-1968

Filtration mechanics and fluid contamination control in hydraulic system

Study of filtration mechanics and sampling techniques, phase 4 Annual report, 1967-1968

Filtration mechanics and fluid contaminatio

An evaluation of the post-ignition unblocking behavior of solid propellant aft-end ignition systems Final report

Determining postignition interactions between igniter and main motor flow by aft-end heated air simulation of solid propellant exhaus

An evaluation of aft-end ignition for solid propellant rocket motors

Performance evaluation of solid propellant rocket motor ignition to determine igniter design and parameters to avoid overpressurizatio

Population studies, local growth rates and reproduction of the pismo clam (Tivela stultorum)

Large samples collected, measured, and returned to the beach at monthly intervals at La Jolla, California, for five successive years showed an average initial set of 3 young clams per sq m in an area of 2000 sq m. The annual mortality has been from 67 to 75% for each year-class. Of an annual set of 6000, only 2000, 700, 170 and 50, respectively, have remained at the end of the first to fourth years. The length increases about 21 mm per year for the first two years of life and somewhat less thereafter. Less than one per cent survived long enough to reach the legal length of 127 mm...

Study of fluid transients in closed conduits annual report no. 1

Atmospheric density effect on computation of earth satellite orbit

Variable temperature study of the crystal and magnetic structures of the giant magnetoresistant materials LMnAsO (L=La, Nd)

Peer reviewedPublisher PD