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Oct 4, 2012
10/12
by
Behrent, L. F. (Lewis F.)
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Topics: Signal generators., Electronic apparatus and appliances--Calibration.
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312
May 6, 2010
05/10
by
Hancock, J. C.; Totty, R. E
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Approximation problems in signal design
Topics: APPROXIMATION, COMMUNICATION THEORY, SIGNAL GENERATORS, APPROXIMATION METHOD, COMMUNICATION THEORY,...
Topics: manualslib, manuals, Psg signal generators, Agilent Technologies Manuals Inverter E8257D PSG
An apparatus and method for measuring the relative phase of echo signals in a multiple-echo system. A signal generator generates an exciting tone burst and subsequent tone bursts delayed in phase from the exciting tone burst. The exciting tone burst is gated into a transducer coupled to the multiple-echo system. Each subsequent tone burst is converted into a series of pulses. Each pulse triggers a sample/hold circuit to sample each echo signal. The samples of the echo signal are averaged and...
Topics: NASA Technical Reports Server (NTRS), ECHOES, SIGNAL GENERATORS, PATENTS, Froggatt, Mark E....
CONTENTS CHAPTER 1. Paragraph Page INTRODUCTION. Section I. Description of signal generator. Purpose and use 1 1 Application 2 2 Technical characteristics of Signal Generator 1-72-(*) 3 2 Description of major components 4 3 List of components 5 3 Packaging data 6 3 Differences in models 7 5 II. Installation and assembly Unpacking, uncrating, and checking 8 5 Installation, assembly, and interconnections 9 5 Removal from service 10 6 CHAPTER 2. Section I. OPERATING INSTRUCTIONS. Preoperational...
Topic: WWII,World War, 1939-1945,United States. Army,Technical Manual,United States. -- Army -- Handbooks,...
506
506
Sep 27, 2015
09/15
by
United States. War Department
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TM 11-307 Signal Generators I-72-G, H, J, and K, 1946-06-03 CONTENTS CHAPTER 1. Paragraph Page INTRODUCTION. Section I. Description of signal generator. Purpose and use 1 1 Application 2 2 Technical characteristics of Signal Generator 1-72-(*) 3 2 Description of major components 4 3 List of components 5 3 Packaging data 6 3 Differences in models 7 5 II. Installation and assembly Unpacking, uncrating, and checking 8 5 Installation, assembly, and interconnections 9 5 Removal from service 10 6...
Topics: WWII, World War, 1939-1945, United States. Army, Technical Manual, United States. -- Army --...
Significant progress has been made in the demonstration of a wide bandwidth green fiber laser. Previous reports have detailed the generation of wide bandwidth chaotic signals using fiber ring lasers. Amplification of these signals has also been reported, to power levels that allow frequency doubling from infrared (IR, 1064 nm) to green (532 nm). A free space optical system has been previously reported that performed frequency doubling of a continuous wave (CW) 1064 nm source. We now report...
Topics: DTIC Archive, CLARKSON UNIV POTSDAM NY, *OPTICAL RADAR, AMPLIFIERS, LASERS, POWER LEVELS, SIGNAL...
Analysis and measurement of terrestrial magnetism; study of rapid fluctuations of the geomagnetic field. Research was directed toward the study of rapid fluctuations of the geomagnetic field. An investigation was made of the characteristics and origins of the natural magnetic field fluctuations in the frequency range of approximately 0.01 to 50 cps with particular emphasis on frequencies from about 0.1 to 3 cps. Field records were made of the fluctuations. Early records obtained for analysis...
Topics: DTIC Archive, Linehan, Daniel, BOSTON COLL CHESTNUT HILL MA, *GEOMAGNETISM, *VARIATIONS, SIGNAL...
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262
May 22, 2011
05/11
by
NON
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A device for measuring turbulence in high-speed flows is provided which includes a micro-sensor thin-film probe. The probe is formed from a single crystal of aluminum oxide having a 14 deg half-wedge shaped portion. The tip of the half-wedge is rounded and has a thin-film sensor attached along the stagnation line. The bottom surface of the half-wedge is tilted upward to relieve shock induced disturbances created by the curved tip of the half-wedge. The sensor is applied using a...
Topics: DENSITY (MASS/VOLUME), FEEDBACK, FIBERS, SIGNAL GENERATORS, TRANSDUCERS, VIBRATION, FREQUENCY...
A multiplying video mixer system including a digital signal generator for generating at least one overlay signal and an attribute control bit corresponding to each of a plurality of pixels. A background signal generator generates input background signals to which the attribute control bits are applied to effect the input background signals with a desired opaque/transparent attribute. At least one video multiplier multiplies the overlay attribute signals and background signals to produce an...
Topics: NASA Technical Reports Server (NTRS), MIXERS, SIGNAL GENERATORS, VIDEO COMMUNICATION, PATENTS,...
Catalog of test equipment from Leader Instruments Corporation for the 1980-81 year. Has stapled on price list sheet.
Topics: Repair, Test Equipment, TV Repair, Video Repair, Catalogs, Leader, Measurement Equipment,...
This is the first bimonthly technical report on the NRL Synthetic Heterodyne Signal Processor. At the time of writing we are about to test a breadboarded version of NRL's Differentiate and Cross-Multiply circuit with a special low-noise signal generator which synthesizes the action of the synthetic heterodyne signal processor. The time spent on this project so far has been mainly devoted to assembling a stock of electronic components, designing and constructing low-noise amplifiers for use with...
Topics: DTIC Archive, BATTELLE COLUMBUS LABS OH, *Signal processing, Breadboard models, Signal generators,...
399
399
May 21, 2011
05/11
by
Singh, J.; Jerman, G.; Bhat, B.; Poorman, R
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Microstructure of wrought, laser, and electron-beam glazed NARloy-Z(Cu-3 wt.% Ag-0.5 wt.% Zr) was investigated for thermal stability at elevated temperatures (539 to 760 C (1,100 to 1,400 F)) up to 94 h. Optical and scanning electron microscopy and electron probe microanalysis were employed for studying microstructural evolution and kinetics of precipitation. Grain boundary precipitation and precipitate free zones (PFZ's) were observed in the wrought alloy after exposing to temperatures above...
Topics: GATES (CIRCUITS), PHASE LOCKED SYSTEMS, SIGNAL GENERATORS, SIGNAL TRANSMISSION, SOUND WAVES, STRESS...
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209
Jul 6, 2010
07/10
by
Kugath, D. A
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The performance capability was assessed of operators performing simulated space tasks using manipulator systems which had compliance and force feedback varied. Two manipulators were used, the E-2 electromechanical man-equivalent (force, reach, etc.) master-slave system and a modified CAM 1400 hydraulic master-slave with 100 lbs force capability at reaches of 24 ft. The CAM 1400 was further modified to operate without its normal force feedback. Several experiments and simulations were performed....
Topics: COMPUTER PROGRAMMING, ELECTRONIC EQUIPMENT, LIBRARIES, DEMODULATORS, ELECTROMAGNETIC WAVE FILTERS,...
Electronic signal generator data based on solid state concepts were simplified or refined to meet requirements, such as reliability, simplicity, fail-safe characteristics, and the capability of withstanding environmental extremes. Pulse generators, high voltage pulse generators, oscillators, analog signal generators, square wave signal generators, and special function signal generators are described.
Topics: NASA Technical Reports Server (NTRS), OSCILLATORS, PULSE GENERATORS, SIGNAL GENERATORS, CIRCUITS,...
A system using dual wavelength characteristics of light passing through a film being deposited was described to generate an output signal that changes rapidly at the point when the deposition process should stop or change. Photodetectors are used to sense the light intensity changes at the two wavelengths, and the monitored signal represents the ratio of their sums and difference signal strengths.
Topics: NASA Technical Reports Server (NTRS), DEPOSITION, THIN FILMS, WAVELENGTHS, LUMINOUS INTENSITY,...
Compact, light-weight, solid-state test set can be used to check signal conditioning modules while they are installed in system. Test sets may also be used to cycle ground computer, if it is suspected of malfunctioning, rather than using signal conditioners.
Topics: NASA Technical Reports Server (NTRS), MULTIVIBRATORS, SIGNAL GENERATORS, SOLID STATE DEVICES, TEST...
Low cost method is described for signal conditioning of pot-type transducers utilizing printed circuitry. Conditioner fits into standard rack, accommodates 56 channels, and can be operated by one attendant.
Topics: NASA Technical Reports Server (NTRS), POTENTIOMETERS (INSTRUMENTS), POWER CONDITIONING, PRESSURE...
A digital servocontrol system for random noise excitation of a test object in a reverberant acoustic chamber employs a plurality of sensors spaced in the sound field to produce signals in separate channels which are decorrelated and averaged. The average signal is divided into a plurality of adjacent frequency bands cyclically sampled by a time division multiplex system, converted into digital form, and compared to a predetermined spectrum value stored in digital form. The results of the...
Topics: NASA Technical Reports Server (NTRS), RANDOM NOISE, SERVOCONTROL, SIGNAL GENERATORS, DIGITAL...
A speed control system for a brushless Hall effect device equipped direct current (D.C.) motor is described. Separate windings of the motor are powered by separate speed responsive power sources. A change in speed, upward or downward, because of the failure of a component of one of the power sources results in a corrective signal being generated in the other power source to supply an appropriate power level and polarity to one winding to cause the motor to be corrected in speed.
Topics: NASA Technical Reports Server (NTRS), AUTOMATIC CONTROL, ELECTRIC MOTORS, HALL EFFECT, DIRECT...
This report describes the complete performance test as defined in the Equipment Test Plan for Navigational Set, TACAN, AN/TRN-41.
Topics: DTIC Archive, E-SYSTEMS INC SALT LAKE CITY UT MONTEK DIV, *NAVIGATIONAL AIDS, *TACAN, ATTENUATORS,...
A control system for a brushless DC motor responsive to digital control signals is disclosed. The motor includes a multiphase wound stator and a permanent magnet rotor. The rotor is arranged so that each phase winding, when energized from a DC source, will drive the rotor through a predetermined angular position or step. A commutation signal generator responsive to the shaft position provides a commutation signal for each winding. A programmable control signal generator such as a computer or...
Topics: NASA Technical Reports Server (NTRS), DIGITAL SYSTEMS, WINDING, COMMUTATION, SIGNAL GENERATORS,...
A high-precision counter using a digital signal processor (DSP) is designed for phase and frequency measurement. We use an analog-to-digital converter (ADC) to sample the device under test (DUT). Once the signal is digitized, the DSP will be used to run the phase correlation and obtain the necessary information. In our design, the counter is implemented on the Texas Instrument (TI) TMS329C6201 digital signal processor. The sample data from the ADC are input to the DSP. Additionally, the 5 MHz...
Topics: DTIC Archive, Chen, Shang-Shian, TELECOMMUNICATION LABS TAOYUAN (TAIWAN), *ANALOG TO DIGITAL...
Topics: NASA Technical Reports Server (NTRS), COMPUTER PROGRAMMING, ELECTRONIC EQUIPMENT, LIBRARIES,...
The development of a portable harmonic response for a-c servo systems is described up to the construction of the laboratory prototype model. The equipment is largely transistorized and provision is made for incorporating a d-c adaptor, the design of which is discussed.
Topics: DTIC Archive, Blane, A W, ADMIRALTY ENGINEERING LAB WEST DRAYTON (UNITED KINGDOM), *TRANSISTOR...
Apparatus for generating a substantially oscillation-free seismic signal for use in underwater petroleum exploration, including a bag with walls that are flexible but substantially inelastic, and a pressured gas supply for rapidly expanding the bag to its fully expanded condition is described. The inelasticity of the bag permits the application of high pressure gas to rapidly expand it to full size, without requiring a venting mechanism to decrease the pressure as the bag approaches a...
Topics: NASA Technical Reports Server (NTRS), OIL EXPLORATION, SEISMIC WAVES, SIGNAL GENERATORS, UNDERWATER...
ARINC Research Corporation is under contract to definitize previously developed Off-the-Shelf (OTS) Electronic Test Equipment (ETE) Specifications by converting them into full Military Specifications. The specifications are then to be used by the U.S. Army Communications and Electronics Materiel Readiness Command (CERCOM) in competitive evaluation and procurement of OTS ETE to replace appropriate U.S. Army items of general purpose Test, Measurement, and Diagnostic Equipment (TMDE). This...
Topics: DTIC Archive, Graham,Larry J, ARINC RESEARCH CORP ANNAPOLIS MD, *ELECTRONIC EQUIPMENT, *TEST...
Vibrations of a principal machine are reduced at the fundamental and harmonic frequencies by driving the drive motor of an active balancer with balancing signals at the fundamental and selected harmonics. Vibrations are sensed to provide a signal representing the mechanical vibrations. A balancing signal generator for the fundamental and for each selected harmonic processes the sensed vibration signal with adaptive filter algorithms of adaptive filters for each frequency to generate a balancing...
Topics: NASA Technical Reports Server (NTRS), VIBRATION, BALANCING, HARMONICS, FREQUENCIES, SIGNAL...
Propagation delay of a signal through a channel is measured by cyclically generating a first step-wave signal for transmission through the channel to a two-input logic element and a second step-wave signal with a controlled delay to the second input terminal of the logic element. The logic element determines which signal is present first at its input terminals and stores a binary signal indicative of that determination for control of the delay of the second signal which is advanced or retarded...
Topics: NASA Technical Reports Server (NTRS), INTEGRATED CIRCUITS, SIGNAL TRANSMISSION, DELAY, SIGNAL...
A programmable device generates a test signal indicative of a RF signal and receives a processed test signal indicative of the test signal after processing thereof by one of a RF transmission system and a RF receiving system. The programmable device performs a comparison between the processed test signal and calibration data, and generates a report based on the comparison. A hardwire signal router provides the test signal to one of the RF transmission system and the RF receiving system, and...
Topics: DTIC Archive, DEPARTMENT OF THE NAVY WASHINGTON DC, *RADIO SIGNALS, PATENT APPLICATIONS, RADIO...
Depending on the design, synthesized-sweep SFCW generators often have phase discontinuities at certain intervals (such as 1 MHz) when sweeping over a wider band. In addition, when sweeping repetitively over a small interval (such as 100 kHz), the starting phase may not be coherent from one sweep to the next. Undesired phase discontinuities give rise to spurious spectral components and prevent application of MTI techniques. This report discusses modifications and adjustments for minimizing or...
Topics: DTIC Archive, Phillips, A C, STANFORD UNIV CA STANFORD ELECTRONICS LABS, *SWEEP GENERATORS,...
The TRAK Systems' GOES Satellite Synchronized Time Code Generator is described. TRAK Systems has developed this timing instrument to supply improved accuracy over most existing GOES receiver clocks. A classical time code generator is integrated with a GOES receiver.
Topics: NASA Technical Reports Server (NTRS), ACCURACY, GOES SATELLITES, SYNCHRONISM, TIMING DEVICES,...
Diode-quad bridge circuit means is described for use as a transducer circuit or as a discriminator circuit. It includes: (1) a diode bridge having first, second, third, and fourth bridge terminals consecutively coupled together by four diodes polarized in circulating relationship; (2) a first impedance connected between the second bridge terminal and a circuit ground; (3) a second impedance connected between the fourth bridge terminal and the circuit ground; (4) a signal source having a first...
Topics: NASA Technical Reports Server (NTRS), DISCRIMINATORS, ELECTRIC BRIDGES, JUNCTION DIODES, ELECTRICAL...
This report describes a new method for the detection of deterministic signals in the presence of additive white Gaussian noise. The new method, based on recurrence plots, relies on a sliding-window technique combined with histogram analysis. Performance of the new approach is quantified in terms of receiver-operator characteristic (ROC) curves. The report also provides background information on recurrence plots and ROC curves necessary to understand the new approach.
Topics: DTIC Archive, Dissinger, Bryan M, NAVAL RESEARCH LAB WASHINGTON DC OPTICAL SCIENCES DIV, *RADAR...
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311
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Hewlett-Packard Journal Vol. 5 No. 12 (1954-08)(Hewlett-Packard)
Topics: output, frequency, modulation, generator, signal, model, generators, pulse, frequencies, tuning,...
1,039
1.0K
May 21, 2011
05/11
by
NON
texts
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The Earth's magnetic field, through its variability over a spectrum of spatial and temporal scales, contains fundamental information on the solid Earth and geospace environment (the latter comprising the atmosphere, ionosphere, and magnetosphere). Integrated studies of the geomagnetic field have the potential to address a wide range of important processes in the deep mantle and core, asthenosphere, lithosphere, oceans, and the solar-terrestrial environment. These studies have direct...
Topics: ARCHITECTURE (COMPUTERS), SIGNAL GENERATORS, CONFERENCES, RADIATION EFFECTS, SIGNAL PROCESSING,...
This technical report presents simulation and experimental hardware development of pulsed modulated microwave/radio frequency electronic control circuitry for control of electron/nuclear spin states of qubits/quantum memory applicable to semiconductor, superconductor, ionic and superconductor-ionic hybrid technologies. As the pulse quality and need for development of single pulses with very high quality will impact directly the coherence time of the qubit/memory, we present as an example the...
Topics: DTIC Archive, Nayfeh,Osama, SPACE AND NAVAL WARFARE SYSTEMS CENTER PACIFIC SAN DIEGO CA SAN DIEGO,...
This report contains information on how to design an interference cancellation system using Ettus software-defined radios and the GNU Radio software development kit.
Topics: DTIC Archive, Acosta,Jan P, US Army Research Laboratory Adelphi, softwaredefined radios, software...
An apparatus is presented for accurately calibrating ergometers so that the work rate produced by the particular ergometer being calibrated is accurate. The apparatus includes a dc motor which is coupled directly to the ergometer for rotating it at various speeds. Positioned on the shaft between the dc motor and the ergometer is a torque sensor and tachometer, which feed signals to a power computer for subsequent recording. A speed controller is utilized with the dc motor.
Topics: NASA Technical Reports Server (NTRS), CALIBRATING, ERGOMETERS, ROTATING SHAFTS, DIRECT CURRENT,...
A device for generating burst signals is reported that can be used to determine whether or not a laser Doppler velocimeter is operating properly. A high frequency signal which corresponds to the information frequency of the laser Doppler velocimeter is modulated by a low frequency signal to provide an envelope for the high frequency signal. The high frequency signal is modulated by any modulator means such as, for example, an analog multiplier. The low frequency signal is added to the modulated...
Topics: NASA Technical Reports Server (NTRS), LASER DOPPLER VELOCIMETERS, PULSE FREQUENCY MODULATION,...
An electrostatic conductive fiber detector is disclosed for use in detecting, counting and measuring the length of fibers down to 0.1 mm and below with increased accuracy and reliability over prior art devices. It can be used for detection of fibers suspending in a flowing gas, in a nonflowing gas, or in a vacuum and its accumulated counts over a period of time is essentially unaffected by velocity of the fibers being detected.
Topics: NASA Technical Reports Server (NTRS), ELECTROSTATIC PRECIPITATORS, MICROFIBERS, SIZE DETERMINATION,...
This Software Guide (SG) describes the software developed to test the Assessment Environment for Complex Systems (AECS) by the West Virginia High Technology Consortium (WVHTC) Foundation's Mission Systems Group (MSG) for the National Aeronautics and Space Administration (NASA) Aeronautics Research Mission Directorate (ARMD). This software is referred to as the AECS Test Project throughout the remainder of this document. AECS provides a framework for developing, simulating, testing, and...
Topics: NASA Technical Reports Server (NTRS), FLIGHT CONTROL, AVIONICS, COMPLEX SYSTEMS, COMPUTER PROGRAMS,...
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377
Jun 20, 2010
06/10
by
BRUSILOVSKII, K. A
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MATHEMATICAL MODEL OF STATISTICAL CHANNEL CHARACTERISTICS IN, AND TEST INSTRUMENTATION FOR, DIGITAL DATA TRANSMISSION SYSTEMS HANDLING UNIFORMLY CODED BINARY DATA
Topics: BINARY DATA, TRANSMISSION LINES, WHITE NOISE, DATA TRANSMISSION, DIGITAL DATA, INFORMATION THEORY,...
An active retrodirective antenna array which has central phasing from a reference antenna element through a "tree" structured network of transmission lines utilizes a number of phase conjugate circuits (PCCs) at each node and a phase reference regeneration circuit (PRR) at each node except the initial node. Each node virtually coincides with an element of the array. A PCC generates the exact conjugate phase of an incident signal using a phase locked loop which combines the phases in...
Topics: NASA Technical Reports Server (NTRS), ANTENNA ARRAYS, MICROWAVE TRANSMISSION, PHASE LOCKED SYSTEMS,...
The handbook presents both theoretical and practical data pertaining to design methods and procedures for timing systems and devices. The subjects covered are precision reference timers, electronic timers, mechanical timers, pyrotechnic timers, flueric timers, and a few others.
Topics: DTIC Archive, ARMY MATERIEL COMMAND ALEXANDRIA VA, *TIMING DEVICES, ANALOG SYSTEMS, DIGITAL...
A precision capacitive shaft encoder providing a dc signal corresponding to the angular position of a shaft is described. Two variable capacitances are coupled in tandem by a rotatable shaft. Each capacitor has a capacitance that varies linearly with a change in the angular position of the shaft. The sum of the two capacitances is always constant for any angular position of the shaft. Each capacitance is alternately coupled to a reference dc voltage and a discharge circuit. The capacitances are...
Topics: NASA Technical Reports Server (NTRS), CODERS, POSITION (LOCATION), SHAFTS (MACHINE ELEMENTS),...
A self regulating, nonfrictional, active magnetic bearing is disclosed which has an elongated cylindrical housing for containing a shaft type armature with quadrature positioned shaft position sensors and equidistantly positioned electromagnets located at one end of the housing. Each set of sensors is responsive to orthogonal displacement of the armature and is used to generate control signals to energize the electromagnets to center the armature. A bumper magnet assembly is located at one end...
Topics: NASA Technical Reports Server (NTRS), AUTOMATIC CONTROL, ELECTROMAGNETISM, LINEAR SYSTEMS, MAGNETIC...
Results of an effort to develop a lower-cost exciter with high stability, low phase noise, and controllable phase and frequency for use in Deep Space Network and Goldstone Solar System Radar applications are discussed. Included is a discussion of the basic concept, test results, plans, and concerns.
Topics: NASA Technical Reports Server (NTRS), DEEP SPACE NETWORK, FREQUENCY CONTROL, FREQUENCY...
A new Mixed-Signal Built-in Self-test approach that is based upon the step response of a reconfigurable (or multifunction) analog block is presented in this paper. The technique requires the overlapping step response of the Circuit Under Test (CUT) for two circuit configurations. Each configuration can be realized by changing the topology of the CUT or by sampling two CUT nodes with differing step responses. The technique can effectively detect both soft and hard faults and does not require an...
Topics: NASA Technical Reports Server (NTRS), ANALOG CIRCUITS, ELECTRONIC EQUIPMENT TESTS, SELF TESTS,...
An electronic device called SCIM (Speech Communication Index Meter) was designed primarily in terms of the Articulation Index theory; however, SCIM accommodates additional factors affecting speech that are not involved in the original procedures for calculating AI. The SCIM signal generator generates a 3- second signal burst, which is fed to the electrical input of the system under test; within 12 seconds the SCIM analyzer, located at the receiving station, calculates and displays an index,...
Topics: DTIC Archive, BOLT BERANEK AND NEWMAN INC CAMBRIDGE MA, *INTELLIGIBILITY, HUMAN FACTORS...
