Described are the procedures, tests, and results of a program to measure the actual radiated emissions of two Industrial Heating Devices that have fundamental operating frequencies in the Non-directional Beacon bands (NDB). The radiated emissions testing was conducted at an FCC approved open field test site. Three different measurement methods were used to determine the radiated emissions lin all directions around and above the IHD equipment. The results of the radiated emission measurements...
Topics: DTIC Archive, Nickum,J D, OHIO UNIV ATHENS AVIONICS ENGINEERING CENTER, *RADIOFREQUENCY...
The communication of weather data to aircraft is discussed. Problems encountered because of the great quantities of data available and the limited capacity to transfer this via radio link to an aircraft are discussed. Display devices are discussed.
Topics: NASA Technical Reports Server (NTRS), AIRCRAFT COMMUNICATION, GROUND-AIR-GROUND COMMUNICATION,...
The problem of translating the time of occurrence of received Loran-C pulses into a time, referenced to a particular period of occurrence is addressed and applied to the design of a digital word generator for a Loran-C sensor processor package. The digital information from this word generator is processed in a KIM-1 microprocessor system which is based on the MOS 6502 CPU. This final system will consist of a complete time difference sensor processor for determining position information using...
Topics: NASA Technical Reports Server (NTRS), ANALOG TO DIGITAL CONVERTERS, CIRCUIT DIAGRAMS, LOGIC...
Development of a low cost Loran C receiver for general aviation use is discussed. The preparation and procedure of a flight test conducted with a receiver design which utilizes a phase locked loop oscillator to track the Loran C signals is described. It is indicated that such a receiver is a viable alternative for future work in developing a low cost Loran-C navigator.
Topics: NASA Technical Reports Server (NTRS), DATA ACQUISITION, FLIGHT TESTS, LORAN C, RADAR RECEIVERS,...
A small microprocessor-based system designed to: contain all or most of the interface hardware, designed to be easy to access and modify the hardware, to be capable of being strapped to the seat of a small general aviation aircraft, and to be independent of the aircraft power system is described. The system is used to develop a low cost Loran C sensor processor, but is designed such that the Loran interface boards may be removed and other hardware interfaces inserted into the same connectors....
Topics: NASA Technical Reports Server (NTRS), AIRBORNE/SPACEBORNE COMPUTERS, ELECTRONIC MODULES,...
Described are the RF field measurements of four Industrial, Scientific and Medical devices to characterize the fundamental and 4th harmonic radiation from these devices according to FCC Part 18 and CISPR Publication 11 and 11A. The effects of the 4th harmonic radiation is considered with respect to ILS localizer receiver suceptability. The testing was performed at an open field test site with measurements made on the ground and at elevation angles from 45 to 75 degrees. Additionally, an...
Topics: DTIC Archive, Nickum,J D, OHIO UNIV ATHENS AVIONICS ENGINEERING CENTER, *FIELD TESTS, *CALIBRATION,...
The software package developed for the KIM-1 Micro-System and the Mini-L PLL receiver to simplify taking flight test data is described along with the address and data bus buffers used in the KIM-1 Micro-system. The interface hardware and timing are also presented to describe completely the software programs.
Topics: NASA Technical Reports Server (NTRS), BUFFER STORAGE, COMPUTER SYSTEMS PROGRAMS, FLIGHT TESTS,...
A display enhancement implemented on the new VDM-1 video display board installed in a LORAN-C navigation receiver is addressed. Increased character size for easier viewing of the 3.75 inch diagonal CRT display is provided.
Topics: NASA Technical Reports Server (NTRS), ALPHANUMERIC CHARACTERS, CIRCUIT BOARDS, COMPUTER GRAPHICS,...
The results of two methods of obtaining timely and accurate severe weather presentations in the cockpit are detailed. The first method described is a course up display of uplinked weather radar data. This involves the construction of a demonstrator that will show the feasibility of producing a course up display in the cockpit of the NASA simulator at Langley. A set of software algorithms was designed that could easily be implemented, along with data tapes generated to provide the cockpit...
Topics: NASA Technical Reports Server (NTRS), COCKPITS, DISPLAY DEVICES, METEOROLOGICAL RADAR,...
