EVALUATION OF TECHNIQUES USED IN THE BUTLER TERMINAL AREA MODEL 1020 DISTANCE MEASURING EQUIPMENT
This report covers the evaluation of some techniques used in the low-power (terminal area) Butler 1020 distance measuring equipment (DME). The equipment was delivered to the National Aviation Facilities Experimental Center where laboratory tests were conducted. Laboratory tests dealt with the evaluation of the traffic-handling capability, echo-suppression circuitry, and the effects of first-pulse and second-pulse timing techniques. It was concluded that (1) with interrogation-pulse spacings of other than exactly 12 microsec, first-pulse timing is effect in maintaining the reply delay between the first pulse of the interrogation to the first or second pulse of the reply constant, and (2) the echo-suppression circuits were effective in reducing the number of replies to false interrogations.
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTERATLANTIC CITY, NJ USA
- ERIKSON, R H
- Publication Date: 1975-2
- Pagination: 37 p.
- TRT Terms: Distance measuring equipment; Instrument landing systems; Performance tests; Reduction (Chemistry)
- Old TRIS Terms: Echoes; Instrument landing; Pulse spacing modulation; Reduction
- Accession Number: 00090312
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FAA-NA-74-17 Final Rpt.
- Files: NTIS, USDOT
- Created Date: Apr 22 1975 12:00AM