Electronic Instrumentation for the Study of Air-to-Air Electromagnetic Wave Propagation at 250, 1000 and 3000 MC
Report Number: WADC TR 52-268 Author: White, Stanley B. Corporate Author: Aircraft Radiation Laboratory Laboratory: Aircraft Radiation Laboratory Date of Publication: 1952-08 Pages: 53 AD Number: AD0004089 Original AD Number: 4089Contrails does not possess a copy of this report. Click here to offer Contrails a donation of this report
Abstract: Electric instrumentation was developed for air-to-air propagation on measurements at 250-, 1000-, and 3000-mc ranges. A square-wave-modulated crystal-controlled transmitter for 245 and 1000 mc was used with an 18-c- bandwidth filter-amplifier and an APR-4 receiver, while a peak reader with an internally generated carrier was used with the receiver for short-pulse modulation measurements at 256, 2880, and 3295 mc. The rectified output from either the filter-amplifier or peak reader operated a recorder which continuously recorded the received signal on an approximately logarithmic scale. The receiving system using square-wave modulation detected and recorded 107-dbm signals and had a dynamic range of well over 100 db. The short-pulse receiving system detected and recorded signals down to the noise level of the receiver, and had a dynamic range of over 85 db. The 2 systems operated satisfactory with existing radio and radar equipment.