METHOD AND ARRANGEMENT FOR LATERAL DETERMINATION WITH TWO-CHANNEL DIRECTION FINDERS

摘要

Abstract of the DisclosureDisclosed is a method for lateral (azimuth) determination withradio direction finders according to a two-channel principle, with a crosseddirectional-antenna system, an auxiliary antenna, and cathode-ray-tubeindicator. In a cyclically repeated three-step switching sequence, bothchannels of a two-channel receiver are acted upon. In a first switchingstep for the purpose of balancing the brightness control and phase response,the channels are acted upon by the sum of the two direction-finder voltagesof the crossed directional-antenna system. In the second switching step, theauxiliary antenna voltage is fed to the one channel of the two-channelreceiver, while the sum of the direction-finder voltages of the crosseddirectional-antenna system is fed to the other channel thereof, the phasedifference between the output voltages from the two channels being determinedand being stored as a reference for the brightness control of the cathode-raytube. In the third switching step, one direction-finder voltage is fed,through one channel of the two-channel receiver, to vertical deflecting platesof the cathode-ray tube, while the other direction-finder voltage is fed,through the other channel, to horizontal deflection plates of the saidcathode-ray tube. The sum of the two direction-finder voltages is used,after a phase shift in accordance with the stored reference, for azimuth-truebrightening of the cathode-ray tube. Apparatus for carrying out the methodis also disclosed.