Simulation of radar interference

Claim 1

A SIMULATING DEVICE IN A PASSIVE INTERFERENCE GENERATOR COMPRISING, MEANS FOR SIMULATING WINDOW DROP AND PASSIVE INTERTERFERENCE, A CATHODE RAY TUBE SCANNING MEANS PROVIDING A PLAN POSITION INDICATOR SCAN, POLARIZED FIRST SCREEN MEANS OPTICALLY LINED WITH SAID CATHODE RAY TUBE SCANNING MEANS, SAID SCREEN MEANS HAVING PASSIVE INTERFERENCE OPAQUE AREAS DRAWN THEREON, CONTROL POLARIZED MEANS, OPTICALLY ALIGNED WITH SAID FIRST POLARIZED SCREEN MEANS AND SAID SCANNING MEANS FOR VARYING THE POLARIZATION ANGLE BETWEEN SAID TWO POLARIZED MEANS, SECOND ROTATABLE SCREEN MEANS, OPTICALLY ALIGNED WITH SAID POLARIZED FIRST SCREEN MEANS, SAID SCANNING MEANS, AND SAID CONTROL POLARIZED MEANS, WINDOW DROP GENERATING MEANS OPTICALLY ALIGNED TOO SAID SECOND SCREEN MEANS FOR GENERATION OF WINDOW DROP INTERFERENCE, PHOTO TUBE PICK-UP MEANS OPTICALLY OPERATIVE WITH SAID FIRST AND SAID SECOND SCREEN MEANS AND SAID SCANNING MEANS, AND SAID FIRST SCREEN MEANS, SAID SECOND SCREEN MEANS AND SAID CONTROL POLARIZED MEANS LOCATD BETWEEN SAID PHOTO TUBE PICK-UP MEANS AND SAID SCANNING MEANS, WHEREBY SAID SCANNING MEANS IN CONJUNCTION WITH SAID FIRST AND SAID SECOND SCREEN MEANS AND SAID WINDOW DROP GENERATING MEANS PROVIDES SAID PHOTOTUBE MEANS WITH VISUAL SIMULATION OF PASSIVE AND WINDOW DROP INTERFERENCE, VIDEO AMPLIFIER MEANS OPERATIVELY CONNECTED TO THE OUTPUT OF SAID PHOTOTUBE MEANS FOR GENERATION OF VIDEO SIGNALS IN ACCORDANCE WITH THE APPEARANCE OF SAID PASSIVE AND WINDOW DROP INTERFERENCE, AND AZIMUTH DRIVE SERVO LOOP OPERATIVELY CONNECTED TO SAID SECOND SCREEN ASSEMBLY FOR ROTATING SAID SCREEN ASSEMBLY IN ACCORDANCE WITH TARGET AZIMUTH AND INFORMATION SIGNALS WHICH ARE SUPPLIED FROM AN EXTERNAL TARGET COORDINATE GENERATOR.