ANTENNA Radar Theory Exam #1 (Cal Maritime) Questions & Answers 2023/2024

ANTENNA Radar Theory Exam #1 (Cal Maritime) Questions & Answers 2023/2024 What is the standard range of pulse repetition rate? - ANSWER-500 to 2,000 pulses per second What does PRR mean? - ANSWER-Pulse Repetition Rate, amount of pulses per second of the magnetron How long does it take radar to travel one nautical mile? - ANSWER-6.173 Microseconds The range (in nautical miles) an object can be found by measuring the elapsed time during a RADAR pulse, and dividing by what what number? - ANSWER-12.346 Microseconds (Double 6.173 due to the return distance) What is the range of pulse length? - ANSWER-0.05 Microseconds to 1 Microsecond What does the ATR box do? - ANSWER-It prevents received signal from entering the transmitter What does a duplexer do? - ANSWER-It is an electronic switch that allows for one antenna to be used for transmission and reception. What is an echo box? - ANSWER-The echo box is a resonate cavity constructed in such a way as to slightly delay the return echo when it is reflected back to the receiver What does the synchro do? - ANSWER-It relays the position of the antenna to the indicator unit What is ARPA an acronym for? - ANSWER-Automatic RADAR Plotting Aid What is the purpose of the permanent magnetic field that surrounds the (TWT) in a magnatron - ANSWER-It is used to help focus the beam