A 95 ghz s band b 3 ghz x band c 95 ghz ku band d 3

Info icon This preview shows pages 34–36. Sign up to view the full content.

a) 9.5 GHz S band b) 3 GHz X band c) 9.5 GHz Ku band d) 3 GHz S band 389. To what two circuits would a radar timer circuit feed signals? a) modulator and mixer b) amplifier and circulator c) modulator and circulator d) amplifier and modulator 390. What is the target display on a CRT called? a) crosshair b) blip c) center spot d) round 391. What is the main bang on a PPI radar set? a) blip b) center spot c) bearing d) round 392. What is the ability to separate adjacent equidistant targets called? a) bearing resolution b) narrow bandwidth c) high frequency d) shorter wavelength 393. What is the approximate rotational rate of a radar antenna? a) 20 rpm b) 5 rpm c) 25 rpm d) 10 rpm 394. How is radar CRTs differ from TV? a) square b) round c) rectangular d) trapezoidal 395. What circuits make up the radar transmitter? a) multivibrator b) trapezoidal oscillator c) sine wave generator d) blocking oscillator 396. What type of oscillator determines the PRR? a) blocking b) pulse c) square d) blocking or pulse 397. What other circuit might be used as an oscillator that determines the PRR? a) trapezoidal generator b) unbalanced multivibrator c) bistable multivibrator d) sinewave generator 398. Why are hydrogen-gas thyratrons used in radar? a) fast-ionize b) cheaper c) accurate d) efficient 399. What is the other name for a pulse-forming network in radars? a) tuned circuit b) oscillators c) delay line d) capacitive circuits 400. What determines the PRR in odd-time radar sets? a) tuned circuit frequency b) oscillator frequency c) spark gap speed d) MOPA transmitter time
Image of page 34

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

401. What is used to carry RF energy from magnetron to antenna in a radar set? a) helix b) parallel wireline c) coax d) waveguide 402. What is the method of illuminating a parabolic reflector with RF? a) horn b) cassegrain c) helix d) coax 403. How would a radar reflector be parabolic- shaped a) circularly b) vertically c) horizontally d) none of these 404. In what way are radar emissions similar to microwave ovens? a) can transmit b) can receive c) can cook d) can transceiver 405. To what tube is a dc keep-alive voltage applied? a) Oscillator b) Transmit-Receive Mixer c) Circulator d) Isolator 406. In radar, if the mixer diode burns out, what are replaced? a) tube b) mixer c) antenna d) diode 407. What is the cavity between magnetron and mixer cavity called? a) ATR b) TR c) Transmit d) Receive 408. Radar receivers use what Ifs a) 20 MHz and lower b) 10 MHz and higher c) 30 MHz or higher d) 10 MHz and lower 409. What kind of local oscillators does a radar receiver use?
Image of page 35
Image of page 36
This is the end of the preview. Sign up to access the rest of the document.
  • Spring '17
  • Jane Smooth
  • d., microwave

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern