Study General G4B

G4B

AMATEUR RADIO PRACTICES

- Tests and test equipment

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G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

  1. A An ohmmeter
  2. B A signal generator
  3. C An ammeter
  4. D An oscilloscope
G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

  1. A An oscilloscope uses less power
  2. B Complex impedances can be easily measured
  3. C Greater precision
  4. D Complex waveforms can be measured
G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

  1. A An oscilloscope
  2. B A field strength meter
  3. C A sidetone monitor
  4. D A wavemeter
G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

  1. A The local oscillator of the transmitter
  2. B An external RF oscillator
  3. C The transmitter balanced mixer output
  4. D The attenuated RF output of the transmitter
G4B05

Why do voltmeters have high input impedance?

  1. A It improves the frequency response
  2. B It allows for higher voltages to be safely measured
  3. C It improves the resolution of the readings
  4. D It decreases the loading on circuits being measured
G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

  1. A Better for measuring computer circuits
  2. B Less prone to overload
  3. C Higher precision
  4. D Faster response
G4B07

What signals are used to conduct a two-tone test?

  1. A Two audio signals of the same frequency shifted 90 degrees
  2. B Two non-harmonically related audio signals
  3. C Two swept frequency tones
  4. D Two audio frequency range square wave signals of equal amplitude
G4B08

What transmitter performance parameter does a two-tone test analyze?

  1. A Linearity
  2. B Percentage of suppression of the carrier and undesired sideband for SSB
  3. C Percentage of frequency modulation
  4. D Percentage of carrier phase shift
G4B09

When is an analog multimeter preferred to a digital multimeter?

  1. A When testing logic circuits
  2. B When high precision is desired
  3. C When measuring the frequency of an oscillator
  4. D When adjusting circuits for maximum or minimum values
G4B10

Which of the following can be determined with a directional wattmeter?

  1. A Standing wave ratio
  2. B Antenna front-to-back ratio
  3. C RF interference
  4. D Radio wave propagation
G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

  1. A Receiver
  2. B Transmitter
  3. C Antenna and feed line
  4. D All these choices are correct
G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

  1. A Desensitization which can cause intermodulation products which interfere with impedance readings
  2. B Received power that interferes with SWR readings
  3. C Generation of harmonics which interfere with frequency readings
  4. D All these choices are correct
G4B13

Which of the following can be measured with an antenna analyzer?

  1. A Front-to-back ratio of an antenna
  2. B Power output from a transmitter
  3. C Impedance of coaxial cable
  4. D Gain of a directional antenna
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