G4B – Tests and test equipment

- [[G4B01]] (D)
What item of test equipment contains horizontal and vertical channel amplifiers? #card
	- A. An ohmmeter
	- B. A signal generator
	- C. An ammeter
	- D. An oscilloscope
- [[G4B02]] (D)
Which of the following is an advantage of an oscilloscope versus a digital voltmeter? #card
	- A. An oscilloscope uses less power
	- B. Complex impedances can be easily measured
	- C. Greater precision
	- D. Complex waveforms can be measured
- [[G4B03]] (A)
Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter? #card
	- A. An oscilloscope
	- B. A field strength meter
	- C. A sidetone monitor
	- D. A wavemeter
- [[G4B04]] (D)
What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal? #card
	- A. The local oscillator of the transmitter
	- B. An external RF oscillator
	- C. The transmitter balanced mixer output
	- D. The attenuated RF output of the transmitter
- [[G4B05]] (D)
Why do voltmeters have high input impedance? #card
	- A. It improves the frequency response
	- B. It allows for higher voltages to be safely measured
	- C. It improves the resolution of the readings
	- D. It decreases the loading on circuits being measured
- [[G4B06]] (C)
What is an advantage of a digital multimeter as compared to an analog multimeter? #card
	- A. Better for measuring computer circuits
	- B. Less prone to overload
	- C. Higher precision
	- D. Faster response
- [[G4B07]] (B)
What signals are used to conduct a two-tone test? #card
	- A. Two audio signals of the same frequency shifted 90 degrees
	- B. Two non-harmonically related audio signals
	- C. Two swept frequency tones
	- D. Two audio frequency range square wave signals of equal amplitude
- [[G4B08]] (A)
What transmitter performance parameter does a two-tone test analyze? #card
	- A. Linearity
	- B. Percentage of suppression of the carrier and undesired sideband for SSB
	- C. Percentage of frequency modulation
	- D. Percentage of carrier phase shift
- [[G4B09]] (D)
When is an analog multimeter preferred to a digital multimeter? #card
	- A. When testing logic circuits
	- B. When high precision is desired
	- C. When measuring the frequency of an oscillator
	- D. When adjusting circuits for maximum or minimum values
- [[G4B10]] (A)
Which of the following can be determined with a directional wattmeter? #card
	- A. Standing wave ratio
	- B. Antenna front-to-back ratio
	- C. RF interference
	- D. Radio wave propagation
- [[G4B11]] (C)
Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements? #card
	- A. Receiver
	- B. Transmitter
	- C. Antenna and feed line
	- D. All these choices are correct
- [[G4B12]] (B)
What effect can strong signals from nearby transmitters have on an antenna analyzer? #card
	- A. Desensitization which can cause intermodulation products which interfere with impedance readings
	- B. Received power that interferes with SWR readings
	- C. Generation of harmonics which interfere with frequency readings
	- D. All these choices are correct
- [[G4B13]] (C)
Which of the following can be measured with an antenna analyzer? #card
	- A. Front-to-back ratio of an antenna
	- B. Power output from a transmitter
	- C. Impedance of coaxial cable
	- D. Gain of a directional antenna