ATT TEST 3 EXAMINATION TEST 2026
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
⩥ What is the most commonly used type of antenna for microwave
communication systems? Answer: Horn.
⩥ What type of circuit is a cavity resonator? Answer: Parallel LC.
⩥ What are the advantages of a cavity resonator? Answer: High Q, high
power, small size and ruggedness.
⩥ At high frequencies, which value of lead inductance can cause
attenuation of the input signal? Answer: LG
⩥ What part of the Klystron causes electrons to accelerate and
decelerate? Answer: Buncher grids and cavity.
⩥ What are bipolar and field effect transistors used for in microwave
circuits? Answer: Amplifiers/Oscillators
⩥ What is the transit time in a transistor? Answer: The time it takes for
current carriers to travel through the element.
,⩥ What is the principle of Varactor operation? Answer: PN Junction
capacitance
⩥ What is the principle of Gunn diode operation? Answer: Transfer of
Electrons.
⩥ When does a tunnel diode operate like a conventional diode? Answer:
From point C on.
⩥ What is defined as the ability of RF spectrum systems to reject
unwanted radiations and minimize the likelihood of its own
transmissions causing interference to other users of the spectrum?
Answer: EMC (Electromagnetic Compatibility)
⩥ What type of jammer generates RF noise in a particular band or
frequency channel to change the signal noise ratio of a RADAR
receiver? Answer: Spot Noise.
⩥ Decoys and forward dispensed chaff are examples of what type of
ECM? Answer: Passive Deception.
⩥ The Citizen Band frequency range is ______. Answer: 26.965 MHz to
27.405 MHz
, ⩥ The formula: PAF = m^2PC/2 is used to calculate ______. Answer:
The audio power needed to modulate a carrier.
⩥ The IF band width in a communication receiver is ______. Answer: 5-
6 kHz
⩥ In addition to the incoming signal, the channel detector is controlled
by _______. (which component(s)) Answer: R4
⩥ When the squelch circuit is enabled, which circuit(s) are disabled?
Answer: Audio Amplifier.
⩥ The VCO consists of _________. (which component(s)) Answer: D3,
L6, U3
⩥ Which is an advantage of SSB transmissions? Answer: Makes
efficient use of the RF spectrum.
⩥ What form of SSB is commonly used by amateur radio operators?
Answer: Standard SSB
⩥ SSB transmissions are _______. Answer: AM Modulated.
COMPLETE QUESTIONS AND SOLUTIONS
GRADED A+
⩥ What is the most commonly used type of antenna for microwave
communication systems? Answer: Horn.
⩥ What type of circuit is a cavity resonator? Answer: Parallel LC.
⩥ What are the advantages of a cavity resonator? Answer: High Q, high
power, small size and ruggedness.
⩥ At high frequencies, which value of lead inductance can cause
attenuation of the input signal? Answer: LG
⩥ What part of the Klystron causes electrons to accelerate and
decelerate? Answer: Buncher grids and cavity.
⩥ What are bipolar and field effect transistors used for in microwave
circuits? Answer: Amplifiers/Oscillators
⩥ What is the transit time in a transistor? Answer: The time it takes for
current carriers to travel through the element.
,⩥ What is the principle of Varactor operation? Answer: PN Junction
capacitance
⩥ What is the principle of Gunn diode operation? Answer: Transfer of
Electrons.
⩥ When does a tunnel diode operate like a conventional diode? Answer:
From point C on.
⩥ What is defined as the ability of RF spectrum systems to reject
unwanted radiations and minimize the likelihood of its own
transmissions causing interference to other users of the spectrum?
Answer: EMC (Electromagnetic Compatibility)
⩥ What type of jammer generates RF noise in a particular band or
frequency channel to change the signal noise ratio of a RADAR
receiver? Answer: Spot Noise.
⩥ Decoys and forward dispensed chaff are examples of what type of
ECM? Answer: Passive Deception.
⩥ The Citizen Band frequency range is ______. Answer: 26.965 MHz to
27.405 MHz
, ⩥ The formula: PAF = m^2PC/2 is used to calculate ______. Answer:
The audio power needed to modulate a carrier.
⩥ The IF band width in a communication receiver is ______. Answer: 5-
6 kHz
⩥ In addition to the incoming signal, the channel detector is controlled
by _______. (which component(s)) Answer: R4
⩥ When the squelch circuit is enabled, which circuit(s) are disabled?
Answer: Audio Amplifier.
⩥ The VCO consists of _________. (which component(s)) Answer: D3,
L6, U3
⩥ Which is an advantage of SSB transmissions? Answer: Makes
efficient use of the RF spectrum.
⩥ What form of SSB is commonly used by amateur radio operators?
Answer: Standard SSB
⩥ SSB transmissions are _______. Answer: AM Modulated.
