ATT WEEK 13 BEST VERSION |
QUESTIONS AND ANSWERS | TESTED
OFTEN | VERIFIED BY EXPERT | RATED
100% CORRECT | NEWLY UPDATED
2025
Q: does the local oscillator operate the same in fm as in am?
Answer ✔✔ yes
Q: what factors allow hf systems to provide long range communications?
Answer ✔✔ high power transmitter, sensitive receivers and ionospheric conditions
Q: how are transistors tested?
Answer ✔✔ resistance checks and dc analysis
Q: what factors influence ionospheric refraction?
Answer ✔✔ the ionosphere density, transmitter operating frequency, and the angle at which
radio waves strike the ionosphere
Q: what allows a balanced modulator to suppress a carrier effectively?
Answer ✔✔ highly matched components to compensate for low tolerance
Q: what size of frequency should be injected in circuit?
Answer ✔✔ as small as possible
, Q: why is the bandwidth of nbfm communication systems reduced?
Answer ✔✔ to accommodate voice and signal transmissions
Q: what are the 4 primary advantages of an fm radio?
Answer ✔✔
Greater noise suppression
High fidelity reception
Less interference between broadcast stations
Reduced transmitter power to cover the assigned area
Q: what modules are always used in a pll system?
Answer ✔✔
Phase detector
Frequency counter/divider
Vco
Loop filter
Q: what components make up the waveform of an am signal?
Answer ✔✔ usb, lsb, carrier
Q: the fm sidebands that contain the majority of the power are called
__________________________.
Answer ✔✔ significant sidebands
Q: what does the balanced modulator circuit do to the carrier signal?
Answer ✔✔ it suppresses the carrier
Q: what term describes determining a bad component in a stage or section?
Answer ✔✔ isolation
QUESTIONS AND ANSWERS | TESTED
OFTEN | VERIFIED BY EXPERT | RATED
100% CORRECT | NEWLY UPDATED
2025
Q: does the local oscillator operate the same in fm as in am?
Answer ✔✔ yes
Q: what factors allow hf systems to provide long range communications?
Answer ✔✔ high power transmitter, sensitive receivers and ionospheric conditions
Q: how are transistors tested?
Answer ✔✔ resistance checks and dc analysis
Q: what factors influence ionospheric refraction?
Answer ✔✔ the ionosphere density, transmitter operating frequency, and the angle at which
radio waves strike the ionosphere
Q: what allows a balanced modulator to suppress a carrier effectively?
Answer ✔✔ highly matched components to compensate for low tolerance
Q: what size of frequency should be injected in circuit?
Answer ✔✔ as small as possible
, Q: why is the bandwidth of nbfm communication systems reduced?
Answer ✔✔ to accommodate voice and signal transmissions
Q: what are the 4 primary advantages of an fm radio?
Answer ✔✔
Greater noise suppression
High fidelity reception
Less interference between broadcast stations
Reduced transmitter power to cover the assigned area
Q: what modules are always used in a pll system?
Answer ✔✔
Phase detector
Frequency counter/divider
Vco
Loop filter
Q: what components make up the waveform of an am signal?
Answer ✔✔ usb, lsb, carrier
Q: the fm sidebands that contain the majority of the power are called
__________________________.
Answer ✔✔ significant sidebands
Q: what does the balanced modulator circuit do to the carrier signal?
Answer ✔✔ it suppresses the carrier
Q: what term describes determining a bad component in a stage or section?
Answer ✔✔ isolation
