7-A-010: Carrier & Sidebands
7-010A:
Which of the following statements describes the carrier?
The carrier is a Radio Frequency (RF) signal that is modified to carry intelligence.
The carrier consists of at least 3 separate but closely spaced frequencies.
The carrier is used to modulate the information signal.
There are always sidebands on either side of the carrier.
7-010B:
How many sidebands are present in a standard A.M. signal?
Two
One
Three
Four
7-010C:
How many sidebands are present in the J3E mode?
One upper sideband.
Two sidebands and a carrier.
One lower sideband.
Two carriers and one sideband.
7-010D:
What is the signal transmitted in H3E mode?
A full carrier and the upper sideband.
Two sidebands, upper and lower.
A reduced carrier and the lower sideband.
A full carrier and both upper and lower sidebands.
7-010E:
What is the signal transmitted in J2B mode?
An upper sideband of 2 alternating tones.
A full carrier and one sideband.
A full carrier and two sidebands.
An upper sideband of a single tone switched on and off.
7-010F:
Which of the following statements is true?
None of the above
An RF carrier is always required to carry the information.
There is only a single tone used in J2B mode.
Both of the above
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● = Learned
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● = Incorrect answer
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