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1992-01-26
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FCC ADVANCED Exam Question Pool. Subelement 4AB.
Operating Procedures. 1 Question.
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4AB 1.1 D
What is facsimile?
A. The transmission of characters by radioteletype that form a picture when
printed
B. The transmission of still pictures by slow-scan television
C. The transmission of video by amateur television
D. The transmission of printed pictures for permanent display on paper
4AB 1.2 A
What is the modern standard scan rate for a facsimile picture transmitted by
an amateur station?
A. The modern standard is 240 lines per minute
B. The modern standard is 50 lines per minute
C. The modern standard is 150 lines per second
D. The modern standard is 60 lines per second
4AB 1.3 B
What is the approximate transmission time for a facsimile picture
transmitted by an amateur station?
A. Approximately 6 minutes per frame at 240 lpm
B. Approximately 3.3 minutes per frame at 240 lpm
C. Approximately 6 seconds per frame at 240 lpm
D. 1/60 second per frame at 240 lpm
4AB 1.4 B
What is the term for the transmission of printed pictures by radio?
A. Television
B. Facsimile
C. Xerography
D. ACSSB
4AB 1.5 C
In facsimile, how are variations in picture brightness and darkness
converted into voltage variations?
A. With an LED
B. With a Hall-effect transistor
C. With a photodetector
D. With an optoisolator
4AB 2.1 D
What is slow-scan television?
A. The transmission of Baudot or ASCII signals by radio
B. The transmission of pictures for permanent display on paper
C. The transmission of moving pictures by radio
D. The transmission of still pictures by radio
4AB 2.2 B
What is the scan rate commonly used for amateur slow-scan television?
A. 20 lines per minute
B. 15 lines per second
C. 4 lines per minute
D. 240 lines per minute
4AB 2.3 C
How many lines are there in each frame of an amateur slow-scan television
picture?
A. 30
B. 60
C. 120
D. 180
4AB 2.4 C
What is the audio frequency for black in an amateur slow-scan television
picture?
A. 2300 Hz
B. 2000 Hz
C. 1500 Hz
D. 120 Hz
4AB 2.5 D
What is the audio frequency for white in an amateur slow-scan television
picture?
A. 120 Hz
B. 1500 Hz
C. 2000 Hz
D. 2300 Hz
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End of Subelement 4AB.