E2B Television: fast scan television
(FSTV) standards; slow scan
television (SSTV) standards; facsimile (fax) communications
E2B01
(A)
How
many times per second is a new frame transmitted in a fast-scan television
system?
A. 30
B. 60
C. 90
D. 120
E2B02
(C)
How
many horizontal lines make up a fast-scan television frame?
A. 30
B. 60
C. 525
D. 1050
E2B03
(D)
How is
the interlace scanning pattern generated in a fast-scan television system?
A. By scanning the field from top to bottom
B. By scanning the field from bottom to top
C. By scanning from left to right in one field
and right to left in the next
D. By scanning odd numbered
lines in one field and even numbered ones in the next
E2B04
(B)
What is
blanking in a video signal?
A. Synchronization of the horizontal and
vertical sync pulses
B. Turning off the scanning
beam while it is traveling from right to left and from bottom to top
C. Turning off the scanning beam at the
conclusion of a transmission
D. Transmitting a black and white test pattern
E2B05
(D)
What is
the bandwidth of a vestigial sideband AM fast-scan television transmission?
A. 3 kHz
B. 10 kHz
C. 25 kHz
D. 6 MHz
E2B06
(C)
What is
the standard video level, in percent PEV, for black?
A. 0%
B. 12.5%
C. 70%
D. 100%
E2B07
(C)
What is
the standard video level, in percent PEV, for blanking?
A. 0%
B. 12.5%
C. 75%
D. 100%
E2B08
(A)
Which
of the following is NOT a common method of transmitting accompanying audio with
amateur fast-scan television?
A. Amplitude modulation of
the video carrier
B. Frequency-modulated sub-carrier
C. A separate VHF or UHF audio link
D. Frequency modulation of the video carrier
E2B09
(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
E2B10
(A)
What is
the modern standard scan rate for a facsimile picture transmitted by an amateur
station?
A. 240 lines per minute
B. 50 lines per minute
C. 150 lines per second
D. 60 lines per second
E2B11
(B)
What is
the approximate transmission time per frame for a facsimile picture transmitted
by an amateur station at 240 lpm?
A. 6 minutes
B. 3.3 minutes
C. 6 seconds
D. 1/60 second
E2B12
(C)
In
facsimile, what device converts variations in picture brightness and darkness
into voltage variations?
A. An LED
B. A Hall-effect transistor
C. A photodetector
D. An optoisolator