6-65.
Which, if any, of the following
types of picture synchronizing
pulses provides a means of
frequency discrimination?
1.
Vertical sync pulse
2.
Horizontal sync pulse
3.
Serrated horizontal sync pulse
4.
None of the above
6-66.
A television system that uses
random interlace, no special sync
pulses, exhibits which, if any, of
the following undesirable
characteristics?
1.
Circuit complexity
2.
Long-range transmission use
only
3.
Insufficient resolution
4.
None of the above
6-67.
What is the video bandwidth of a
slow-speed scan television system?
1.
500 HZ to 250 kHZ
2.
750 kHz to 10 MHz
3.
10 MHz to 100 MHz
4.
100 MHz to 10 GHz
6-68.
If four dynodes having a gain of 5
were used in the image orthicon
tube, what would the be the gain of
the multiplier section?
1.
5
2.
25
3.
125
4.
625
6-69.
The polarity of the signal
developed by the isocon is the same
as the polarity of the orthicon.
1.
True
2.
False
6-70.
What is the transparent conductive
coating on the inner surface of the
vidicon camera tube known as?
6-71.
A plumbicon tube with a designation
of 67423B has a color response for
what color?
1.
Red
2. Green
3.
Blue
4.
White
IN ANSWERING QUESTIONS 6-72 AND 6-73,
REFER TO FIGURE 5-31 IN THE TEXTBOOK.
6-72.
The tin dioxide contained on the
faceplate inner surface is what
type of semiconductor?
1.
N-type
2.
P-type
3.
PNP-type
4.
NPN-type
6-73.
What type of junction is formed in
view B?
1. PNP
2. NPN
3. PN
4. PIN
6-74.
Which of the following is NOT an
application of the SEC tube?
1.
Commercial television
2.
Extremely low-light
3.
High internal amplification
4.
Fast response to moving objects
6-75.
What is the basic difference
between color and monochrome
picture tubes?
1.
The type of phosphors coating
the screen
2.
The type of biasing used
3.
The cathode circuit
4.
The grid circuit
1.
Signal electrode
2.
Signal grid
3.
Signal cathode
4.
Signal anode
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