Output
Do You Remember?:
Matching (Printers):
_____1.
_____2.
Measures speed of printer
Needs paper that has holes down the sides to pull it
through the printer
_____3. Output that is in a permanent form, like on paper
_____4. Printer that actually hits the paper with something
_____5. Printer using pins to form characters
_____6. Prints from left to right and right to left
_____7. Screen display is the same a printed output
_____8. Sends data one bit at a time
_____9. Space an object takes up
_____10. Sprays ink onto paper to form characters
_____11. Very high quality print
_____12. Works like a copier using toner
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
l)
m)
n)
o)
p)
q)
r)
s)
t)
u)
v)
bi-directional
chain
cps
daisy wheel
dot-matrix
draft
footprint
hard copy
impact
ink jet
LQ
NLQ
non-impact
page printer
parallel cable
pins
resolution
serial cable
soft copy
thermal
tractor feed
WYSIWYG
a)
b)
c)
d)
e)
f)
g)
h)
i)
j)
k)
l)
m)
n)
CRT
CYMK
dot pitch
interlaced
LCD
monitor
monochrome
non-interlaced
pixel
refresh rate
resolution
RGB
VDT
VGA
Matching (Monitors):
_____1.
_____2.
_____3.
_____4.
_____5.
_____6.
Color system for phosphor dots
Color system for printing
Distance between phosphor dots
How often the picture is redrawn
Lights alternate rows of phosphor dots
Name for display device from the physical mechanism
used to make the picture
_____7. Single color text on single color background
_____8. The number of phosphor dots per inch
_____9. Type of display usually found on laptop computers
_____10. Video display terminal
Questions:
1.
2.
3.
How is printer speed measured?
What are the advantages and disadvantages of your choices for paper?
How is print quality measured? Which is the best quality?
4.
5.
What is the difference between impact and non-impact printers?
What are the main kinds of impact printers? How do they form their characters? What are their advantages and
disadvantages?
6. What are the main kinds of non-impact printers? How do they form their characters? What are their advantages
and disadvantages?
7. What are the various names used for display device that looks like a television?
8. What are the RGB and the CMYK color systems? Which is used for what?
9. Why would you want an interlaced screen? How does that work?
10. What is the refresh rate? What would a desirable refresh rate be?
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Answers
Matching (Printers):
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
c
u
h
i
e
a
v
r
g
j
k
n
Matching (Monitors):
1.
2.
3.
4.
5.
6.
l
b
c
j
d
a
7.
8.
9.
10.
g
k
e
m
Answers
1.
2.
3.
4.
5.
How is printer speed measured?
cps = characters per second
lpm = lines per minute
ppm = pages per minute
What are the advantages and disadvantages of your choices for paper?
Continuous-form paper: advantage - less expensive, do not need to replace paper often.
Disadvantage - may need to separate pages and remove strips with perforations
Single sheet paper: advantage - can change to specialty papers like letterhead or slick for
photos or envelopes. Disadvantage - must add paper more often
How is print quality measured? Which is the best quality?
A numerical measure is printer resolution in dots per inch (dpi).
LQ = letter quality - as good as best typewriter can produce
NLQ = near letter quality - nearly as good as letter quality
Draft = poor quality suitable only for testing and internal use
What is the difference between impact and non-impact printers?
Impact printers have a mechanism that physically pushes the character forming device against
the print ribbon and paper underneath it. Non-impact printers form characters with ink or
toner without actually hitting the paper.
What are the main kinds of impact printers? How do they form their characters? What are their advantages
and disadvantages?
Dot matrix - uses sets of pins to form characters. Advantage - inexpensive, does multicopy
forms. Disadvantage - slow and loud
6.
7.
Daisy wheel - uses a circle of typewriter-type petals with characters fully formed. Advantage best print quality. Disadvantage - very slow and can’t print graphics.
Chain and band printers - have typewriter type characters on a moving band or chain.
Advantage - very fast. Disadvantage - very expensive and very loud
What are the main kinds of non-impact printers? How do they form their characters? What are their
advantages and disadvantages?
Ink jet - forms character by spraying ink onto paper. Advantage - quiet, high quality text, does
graphics, some do color. Disadvantage - cannot use multiple-copy paper, ink can smear
Thermal - uses heat on chemically treated paper to form characters. Advantage - quiet.
Disadvantage - fairly slow, expensive, needs special paper, can not use multiple-copy paper
Page printer - like a copy machine uses toner and heat bar to form characters. Advantage quiet, faster than other non-impact printers, high quality print and graphics, some do color.
Disadvantage - more expensive than impact printer, cannot use multiple-copy paper
What are the various names used for display device that looks like a television?
Monitor, screen, VDT = video display terminal, CRT = cathode ray tube.
8. What are the RGB and the CMYK color systems? Which is used for what?
RGB = red, green, blue All colors are formed using phosphor dots on screen with these three
colors of dots.
CMYK = cyan, magenta, yellow, black All colors are formed using printed dots in these 4
colors.
9. Why would you want an interlaced screen? How does that work?
An interlaced screen has less visible flicker because it lights up every other row of phosphor
dots on the screen before returning to the top to light the other set of dots.
10. What is the refresh rate? What would a desirable refresh rate be?
Refresh rate is how often a screen is redrawn from top to bottom. A minimum refresh rate that
is comfortable to the eye is 60 times per second. 75 or higher is even better and may be necessary
for some people on some monitors.