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GENERAL DESCRIPTION OF A FACSIMILE
(3) Conversion into electrical signals
Black
converted into Low level signals.
(4) Modulation
The picture signals are modulated. (This figure shows an example of fre-
quency modulation.)
2–10
pixels
are converted into High level signals, and white pixels are
1
2
3
4
a
b
c
d
e
f
g
h
Fig. 2-5 Conversion into Electrical Signals
1
2
3
4
5
a
b
c
d
e
f
g
h
High level signal
Low level signal
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6
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8
6
7
8
1
a
b
c
d
e
f
g
h
Fig. 2-6 Modulation
High level signal
Low level signal
2
3
4
5
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7
High frequency
Low frequency
8
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