Dell 3115CN - Page 717

6 – 4
Chapter 6 Principle of Operation (Fax)
Version 1 2006.11.21
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Analog signal
Digital signal
Voltage
Time
Voltage
Time
Voltage
Time
The signal is converted to 1 or 0 depending on
whether it is higher or lower than a threshold value.
In other words, the waveform is quantified.
Threshold value
Higher = 1
Lower = 0