In telecommunication, the term white facsimile transmission has the following meanings:
- In an amplitude-modulated facsimile system, transmission in which the maximum transmitted power corresponds to the minimum density, i.e., the white area, of the object.
- In a frequency-modulated facsimile system, transmission in which the lowest transmitted frequency corresponds to the minimum density i.e., the white area, of the object.
Both of these terms became outmoded in the late 20th century except in specialist usage, as most fax machines now use the digital ITU-T fax standards, which encode the image digitally over a QAM-modulated signal. See also Black facsimile transmission.
Famous quotes containing the words white and/or facsimile:
“Then came the Lord Chamberlain with his white staff,
And all the people began to laugh;
And then the Queen began to speak,
‘You’re welcome home, Sir Francis Drake.’”
—Unknown. Upon Sir Francis Drake’s Return from His Voyage about the World, and the Queen’s Meeting Him (l. 5–8)
“God gave the righteous man a certificate entitling him to food and raiment, but the unrighteous man found a facsimile of the same in God’s coffers, and appropriated it, and obtained food and raiment like the former. It is one of the most extensive systems of counterfeiting that the world has seen.”
—Henry David Thoreau (1817–1862)