Optical time domain reflectometer
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United States of America Patent
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Jan 19, 2010
Grant Date -
May 8, 2008
app pub date -
Nov 7, 2007
filing date -
Nov 8, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical time domain reflectometer (OTDR) launches an optical pulse emitted from a pulse light source to one end side of an optical fiber, receives light returning to the one end side with an optical receiver, inputs an output signal of the optical receiver to an A/D converting unit so as to convert the signal to an N bit (N is the plural number) digital signal, implements a process for the N bit digital signal, and measures the transmission characteristics of the optical fiber. The A/D converting unit has the number of bits that is greater than the N bits by the number of A bits, wherein A is an integer greater than “0”. The A/D converting unit converts an input signal to an N+A bit digital signal, and compresses the N+A bit digital signal to N bit data.
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