US 11,811,449 B2
High speed bidirectional optical time-domain reflectometer (OTDR)-based testing of device under test
Charlène Roux, Chamboeuf (FR); and Julien Barrier, Saint Jean Bonnefonds (FR)
Assigned to VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed by VIAVI SOLUTIONS INC., Chandler, AZ (US)
Filed on Jul. 11, 2022, as Appl. No. 17/861,436.
Application 17/861,436 is a division of application No. 17/157,636, filed on Jan. 25, 2021, granted, now 11,431,408.
Claims priority of application No. 20306322 (EP), filed on Nov. 4, 2020.
Prior Publication US 2022/0345216 A1, Oct. 27, 2022
Int. Cl. H04B 10/071 (2013.01); H04B 10/25 (2013.01); H04B 10/50 (2013.01); H04B 10/66 (2013.01); H04B 10/40 (2013.01)
CPC H04B 10/071 (2013.01) [H04B 10/25 (2013.01); H04B 10/50 (2013.01); H04B 10/66 (2013.01); H04B 10/40 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a data transmitter, executed by at least one hardware processor, to
transmit data from a first end of a device under test (DUT) towards an optical time-domain reflectometer (OTDR) that is operatively connected to a second opposite end of the DUT;
a data receiver, executed by the at least one hardware processor, to
receive further data that is transmitted by the OTDR from the second opposite end of the DUT towards the first end of the DUT;
an optical attenuator to adjust a level of power of an optical source that transmits the data from the first end of the DUT towards the OTDR; and
a receiver level controller, executed by the at least one hardware processor, to
adjust, based on an amplitude of the further data, a direction of receiving of the further data towards a high amplitude first receiver of the data receiver that is designated to receive high amplitude further data or towards a low amplitude second receiver of the data receiver that is designated to receive low amplitude further data.