DocumentCode
1315813
Title
Crosstalk injection when testing transmission systems
Author
Cook, J.W.
Author_Institution
British Telecom Res. Labs., Ipswich, UK
Volume
26
Issue
15
fYear
1990
fDate
7/19/1990 12:00:00 AM
Firstpage
1181
Lastpage
1183
Abstract
One of the key performance requirements specified for local loop transmission systems is that of performance in the presence of crosstalk. Objective testing requires the injection of known levels of synthetic crosstalk into test copper pair loops with variable and frequency dependent impedances. It has been shown that a transformer with multiple secondaries in combination with a high performance buffer amplifier can be used to inject controlled levels of synthetic crosstalk without the use of complicated calibration procedures.
Keywords
ISDN; crosstalk; electronic equipment testing; subscriber loops; transformers; Cu pairs; NEXT; crosstalk injection; frequency dependent impedances; high performance buffer amplifier; local loop transmission systems; performance requirements; synthetic crosstalk; test pair loops; testing transmission systems; transformer with multiple secondaries; variable impedances;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:19900764
Filename
82934
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