Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2008-05-20
2008-05-20
Hirshfeld, Andrew H. (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C324S533000, C324S543000
Reexamination Certificate
active
07375532
ABSTRACT:
A physical layer device comprises a first port adapted to communicate with one end of a cable. A second port is adapted to communicate with an opposite end of a cable. A cable tester communicates with the first and second ports and selectively tests the cable to determine a cable status, which includes an open status, a short status, and a normal status. The cable tester includes a test module that transmits a test pulse on the cable, measures a reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator that receives the signals on the second port and that estimates insertion loss.
REFERENCES:
patent: 4914394 (1990-04-01), Meyer
patent: 5420512 (1995-05-01), Spillane et al.
patent: 5461318 (1995-10-01), Borchert et al.
patent: 6138080 (2000-10-01), Richardson
patent: 6198727 (2001-03-01), Wakeley et al.
patent: 6377640 (2002-04-01), Trans
patent: 6434716 (2002-08-01), Johnson et al.
patent: 6438163 (2002-08-01), Raghavan et al.
patent: 6448899 (2002-09-01), Thompson
patent: 6522152 (2003-02-01), Tonti et al.
patent: 6535983 (2003-03-01), McCormack et al.
patent: 6694017 (2004-02-01), Takada
patent: 6728216 (2004-04-01), Sterner
patent: 6775529 (2004-08-01), Roo
patent: 6825672 (2004-11-01), Lo
patent: 6829223 (2004-12-01), Richardson et al.
patent: 6898185 (2005-05-01), Agazzi et al.
patent: 2002/0124110 (2002-09-01), Tanaka
patent: WO 01/11861 (2001-02-01), None
patent: WO 01/11861 (2001-02-01), None
patent: WO 01/11861 (2001-02-01), None
U.S. Appl. No. 09/678,728, filed Oct. 4, 2000.
U.S. Appl. No. 60/217,418, filed Jul. 11, 2000.
U.S. Appl. No. 10/098,865, filed Mar. 15, 2002.
U.S. Appl. No. 09/991,043, filed Nov. 21, 2001.
Intel, “LXT9784 Octal 10/100 Transceiver Hardware Integrity Function Overview” Application Note, Jan. 2001, pp. 3-14.
IEEE std. 802.3 IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements; Part 3: Carrier sense multiple access with collison detection (CSMA/DC) access method and physical layer specifications, 2002, pp. 1-173.
IEEE Computer Society; IEEE Standard 802.3ab; IEEE Std 802.3-2002, IEEE Standard for Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements; Part 3: Carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer specifications, Mar. 8, 2002, pp. 147-249.
Guo Yiqing
He Runsheng
Janofsky Eric
Leung Tsin-Ho
Lo William
Dole Timothy J
Hirshfeld Andrew H.
Marvell International Ltd.
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