Cable tester

Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C324S534000

Reexamination Certificate

active

10997119

ABSTRACT:
A physical layer device communicates over a cable and includes a cable tester that determines a cable status, which includes an open status, a short status and a normal status. The cable tester includes a pretest module that senses activity on the cable and selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, 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 digital signal processor (DSP) communicates with the cable and that has a digital gain parameter. A cable length estimator communicates with the DSP and estimates cable length based on the digital gain parameter.

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: 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. 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”, Jan. 2001, pp. 1-14.
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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Cable tester does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cable tester, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cable tester will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3881879

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.