Method and apparatus for mapping printed circuit fields

Details Method and apparatus for mapping printed circuit fields Method and apparatus for mapping printed circuit fields

1990-05-30

1991-07-02

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324158P, 324 95, G01R 2104, G01R 3102

Patent

active

050288660

ABSTRACT:
An electromechanical XY carriage sweeps a magnetic or electrical field probe across a circuit board line by line to acquire field strength data as a function of probe position relative to the board. Colored field maps are produced. The carriage is controllable to obtain very high resolution data. A magnetic probe includes a single loop oriented parallel to the board or a loop oriented perpendicular to the board and selectively parallel to or perpendicular to the x axis of the carriage. Different field maps are produced by different probe orientations and each provides information regarding the circuit traces which carry rf currents.

REFERENCES:
patent: 3463007 (1969-08-01), Jones et al.
patent: 3848189 (1974-11-01), Pope
patent: 4354153 (1982-10-01), Lentz
patent: 4565967 (1986-01-01), Eisenbrandt et al.
patent: 4829238 (1989-05-01), Goulette et al.
"A Faster Way to Check Circuit Boards for EMI", Electronics, Apr. 21, 1986, pp. 24-25.
"EMSCAN: A Tool to Measure EMI Emissions from Printed Circuit Packs", EMC Testing, Nov.-Dec. 1989, pp. 4-5.

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