Hand-held tester for communications ports of a data processor

Details Hand-held tester for communications ports of a data processor Hand-held tester for communications ports of a data processor

1988-06-20

1990-07-10

Lall, Parshotam S.

Boots, shoes, and leggings

371 204, 371 221, 371 24, 371 165, 371 572, H04M 156, H04B 350

Patent

active

049411152

ABSTRACT:
A hand-held battery-powered instrument tests communications ports of a data-processing system by analyzing received data frames for multiple conditions, such as parity, poll commands, and violation sequences. Indicator lights show proper/improper operation of the port, and also indicate phase reversal of the lines.

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patent: 4498716 (1985-02-01), Ward
patent: 4567592 (1986-01-01), Minicilli
patent: 4581738 (1986-04-01), Miller et al.
patent: 4620282 (1986-10-01), Shelley
patent: 4622647 (1986-11-01), Sagnard et al.
patent: 4628511 (1986-12-01), Stitzlein et al.
patent: 4665521 (1987-05-01), Smith
patent: 4697138 (1987-09-01), Morishita et al.
patent: 4788492 (1988-11-01), Schubert
JDR Microdevices, "Mini-Tester", p. 12, winter 1987 catalog.
TEK Products 1988, "Data Communications Analyzers", p. 159 (#'s 834/835/836).

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