Cliff W Harris

US Patent:

40743586, Feb 14, 1978

Filed:

Dec 2, 1976

Appl. No.:

5/746809

Inventors:

Salvatore Caputo - Long Branch NJ
Scott M. Fitch - Holmdel NJ
Cliff A. Harris - Albuquerque NM
John Kuhar - Middletown NJ
Andrew L. Pappas - Tinton Falls NJ
Wayne Redlich - Freehold NJ

Assignee:

Bell Telephone Laboratories, Incorporated - Murray Hill NJ

International Classification:

G01R 2902
H04B 1500
G06F 1520

US Classification:

364514

Abstract:

Time jitter distortion of data pulses is measured by a test set which recovers a median leading and a median trailing edge from the data pulses, defines a point of time reference at the midpoint of the median leading and trailing edges, generates a digital representation of one-half the median pulse interval (i. e. , the interval from the reference time to the median pulse edge) and digital representations of the intervals from the reference time to the data pulse edges, and calculates the difference between each data pulse digital representation and the half median pulse digital representation to obtain the distortion of each data pulse. The test set displays digital representations of selected ones of the calculated differences in accordance with a counting algorithm of the number of times that each of the various differences are calculated.

US Patent:

62301055, May 8, 2001

Filed:

Jan 21, 2000

Appl. No.:

9/489128

Inventors:

Cliff A. Harris - Albuquerque NM
Jerry T. Love - Stanley NM

Assignee:

Bolt, Inc. - Albuquerque NM

International Classification:

G01R 1500
G06F 1900

US Classification:

702 57

Abstract:

An apparatus and method for measuring the transfer impedance of a structure. Oscillator driver 20 produces a small electrical drive signal into structure 40. Field probe 30 detects the electric field produced by the drive signal and is comprised of a skinny half-dipole and fat half-dipole antenna. Fat half-dipole 34 encloses synchronous detection circuitry. Power supplies are isolated for all components. Base station 10 communicates with oscillator driver 20 and field probe 30 via wireless links 92 and 44 to control the drive signal, the synchronous detection, and to determine the transfer impedance.