Ronald C Potter

US Patent:

53008782, Apr 5, 1994

Filed:

Nov 19, 1992

Appl. No.:

7/978551

Inventors:

Jay M. Wardle - Seattle WA
Ronald W. Potter - Snohomish WA
John A. Gibbs - Lynnwood WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01R 2316

US Classification:

324 7627

Abstract:

The sweep rate limitations that heretofore have constrained the maximum sweep rates of swept analysis instruments are obviated by optimizing filter circuitry and post-processing the IF signal using various techniques to compensate for errors caused by fast sweeping.

US Patent:

51171791, May 26, 1992

Filed:

Mar 13, 1990

Appl. No.:

7/493590

Inventors:

Jay M. Wardle - Seattle WA
Ronald W. Potter - Snohomish WA
John A. Gibbs - Lynnwood WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01R 2702

US Classification:

324 77CS

Abstract:

The sweep rate limitations that heretofore have constrained the maximum sweep rates of swept analysis instruments are obviated by optimizing filter circuitry and post-processing the IF signal using various techniques to compensate for errors caused by fast sweeping.

US Patent:

54205140, May 30, 1995

Filed:

Feb 7, 1994

Appl. No.:

8/192927

Inventors:

Jay M. Wardle - Seattle WA
Ronald W. Potter - Snohomish WA
John A. Gibbs - Lynnwood WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01R 2316

US Classification:

324615

Abstract:

The sweep rate limitations that heretofore have constrained the maximum sweep rates of swept analysis instruments are obviated by optimizing filter circuitry and post-processing the IF signal using various techniques to compensate for errors caused by fast sweeping. Some selective windowing is also used to compensate for distortions due to fast sweep rates.

US Patent:

51682133, Dec 1, 1992

Filed:

Jan 9, 1992

Appl. No.:

7/819147

Inventors:

Jay M. Wardle - Seattle WA
Ronald W. Potter - Snohomish WA
John A. Gibbs - Lynnwood WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G01R 2316

US Classification:

324 77CS

Abstract:

The sweep rate limitations that heretofore have constrained the maximum sweep rates of swept analysis instruments (10,38) are obviated by optimizing filter circuitry (24,32,34,46) and post-processing the IF signal using various techniques to compensate for errors caused by fast sweeping.

US Patent:

49126610, Mar 27, 1990

Filed:

Dec 1, 1987

Appl. No.:

7/127356

Inventors:

Ronald W. Potter - Mill Creek WA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

G06F 1546
G01H 100

US Classification:

364550

Abstract:

A tracking and resampling method for monitoring the performance of a rotating machine (10) is disclosed. One or more measuring devices (13) provide rotating machine performance data to a signal processor (14) that samples the performance data at uniform time increments. A digitized waveform of the sampled performance data is interpolated by an interpolation filter. The sampled performance data is convolved with the impulse response of the interpolation filter to provide a continuous time function waveform depicting the rotating machine performance data. The signal processor (14) resamples the continuous time function waveform at uniform rotating shaft phase angle increments.