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US 5,805,460 AGranted
Method for measuring RF pulse rise time, fall time and pulse width
AssigneeAlliedSignal Inc.
InventorsElliott J. Greene, Pei-Hwa Lo
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Abstract
A method for measuring the rise/fall time and pulse width of RF pulses using multi-purpose, commercial-off-the-shelf test devices, such as an RF signal down converter, a digitizer and a signal processor. The method is based on digitizing the RF signals and developing an average sample pulse waveform. The rise/fall time and pulse width are then calculated from data points on the sample waveform. The method is suitable for real-time calculations of the rise/fall time and pulse width.
Claims4
A method for measuring pulse characteristics of a pulsed RF signal comprising:
- (a) down converting said pulsed RF signal to an intermediate pulse stream signal having an intermediate frequency;
- (b) sampling said down converted signal over a selected number of cycles at a selected sampling frequency such that the intermediate frequency is greater than 50% of the sampling frequency, but less than the sampling frequency whereby the sampling collects a data set comprising one or two data points per cycle of the intermediate frequency wherein said data set represents a single pulse;
- (c) collecting multiple data sets;
- (d) collecting within each of said data sets, data points before, during and after each pulse;
- (e) averaging said data sets to obtain a sample pulse envelope comprising baseline points, a rising edge, a pulse plateau and a falling edge;
- and
- (f) calculating one or more of said pulse characteristics consisting of rise time, fall time and pulse width.
4 more elements
Dependencies are inferred from the claim text.