Browse Prior Art Database

BANDWIDTH-BASED TRIGGERING

IP.com Disclosure Number: IPCOM000254179D
Publication Date: 2018-Jun-06
Document File: 19 page(s) / 5M

Publishing Venue

The IP.com Prior Art Database

Abstract

Dannel Johnson Paralegal CPA Global - IPSS CPA Global 900 Second Avenue South, Suite 600 Minneapolis, MN 55402 Direct: 612-236-9928 Main: 612-236-9990 Fax: 612-677-3572 Email: Djohnson@cpaglobal.com [cid:image001.png@01D3FD8C.819DD650] CPA Global is the world's leading IP management and technology company. We offer customers The IP Platform: delivering integrated Innovation and IP Portfolio software, services and insights across the entire Idea Lifecycle, supporting customers every step of the way to realise the value of their ideas. IP One Data is at the heart of The IP Platform - empowering our customers with comprehensive, verified and reliable data. We are trusted by many of the world's leading corporations and law firms, and backed by a global team of more than 2,000 passionate and visionary people. [cid:image002.png@01D19BDB.0B100F40] [cid:image003.png@01D19BDB.0B100F40] [cid:image004.png@01D19BDB.0B100F40] [Instagram_logo_small] ________________________________ If you wish to view the CPA Global group email disclaimer, please click here ________________________________

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 12% of the total text.

BANDWIDTH-BASED TRIGGERING

Various types of triggers can be used to produce time domain or frequency domain representations of a signal on a display screen of a test instrument.  For example, an amplitude-based trigger can be used to display a time domain representation of a signal upon an oscilloscope screen.  The amplitude-based trigger generates a display of the signal on the oscilloscope screen each time an amplitude of the signal exceeds the trigger amplitude.  In some applications, the amplitude-based trigger may be supplemented or replaced by other types of triggers such as an edge-based trigger or a pulse width-based trigger.  For example, when a combination of an amplitude-based trigger and a rising edge-based trigger is used, a signal is displayed on the display screen of the oscilloscope when a rising edge of the signal exceeds the trigger amplitude.  In another example, when a combination of an amplitude-based trigger and a falling edge-based trigger is used, a signal is displayed on the display screen when a falling edge of the signal falls below the trigger amplitude.  In yet another example, when a pulse width-based trigger is used, a signal is displayed on the display screen of the oscilloscope when the width of a signal pulse exceeds a pulse width, and an amplitude of the signal pulse exceeds a threshold amplitude, specified by the pulse width-based trigger.  

Signals can be viewed in the frequency domain by using certain types of frequency-based triggers.  For example, some signals can be viewed on a screen of a signal analyzer by using a frequency mask trigger.  The frequency mask trigger produces a real-time display of the signal on the screen of the signal analyzer whenever a particular spectral component of the signal violates a power level indicated by the frequency mask trigger.  The frequency mask trigger may be supplemented by using various conditions for qualifying a trigger event.  For example, one condition involves validating a frequency mask trigger by verifying that the signal exceeds the power level indicated by the frequency mask trigger a specified number of times.  In another example, another condition involves validating a frequency mask trigger by verifying that the signal exceeds the power level indicated by the frequency mask trigger for a specified period of time.

The frequency mask triggers described above may be appropriate for certain types of applications.  However, such frequency mask triggers are static in nature and may not accurately track dynamic signals that change in frequency and/or amplitude over time. A traditional single frequency mask trigger can be useful if the signal of interest occurs repetitively at the same frequency.  However, in many applications, FFTs may be derived from a signal that varies in frequency and/or bandwidth across a frequency spectrum.  Using the traditional single frequency mask trigger upon such FFTs provides sporadic and non-comprehensive trigge...