Graphic actuation of test and measurement triggers

• US 9,784,765 B2
• Filed: 11/03/2009
• Issued: 10/10/2017
• Est. Priority Date: 03/13/2009
• Status: Active Grant

• Current Assignee: Tektronix Incorporated (Fortive Corp.)
• Original Assignee: Tektronix Incorporated (Fortive Corp.)
• Inventors: Engholm, Kathryn A., Case, Cecilia A.
• Primary Examiner(s): Le, Toan
• Assistant Examiner(s): Sun, Xiuquin
• Application Number:
  US12/611,302
• Publication Number:
  US 20100235131A1
• Time in Patent Office: 2,898 Days
• Field of Search: 702108, 702123, 716102, 704252
• CPC Class Codes: G01R 13/0254 for triggering, synchronisation
• CPC Class Codes: G01R 13/029 Software therefor

Abstract

A system and method are provided for graphically actuating a trigger in a test and measurement device. The method includes displaying a visual representation of signal properties for one or more time-varying signals. A graphical user input is received, in which a portion of the visual representation is designated. The method further includes configuring a trigger of the test and measurement device in response to the graphical user input, by setting a value for a trigger parameter of the trigger. The set value for the trigger parameters varies with and is dependent upon the particular portion of the visual representation that is designated by the graphical user input. The trigger is then employed in connection with subsequent monitoring of signals within the test and measurement device.

Claims

1. A method of configuring and running triggering operations in a real-time spectrum analyzer comprising:

receiving a first time-varying signal from a device under test;

generating a frequency-domain bitmap based on a plurality of frequency domain spectrums from the first time-varying signal, such that the frequency domain bitmap indicates a number of occurrences of amplitudes for each frequency of the frequency domain bitmap over a period of time;

displaying, on a display of the real-time spectrum analyzer, the frequency-domain bitmap;

receiving a user input that graphically designates a portion of the frequency domain bitmap;

determining, by the real-time spectrum analyzer, a signal condition associated with the graphically designated portion of the frequency domain bitmap;

setting, for a trigger of the real-time spectrum analyzer, a value of a trigger parameter based on the determined signal condition;

monitoring a second time-varying signal for trigger occurrences using the value of the trigger parameter;

detecting an occurrence of the trigger within the second time varying signal; and

in response to detecting the occurrence of the trigger, storing at least a part of the second time-varying signal in a data-holding subsystem of the real-time spectrum analyzer for additional offline processing.

2. The method of claim 1, wherein generating the frequency-domain bitmap from the first time-varying signal further comprises:

sampling the first time-varying signal at different points in time;

generating the plurality of frequency domain spectrums based on the sampling.

3. The method of claim 1, wherein the signal condition is a signal occupancy in a region of the frequency domain bitmap defined based on the graphically designated portion of the frequency domain bitmap, and wherein the signal occupancy is based on the number of times the first time-varying signal occurs within the region.

4. The method of claim 1, wherein determining the signal condition includes measuring or calculating the property of the graphically designated portion of the frequency domain bitmap.

5. The method of claim 1, wherein the first time-varying signal and the second time-varying signal are a first portion and a second portion, respectively, of the same time-varying signal that occur over different time-frames, and wherein storing at least the part of the second time-varying signal in a data-holding subsystem of the real-time spectrum analyzer comprises storing the second portion in the data-holding subsystem.

6. The method of claim 1, wherein the frequency domain bitmap visually distinguishes between a number of occurrences of frequencies and corresponding amplitudes included within the first time-varying signal over a period of time.

7. The method of claim 1, wherein the graphically designated portion identifies a phenomenon of the time varying signal represented in the frequency domain bitmap.

8. The method of claim 1, further comprising:

configuring an occupancy threshold,

wherein determining the signal condition associated with the graphically designated portion of the frequency domain bitmap includes determining a signal occupancy associated with the graphically designated portion of the frequency domain bitmap, and

wherein setting the value of the trigger parameter is based on the signal occupancy and the occupancy threshold.

9. The method of claim 1, further comprising selecting the trigger from one of a plurality of available triggers prior to receiving the user input.

10. The method of claim 1, where the setting of the value of the trigger parameter is performed automatically upon receiving the user input, and without requiring any further user input.

11. One or more non-transitory computer-readable storage media having computer-executable instructions stored thereon, which, when executed by a real-time spectrum analyzer configure the real-time spectrum analyzer to:

generate a frequency-domain bitmap based on a plurality of frequency domain spectrums of a first time-varying signal received from a device under test, such that the frequency domain bitmap indicates a number of occurrences of amplitudes for each frequency of the frequency domain bitmap over a period of time;

receive user input that graphically selects a region of interest of the frequency domain bitmap displayed on a display of the real-time spectrum analyzer;

responsive to the user input, determine a signal condition associated with the region of interest based on a property, of the first time-varying signal, depicted within the region of interest;

set, for a trigger of the real-time spectrum analyzer, a value of a trigger parameter based on the signal condition

monitor a second time-varying signal for trigger occurrences using the value of the trigger parameter;

detect an occurrence of the trigger within the second time varying signal; and

in response to the detection of the occurrence of the trigger, store at least a part of the second time-varying signal in a data-holding subsystem of the real-time spectrum analyzer for additional offline processing.

12. The one or more non-transitory computer-readable media of claim 11, wherein the frequency domain bitmap visually distinguishes between a number of occurrences of frequencies and corresponding amplitudes included within the first time-varying signal.

13. The one or more non-transitory computer-readable media of claim 11, wherein the instructions further configure the real-time spectrum analyzer to:

configuring an occupancy threshold,

wherein the signal condition is a signal occupancy, and

wherein to set the value of the trigger parameter is based on the signal occupancy and the occupancy threshold.

14. The one or more non-transitory computer-readable media of claim 11, wherein to determine the signal condition includes measurement or calculation of a signal occupancy of the first time-varying signal within the region of interest.

15. A real-time spectrum analyzer, configured to:

receive a first time-varying signal from a device under test;

generate a frequency-domain bitmap based on a plurality of frequency domain spectrums from the first time-varying signal, such that the frequency domain bitmap indicates a number of occurrences of amplitudes for each frequency of the frequency domain bitmap over a period of time;

display the frequency domain bitmap on a display of the real-time spectrum analyzer;

receive a user input that graphically selects a portion of the frequency domain bitmap; and

determine, in response to the user input, a signal condition associated with the graphically selected portion of the frequency domain bitmap;

set, for a trigger of the real-time spectrum analyzer, a value of a trigger parameter based on the determined signal condition

monitor a second time-varying signal for trigger occurrences using the value of the trigger parameter;

detect an occurrence of the trigger within the second time varying signal; and

in response to the detection of the occurrence of the trigger, store at least a part of the second time-varying signal in a data-holding subsystem of the real-time spectrum analyzer for additional offline processing.

16. The real-time spectrum analyzer of claim 15, wherein the real-time spectrum analyzer is further configured to:

determine an occupancy threshold,

wherein the signal condition is a signal occupancy that is based on the number of times the first time-varying signal occurs within a region of the frequency domain bitmap identified by the graphically selected portion, and

wherein to set the value of the trigger parameter is based on the signal occupancy and the occupancy threshold.

17. The real-time spectrum analyzer of claim 15, wherein to generate the frequency-domain bitmap from the first time-varying signal the real-time spectrum analyzer is further configured to:

generate frequency domain spectrums based on the first time-varying signal, and wherein the frequency domain bitmap is generated based on the frequency domain spectrums.

18. The real-time spectrum analyzer of claim 15, wherein to determine the signal condition includes measuring or calculating the property of a region of the frequency domain bitmap that is identified based on the graphically selected portion.

19. The real-time spectrum analyzer of claim 18, wherein the first time-varying signal and the second time-varying signal are a first portion and a second portion, respectively, of the same time-varying signal that occur over different time frames, and wherein to store at least the part of the second time-varying signal in a data-holding subsystem of the real-time spectrum analyzer comprises storing the second portion in the data-holding subsystem.

20. The real-time spectrum analyzer of claim 18, wherein the frequency domain bitmap visually distinguishes between a number of occurrences of frequencies and corresponding amplitudes included within the first time-varying signal over a period of time.

21. The real-time spectrum analyzer of claim 15, further configured to:

receive a selection from a user of a trigger of a plurality of available triggers prior to receiving the user input.

22. The real-time spectrum analyzer of claim 21, wherein the signal condition is a signal occupancy in a region of the frequency domain bitmap defined based on the graphically selected portion of the frequency domain bitmap, and wherein the signal occupancy is based on the number of times the first time-varying signal occurs within the region.