Method for digitally acquiring and compensating signals

• US 7,110,898 B2
• Filed: 07/26/2004
• Issued: 09/19/2006
• Est. Priority Date: 07/26/2004
• Status: Expired due to Fees

• Current Assignee: Agilent Technologies, Inc.
• Original Assignee: Agilent Technologies, Inc.
• Inventors: Montijo, Allen, Grove, Martin B.
• Primary Examiner(s): Tsai, Carol S. W.
• Application Number:
  US10/898,873
• Publication Number:
  US 20060020407A1
• Time in Patent Office: 785 Days
• Field of Search: None
• US Class Current: 702/67
• CPC Class Codes: G01R 13/0254 for triggering, synchronisation

Abstract

A method of data acquisition for a digital instrument having a bandwidth. The method includes receiving a signal and associated trigger. Using that trigger, a plurality of signal values is sampled at multiple time intervals to create an acquisition record representing a continuous fractional segment of the signal. The plurality of samples meets the Nyquist requirement for the bandwidth but is in error according to at least one known error mechanism. The acquisition record is then processed with DSP techniques to produce a compensated acquisition record corrected for the at least one known error mechanism. Each associated compensated acquisition record is incorporated into a result acquisition record as a segment thereof corresponding to a continuous fractional segment of the signal whose signal values were sampled in an associated instance. An additional signal and additional associated trigger are received. The above steps are then repeated for the additional signal and additional associated trigger.

Claims

1. A method of data acquisition from a signal by a digital instrument having a bandwidth, comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) for a different continuous fractional segment of the signal at least once;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger; and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

2. A method as in claim 1, further comprising the step of:

displaying the data comprising at least one compensated acquisition record.

6. A method as in claim 1, wherein the spans of the acquisition records of step (b) are different from one another.

7. A method as in claim 1, wherein the digital instrument is a digital oscillographic instrument.

3. A method of data acquisition from a signal by a digital instrument having a bandwidth, comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger, wherein the acquisition records of step (b) and the compensated acquisition records of step (c) are consecutive and adjacent continuous fractional segments of the resultant acquisition record of step (e); and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

17. A method as in claim 3, further comprising the step of:

displaying the data comprising at least one compensated acquisition record.

18. A method as in claim 3, wherein the spans of the acquisition records of step (b) are different from one another.

19. A method as in claim 3, wherein the digital instrument is a digital oscillographic instrument.

4. A method of data acquisition from a signal by a digital instrument having a bandwidth, comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger, wherein the acquisition records of step (b) and the compensated acquisition records of step (c) are non-adjacent continuous fractional segments of the resultant acquisition record of step (e); and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

20. A method as in claim 4, further comprising the step of:

displaying the data comprising at least one compensated acquisition record.

21. A method as in claim 4, wherein the spans of the acquisition records of step (b) are different from one another.

22. A method as in claim 4, wherein the digital instrument is a digital oscillographic instrument.

5. A method of data acquisition from a signal by a digital instrument having a bandwidth, comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger and overlapping the span of the acquisition records of step (b) such that the ending portion of one compensated acquisition record corresponds to a beginning portion of another;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger; and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

23. A method as in claim 5, further comprising the step of:

displaying the data comprising at least one compensated acquisition record.

24. A method as in claim 5, wherein the spans of the acquisition records of step (b) are different from one another.

25. A method as in claim 5, wherein the digital instrument is a digital oscillographic instrument.

8. A method of data acquisition from a signal by a digital instrument having a bandwidth, comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger;

repeating steps (b) thru (e) for additional signal and additional associated trigger;

receiving a second additional signal and a second additional associated trigger, wherein the second additional associated trigger is the same as the additional associated trigger; and

repeating steps (b) thru (e) for the second additional signal.

26. A method as in claim 8, further comprising the step of:

displaying the data comprising at least one compensated acquisition record.

27. A method as in claim 8, wherein the spans of the acquisition records of step (b) are different from one another.

28. A method as in claim 8, wherein the digital instrument is a digital oscillographic instrument.

9. A computer readable memory device embodying a computer program of instructions executable by the computer for data acquisition from a signal by a digital instrument having a bandwidth, the instructions comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) for a different continuous fractional segment of the signal at least once;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger; and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

10. The computer readable memory device as recited in claim 9, further comprising:

displaying the data comprising at least one compensated acquisition record.

14. The computer readable memory device as recited in claim 9, wherein the spans of the acquisition records of step (b) are different from one another.

15. The computer readable memory device as recited in claim 9, wherein the digital instrument is a digital oscillographic instrument.

11. A computer readable memory device embodying a computer program of instructions executable by the computer for data acquisition from a signal by a digital instrument having a bandwidth, the instructions comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger, wherein the acquisition records of step (b) and the compensated acquisition records of step (c) are consecutive and adjacent continuous fractional segments of the resultant acquisition record of step (e); and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

29. The computer readable memory device as recited in claim 11, further comprising:

displaying the data comprising at least one compensated acquisition record.

30. The computer readable memory device as recited in claim 11, wherein the spans of the acquisition records of step (b) are different from one another.

31. The computer readable memory device as recited in claim 11, wherein the digital instrument is a digital oscillographic instrument.

12. A computer readable memory device embodying a computer program of instructions executable by the computer for data acquisition from a signal by a digital instrument having a bandwidth, the instructions comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger, wherein the acquisition records of step (b) and the compensated acquisition records of step (c) are non-adjacent continuous fractional segments of the resultant acquisition record of step (e); and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

32. The computer readable memory device as recited in claim 12, further comprising:

displaying the data comprising at least one compensated acquisition record.

33. The computer readable memory device as recited in claim 12, wherein the spans of the acquisition records of step (b) are different from one another.

34. The computer readable memory device as recited in claim 12, wherein the digital instrument is a digital oscillographic instrument.

13. A computer readable memory device embodying a computer program of instructions executable by the computer for data acquisition from a signal by a digital instrument having a bandwidth, the instructions comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger and overlapping the span of the acquisition records of step (b) such that the ending portion of one compensated acquisition record corresponds to a beginning portion of another;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger; and

repeating steps (b) thru (e) for additional signal and additional associated trigger.

35. The computer readable memory device as recited in claim 13, further comprising:

displaying the data comprising at least one compensated acquisition record.

36. The computer readable memory device as recited in claim 13, wherein the spans of the acquisition records of step (b) are different from one another.

37. The computer readable memory device as recited in claim 13, wherein the digital instrument is a digital oscillographic instrument.

16. A computer readable memory device embodying a computer program of instructions executable by the computer for data acquisition from a signal by a digital instrument having a bandwidth, the instructions comprising:

(a) receiving a signal and associated trigger;

(b) based on the associated trigger, sampling at multiple time intervals a plurality of signal values to create an acquisition record representing continuous fractional segment of the signal, the plurality of samples meeting Nyquist requirement for the bandwidth but in error according to at least one known error mechanism, and the plurality of samples being located time relative to the associated trigger;

(c) subsequent to step (b), processing acquisition record with DSP techniques to produce compensated acquisition record corrected for the at least one known error mechanism;

(d) repeating sequenced pairs steps (b) and (c) at least one time;

(e) subsequent each instance of step (d), incorporating associated compensated acquisition record into resultant acquisition record as segment thereof corresponding to continuous fractional segment of signal whose signal values were sampled in associated instance of step (b);

(f) receiving additional signal and additional associated trigger;

repeating steps (b) thru (e) for additional signal and additional associated trigger;

receiving a second additional signal and a second additional associated trigger, wherein the second additional associated trigger is the same as the additional associated trigger; and

repeating steps (b) thru (e) for the second additional signal.

38. The computer readable memory device as recited in claim 16, further comprising:

displaying the data comprising at least one compensated acquisition record.

39. The computer readable memory device as recited in claim 16, wherein the spans of the acquisition records of step (b) are different from one another.

40. The computer readable memory device as recited in claim 16, wherein the digital instrument is a digital oscillographic instrument.