Selective display of waveforms governed by measured parameters

Patent metadata

Field	Value
Publication number	US-9443490-B2
Application number	US-201213538978-A
Country	US
Kind code	B2
Filing date	Jun 29, 2012
Priority date	Jun 29, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

Disclosed is a test and measurement instrument that includes a signal input structured to receive a modulated radio frequency (RF) signal under test and a demodulator structured to extract a digital signal from the received modulated RF signal. The extracted digital signal has a measurable parameter. The instrument also includes a display controller structured to display the extracted demodulated signal at one of at least two different intensities based on the measured parameter of the digital signal. In other embodiments the signal need not be an RF signal. Methods of operation are also described.

First claim

What is claimed is:

1. A test and measurement instrument, comprising:
a signal input structured to receive a modulated radio frequency (RF) signal under test;
a demodulator structured to extract a digital signal from the received modulated RF signal, the digital signal having a measurable parameter; and
a display controller structured to display the extracted demodulated signal at one of at least two different intensities based on the measured parameter of the digital signal in which the digital signal carried by the modulated RF signal is a burst-mode data signal, in which the display controller is structured to display the extracted demodulated signal at a high intensity when the burst-mode is active, and is structured to display the extracted demodulated signal at a low intensity when the burst-mode is inactive.

2. The test and measurement instrument of claim 1 , in which the demodulator is one of a phase modulator and a frequency modulator.

3. The test and measurement instrument of claim 1 , in which measurable parameter of the digital signal is amplitude, and in which the display controller is further structured to display the extracted demodulated signal at an intensity level based on the amplitude of the extracted demodulated signal.

4. The test and measurement instrument of claim 1 , in which measurable parameter of the digital signal is power, and in which the display controller is further structured to display the extracted demodulated signal at an intensity level based on the power of the extracted demodulated signal.

5. The test and measurement instrument of claim 1 , in which measurable parameter of the digital signal is magnitude, and in which the display controller is further structured to display the extracted demodulated signal at an intensity level based on the magnitude of the extracted demodulated signal.

6. The test and measurement instrument of claim 1 , in which the intensity at which the demodulated signal is displayed is zero when the measurable parameter is below a threshold.

7. The test and measurement instrument of claim 6 , in which the display controller is structured to display the extracted demodulated signal at a full intensity level when the amplitude of the demodulated signal is above the threshold.

8. The test and measurement instrument of claim 1 in which the display controller is structured to display the extracted demodulated signal at a varying intensity level when the amplitude of the demodulated signal is between a first measured parameter and a second measured parameter.

9. The test and measurement instrument of claim 1 , further comprising:
a memory for storing data retrieved from the extracted demodulated signal.

10. The test and measurement instrument of claim 9 in which the data in the memory is indicated as not containing valid data when the measured parameter of the demodulated signal is below a threshold.

11. A test and measurement instrument, comprising:
a signal input structured to receive a modulated signal to be evaluated;
a demodulator structured to extract a time-dependent signal from the modulated signal to be evaluated, the time-dependent signal having a measurable parameter; and a display controller structured to display the time-dependent signal at one of at least two different intensities based on the measured parameter of the time-dependent signal, in which the time-dependent signal carried by the modulated signal is a burst-mode data signal, in which the display controller is structured to display the extracted demodulated signal at a high intensity when the burst-mode is active, and is structured to display the extracted demodulated signal at a low intensity when the burst-mode is inactive.

12. The test and measurement instrument of claim 11 , in which measurable parameter of the time-dependent signal is amplitude, and in which the display controller is further structured to display the extracted time-dependent signal at an intensity level based on the amplitude of the extracted time-dependent signal.

13. The test and measurement instrument of claim 11 , in which measurable parameter of the time-dependent signal is power, and in which the display controller is further structured to display the extracted time-dependent signal at an intensity level based on the power of the extracted time-dependent signal.

14. The test and measurement instrument of claim 11 , in which measurable parameter of the time-dependent signal is magnitude, and in which the display controller is further structured to display the extracted time-dependent signal at an intensity level based on the magnitude of the extracted time-dependent signal.

15. A method in a test and measurement device, the method comprising:
receiving a modulated input signal at the test and measurement device;
demodulating the modulated input signal during a burst mode to extract a time-dependent data signal;
determining a parameter of the time-dependent data signal; and
selectively displaying the time-dependent data signal one of two or more intensity levels dependent on the determined parameter level, in which the time-dependent data signal is displayed at a first intensity when the burst-mode is active, and is displayed at a second intensity when the burst-mode is inactive, the first intensity different than the second intensity.

16. The method of claim 15 in which the test and measurement device further comprises a memory for storing data, the method further comprising:
indicating that data in the memory is invalid when the parameter level is below a threshold level.

17. The method of claim 15 in which the demodulated data suppressed from being displayed when the parameter level of the time-dependent data signal is below a threshold level.

Assignees

• Ward Benjamin A
• Dobyns Kenneth P
• Waldo Gary J
• Tektronix Inc

Inventors

• Ward Benjamin A
• Dobyns Kenneth P
• Waldo Gary J

Classifications

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G5/00 Primary

  Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) · CPC title

• G09G5/10 Primary

  Intensity circuits · CPC title