Test Equipment Calibration
First Claim
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1. A method of calibrating test equipment, the method comprising:
- aligning timing of a first group of channels in the test equipment;
aligning timing of a second group of channels in the test equipment, the second group of channels being different from the first group of channels;
determining a misalignment in timing between a first channel and a second channel, the first channel being from the first group of channels, and the second channel being from the second group of channels; and
compensating, for the misalignment, channels in at least one of the first group or the second group.
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Abstract
Calibrating test equipment may include: aligning timing of a first group of channels in the test equipment; aligning timing of a second group of channels in the test equipment, with the second group of channels being different from the first group of channels; determining a misalignment in timing between a first channel and a second channel, with the first channel being from the first group of channels, and the second channel being from the second group of channels; and compensating, for the misalignment, channels in at least one of the first group or the second group.
14 Citations
21 Claims
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1. A method of calibrating test equipment, the method comprising:
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aligning timing of a first group of channels in the test equipment; aligning timing of a second group of channels in the test equipment, the second group of channels being different from the first group of channels; determining a misalignment in timing between a first channel and a second channel, the first channel being from the first group of channels, and the second channel being from the second group of channels; and compensating, for the misalignment, channels in at least one of the first group or the second group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for calibrating channels, the system comprising:
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a device interface board (DIB) comprising (i) interfaces to corresponding channels of a test instrument, and (ii) circuit paths that run between the interfaces and shorting points, the circuit paths to electrically connect a first group of channels to a first shorting point and to electrically connect a second group of channels to a second shorting point, the second group of channels being different from the first group of channels; an apparatus for use in determining a misalignment in timing between a first channel and a second channel, the first channel being from the first group of channels, and the second channel being from the second group of channels; and a computing device programmed to (i) align timing of the first group of channels in the test equipment, (ii) align timing the second group of channels in the test equipment, and (iii) compensate, for the misalignment, channels in at least one of the first group or the second group. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for calibrating channels, each of the channels having a driver delay and a comparator delay, the method comprising:
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organizing the channels into groups of channels, each group being electrically connected to a shorting point; for each group of channels; enabling a number of channels while disabling a remainder of the channels; measuring, at the disabled channels, timing of a composite signal composed of the enabled channels; generating a system of equations in which, for each disabled channel, a comparator time is equated to an average of a driver time for all enabled channels; solving the system of equations to obtain, for each channel, the driver delay and the comparator delay; and calibrating the channels in each group using the driver delay and the comparator delay; selecting a channel from each group; aligning the selected channels; and aligning all channels in a group based on alignment of the selected channels. - View Dependent Claims (17, 18, 19)
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20. An apparatus for calibrating test equipment, the apparatus comprising:
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first means for (i) aligning timing of a first group of channels in the test equipment, and (ii) aligning timing of a second group of channels in the test equipment, the second group of channels being different from the first group of channels; and second means for determining a misalignment in timing between a first channel and a second channel, the first channel being from the first group of channels, and the second channel being from the second group of channels; wherein the first means is also for compensating, for the misalignment, channels in at least one of the first group or the second group.
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21. One or more non-transitory machine-readable storage media storing instructions that are executable to calibrate channels that are organized into groups of channels, each group being electrically connected to a shorting point, the instructions being executable by one or more processing devices to perform operations comprising:
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for each group of channels; generating a system of equations in which, for each disabled channel, a comparator time is equated to an average of a driver time for all enabled channels; solving the system of equations to obtain, for each channel, the driver delay and the comparator delay; and calibrating the channels in each group using the driver delay and the comparator delay; selecting a channel from each group; and aligning all channels in a group based on an alignment of the selected channels.
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Specification