Abstract: An example system includes a first circuit board having first conductive traces, where a first conductive trace is for conducting an alternating current (AC) digital signal having an edge; a second circuit board having second conductive traces, where a second conductive trace is within a predefined distance of the first conductive trace to produce a contactless coupling with the first conductive trace, and where the contactless coupling enables electrical energy on the first conductive trace to manifest on the second conductive trace as a transient response that is based on the edge; and circuitry to reconstruct the edge based on the transient response from the second conductive trace.

Abstract: An example system includes a first circuit board having first conductive traces, where a first conductive trace is for conducting an alternating current (AC) digital signal having an edge; a second circuit board having second conductive traces, where a second conductive trace is within a predefined distance of the first conductive trace to produce a contactless coupling with the first conductive trace, and where the contactless coupling enables electrical energy on the first conductive trace to manifest on the second conductive trace as a transient response that is based on the edge; and circuitry to reconstruct the edge based on the transient response from the second conductive trace.

Abstract: An example optical receiving device includes a photodiode to receive an optical signal, where the photodiode is configured to conduct a current that is based on an optical power of the optical signal, and a radio frequency (RF) gain circuitry to generate one or more analog electrical signals based on the current and based on gain provided by the RF gain circuitry. A power detector is configured to receive an analog electrical signal of the one or more analog electrical signals, to detect alternating current (AC) power of the optical signal based on the analog electrical signal, and to output a signal representing the AC power based on the detecting.

Abstract: An example optical receiving device includes a photodiode to receive an optical signal, where the photodiode is configured to conduct a current that is based on an optical power of the optical signal, and a radio frequency (RF) gain circuitry to generate one or more analog electrical signals based on the current and based on gain provided by the RF gain circuitry. A power detector is configured to receive an analog electrical signal of the one or more analog electrical signals, to detect alternating current (AC) power of the optical signal based on the analog electrical signal, and to output a signal representing the AC power based on the detecting.

Abstract: An example system includes non-transitory machine-readable storage storing calibration data sets. A calibration data set includes parameter values that vary non-linearly. Each of the calibration data sets is temperature-specific. The example system also includes channels over which signals pass to and from units under test (UUTs). A channel includes input circuitry to receive a signal of the signals and to obtain a first parameter based on the signal; and correction circuitry to obtain a second parameter based on the first parameter and based on the calibration data set. The second parameter includes a calibrated version of the first parameter. The calibration data set is selectable based on temperature.

Abstract: An example process for aligning channels in automatic test equipment (ATE) includes programming a first delay associated with receiving first data over a channel so that timing of the channel is aligned to timings of other channels in the ATE; programming a second delay associated with a driver driving second data over the channel based on receipt of an edge of the second data so that timing of the second data is aligned to the timing of the channel; and programming a third delay associated with a signal to enable the driver to drive the second data over the channel, with the third delay being programmed to align timing of the signal to the timing of the channel, and with the third delay being based on an edge that corresponds to an edge of the signal created by controlling operation of the driver.

Abstract: An example system includes capture circuitry to obtain first parametric data based on a first signal at an interface to a first communication channel, with the first parametric data representing non-informational content of the first signal; and control circuitry to receive the first parametric data and to provide second parametric data, the second parametric data being based on one or both of: the first parametric data or a programmatic input. The example system also includes interface circuitry to receive the second parametric data and to receive informational content data representing informational content, and to process the informational content data and the second parametric data to produce a second signal. The second signal has the informational content represented by the informational content data and having at least some non-informational content based on the second parametric data.

Abstract: Example pin electronics includes driver circuitry to output a first optical signal to a UUT. The first optical signal is based on a first signal representing first informational content and one or more second signal representing first parametric information. Receiver circuitry receives a second optical signal from the UUT. The second optical signal is related to a third signal representing second informational content and one or more fourth signal representing second parametric information. Comparison circuitry obtains parametric data representing at least one of the first parametric information or the second parametric information, and compares, based on the parametric data, the at least one of the first parametric information or the second parametric information to one or more thresholds. Control circuitry adjusts at least some of the first parametric information prior to output of the first optical signal, and one or more of the thresholds.

Abstract: An example system includes circuitry to receive an input signal, to provide a related signal based on informational content of the input signal, and to obtain parametric data associated with the input signal. The parametric data represents one or more signal characteristics other than the informational content. The example system also includes a first switch that is configurable to provide first data based on the related signal to one or more first channels of the system; and a second switch that is configurable to provide second data based on the parametric data to one or more second channels of the system.

Abstract: An example system includes input circuitry configured to obtain first data corresponding to first signals on a communication channel, with the first data having a first frequency that is less than a predefined frequency; and sampling circuitry configured to sample the first data to produce second data having a second frequency that is greater than or equal to the predefined frequency. The example system also includes switching circuitry configured to support AC-coupled data having a frequency that is greater than or equal to the predefined frequency, with the switching circuitry being configured to receive the second data and to forward the second data; and output circuitry to receive the second data and parametric data representing non-information signal content, to produce third data based on the second data, and to produce, based on the third data and the parametric data, second signals for output from the system.

Abstract: An example process for aligning channels in automatic test equipment (ATE) includes programming a first delay associated with receiving first data over a channel so that timing of the channel is aligned to timings of other channels in the ATE; programming a second delay associated with a driver driving second data over the channel based on receipt of an edge of the second data so that timing of the second data is aligned to the timing of the channel; and programming a third delay associated with a signal to enable the driver to drive the second data over the channel, with the third delay being programmed to align timing of the signal to the timing of the channel, and with the third delay being based on an edge that corresponds to an edge of the signal created by controlling operation of the driver.

Abstract: An example system includes circuitry to receive an input signal, to provide a related signal based on informational content of the input signal, and to obtain parametric data associated with the input signal. The parametric data represents one or more signal characteristics other than the informational content. The example system also includes a first switch that is configurable to provide first data based on the related signal to one or more first channels of the system; and a second switch that is configurable to provide second data based on the parametric data to one or more second channels of the system.

Abstract: An example system includes non-transitory machine-readable storage storing calibration data sets. A calibration data set includes parameter values that vary non-linearly. Each of the calibration data sets is temperature-specific. The example system also includes channels over which signals pass to and from units under test (UUTs). A channel includes input circuitry to receive a signal of the signals and to obtain a first parameter based on the signal; and correction circuitry to obtain a second parameter based on the first parameter and based on the calibration data set. The second parameter includes a calibrated version of the first parameter. The calibration data set is selectable based on temperature.

Abstract: An example system includes capture circuitry to obtain first parametric data based on a first signal at an interface to a first communication channel, with the first parametric data representing non-informational content of the first signal; and control circuitry to receive the first parametric data and to provide second parametric data, the second parametric data being based on one or both of: the first parametric data or a programmatic input. The example system also includes interface circuitry to receive the second parametric data and to receive informational content data representing informational content, and to process the informational content data and the second parametric data to produce a second signal. The second signal has the informational content represented by the informational content data and having at least some non-informational content based on the second parametric data.

Abstract: Example pin electronics includes driver circuitry to output a first optical signal to a UUT. The first optical signal is based on a first signal representing first informational content and one or more second signal representing first parametric information. Receiver circuitry receives a second optical signal from the UUT. The second optical signal is related to a third signal representing second informational content and one or more fourth signal representing second parametric information. Comparison circuitry obtains parametric data representing at least one of the first parametric information or the second parametric information, and compares, based on the parametric data, the at least one of the first parametric information or the second parametric information to one or more thresholds. Control circuitry adjusts at least some of the first parametric information prior to output of the first optical signal, and one or more of the thresholds.

Abstract: An example system includes input circuitry configured to obtain first data corresponding to first signals on a communication channel, with the first data having a first frequency that is less than a predefined frequency; and sampling circuitry configured to sample the first data to produce second data having a second frequency that is greater than or equal to the predefined frequency. The example system also includes switching circuitry configured to support AC-coupled data having a frequency that is greater than or equal to the predefined frequency, with the switching circuitry being configured to receive the second data and to forward the second data; and output circuitry to receive the second data and parametric data representing non-information signal content, to produce third data based on the second data, and to produce, based on the third data and the parametric data, second signals for output from the system.

Abstract: A single ended to a differential signal converter. The single ended signal is passed through a high pass filter to block DC components. A positive and a negative version of the filtered signal are used collectively as the differential output of the converter. To allow accurate measurements on the input signal without waiting for the output of the high pass filter to settle, the differential outputs are offset by a dynamically generated signal representative of the midpoint of the filtered signal. That offset is generated by capturing a value representing the midpoint when a signal is first applied. This captured value is allowed to change with a time constant matching a time constant of the high pass filter. The converter may be used to connect a test instrument to a unit under test that generates test signals in a format that the test instrument is not specifically configured to measure.

Abstract: Techniques for obtaining a propagation delay through first and second transmission lines having substantially equal propagation delays may include: providing a first signal to the first transmission line; providing a second signal to the second transmission line; detecting an incident edge of the first signal on the first transmission line; detecting a reflected edge of the second signal on the second transmission line; and determining the propagation delay based on times of detection of the incident edge and detection of the reflected edge.

Abstract: A single ended to a differential signal converter. The single ended signal is passed through a high pass filter to block DC components. A positive and a negative version of the filtered signal are used collectively as the differential output of the converter. To allow accurate measurements on the input signal without waiting for the output of the high pass filter to settle, the differential outputs are offset by a dynamically generated signal representative of the midpoint of the filtered signal. That offset is generated by capturing a value representing the midpoint when a signal is first applied. This captured value is allowed to change with a time constant matching a time constant of the high pass filter. The converter may be used to connect a test instrument to a unit under test that generates test signals in a format that the test instrument is not specifically configured to measure.

Abstract: Techniques for obtaining a propagation delay through first and second transmission lines having substantially equal propagation delays may include: providing a first signal to the first transmission line; providing a second signal to the second transmission line; detecting an incident edge of the first signal on the first transmission line; detecting a reflected edge of the second signal on the second transmission line; and determining the propagation delay based on times of detection of the incident edge and detection of the reflected edge.