Transmitter equalizer tap extraction
AssigneeTektronix, Inc.
InventorKan Tan
Life of this patent
Estimating the term…
Abstract
A test and measurement instrument has one or more input ports to connect the instrument to a device under test (DUT), one or more processors configured to execute code to cause the one or more processors to: receive an equalized waveform and an un-equalized waveform through the input port from the DUT, without any knowledge of a digital pattern that corresponds to the waveforms and without extracting the digital pattern from the waveforms, align the un-equalized waveform and the equalized waveform in time to produce an aligned un-equalized waveform and an aligned equalized waveform, and use the aligned equalized waveform and the aligned un-equalized waveform to determine equalizer tap values.
Claims20
A test and measurement instrument, comprising:
- one or more input ports to connect the instrument to a device under test (DUT);
- one or more processors configured to execute code to cause the one or more processors to:
- receive an equalized waveform and an un-equalized waveform through the input port from the DUT, without any knowledge of a digital pattern that corresponds to the waveforms and without extracting the digital pattern from the waveforms;
- align the un-equalized waveform and the equalized waveform in time to produce an aligned un-equalized waveform and an aligned equalized waveform;
- and
- use the aligned equalized waveform and the aligned un-equalized waveform to determine equalizer tap values.
A method of determining equalizer tap values, comprising:
- receiving an equalized waveform and an un-equalized waveform through one or more input ports from a device under test (DUT), without any knowledge of a digital pattern that corresponds to the waveforms and without extracting the digital pattern from the waveforms;
- aligning the un-equalized waveform and the equalized waveform in time to produce an aligned un-equalized waveform and an aligned equalized waveform;
- and
- using the aligned equalized waveform and the aligned un-equalized waveform to determine equalizer tap values.
Dependencies are inferred from the claim text.