| CPC G01R 31/3171 (2013.01) [G01R 31/31905 (2013.01)] | 6 Claims |
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1. An error rate measurement apparatus that executes a matrix scan function of measuring a bit error rate by transmitting a test signal by a combination of coefficient values in a Full Swing value defined by a PCI Express standard to a device under test during link training, and receiving a measurement target signal returned back from the device under test in response to transmission of the test signal, wherein:
the test signal is based on a parameter value of a cell as a scanning target selected and set from a triangular matrix by the combination of the coefficient values,
three types of coefficient values comprising first, second and third coefficient values are provided in the Full Swing value, and
the error rate measurement apparatus comprises:
a display controller configured to:
display the first coefficient value in a selectable manner by tabs of a number corresponding to the Full Swing value,
perform matrix display on a display screen by using each one of combinations of each of the second coefficient values and each of the third coefficient values in the first coefficient value on the selected tab, as the cell, and
display each coefficient value on the display screen in a three-dimensional bird-eye view by using each second coefficient value and each third coefficient value as a combination of a horizontal direction coordinate axis and a vertical direction coordinate axis, and using the first coefficient value as a depth direction coordinate axis;
an operation display configured to select a range including at least one cell as a scanning target in the matrix display or the bird-eye view display; and a
controller configured to execute the matrix scan function with a parameter value in the range selected by the operation display.
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