Multi-channel signal synchronization method and tester

Abstract

The application relates to a multi-channel signal synchronization method and a testing machine, which comprises the following steps: according to the buffer area state detected by a buffer unit in a transmitting module of each board card in an integral period, performing forward phase interpolation processing on a clock signal generated by a phase-locked loop module until data detected by the buffer unit in continuous preset integral periods reaches a preset capacity, recording an accumulated interpolation step A; according to the buffer area state detected by the buffer unit in the integral period, performing reverse phase interpolation processing on the clock signal generated by the phase-locked loop module, and recording an accumulated interpolation step B of the reverse phase interpolation; continuously performing the reverse phase interpolation processing on the clock signal generated by the phase-locked loop module, stopping the interpolation after adjusting to a target phase interpolation, the target phase interpolation is calculated according to the accumulated interpolation step A and the accumulated interpolation step B, the signal synchronization of the multi-channels of the board cards is completed, and the test accuracy is improved.

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