Patent ID: 8218611
Filing Date: 2012-07-10
Classification: G01R

Abstract:
1. A signal generating device comprising: a display; a central processing unit generating a user interface on the display for setting parameters of a serial data pattern, selecting an S-parameter file representing a measured signal path and an intersymbol interference scaling value for scaling magnitude values in the S-parameter file wherein magnitude responses for each of a given set of frequencies of the S-parameter file are converted to linear magnitude responses with the minimum linear magnitude response of the linear magnitude responses subtracted from the other linear magnitude responses and the resulting linear magnitude responses multiplied by the intersymbol interference scaling value with the linear minimum magnitude response added to each of the resulting linear magnitude responses multiplied by the intersymbol interference scaling value and the resulting linear magnitude responses multiplied by the intersymbol interference scaling value divided by the maximum linear magnitude response of the linear magnitude responses and a waveform record file is generated using the serial data pattern parameters and the S-parameter file modified by the intersymbol interference scaling value; and a waveform generation circuit receiving the waveform record file and generating a serial data pattern analog output signal modified by the S-parameter file having magnitude values scaled by the intersymbol interference scaling value.