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Center Waveform

1. Automatic Centering

The Automatic centering option converts the first and last data point in a waveform file Data Array to zero. All points in the waveform are then subtracted from a line drawn between the first and last data point in order to obtain a centered (zeroed) baseline. Select automatic centering with the Option – General Preferences – Perform Centering Function when Graph is Loaded. Set automatic centering ON for Pulse-type EODs if the Baseline of the EOD is at 0 V (i.e. equivalent to the zero line). Manual Recentering of chosen sections of the data array can be initiated any time using the command Edit – Move Zero or by clicking the Manual Recenter icon: . Manual recentering can be initiated even if automatic centering is switched on. Set automatic centering OFF for Tone-type EODs in order to prevent artificial rotation of the true Zero Line.

2. Manual Recentering

The manual recentering option allows the user to select the beginning and end of a section of a Data Array for recentering. All points in the waveform are subtracted from the line between the beginning and end of this section to obtain a recentered waveform. If Zero baseline upon recentering is ON: all points outside of the recentered section will be converted to zero (hence eliminating noise). If Zero baseline upon recentering is OFF: all points outside the recentered section will retain their original values.

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