Data Zero Manual Adjust

Controls: Zero Dialog >> Manual >> Adjust
Macros: LI.ZeroAdj, RI.ZeroAdj, etc.

When Data Zero Manual mode is active, the Adjust controls allow you to set any arbitrary value as the effective zero position for waveform data.

The units will be in percent of full scale, or in volts (or User Units), depending on the state of the Units button on the right. You can toggle Units at any time.

Usually, you will want to use the adjacent Null controls to automatically set the Adjust value to the current average input value (after first applying an effective zero condition). But a manual adjustment can be handy for special circumstances, and is especially useful for "what if" studies of Histogram and PSTH averages.

Macro Notes:

LI.ZeroAdj=10 sets the Left Input channel Manual Adjust value to 10% of the full-scale range, assuming the Zero Units button is off.

If Units is active, this same command attempts to set it to 10 volts (or 10 User Units), limiting the value to the actual full-scale range as needed. You can use LI.ZeroAdj=10m to set 10 mV (or 10 milli-units for User Units).

Similarly, RI.ZeroAdj sets the Right Input, LO.ZeroAdj sets the Left Output, and RO.ZeroAdj sets the Right Output.

Alternatively, you can use the Ch. prefix to set a channel previously specified via the Ch Channel Select command.

Note that attempts to use these commands when the controls are disabled in Spectrum, Spectrogram, or Pitch Track modes will result in "Control disabled. Aborting macro." You can check if this control is enabled via an E.IF.ZeroAdj= control enable IF test. You don't need to specify the channel, since all are enabled or disabled together.

See also Zero (Cursor, Average, Peak, or Manual)