Macros: Zero, ZeroDlg

This toolbar button (or ALT+Z) toggles the current waveform zero function. There are 3 possible functions, depending on the mode set via the Zero Mode control dialog.

The functions affect the vertical positions of waveforms on the screen; they have no effect (and are disabled) in Spectrum or Spectrogram ( Sgram) modes, as well as Histogram and PSTH modes of the Waveform Averager.

The Zero button includes a two-letter abbreviation of the current mode. The default mode is Zero Cursor, which is shown as 'Zero Cr'. This centers the waveform vertically about the location under the solid cursor.

To change modes, click the thin button below Zero, or hit CTRL+Z to display the Zero Mode dialog:

• Zero Toggle (duplicate)
• Zero Cursor
• Zero Average
• Zero Peak

The top button in the dialog is simply a duplicate of the toolbar Zero button (in case the dialog happens to be covering it at the moment).

Below that are the 3 Zero Mode select buttons, with the current mode shown depressed. When you select a mode, the toggle buttons (toolbar and duplicate) change to show the new mode.

Note that for Triggered operation, the Trigger Level threshold and Hysteresis are applied prior to any Zero adjustment of the waveform. You thus may want to toggle Zero off while adjusting the trigger.

Macro Notes:

Zero=1 activates the current Zero mode, Zero=0 turns it off, and Zero=x toggles between on and off.

Note that Zero is disabled in Spectrum and Histogram modes. Attempts to change it will result in the macro being aborted with an error message.

ZeroDlg=1 opens the Zero control dialog, ZeroDlg=0 closes it, and ZeroDlg=x toggles between open and closed.

Note that the dialog does not need to be opened to change Zero modes directly via ZeroMode commands.

• Back to Trace Update Interval
• Ahead to Zero Cursor (Zero Cr) Mode
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