Macros: XpandMax, XpandMin

Max and Min set the X-axis upper and lower limits, respectively, that will be shown when eXpand (or the toolbar X-Axis button or ALT+X) is active.

These values may be set manually from this dialog, even when eXpand is off.

They may also be forced to match the current cursor positions via ALT+CTRL+X (which will force eXpand on), even if the X-Axis dialog is not visible.

They may be scrolled by the horizontal arrow buttons at the left and right ends of the X axis, again even if the X-Axis dialog is not visible. This will also force eXpand on.

They may be changed by dragging the X axis with the mouse, as noted under X-Axis eXpand, again forcing eXpand on, regardless of whether the X-Axis dialog is visible.

There are separate Max and Min limits for waveform, Histogram, and Spectrum modes, as well as for X-Log Spectrum. The units to the right of these controls change as appropriate for the current X axis.

Spectrogram ( Sgram) eXpand also uses these same limits, but here they refer to the Y axis, which may also be dragged to force Sgram eXpand on and change the limits. (The same little horizontal arrow buttons at either end of the X axis will also work to adjust the Y axis of the Sgram.)

Macro Notes:

Note that the units used for setting Max and Min are determined by the current mode: seconds for waveform mode, Volts (or User Units, if active) for Histogram mode, or Hertz for linear or X-log Spectrum modes. Be sure to set the desired mode before you use either of these commands.

XpandMax=10m will set the Max limit to 10 msec in waveform mode. In Histogram mode this will set 10 mV or 0.010 User Units. In Spectrum modes it will attempt to set 0.010 Hertz. XpandMin works similarly.

Alternatively, XpandMax=>1 will increment and XpandMax=>-1 will decrement the current setting by one step. In waveform mode the step size is the reciprocal of the sample rate, or about 21 microseconds at 48000 Hertz. In Histogram mode, it is 1/256 of the full-scale range. In Spectrum modes it is one spectral line, or about 47 Hertz at 48000 Hz sample rate.

See also X-Axis Control Dialog

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