User manual

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7.4.2

Persistence Options dialog

This dialog appears when you click the Persistence Options button in the

Capture Setup toolbar. It is available only when persistence mode is selected. It

controls the colors and fading algorithm used to distinguish new or frequent data from

old or intermittent data in the persistence view.

Mode

Digital Color. This mode uses a range of colors to indicate the

frequency of waveform data. Red is used for the most frequent data,

and less frequent data is represented successively by yellow and blue.

Analog Intensity. This mode uses color intensity to indicate the age of

waveform data. The latest data is drawn at full intensity in the selected

color for that channel, with older data being represented by paler

shades of the same color.

Advanced. This mode opens up a Custom Options section at the

bottom of the dialog that let you customise the persistence mode

display.

Decay Time

The time, in milliseconds, taken for waveform data to fade from

maximum intensity to minimum intensity or from red to blue. The

longer the decay time, the longer the older waveforms will remain on

the screen.

Saturation

The intensity or color with which new waveforms are drawn.

Decayed

Intensity

The intensity or color to which the oldest waveforms decay when the

decay time expires. If the decayed intensity is zero, then older

waveforms will be completely erased from the display after the decay

time. For non-zero values of decayed intensity, old waveforms will

remain indefinitely on the screen at that intensity unless overwritten by

new ones.