What do Measurements do?

Measurements must be used with a multi-section analysis and are enabled through Performance Analysis in the Probe window. Measurements return a single value for a waveform. Measurements are defined with a name, a marked point expression and a search command. The marked point expression calculates a single point based on the X and Y co-ordinates of one, or more points on a curve (waveform). The search commands are instructions for finding a point on a curve that meets specific criteria.

The generic search syntax is:

search [direction] [/start_point/] [#consecutive_points#]
[(range_x [,range_y])] [for] [repeat:] <condition>

Optional parameters are between square brackets so: “search”, optional “direction, optional “start point”, optional “number of consecutive points”, optional “x range” (and optional “y range”), optional “for”, optional “repeat”, and a condition.

An example to find the rise time:

RISETIME(1) = x2 – x1
{
1|search forward level (10%,p)!1
search forward level (90%,p)!2;
}

Rise time takes a single argument, the waveform, and calculates the difference between two x values, the first found by searching the waveform for 10% positive going and the second found by searching the waveform for 90% positive going.

Plot Window Templates

Plot Window Templates allow the “state” of the Probe window display to be saved and recalled, they can also be assigned to custom Markers that can be placed in the schematic.

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