User manual

Operator's Manual

Persistence

The Persistence feature retains waveform traces on the display for a set amount of time before allowing

them to gradually "decay," similar to the display of old phosphor screen oscilloscopes. Use Persistence to

accumulate on-screen points from many acquisitions to see your signal change over time. The persistence

modes show the most frequent signal path in three-dimensional intensities of the same color (Analog), or

graded in a spectrum of colors (Color). You can show persistence for any channel, math function, or memory.

Access the Persistence dialog by choosing Display > Persistence Setup. Check Persistence On to shown

persistence, then select the mode, saturation level, persistence time, and last trace display.

Persistence Mode

The Persistence display is generated by repeated sampling of the amplitudes of events over time, and the

accumulation of the sampled data into display maps. These maps create an analog-style display. Statistical

integrity is preserved because the duration (decay) is proportional to the persistence population for each

amplitude or time combination in the data.

In Analog Mode, as a persistence data map develops, different intensities of the

same color are assigned to the range between a minimum and a maximum

population. The maximum population automatically gets the highest intensity, the

minimum population gets the lowest intensity, and intermediate populations get

intensities in between these extremes. The information in the lower populations (for

example, down at the noise level) could be of greater interest to you than the rest. The Analog persistence

view highlights the distribution of data so that you can examine it in detail.

Color Mode persistence works on the same principle as Analog persistence, but

instead uses the entire color spectrum to map signal intensity: violet for minimum

population, red for maximum population. In this mode, all traces use all colors, which

is helpful for comparing amplitudes by seeking like colors among the traces.