:DISPlay:PERSistence
Command Syntax
:DISPlay:PERSistence {MINimum | INFinite | CGRade | GSCale | VARiable}
Query Syntax
:DISPlay:PERSistence?
Description
Sets the type of waveform persistence (sample accumulation). Persistence determines how long a data point is kept on the display before being erased from the display graticule. Persistence is a display memory function, therefore acquired waveforms are written only to display memory. Acquisition memory is where the current waveform data is stored. Therefore, only the last acquired waveform is held in acquisition memory. Display memory is what is seen on the display graticule. The persistence control allows you to view the extremes of a waveform's variation, such as the occurrence of jitter. Setting the persistence to the minimum amount of time allows for easiest viewing of variations in the acquired waveforms. Setting the persistence to the maximum amount of time (infinite) allows for a complete view of everything measured in the waveform. Depending on instrument mode, you can select the type of persistence.
To change the colors used to show color grade persistence, use the :DISPlay:CGSPectrum command. To change the colors used to show color grade persistence, use the :DISPlay:GSSPectrum command.
| Persistence | Oscilloscope | Eye/Mask | Jitter |
|---|---|---|---|
INFinite
|
♦ | ||
CGRade
Color Grade (Infinite) |
♦ | ♦ | ♦ |
GSCale
Gray Scale (Infinite) |
♦ | ♦ | ♦ |
MINimum
|
♦ | ♦ | |
VARiable
|
♦ |