DMT Presenter Control Manual de usuario descargar pdf (Pagina 31)

3.3.3.1 Selecting Data for Display

The data control bar can be used to display up to six parameters in the interface.

These can be selected from the list box menus. Control parameters of the myograph

(e.g. pressures) or derived parameters (e.g. lumen diameter) can be displayed. The

display has an internal memory of several hours where parameters are stored even

if they are not displayed. The memory can be used to review the parameter history at

any time but should not be confused with the logging of parameters to le, which is a

separate feature of VediView

™

3.3.3.2 Conguration of Data Display

The display of parameters in VediView



can

be congured in the “congure graph window”

selected from the pop-up menu in the data

control bar. In the congure graph window

shown in Fig. 3.15, it is possible to congure

the axis range of each displayed parameter,

the data rate and the time range. Once an

appropriate graphical display setup has been

entered, click the "OK" bottom to complete the

selection.

Since up to six parameters can be displayed at the time, the y-axis label must

be chosen to suit the congured parameters. This is achieved by selecting the

appropriate radio button adjacent to the parameter list box in the data control bar.

3.3.3.3 Control of Data Display

The graphical display of parameters has a specied data length (default 60 seconds)

but very often an experiment may last considerably longer. VediView



provides a

facility to scroll back through the display using the "slider" button on the control

bar. Having activated the scroll function, subsequent graphical display is paused. By

selecting the “resume” button , the display will reset to the current time (i.e. time

0). During data scrolling, real time data is still passed on to the internal memory for it

to be reviewed subsequently. Note that the internal memory is only used for the

graphical display. If the user wishes to log data for future reference or export to

spreadsheet, then the data logging facility must be activated. The displayed data

history may be reset at any time using the “clear data history” item on the pop-up

menu. Note that this command does not affect data that has been logged to disk.

3.3.3.4 Data Logging

Data les (*.ved) can be created from the data control bar, which contains a log of all

the controlled or derived parameters. The logged les contain all possible parameters

in a standard spreadsheet format where each column corresponds to a parameter.

If a given parameter is not calculated or used, it will still appear in the spreadsheet.

This feature protects the user from forgetting to log a parameter that may be required.

The log les are text based and may be read and displayed by VediView



or any

standard spreadsheet application (e.g. EXCEL).

Figure 3.15 Congure graph window

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