Agilent Technologies DC140 Manuale Utente

•  In the channels list, select a channel from the fastest digitizer (that will make that digitizer the current 

digitizer). 

•  Make sure the maximum number of samples (MAX samples in Memory panel) is large enough. 
•  Select the desired time per division setting (timebase panel): the fastest sampling rate for the current 

digitizer, compatible with the maximum number of samples, will be selected and applied to all digitizers 
in the system. Any digitizer not capable to satisfy that sampling rate will run at its closest setting. 

Finally, note that the sampling rate menu (visible in Transient Recorder mode) contains the sampling rate capability 
of all digitizers currently in use. You must turn off the channels of 'slower' digitizers in order to view the highest 
sampling rates of the 'faster' digitizers. 

Segmented memory enables the sequential acquisition mode . This feature is particularly useful when capturing 
impulse-response type waveforms in a variety of applications. Segmented memory is available in all acquisition 
modes. However, it is generally used in either Normal or Single mode. Waveform display occurs only after all 
segments are filled. Segments can be displayed sequentially on the display or they can be overlaid on top of each 
other. To select an overlaid display, select the item Overlay Segments under the Options menu. Segmented data can 
be archived to any storage device on the computer in a similar way to non-segmented acquisitions. If the acquisition 
needs to be stopped before all segments are filled, press the Stop button. 

In order to set up the sequential acquisition mode, simply select more than 1 segment on 
the segment selection control under the Memory section of the control window and start the 
acquisition.  

A waveform zoom feature is available under the 
View menu of the display window. The screen image 
below shows the normal display and the zoom 
window that appears when zoom is selected. 

The zoom scale and center position are modified 
using the horizontal and vertical controls shown on 
the zoom display window. To the right side of the 
zoom window click on the “Horizontal” button, then 
modify the zoom expansion factor by clicking the 
“In” or “Out” buttons. 

The vertical blue cursor, or box, (depending on the 
zoom factor), shown on the main display window 
indicates the center point and range of the zoom. The 
vertical box or line can be dragged right or left with 
the mouse in order to re-position the center point of 
the waveform displayed in the zoom display window. 
Alternatively, the right and left arrows at the bottom of the zoom display window will reposition the horizontal 
center of the zoom. 

In order to expand the zoom region vertically, select the “Vertical” button on the zoom display and click the “In” / 
“Out” buttons. Alternatively, the up / down arrows on the scale indicator just below the vertical button can be used. 
When the vertical scale is expanded, the top and bottom lines forming the blue box in the main display window show 
the extent of the vertical zoom region. The vertical position of the box, and thus the data region shown on the zoom 
display, may be changed by moving the box vertically with the mouse or by clicking on the up and down arrows at 
the left of the zoom display window. 

When expanding a waveform to the point where individual data points are seen, it may be desirable to use the 
“Connect data points” option under the Options menu in AcqirisLive. When this option is selected, larger data points 
are drawn on the display and a line connects each point.