DI-770 Oscilloscope provides five virtual instruments in one

DI-770 and WINDAQ/Scope Manual
• Clicking the Play button ( ).
• Pressing the key
• Enter the Measure menu and select the Start measuring item
When the measurement is started, all controls except the Stop controls are disabled.
Stop measuring
When the predefined number of samples is reached, the data logger will stop measuring. It is also possible to stop the
data logger manually, e.g. when the event to measure is measured, or the instrument settings are wrong (coupling,
sensitivity etc.). This can be done in three ways:
• Clicking the Stop button ( )
• Pressing the key
• Enter the Measure menu and select the Stop measuring item
When the measurement is stopped, all controls are enabled again.
Scroll mode
While measuring, the data logger displays the measured signal on a 1:1 base, meaning that for each sample 1 display
pixel is used. When the number of measured samples is larger than the available number of pixels in the display, the
record view offset has to be changed in such a way that the latest samples will be visible.
There are two ways to do this:
Scan mode: When the display is full, the record view offset will change a full screen, so the new samples will start
filling the display from the left hand side of the display again.
Roll mode: When the display is full, the record view offset will change with one sample, making space for one new
sample. Each new sample causes a change in the record view offset.
Roll mode looks nicer than Scan mode, but is also slower, so the data logger will sooner miss samples in Roll mode
than in Scan mode.
To set the scroll mode, enter the Measure menu, select the item Scroll mode and choose between the two possibilities.
Comparing signals using the reference channels
To make the data logger keep up with the measuring hardware longer, references can be switched off while measuring.
To do this, open the References menu and select the Show references while measuring item.
When the item Show references while measuring is checked, switched on references are shown while the data logger
measures. If the item is not checked, the references are switched off when the measurement is started and switched on
again when the data logger is ready.
Performing cursor measurements
Like in the oscilloscope, the data logger has a set of cursors to perform measurements on the displayed signals.
The cursors in the data logger work exactly like the oscilloscope, so refer to chapter 2, the oscilloscope, for an explanation
on how to work with the cursors.
The Data Logger
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