DI-770 Oscilloscope provides five virtual instruments in one

DI-770 and WINDAQ/Scope Manual
In the above picture, the trigger mode of the left hand symbol is set to Rising slope and the trigger mode of the right
hand symbol is set to Falling slope.
To adjust the trigger level using the trigger symbol, place the mouse pointer on the trigger symbol, in the area that is
marked adjust trigger level in the above picture. The mouse pointer will change to a symbol. Press the left mouse
button and drag the trigger symbol to the correct position, while keeping the left mouse button pressed. While dragging,
the trigger level is adjusted according the position of the trigger symbol on the screen. When the mouse button
is released, trigger level adjustment stops and the normal mouse pointer shape is returned.
To adjust the trigger hysteresis using the trigger symbol, place the mouse pointer on the trigger symbol, in the area
that is marked adjust trigger hysteresis in the above picture. The mouse pointer will change to a symbol. Press
the left mouse button and drag the hysteresis level of the trigger symbol to the correct position, while keeping the left
mouse button pressed. While dragging, the trigger hysteresis is adjusted according the size of the trigger symbol.
When the mouse button is released, trigger hysteresis adjustment stops and the normal mouse pointer shape is
returned.
To adjust the trigger mode using the trigger symbol, place the mouse pointer on the trigger symbol and double click
the left mouse button. The trigger mode will change from:
Falling slope to Rising slope
Rising slope to Falling slope
The trigger time out
When the input signal does not meet the trigger conditions, no new measurement data will be displayed and the last
displayed signal will remain on the screen. This can be very inconvenient with unknown signals, since it is not known
how the trigger system has to be set. To provide in that case for a representation of the input signal on the screen, a
trigger time out setting is available.
With the time out setting it is determined how long the delay will be for a trigger pulse. If that time expires, a trigger
pulse is forced by the software and the available data will be displayed. This will not result in a stable display, but it
will give an impression how the trigger has to be set.
To set the trigger time out, enter the Trigger menu and select the Time out ... item. An input dialog will come up in
which the time out time can be entered, in seconds.
When a time of zero is entered, there will be no trigger time out, but no triggering as well. As soon as a signal is displayed,
the instrument will be set up for a new measurement and immediately a trigger pulse is generated, without
waiting for a trigger. This can be useful when e.g. a slowly changing DC level has to be monitored, on which can't be
triggered.
In the dialog also a check box for an infinite time out is available. When this box is checked, the software will keep
waiting for the input signal to meet the trigger settings, without ever forcing a trigger pulse. This can be very useful in
one shot measurements and with auto disk measuring.
Performing measurements
When the oscilloscope is completely set up, measurements can be performed.
By default the oscilloscope is always measuring and displaying. Changes that are made in the settings can be made
while measuring and will be executed while measuring, so the effects are immediately visible.
Stopping the measurements
To avoid a new screen of measurement data replacing an old screen, measuring and displaying of data can be stopped.
This can be done in several ways: by pressing the Pause button (
item Stop continuous measuring from the Measure menu.
), by pressing the key or by activating the
The Oscilloscope
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