User manual

DVP and EMU2 (HDS2) emulator features UM0036
256/385 Doc ID 7705 Rev 11
an external measurement instrument, such as an oscilloscope. When a user-defined
hardware event occurs, an impulse (TTL level) is emitted or the level of the signal is
changed, depending on the type of hardware event.
For information on how to define hardware events, see Section 8.2: Using hardware events
on page 237.
Controlling the output trigger on the DVP2 and DVP3
There are three types of hardware events for the DVP2 and DVP3 and they have the
following effect on the trigger signal:
● EVT_ON hardware events make the TRIGOUT signal rise from 0 to 1,
● EVT_OFF hardware events make the TRIGOUT signal fall from 1 to 0,
● EVT_HIT hardware events cause a signal pulse to be emitted. The pulse consists of a
positive signal rise from 0 to 1 for the duration of one cycle, after which, the signal falls
to 0.
If you only want your hardware events to affect the output triggers, in the Trigger/Trace
Settings window, click on the Trace filtering disable option as shown in Figure 193.
Figure 193. Trigger/Trace Settings window
Controlling the DVP1 output trigger
You can set the output trigger to function in either Pulse mode (by selecting the Pulse Mode
option in the Trigger Settings window shown in Figure 194) or in Window mode. Pulse
mode emits a single pulsed signal. Window mode lets you control the output signal using
hardware events.
There are two hardware event settings for DVP1:
● FORCE_HIGH hardware events make the TRIGOUT signal rise from 0 to 1.
● FORCE_LOW hardware events make the TRIGOUT signal fall from 1 to 0.