Measurement Computing WaveBook rev.3.0 - Manual (Page 106)

5-12 WaveView, 6-24-99 WaveBook User’s Manual
Multiple Ch Analog
This Trigger Source provides a scroll list of Trigger
Conditions for use with AND, or OR Logical Operators, as
follows:
(1) Selecting "OR channels" causes the acquisition to
trigger when any of the selected channel conditions
become true
(2) Selecting "AND channels" issues a trigger when all the
selected channel conditions become true.
If Multiple Ch Analog is selected, the Trigger Condition
option has the following choices:
◊ No Trigger. The channel will not be included in the
list of channels to examine for trigger conditions
.
Multiple Ch Analog
Provides a variety of Trigger Conditions and the
use of And or Or Logic Operators.
◊ Rising Edge. The signal level must first go below the trigger level by the user-set hysteresis amount.
Then, the trigger channel is valid whenever the signal level is above the trigger level and stays valid
until the signal level goes below the trigger level by at least the hysteresis amount.
◊ Falling Edge. The signal level must first go below the trigger level by the user-set hysteresis amount.
Then, the trigger channel is valid whenever the signal level is below the trigger level and stays valid
until the signal level goes above the trigger level by at least the hysteresis amount.
◊ Above Thresh. A trigger channel is valid whenever the signal level is above the trigger level and stays
valid until the signal level goes below the trigger level by at least the user-set hysteresis amount.
◊ Below Thresh. A trigger channel is valid whenever the signal level is below the trigger level and stays
valid until the signal level goes above the trigger level by at least the user-set hysteresis amount.
◊ Latch Rising Edge. The signal level must first go below the trigger level by the user-set hysteresis
amount. Then, the trigger channel is valid whenever the signal level is above the trigger level and stays
valid until the acquisition is complete.
◊ Latch Falling Edge. The signal level must first go below the trigger level by the user-set hysteresis
amount. Then, the trigger channel is valid whenever the signal level is below the trigger level and stays
valid until the acquisition is complete.
◊ Latch Above Thresh. A trigger channel is valid whenever the signal level is above the trigger level and
stays valid until the acquisition is complete.
◊ Latch Below Thresh. A trigger channel is valid whenever the signal level is below the trigger level and
stays valid until the acquisition is complete.
Note: To set the threshold voltage and hysteresis levels, position the cursor in the applicable channel cell
and enter the desired value.
In addition to the acquisition configuration aspects just discussed, WaveBook/516
includes a pin for receiving external clock input, a counter-timer, Digital-Pattern
Trigger, and a Pulse Trigger. Since these features do not apply to the WaveBook/512
series, they are discussed separately in the following section.
Digital Pattern (WaveBook/516 Series Only)
Digital Pattern trigger is discussed on page 5-13.
Pulse (WaveBook/516 Series Only)
Pulse Trigger is discussed on page 5-14.