Measurement Computing WavePort rev.3.0 - Manual (Page 66)

6-14 WaveView 09-29-00 WavePort User’s Manual
Trigger Types
The Trigger selection pull-down list allows you to select
the triggering method to start the scan. The figure shows
the various triggering options available.
Immediate
Triggering starts immediately when the Arm toolbar
button of WaveView Scope is clicked.
Manual
Prior to acquiring data, the system must first be
armed by clicking on the Arm toolbar button of
WaveView Scope. Triggering starts when the
Trigger button is clicked.
Trigger Source Pull-Down List
(On Acquisition Configuration Dialog Box)
Provides the means of selecting the desired Trigger Type.
Digital
Selecting Digital brings 2 triggering options to the
Trigger selection box, allowing you to select either a
"Rising" or "Falling" edge trigger. The TTL trigger
signal connects to pin (TTLTRG) of the Digital I/O
& Trigger port on the WaveBook front panel.
Digital Trigger
With Digital Trigger, the user must indicate Rising or
Falling Edge.
Channel 1 Analog
This option allows you to set up additional
parameters for the acquisition of analog data.
Several new items are added to the Trigger selection
box, including options for the Trigger Condition
and Trigger Threshold.
The selections for trigger correspond to the
following trigger conditions:(1) "Rising Edge",
where the signal level must have a positive slope as
it crosses the trigger threshold, or
Channel 1 Analog Trigger
Allows you to set a Trigger Threshold Value and indicate
whether the signal is to be Rising or Falling in relation to
the trigger line.
(2) "Falling Edge", where the signal level must have
a negative slope as it crosses the trigger threshold. Note: Channel 1 Analog triggering is only valid for
channel 1.
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.