DAP Technology 1394, Operation Manual

Page: 217 / 458

Filter/Trigger
217 Copyright © DapTechnology B.V., 2005-2019 - All Rights Reserved., 5/20/2019
the Max pre-trigger size slider. As soon as the Recorder is triggered, the data in the pre-trigger buffer will
not be overwritten anymore and the remaining Recorder memory will be filled. The Recorder will stop
when the complete Recorder memory has been filled or when the data after the trigger reached the the
amount indicated by the Max post-trigger size slider.
Max pre-trigger size
This slider is only enabled when the cyclic pre-trigger buffer option is enabled. With this slider you can
specify the size of this pre-trigger buffer expressed in % of the whole Recorder memory. You can also
type a value in the text box at the right from the slider.
Max post-trigger size
With this slider you can specify the amount of Recorder memory to be used maximal for data after the
Recorder has been triggered. If this amount have been reached, the Recorder will be stopped. Note that
the Recorder will also stop when the complete buffer has been filled. You can also type a value in the text
box at the right from the slider.
Trigger Always on
Inside this box you can select packets on which the Recorder should always be triggered. This works
independent form the Trigger Sequencer. Both the Trigger Sequencer and the detection of packets
specified here can trigger the Recorder.
Packet in set:
Here you can specify a Set or any boolean combination of the four packet Sets. If a packet is detected
that fits the Set or combination of Sets, the Recorder will be triggered.
The set names that can be used are 'seta', 'setb', 'setc' and 'setc'. The names are not case sensitive, thus
'SetA' is valid too. You also can use just 'a', 'b', 'c' or 'd' (or 'A', 'B' etc.) for the set names. The Boolean
operators are 'not', 'and' and 'or'. But they may be substituted by the characters '!', '&' and '|' respectively.
Parenthesis may be used to group the Boolean operation.
Some examples of valid expressions are:
setc
NOT SETB
(seta or setb) and not setd
!SetA & (SetC | SetB)
a
C or D
Note that a red cross will be displayed before the boolean expression when there is an error in the
expression.
Properties
In this box the properties of the flow item selected in the Trigger Sequencer will be displayed. For each
item type there is a separate property page. The name of the properties box will indicate this type. The
following property pages can be displayed:
· No Properties: If no flow item is selected or an item is selected with no properties then this page is
displayed. Items with no properties are the Start item, Stop item and Repeat-end item. It contains no
properties.
·
Wait Properties: When a Wait item is selected, this properties page will be displayed