Filter
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Chapter 3 Windows and Menus
NI-FBUS Monitor User Manual 3-16 ni.com
refilter the data and display the desired packets, click on the packet types
that you want to view again. The data filtered out during capture is not
accessible. For example, after capture, you cannot recover Pass Token (PT)
FDL packets if they were not enabled during capture.
Basic Filter Logic
A filter behaves differently depending on whether you select addresses on
the Filter by Address tab. If no addresses are selected, the filter uses all
addresses and combines the FDL Filter and FMS Filter choices, and
captures the types of packets checked in those dialog boxes. If any
addresses are selected on the Filter by Address tab, incoming packets
are first screened for their address. If the address is one of the selected
addresses, it is then compared to the FDL filter and the FMS filter.
Pseudocode for the filter follows:
If no addresses are selected in the Filter by Address tab:
Packets Captured = FDL Filter + FMS Filter
If addresses are selected in the Filter by Address tab:
Packets Captured = Address(es) * (FDL Filter + FMS Filter)
Where + stands for or and * stands for and.
Filter Dialog Box
To view the Filter dialog box for a filter window, right-click the mouse to
bring up the Capture menu and select Filter Settings, or you can click the
Filter Settings toolbar button. The title bar of a filter displays the name of
the filter window to which it is attached. The filter appears as a dialog box
with three tabs—FDL Filter, FMS Filter, and Filter by Address. You can
open the Filter dialog box any time before, during, and after capture, or you
can hide it from view.
The following sections describe the tabs on the Filter dialog box.