User guide
Configuring Dart RTLS
D2119 Dart RTLS User Guide 37
area is available to all Receivers, these Receivers should belong to a single Virtual Group.
However, in cases where obstructions (such as walls or large machinery) make complete
coverage undependable, installing extra Receivers helps, especially when properly configured
into additional Virtual Groups.
A Virtual Group is a predefined group of Receivers for which Dart RTLS calculates and reports
positions. Any extra tag receptions from Receivers outside of that group do not influence the
position determination from that group. Virtual Groups can overlap, and a Receiver can belong
to several Virtual Groups. However, the system only performs position calculations with data
received from Receivers within a common group. This keeps unreliable receptions, typically as a
result of reflected signals, from harmfully influencing a position calculation.
Establishing Virtual Groups is a way of defining what Receivers are used in computing positional data; it is not
related to associating Receivers with reference tags for timing.
To define Virtual Groups:
1 Start Hub Administration and Management application, click Configuration.
2 In the Configuration view, under Hub Setup, in the Virtual Group table, right-click a row
and select Add to add a Virtual Group (optional).
3 To modify a setting for a Virtual Group, double-click the respective field in the row for the
Receiver that requires editing; to complete the edit, press Enter or click any other table cell:
Enabled: Double-click this field to activate or deactivate a Virtual Group and use it to
generate tag position output.
ID: Enter a user-assigned ID number for association with a particular Virtual Group.
Values can range from 1 to 32.
X-Y Bounds, Z Bound: Enter the boundaries for the positional data reported by this
Virtual Group. User can choose to not specify the boundary, and leave them as “none”. If
the boundary is specified, Dart RTLS discards any tag data (as computed by this Virtual
Group) outside of this space boundary.
Virtual group without boundaries should only be used in system installation phase. It makes system hard to
determine the scope to display in the Demonstration page and Site View of system configuration.
Double-clicking a table cell for X-Y Bounds opens the Edit VG Vertex dialog box. In this
dialog box, do the following:
If you do not want to specify the boundary, check the No Boundary; otherwise, uncheck
it. For a simple rectangular area, enter the two opposite vertices (that is the bottom left