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When the receiver is out of range, the control unit sets an OUT bit in
the first byte of its data report to the host computer. This data report
contains the last valid report when the receiver was in range. This last
valid report allows the application to use the returned data report.
If the receiver is out of range when the control unit returns the first data
report, the control unit sets the OUT bit and the positional and
orientation data contains all zeros. This allows the application to notify
the user to move the receiver into range.
Also, if the receiver's tracking speed exceeds 30 inches per second, the
control unit sets the OUT bit.
Note
The FRINGE bit and the OUT bit are mutually exclusive;
therefore, the control unit never sets both bits simultaneously.
The FRINGE Bit
The FRINGE bit is located at Bit 6 in the first byte of the 3D mode
mouse data report (see Table 6-2 in Chapter 6).
The OUT Bit
The OUT bit is located at Bit 5 in the first byte of the 3D mode mouse
data report (see Table 6-2 in Chapter 6). This bit signifies three out-of-
range conditions:
• when you move the receiver out of the out-of-range area
• when the receiver is not in a direct line of communication with the
transmitter
• when you move the receiver faster than the maximum tracking speed
System Operation
33
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