User Manual

PLUS System Manual Visualizer 129

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5.8 Logfile Formats

5.8.1 Position Data

The Position Data is logged to the file specified via the Menu Bar / File / Logging… submenu item.

See Section 5.2 Menu Bar.

5.8.1.1 Position Data Record

Position data records are the timestamped Tag positions as computed by the PLUS location engine.

 Timestamp Time the position data was recorded, represented as the number of 100-

nanosecond intervals since January 1, 1601 (64 bits)

 TAGPOS Record type TAGPOS

 tagID ID of the Tag whose position is being reported

 X X coordinate of the solution

 Y Y coordinate of the solution

 Z Z coordinate of the solution

 NumReceivers Number of receivers which participated in the solution, i.e. heard the Tag

 Confidence Percent confidence factor for the solution – the higher the factor the greater the

confidence of the solution

 SeqNum Sequence number from the Tag payload that cycles from 0 to 63

 Best Receiver ID of the Reader with the best TOA solution – statistical weight based on

Reader RSSI and proximity to the Tag.

5.9 Troubleshooting the Visualizer

 Lost contact with a Reader

Lost Reader contact usually occurs due to network based problems. Check all cables and

connections between:

1) The PC and the SDP

2) The SDP and its connected Readers

3) Any daisy chained Readers

If all connections are good, reboot the Reader, or reset the power to the PLUS Reader itself. See

# Timestamp, TAGPOS, tagID, X, Y, Z, NumReceivers, Confidence, SeqNum, Best Receiver

# All times are in seconds and coordinates in meters

0x01c82081c13356c6, TAGPOS, 0x00000651, 3.925, -5.427, 1.359, 14, 57, 6, 0x0050c216af90

0x01c82081c13ce022, TAGPOS, 0x0000065a, 2.992, -4.300, 1.148, 15, 76, 52, 0x0050c216afe5

o 0x01c82081c1630592, TAGPOS, 0x0000086e, -2.936, -1.450, 1.338, 16, 64, 8, 0x0050c216afe5