User Manual

42 System Installation PLUS System Manual
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Figure 2-33: Tag Statistics
Next, check the TDOA stability, which is very important for reliable calibration. Open the TDOA
Stats window under the View menu. Select the Tag ID and clear the statistics. You may also wish to
select a specific Reader using the Filter by reader pull-down box to reduce the amount of data
presented. Allow the statistics to accumulate for several seconds, and then monitor the TDOA values
shown in the Max Peak-Peak column. Ideally, the Max Peak-Peak for a Calibration Tag should not
exceed 1 ns for the intended Reader pairs. Make note of the Reader pairs that produce good results, as
these will be specified in software for use during calibration. It is normal for some Readers to produce
large TDOA results if they are relatively far away from the Tag or if they are affected by signal
blockage. These less desirable Reader combinations should not be used for calibration.
Figure 2-34: TDOA Statistics
2.5.3 Setting up Reader-Tag Associations
Checking the throughput and TDOA statistics for each Calibration Tag will show which Readers can