User's Manual

P330 Data Sheet / User Guide 41
DRAFT
very short value, in this case, to less than 30 meters. Another approach would be to add a significant
number of references to the system. Intermediate solutions are also possible. But failing to consider
propagation performance in the system design will result in a very unhappy customer.
6.2.2 Examples of Operational Range
The figures in this section illustrate operational performance of distance of 4 standard radio
configurations for each of three deployment scenarios. These figures are followed by a table
summarizing performance.
The four standard configurations are:
 RF Channel 5 (High Ranging Rate) PRF 64M, Preamble 128, Data Rate 6.8Mbps
 RF Channel 5 (Low Ranging Rate) PRF 64M, Preamble 1024, Data Rate 110kbps
 RF Channel 5 (High Ranging Rate) PRF 64M, Preamble 128, Data Rate 6.8Mbps
 RF Channel 5 (Low Ranging Rate) PRF 64M, Preamble 1024, Data Rate 110kbps
The three scenarios are
 1.7m to 2.3m (tag mounted on a person’s helmet or on a robot to a wall mounted reference)
 1.7m to 1.7m (tags mounted on helmets)
 1.0m to 1.0m (tags on pallets or attached to a person’s belt).
Performance statistics are shown in Red in the lower right hand corner of the following figures. The
values to the left of the / indicate the range of values for the minimum and maximum reliable
operating range while the number to the right indicates the maximum range achieved. These are
subjective values based on the author’s opinion. The reader is encouraged to consider this data in the
context of a specific application and suggest better values.
As a side note, the Matlab used to collect and produce these figures is provided with the equipment
and can normally be found on the Time Domain website.
Fig. 6-2: RF Channel 5 (High Ranging Rate) Received Signal Strength vs Range for 3 scenarios
1.0 – 1.0 m
1.7 – 1.7 m
1.7 – 2.3 m
30-60m / 120m