User's Manual

Personnel Alert: Base Station
User Manual
Proper operation of the Personnel Alert system requires that
robust data transfer in both directions: from the base station
to the badges, and from the badges to the base station.
The 1 Watt maximum transmit power of the base station can
never be exceeded. However, by using the attenuation
adjustments, it can be reduced by up to 40dB. Attenuation
can also be used to adjust the receive path in the base
station to maintain a similar loss in both the receive and
transmit links.
The transmit power levels and the receive sensitivity are
fixed for the badges and cannot be adjusted.
To adjust the base station attenuation levels, it is necessary
to physically walk with a badge within the coverage area(s) to
determine the range of each base station.
After establishing the boundaries between the coverage
areas, review the site plans to determine if base station
power levels need to be reduced.
If a “coverage hole” is revealed, verify if
• an additional base station is required,
• attenuation reduction of the neighbouring base stations
is required,
• the mounting height of the base station needs to be
increased, or
• the location of the base station needs to be changed.
Note
Adjusting attenuation levels requires trial and error
to test various settings for optimum transmission.
For the base station, initially set both the transmit and
receive paths to minimum attenuation levels for maximum
power. If overlapping results between base stations, then
adjust the attenuation to reduce the span of the coverage
area.
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