Campbell Scientific CR200/CR200X-series Dataloggers - Manual (Page 200)

Appendix F. Sensors and Peripherals
E.2.1 Use of Approved Antennas
FCC OET Bulletin No. 63 (October 1993)
Changing the antenna on a transmitter can significantly increase, or decrease,
the strength of the signal that is ultimately transmitted. Except for cable
locating equipment, the standards in Part 15 are not based solely on output
power but also take into account the antenna characteristics. Thus, a low power
transmitter that complies with the technical standards in Part 15 with a particular
antenna attached can exceed the Part 15 standards if a different antenna is
attached. Should this happen it could pose a serious interference problem to
authorized radio communications such as emergency, broadcast, and air-traffic
control communications.
Caution: In order to comply with the FCC RF exposure requirements, the
CR200(X) series may be used only with approved antennas
that have been tested with the on-board radio and a
minimum separation distance of 20 cm must be maintained
from the antenna to any nearby persons.
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