OPISYS USHR-800 用户手册

For OUTDOOR use, an Omni-Directional Antenna with a maximum
gain of 34dBi is authorized for use with this unit.

Outside antennas must be positioned to observe minimum separation
of 20cm. (~ 8 in.) from all users and bystanders. For the protection of
personnel working in the vicinity of outside (uplink) antennas, the
following guidelines for minimum distances between the human body
and the antenna must be observed.

The installation of an OUTDOOR antenna must be such that, under
normal conditions, all personnel cannot come within 20 cm. (~ 8 in.)
from the outside antenna. Exceeding this minimum separation will
ensure that the worker or bystander does not receive RF-exposure
beyond the Maximum Permissible Exposure according to section
1.1310 i.e. limits for General Population/Uncontrolled Exposure.