User Manual for Tersus Radio RS400H3-A V1.0
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(2) In an environment with a high temperature of more than 40 °C or
intense sunlight, the surface of the radio would be hot when it is transmitting at
high power. It may cause scald if the surface of the machine is touched directly.
Please pay special attention.
2.4.2 Antenna installation
Whether the antenna is properly installed and erected would seriously affect
the transmission distance of the radio, hence the correct connection and
installation of the antenna is of high importance.
(1) It is strictly forbidden to use a damaged antenna. The output
impedance of the antenna interface of this radio is 50 ohms. Please use
antennas and feeders with input impedance of 50±2 ohms and VSWR less
than 1.5. Using an antenna that is not strictly matched with this radio would
result in a shortened transmission distance for the radio, and it is possible to
damage the radio if the mismatch is particularly serious.
(2) The original antenna of this radio is strictly matched with this radio, and
the performance meets the requirements of this radio. The original antenna of
this radio would better play the performance of this radio.
(3) Under normal circumstances, the height of the antenna installed from
the ground would significantly increase the transmission distance and improve
the transmission effect.
(4) Carefully check the connection of the antenna, feeder, connector and
the components of the radio to ensure well contact and reliable connection
between the antenna and the connector of the radio.
