Campbell Scientific RF401A-Series Spread Spectrum Radios - Manual (Page 19)

RF401A-Series Spread Spectrum Radio
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8 O CTS
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I = Signal into the RF401A series, 0 = Signal out of the RF401A series
7.6 LEDs
The radios have a red LED labeled Pwr/TX and a green LED labeled RX.
When 12V power is applied, the red LED lights for ten seconds. About three
seconds after power-up, the green LED lights for a second. Ten seconds after
power-up, the selected standby mode begins to control the red LED.
The red LED lights to indicate when the receiver is actively listening. When
the receiver detects RF traffic (header or data with the same hopping
sequence), the red LED will light steadily. When radio is transmitting, the red
LED will pulse OFF as the RF packets are transmitted (it will not be on solid).
Green LED activity indicates that there is an RF signal being received whose
hopping sequence corresponds to the configured hopping sequence of the
RF401A series. This does not necessarily mean that the network/radio address
of the received packet corresponds with that of the RF401A series. (Where a
neighboring network exists it is a good idea to choose a unique hopping
sequence.)
7.7 Antenna
The radio has a reverse polarity SMA (RPSMA) jack antenna connection. It is
important to note the distinction between RPSMA and SMA connectors when
selecting a mating antenna or antenna cable.
7.7.1 Compatible Antennas
Campbell Scientific offers antennas to satisfy the needs for various base station
and remote station requirements. All antennas (or antenna cables) that attach
directly to the radio have an RPSMA plug connector. The use of an
unauthorized antenna could cause transmitted field strengths in excess of FCC
rules, interfere with licensed services, and result in FCC sanctions against the
user. One of the following antennas listed below must be used.
An FCC authorized antenna is a required component. You
must pick one of the antennas below.
In order to comply with the FCC RF exposure requirements,
the RF401A series may be used only with approved
antennas that have been tested with these radios and a
minimum separation distance of 20 cm must be maintained
from the antenna to any nearby persons.
CAUTION
CAUTION
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