Campbell RF401A Series, Инструкция по эксплуатации

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RF401A-Series Spread Spectrum Radio
9
TABLE 7-3. RS-232 Pinout (9-PIN D-SUB FEMALE)
PIN I/O DESCRIPTION
1
2
O TX
3 I RX
4
5
GND
6
7
8
O CTS
9
I = Signal into the RF401A series, 0 = Signal out of the RF401A series
7.6 LEDs
7.7 Antenna
The radios have a red LED label l ed Pwr/TX and a green LED labe l led 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. The
power mode determines how much of the time the receiver is listening. When
Power Mode is set to Always On , the red LED is always on. When Power
Mode is set to 0.5 seconds , the red LED flashes every 0.5 seconds. When
Power Mode is set to 1 second , the red LED flashes every 1 second. When
Power Mode is set to 8 seconds , the red LED flashes every 8 seconds. While
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
neighbo
u
ring network exists it is a good idea to choose a unique hopping
sequence.)
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