User's Manual

Page 27
M Series Data Radio – User Manual
© Copyright 2004 Trio DataCom Pty. Ltd.
Optimising the Antenna for best RX
signal
Once the unit is operational, it is important to optimise the antenna
tuning.
In the case of a directional antenna, it will be necessary to align the
antenna for the best received signal.
This can be done by using the (0-5Vdc) output on Pin 9 of the Port to
indicate signal strength (RSSI). This voltage can be converted to dBm
using the chart below.
LED Indicators & Test Outputs
Radio is Powered
If all the LEDs are off, check if power is reaching the radio modem.
Successful power-up is indicated by the “PWR” LED indicating a
continuous (healthy) GREEN state.
LED Legend
Part E – Getting Started- MR450
Radio Errors
Internal radio management software monitors many aspects of the
radio hardware. Under certain circumstances radio faults may prevent
normal operation. In the event that these fault conditions occur, the
radio will enter an ERROR state and this will be indicated by flashing
ALL LEDs RED, then flashing a pattern of GREEN LEDs. The pattern
of all GREEN LEDs represents the specific type of error that has
occurred. See Table below.
All other patterns indicate serious hardware errors that can only be
fixed by an authorised service center. Please record this pattern and
return the result with the service return information.
Note (1): If external voltage is too high (>16Vdc) radio damage may
occur. If the external voltage is too low (<10Vdc) the radio may not
operate within specifications.
Note (2) : If this error occurs the radio will need to be returned for
service.
Analog RSSI Output Characteristics - M Series Data Radio
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
-120 -110 -100 -90 -80 -70 -60 -50 -40
Received RF Level (dBm)
User Port RSSl (DC Volts)
User Port Synch/
RxSig
Pwr/Tx Error Diagnosis
OFF OFF ON External Supply
Voltage out of spec. (1)
ON ON OFF VCO Out of Lock. (2)
Note that this LED turns RED when the transmitter is active.