User's Manual

Page 28

M Series Data Radio – User Manual

Part E – Getting Started- MR450

Received Signal Indicator

The “Rx/Synch” LED is used to indicate the state of the receiver. If

the LED is off, no signal is being received. A RED indication shows

that an RF carrier is being received, but no data stream can be

decoded. This may indicate the presence of interference or another

user on the channel.

A continuous GREEN indication shows that the modem is locked and

synchronised to the incoming signal, and has good Bit Error Rate

(BER).

Verifying Operational Health

It is possible to verify the operation of the radio modem using the

indicators provided by the unit. The state of the transmitter and

receiver, and data flow can be interpreted by the indicator LEDs (see

below).

Data Flow “breakout” LEDs

There is also a LED to indicate data flow into and out of the user port.

Data into the radio modem is shown as a RED flash, and received

data out of the modem is shown as a GREEN flash.

If data is alternately flowing in and out quickly, then the indicator

appears orange.

Half Duplex – Master or Slave (Tx)

Half Duplex – Master or Slave (Rx)

LED Legend