User's Manual

Document Number: 0100SM1401 Issue: 10-14

LED indicators

Part F – Quick Reference Guide

Indicated State Pwr/Tx

No power, or

ShutDown

Power on

Transmitter On

Each image below shows where to find the LED indicators of each Q data radio.

Top of QR450

Front of QR450

Front of QB450 & QP450 Front of QB450 & QP450

Pwr/TX - DC Power & TX LEDs

If all the LEDs are off, no DC power is reaching the radio modem or the internal fuse is open.

Successful power-up is indicated by the Pwr/Tx LED showing a continuous GREEN state.

Tx Indicator (Tx) : When the transmitter is active the Pwr/Tx LED is in a RED state.

Note: The QR450 will take approximately 60 seconds to boot up - during this time, the DC

power LED will flash green/off periodically along with various LED activity. Please wait until

the DC power LED is not longer periodically flashing and is in a solid green state before

attempting to communicate with the radio.

Indicated State

Synch/

RxSig

No received signal

Receiver in SYNC state

RSSI over mute level

and no sync

Indicated State COM1/2

No Activity

RxD Data Output

TxD Data Input

RxD & TxD Data Active

Sync/No RX - Synchronisation and No Received Signal LEDs

A flashing or solid green Sync/No RX LED indicates that the modem is receiving

decodable transmissions from another source.

A regular/solid flashing red Sync/No RX LED indicates that the modem is receiving

un-decodable transmissions from another source. This symptom can be caused by

insufficient RX signal, too much interference or an incorrect configuration parameter

set within the pair of modems.

TxD/RxD (COM 1 and COM 2) - Serial TxD/RxD LEDs

The RxD/TxD LEDs indicate data flow into/out of the serial user port. Data being

sent to the port for transmission is indicated by a red flash, and data being received

over the air and then forwarded to the serial port is shown as a green flash. As

the serial port is full duplex, there may be instances where the TxD and RxD LEDs

illuminate simultaneously, this will be indicated by an amber illumination of the port

LED.