Qtech-data-systems Q71 External 1200bps Modem User Manual download pdf (Page 4)

Q71B–QuickStartGuide–v1.1–April2013

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Configuration

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TheDATRANIIeXcelmustbeconfiguredsothatitwillusetheQ71Bforcommunications.

PoweruptheRTUandconnectQ90softwaretotheRTU.

Navigatetothe“Communications”tabandset“DeviceType”asshownbelow.

TheupperRS232portisconfiguredinthesameway.

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Q03RTUConfiguration XL4RTUConfiguration

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Diagnostics

TheQ71BhasthreestatusLEDs.

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PWR–Power.GreenLEDisonwhenpowerisapplied.

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RX–Receive.OrangeLEDinonwhenradiomuteisactive.

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TX–Transmit.OrangeLEDisonwhenRTUistransmitting.

IftheGreenPWRLEDisnotoncheckthefuse.

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Tuning

Q03RTUTuning

OncetheQ03DhasbeenconfiguredtousetheQ71B,thetransmitaudiosignallevelcan

be adjusted by pressing the “Set TX Level” button in Q90. This will make the Q71B

transmitacontinuoustone,andanACvoltagemetercanbeplacedacrossthepinsofthe

connectorlabelled“LVL”intheQ71B.

Turnthepotentiometeranti-clockwisetoreducethesignallevel

Turnthepotentiometerclockwisetoincreasethesignallevel

Note–thisprocesswillhavealreadybeenperformedaspartofthefactorysetupatQTech

priortodelivery.Thedefaultlevelis-3dBm(548mV)intoa600Ωresistiveload.

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XL4RTUTuning

ThisisperformedinaverysimilarmethodtotheaboveQ03processbutviaWorkbench.

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Qtech-data-systems Q71 External 1200bps Modem User Manual Page 4