YDI Link CX-24 User Manual
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Contents
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Link CX-24 User’s ManualVersion 1.0 Page 35 February 2004incursion and damage. For all exposed connectors, including those between an external antenna and theLink CX-24, perform the following:39 Wrap each connector with vinyl or plastic electrical tape.40 Wrap the vinyl or plastic electrical tape with butyl rubber amalgamating tape to prevent moisture frompermeating the connector.41 Wrap the butyl rubber amalgamating tape with vinyl or plastic electrical tape.Continue with Section 2.14 to fine tune the antenna’s azimuth and elevation.2.14 Aligning the AntennaThis section includes steps used to fine-tune the antenna alignment using RSSI as measured using avoltmeter. This part of the installation procedure is most easily accomplished with installers at each end ofthe radio link who are in communication with one another.Notes: i) Failure to follow this antenna alignment procedure may damage your equipment and mayrender the radio unusable. Read through the entire procedure before attempting adjustment.Contact YDI with any questions.ii) When you apply power to the Link CX-24, it starts transmitting. Do not stand within 2 m (79in.) of the front of the antenna during Link CX-24 operation to avoid harmful RF radiation.2.14.1 Adjustable Azimuth/Elevation MountPerform Steps 42 through 49 on the local radio. Then, repeat these steps for the remote radio. SeeFigure 2.17.42 Remove the cap from the BNC connector of the remote radio. Attach the hand-held voltmeter andBNC test lead to the test point.43 Fine Azimuth Alignment -- Rotate the Link CX-24 mounting bracket on the pole until the properazimuth alignment is achieved. It is advised that, in order to ensure the true maximum, you shouldadjust through the maximum RSSI reading until the reading clearly drops and continues to drop tolower level side-lobes. Adjust back until the maximum is again attained. Expected voltage is morethan +1 VDC. The adjustment should be slowly tuned through the peak, and reset at the absolutemaximum before tightening.44 Fine Elevation Alignment -- Rotate the Link CX-24 mounting bracket until the proper elevationalignment is achieved. It is advised that, in order to ensure the true maximum, you should adjustthrough the maximum RSSI reading until the reading clearly drops and continues to drop to lowerlevel side-lobes. Adjust back until the maximum is again attained. Expected voltage is more than +1VDC. The adjustment should be slowly tuned through the peak, and reset at the absolute maximumbefore tightening the bolts.45 Tighten the two Azimuth adjustment bolts while observing the RSSI reading to ensure the azimuthalignment does not change while tightening. Torque the two M8 galvanized hex bolts to 24 N-m(17.7 lb-ft).46 Tighten the Elevation adjustment bolt while observing the RSSI reading to ensure the elevationalignment does not change while tightening. Torque the M8 galvanized hex bolt to 24 N-m (17.7 lb-ft).CAUTION: It is possible to obtain a false peak RSSI reading from the signal of a side-lobe. Up to threedifferent side-lobes on either side of the main lobe may give false peak alignment readings. |
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