Appendix C: AIND AlignmentWinLink Performing WinLink AIND Alignment 11-143number of E1/T1 services available at a specified distance. In all-indoor typeinstallations, a long transmission line (RF cable) between the radio andantenna will be used; oftentimes over 100’. In this case the attenuation (RFloss) of the cable must be determined (for both sides) and entered as a dBloss in the Link Budget calculator. In many cases, a larger antenna isnecessary to compensate for this transmission line loss.Andrew LDF and AVA cables are good for minimizing loss.Performing WinLink AIND AlignmentThe supervisor of the antenna alignment is situated at the receive site withthe Spectrum Analyzer.Equipment SetupÆ To set up the antenna alignment equipment:1. Coarsely align the two antennas. Use the compass readings taken duringthe Site Survey to point the antennas in the correct direction.2. Connect the equipment as shown in Figure 11-1 but connect a spectrumanalyzer in place of the remote WinLink-AIND.3. Turn on the CW transmit signal from site A (from the WinLink NMS).4. At site B, tune the SA to the frequency transmitted.5. Increase the SA sensitivity according to the expected receive signal.Aligning the antennasWhen one antenna is moved, the opposite site is passive. Move the antennasvery slowly.Æ To align the antennas:1. Slowly move the site B antenna azimuth axis (the elevation axis should belocked) until you see the best signal on the SA Lock the azimuth axis.2. Slowly move the site A antenna azimuth axis (the elevation axis should belocked) until you see the best signal on the SA.3. Lock the azimuth axis.4. Slowly move the site B antenna elevation axis (the azimuth axis should belocked) until you see the best signal on the SA.Lock the elevation axis.5. Slowly move the site A antenna elevation axis (the azimuth axis should belocked) until you see the best signal on the SA.Lock the elevation axis.Note
