Installation Manual - Meridian Microwave

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AR/GE/FE/U 80/80X Installation Manual 13. Repeat these steps on far end radio. 3.9.5 Fine Adjustment 14. Ensure to loosen the “fine adjustment” bolt (the small eye bolt). 15. Pan antenna slowly from left to right and capture the highest RSL voltage peak. 16. See Figure 3.9.51 below to help guide you in obtaining the highest RSL voltage reading. 17. Tighten down the azimuth adjustment bolts. 18. Loosen the two bolts holding the antenna to the antenna mount. 19. The vertical fine adjustment bolt is not designed to be tightened; use the “hex nut” to fine (and course) adjust the elevation (vertical position) to highest RSL value. 20. While monitoring the voltmeter, begin to align the vertical position of the antenna to obtain the highest RSL voltage level. 21. Once completed, this fine adjustment must be repeated at the remote end of the system, if you have not obtained the “target” RSL voltage for the given path distance (see RSL Vs. distance chart in Appendix B). 22. If you have not obtained the “target” RSL voltage for the given path distance (or you want to further improve it), you will need to realign the antenna, go back to the original site you started with and restart steps 1421 and realign again. See Figure 3.9.51 below of a conceptual illustration of the antenna beam to keep in mind while you perform a realignment. 23. Once again, the very narrow beam width of these antennas (0.4º and 0.9º) makes it necessary to completely tighten the bolts of the azimuth adjustment while adjusting the elevation and vice versa. Verify that the RSL voltage falls within the expected range based on the graph in Appendix B. 23 58000519 rev. D
AR/GE/FE/U 80/80X Installation Manual Main Beam First Sidelobe Second Sidelobe (sometimes undetectable) Nulls Center Location Target Voltage Below Target Voltage Common “First Try” Possible “First Try” Possible “First Try” Possible “First Try” Figure 3.9.51: This illustration is a conceptualized cross section of a beam to exemplify a horizontal RSL level voltage reading against relative locations with an assumed fine tuned vertical position. Keep in mind how narrow the beam is at 80GHz, the 3dB beam width for 80GHz is 0.9º with 12” antenna and 0.4º for 24” antennas with the extended range models 80X. 24 58000519 rev. D
Page 1 and 2: Making connections in a highspeed
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Page 5 and 6: Table of Contents AR/GE/FE/U 80/80X
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Installation Manual - Meridian Microwave

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