MicrowaveradiorelaylinkZENITH80
37/52 1.2
RoughAdjustment
The rough adjustment can be done “by eye” using binoculars rested against the antenna. If the
visibilityisbad,ordistanceistoolong,youneedtodeterminetheazimuthfirstusingacompass.
Caution! Compass measurement accuracy is limited by steel mast construction! The rough pointing
shouldhaveavariation
ofmax.±5°fromtheidealantennaconnectingline.
We are trying to attain a signal of the opposite station by horizontalturning of the antenna by ±30°
from assumed direction. The vertical setting is changed gradually, and the scanning in the direction of
receptionisdonebyhorizontalturning.
Wedonotrecommendchangingbothdirectionsatthesametime.
Themaximumreceptionissetapproximately.
Figure23 PointingofAL80GElinkwithAL1‐80/APR(AL2‐80/APR)antenna
Finehorizontalpointing
• Loosen M10 bolt and nut using wrench no. 17. It is better to loosen the nuts without
unnecessaryplaythatwouldlatercausealossofexactdirectionaftertightening.
• Whileturningfinehorizontalpointingnutsofyoucanfindthemain lobeontheconnectedDC
voltmeterand
inthebeginningofmeasurementalsobothsidelobesoftheantennaradiation
characteristic.
• Settingofthemaximumlevelonthemainlobe.
• Afteryousetthe maximumlevelonthemainlobe, fixtheantennainthefounddirectionby
tighteningtheantenna su pportM10boltsand
nuts.
Fineverticalpointing
• Loosen M10 bolts. It is betterto loosen the nuts without unnecessary play that would later
causealossofexactdirectionaftertightening.
• WhileturningfineverticalpointingboltofyoucanfindthemainlobeontheconnectedDC
voltmeterandinthebeginningofmeasurement
alsobothsidelobesoftheantennaradiation
• Settingofthemaximumlevelonthemainlobe.
• Afteryousetthe maximumlevelonthemainlobe, fixtheantennainthefounddirectionby
tighteningtheantenna M10bolts.
Bolt(nut)M10
Loosenwhilehorizontalpointing
BoltM10
Finehorizontalpointing
BoltM10
Fineverticalpointing
BoltM10
Loosenwhileverticalpointing
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