MicrowaveradiorelaylinkZENITH80
49/52 1.2
dropped.Aspecificformoftransportisamatterofagreementbetweenthemanufacturerandtheclient.
The radio relay units must be stored in dry, partially air‐conditioned areas. The range of storage
temperaturesis‐25÷+55°C,withtherelativehumiditymax.85%.
7.5 ANTENNASYSTEMS
Parabolic antennas for fixed connection to ODU were developed for the 80 GHz band. The ALCOMA
parabolic antennas can be used for horizontal and vertical polarization and left or right hand installatio n
withoutmodifications.Allantennasarestandard equippedbyfrostprotection.Thechangeofpolarization
isperformedbyturningODU
by90°.
Type
Compactmicrowave
antennas
AL1‐80/APR AL2‐80/APR
Paraboladiameter
∅0,35m ∅0,65m
AntennagainG
ant
(73,5GHz) 46dBi 51dBi
AntennagainG
ant
(83,5GHz) 47dBi 52dBi
Mainlobe3dB
±0,4° ±0,2°
Finehorizontaladjustment
±20° ±20°
Fineverticaladjustment
±20° ±20°
Weightofcompactantennas 8,1kg 11kg
Diameterofinstallationstand
4
min.
∅ 42mm ∅ 42mm
max.
∅ 120mm
Table15 80GHzantennaparameters
Radiation patterns are in measuring protocols for certification of ALCOMA antennas. Those may be
suppliedwhenrequired.
4
Supportingpipelengthsmustguaranteesufficientrigidityconsideringclimaticinfluencesofsurrounding
environment.
CAUTION
Beawareofairhumiditycondensation.
Condensationof air humidity inside thelink mayoccur when movingthe unit from cold to
hotplaces.Itisforbiddentoswitchontheequipmentuntilthosepartsarenotdried.
CAUTION
Use tough constructions for installation of antenna systems. Construction should enable
stable pointing even under bad weather conditions. The main lobe of antenna radiation
diagramis±0,4°for0,35mantennaand±0,2°for0,65mantenna.
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