User's Manual

4.SettingUptheReceiver
N72GNSSReferenceReceiverUserGuidePage20
powerthereceiver.TheinternalbatterycanalsooperateasaUPSforupto
17hours.AUPSprotectstheequipmentfrompowersurgesandspikes,and
keepsthereceiverrunningduringshortpoweroutages.
Formoreinformation,contactyourlocal
CHCdealer.
4.1.4. LIGHTINGANDSURGEPROTECTION 
CHCrecommendsthatyouinstalllightningprotectionequipmentat
permanentsites.Allconnectionstothereceivershouldhavesurge
protection.Typically,theminimumprotectionshouldincludeasurge
protectorintheantennafeedline, onthereceiver'spowersupplysystem.If
serialdevicesareattachedtothereceiver,thoseserialconnections
should
alsobeprovidedwithsurgeprotection.Also,protectanycommunications
andpowerlinesatbuildingentrypoints.Ifyouuseotherantennas,suchasa
radiomodemthatdistributesreal‐timecorrectionmessages,installsurge
protectiononthoseantennafeedsaswell.
Nosurgeprotectiondevicescanofferprotection
unlesstheyareconnected
toanexcellentgroundusingverylowimpedanceconductors.Equipment
damagecausedbyelectricalsurgesoccursinmanypermanentinstallations
eventhoughsurgeprot ectionisinplace.Commonly,thisisbecausethe
groundingsystemusedwasdesignedtoprotectagainstACelectricalhazards
ratherthantodissipate
thesudden,highcurrentsurgescausedbylightning.
Pleaseconsultwithalightningprotectionexpertorresearchthetopicwhen
planningpermanentinstallations.
Formoreinformation,contactyourlocalCHCdealer.
4.1.5. PLACINGTHEANTENNA
Theantennaloca tionwillhaveasignificanteffectonthequalityofyourN72
receiver'sperformance.Intemporarydevelopmentsitmaynotalwaysbe
possibletosetuponanideallocationwithanexcellentskyview.However,
wheninstallingapermanentstation,besuretoplantheantennalocation
and
mountingsystemcarefully.
Thegeneralrequirementsfortheantennalocationandmountare:
 Keepthedistancefromtheobjectsthatmaycausethemultipatheffects
(suchasbuildings,trees,reflectivesurface)foratleast200m(656feet)
 Clearskyabove10degreeselevation
 Awayfromelectromagnetism
interferenceregion(e.g.Microwave
station,radiotransmittingstation,highvoltagewires)atleast200m
(656feet)
 Mounted1.5m(5feet)aboveanynearbysignalreflectors.