Specifications

 

Repeateroperationwithoutaduplexerrequiresthat
twoantennasbeinstalled,oneforreceivingandone
fortransmiing,so thatthe receivingantennadoes
not absorb energy from the transmitting antenna.
There are anumber ofways to dothis, depending
ontheTX/RXfrequencyseparation,andontheloca-
tionsavailableforantennamounting.Ifaduplexeris
used,asingleantennasucesforbothtransmiing
and receiving. If using a reduced-size duplexer,a
six-cavity model (minimum) is recommended. Ver-
tex Standard recommends theuse ofthe duplexer.
For further details, contact your Vertex Standard
dealer.
Regardless ofthe above choice, it is of paramount
importancethat theantenna(s) bemounted ashigh
and inthe clear aspossible, preferably within line-
of-sighttoallrepeaterusers.Furthermore,lossesin
thefeedline(s)mustbeminimized,sothefeedline(s)
should be high quality, and as short aspossible. If
along feedline is necessary, use coaxial  hardline
cabletoreducelosses.
Repeaterantennasshouldhaveanimpedanceof50
Ω
attheoperatingfrequency.Whenseparatereceive
andtransmitantennasareused,high-Qnarrow-
bandtypesmayservetominimizeinteraction.How-
ever,whenasingleantennaisusedwithaduplexer,
itshouldbealow-Qwide-bandtype.
  
 



Foruninterruptedoperationduringpowerfailures,a
12voltrechargeabletypebaery(55-Ahormorerec-
ommended)maybeconnectedtothe
BATT
terminal
postson therear panel.While the repeateris oper-
atingfromtheACsource,a slightchargingcurrent
willmaintainbaerycharge.IntheeventofanAC
power outage, the automatic power control circuit
willautomaticallyswitchtherepeatertothebackup
baery,andoperationwillnotbeinterrupted.
Aerprolongedoperationfromthebaery,itshould
be disconnected from the repeater and recharged
separatelybeforere-connecting,asthetricklecharge
is not sufficientfor recharging acompletely dis-
chargedbaery.



WhileoperatingfromabaeryorDCsupply,there-
peaterrequiresapproximately7amperesat12Volts
duringtransmit.

While the operatingtemperature range of the re-
peater isquite broad, thebestlocationisone in
whichtheairtemperaturedoesnotapproachtheex-
tremesofthespeciedrange,andonethatdoesnot
changerapidly.Makesuretoallowforfreeairow
aroundtheheatsinkontherearapronatalltimes.In
warmclimates,therepeatershouldnotbesealedin
asmallclosedroom.



Protect the repeaterfromwindand rain,and ex-
tremesintemperatureorhumiditythatmayshorten
theusefullifeoftheequipment.Trytolocatethere-
peaterinanenvironmentthatisalsocomfortablefor
servicepersonnel,ifpossible.
