User's Manual

9 | P a ge
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BDACONNECTIONS
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TheBDAusesanexternalpowersupplywhichconnectsthroughasinglepin15VDCinputlocatedonthe
backoftheunit.
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Aoptional9‐pinD‐Subconnectorprovidesfailurealarmoutputcontacts.
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TheRFconnections aremadevia twotype “N” female connectors. The RFconnector labeled “BASE”
must be connected to the antenna pointing towards the base station. The RF connection labeled
“MOBILE”mustbeconnectedtotheantennafacingtheareatobecoveredbytheBDA.
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TheRFconnections mustbemadethroughcableswithcharacteristici
mpedanceof50ohms.
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The isolation between the base station antenna and the mobile antenna should be at least 15 dB
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higher than the BDA gain.
 Isolation less than this value can cause gain ripple across the band.
Isolation equal to or less than the BDA gain will give rise to oscillations which will saturate the
amplifiersandpossiblycausedamagetotheBDA.
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Connector from
Donor Antenna
Connector to
DAS
DL Alarm
LEDs
UL Alarm
LEDs
Power
On LED