Comtech EF Data HPOD - Installation Guidelines Regarding Power Line Quality

HPOD C-, X-, and Ku-Band High-Power Outdoor Amplifiers Revision 6
Preface MN/HPOD.IOM
xi
information, contact Comtech EF Data, Customer Support Department. The operators and 
techniciansmust:

• Knowhowtoworkaround,with,andonhighvoltageequipment.

• Exerciseeveryprecautiontoensurepersonnel safety.

• Exerciseextremecarewhenworkingnearhighvoltages.

• Befamiliarwiththewarningspresentedinthisman
ual.
Installation Guidelines Regarding Power Line Quality
Comtech EF Data has become familiar with the varying quality of the AC
p
ower
g
rid around the world. Observing the following installation guidelines
should help ensure a reliable installation.
• Grounding: The HPOD provides  a grounding terminal to allow you to ground the HPOD to
the antenna’s grounding network. All components installed at the antenna should be
groundedtoacommongroundingpointattheantenna.

• Surgesuppression:Highvoltagesurgescancausefailureofthepowersupply.Thecauseof
suchsurgestypicallyincludescirc
uitswitchingonthemainACpowergrid,erraticgenerator
operation,aswellaslightningstrikes.

WhiletheHPODfeaturesbuilt‐insurgesuppression,ifinstallationistobeinalocationwith
questionable power grid quality, Comtech EF Data recommends installation of additional
powercond
itioning/surgesuppressionatthepowerjunctionbox.

Lightning strikes on or around the antenna will generate extremely high voltages on all 
cablesconnected totheHPOD.Dependingontheseverityofthestrike,theHPOD’sinternal
surge protection combined with the recommended external suppression may protect the
HPOD’s power supply. Howe
ver, if installation is in an area with a high probability of
lightning strikes, Comtech EF Data  additionally recommends the installation of surge
suppression on the RF and IF cables. One source of these suppressors is PolyPhaser
(www.polyphaser.com).

• Electricalwelding:Ifwe
ldingneedstotakeplaceattheantenna,disconnectallcablesfrom
the HPOD except for the ground wire.  Cap all RF connections with terminations. This will
preventdamagetotheinput/outputcircuitryoftheHPOD.