Low Power Outdoor (LPOD) Amplifier/Block Up Converter (BUC)
Revision 15
Preface
iii
MN-LPOD
Safety and Compliance
CAUTION
It is important that you review and understand the Safety and Compliance information
that follows.
Electrical Safety and Compliance
CAUTION
NEUTRAL FUSING – DOUBLE POLE/NEUTRAL FUSING IS USED ON THE PRIME POWER
SUPPLY INPUT.
This equipment has been designed to minimize exposure of personnel to hazards. For further information,
contact Comtech EF Data Product Support. 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 manual.
Installation Guidelines Regarding Power Line Quality
Comtech EF Data has become familiar with the varying quality of the AC power grid
around the world. Observing the following installation guidelines should help ensure a
reliable installation.
•
Surge suppression
– High voltage surges can cause failure of the power supply. These surges
are typically caused by circuit switching on the main AC power grid, erratic generator operation,
and also by lightning strikes. While the LPOD does have built in surge suppression, if the unit is
to be installed in a location with questionable power grid quality, Comtech EF Data recommends
installation of additional power conditioning/surge suppression at the power junction box.
•
Grounding
– The LPOD provides a grounding terminal. This is provided to allow you to ground
the LPOD to the antenna’s grounding network. All components installed at the antenna should be
grounded to a common grounding point at the antenna.
•
Electrical welding
– If welding needs to take place at the antenna, disconnect all cables from the
LPOD except for the ground wire. Cap all RF connections with terminations. This will prevent
damage to the input/output circuitry of the LPOD.
•
Lightning
– Lightning strikes on or around the antenna will generate extremely high voltages on
all cables connected to the LPOD. Depending on the severity of the strike, the LPOD’s internal
surge protection combined with the recommended external suppression may protect the LPOD’s
power supply. However, if the installation will be in an area with a high probability of lightning
strikes, Comtech EF Data recommends the installation of surge suppression on the RF and IF
cables. One source of these suppressors is PolyPhaser (www.polyphaser.com).
