Handling The Bwx 8305 Basestation Antenna - Cisco BWX 8305 Installation And Commissioning Manual

Chapter 6 Installation
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If a BWX 8305 Basestation Antenna has Channel Filters installed, it must be operated at a center
frequency that exactly matches the center frequency for which the Channel Filters were manufactured;
otherwise, the equipment could be damaged. If no Channel Filters are installed, the Service Provider is
free to select or change the center frequency of the BS without damaging the equipment.
Note Depending on the country where the system is being used, a Channel filter or a Band filter or no filter
may be needed to meet the spectrum requirements of that region. In general, the cost associated with a
Channel filter is 3-5 times more than that of a Band filter - a consideration to keep in mind when
addressing a deployment for a specific region.
If the Channel Filters do not come installed and you have to install them, please refer to
Note
"BWX Antenna Channel Filter Installation Procedure"
If you are required to paint the BWX 8305 Basestation Antenna, for example because of environmental
Note
aesthetics, please refer to
6.3.1.2 High-powered BWX 8305 Basestation Antenna
The High-powered BWX 8305 Basestation Antenna unit operates in the 3475 to 3610 MHz range. This
antenna is intended for use with an BWX 8326 Basestation Combiner unit (which allows 2 Basestations
to share one antenna), but can also be used by a single Basestation to increase capacity. The
High-powered BWX 8305 Basestation Antenna yields 3 dB more than the Standard BWX 8305
Basestation Antenna antenna. See
information on the High-powered BWX 8305 Basestation Antenna, and
Basestation Combiner (3400 to 3625 MHz)"

6.3.2 Handling the BWX 8305 Basestation Antenna

It is a good idea to inspect the exterior of the BWX 8305 Basestation Antenna for any damage that may
have occurred during shipping, prior to placing it at the target site. Each of the antenna elements in the
BWX Basestation Antenna are covered by the individual radomes on the panel. At all times handle the
antenna carefully. If, during storage, filter replacement, or PA replacement, you must place a panel
antenna in a position laying down, make sure it rests flat on at least one inch of plastic foam to prevent
damage to the antenna elements.
OL-16336-02
2- Use a Channel filter:
The functions of Channel filter are two-fold: (1) to shape the power amplifier out-of-band emission
during transmission in order to meet FCC or other regulatory requirements; and (2) to provide high
rejection for close-in jammers during the receive period. The latter improves receiver selectivity. As
indicated by its name, the Channel filter operates in a specific limited frequency band (e.g.,
Bandwidth (BW) = 5 MHz) and has more stringent attenuation requirements. Normally, the
attenuation is 15-20 dB rejection for close-in frequencies.
Additionally, while a Band filter attenuation drop off is slower than that of a Channel filter, it has
much higher attenuation at frequencies removed from the central frequency (e.g., 60 dB).
3- Not use a filter at all
Appendix I, "Guidelines for Painting a Cisco Antenna."
for the procedure to do so.
Appendix J, "High-Powered BWX Basestation Antenna"
for information on the BWX 8326 Basestation Combiner
BWX 2305 Basestation Installation and Commissioning Guide
BWX 8305 Basestation Antenna Installation
Appendix H,
Appendix K, "BWX 8326
for more
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