Motorola Solutions Inc. 89FT7622 Manual Do Utilizador
Horizontally Polarized Modules
Product Note
Issue 1, April 2007
Page 9 of 18
3 Installation
3.1.1 5.7 GHz AP modules with connectorized antennas
For connectorized units, installation requires attention to both the Canopy AP and the approved
antenna.
antenna.
The connectorized AP itself has the same form factor and installs the same as previous modules.
To install the connectorized flat panel antenna to a mast or structure, follow instructions that the
manufacturer provides. Install the antenna safely and securely, consistent with industry practices.
manufacturer provides. Install the antenna safely and securely, consistent with industry practices.
The Universal Mounting Bracket available from Motorola (Part Number SMMB-1 and consisting of
a mounting bracket and L-shaped aluminum tube) holds one Canopy module, but cannot hold
both the module and a connectorized antenna. The SMMB-2 is a heavy duty bracket that can
hold both a connectorized 5.7 GHz AP and its connectorized antenna.
a mounting bracket and L-shaped aluminum tube) holds one Canopy module, but cannot hold
both the module and a connectorized antenna. The SMMB-2 is a heavy duty bracket that can
hold both a connectorized 5.7 GHz AP and its connectorized antenna.
Be aware that the elevation (top to bottom) of the antenna pattern of the approved antenna is only
5° instead of the 60° of the integrated antenna. Depending on location of SMs and terrain,
downtilt of the antenna may be needed to ensure best coverage.
5° instead of the 60° of the integrated antenna. Depending on location of SMs and terrain,
downtilt of the antenna may be needed to ensure best coverage.
The professional installer is responsible for
◦
selection of an antenna that the regulatory agency has approved
◦
setting of the gain consistent with regulatory limitations and antenna
specifications.
specifications.
◦
ensuring that the polarity—horizontal or vertical—is identical on both ends of the
link. (This may be less obvious where an integrated antenna is used on one end
and a connectorized on the other.)
link. (This may be less obvious where an integrated antenna is used on one end
and a connectorized on the other.)
◦
use of moisture sealing tape or wrap to provide long-term integrity for the
connection.
connection.
IMPORTANT!
The professional installer is responsible for ensuring modules as installed meet
regulatory requirements. In the US, this means the professional installer must
ensure the transmitter output power of a connectorized 5.7 GHz AP with the
approved antenna is set to no more than 19 dBm.
regulatory requirements. In the US, this means the professional installer must
ensure the transmitter output power of a connectorized 5.7 GHz AP with the
approved antenna is set to no more than 19 dBm.
On a module with an external antenna, use accepted industry practices to wrap the connector to
prevent water ingress. Although the male and female N-type connectors form a gas-tight seal with
each other, the point where the cable enters each connector can allow water ingress and
eventual corrosion. Wrapping and sealing is critical to long-term reliability of the connection.
prevent water ingress. Although the male and female N-type connectors form a gas-tight seal with
each other, the point where the cable enters each connector can allow water ingress and
eventual corrosion. Wrapping and sealing is critical to long-term reliability of the connection.
Possible sources of material to seal that point include
◦
the antenna manufacturer (material may have been provided in the package with
the antenna).
the antenna).
◦
Universal Electronics (whose web site is
http://www.coaxseal.com
), who markets
a weather-tight wrap named Coax-Seal.