Chapter 1: Product description
Important regulatory information
Page 3
following two conditions:
•
This device may not cause harmful interference, and
•
This device must accept any interference received, including interference that may cause
undesired operation
The USA Federal Communications Commission (FCC) requires manufacturers to implement special features to
prevent interference to weather radar systems that operate in the band 5600 MHz to 5650 MHz. These features
must be implemented in all products able to operate outdoors in the band 5470 MHz to 5725 MHz.
Manufacturers must ensure that such radio products cannot be configured to operate outside of FCC rules;
specifically it must not be possible to disable or modify the radar protection functions that have been demonstrated
to the FCC.
In order to comply with these FCC requirements, Cambium supplies variants of the PMP/PTP 450 platform for
operation in the USA. These variants are only allowed to operate with license keys that comply with FCC rules.
To ensure compliance with FCC rules (KDB 905462 D04 Operational Modes for DFS Testing New Rules v01), follow
the recommendation in
Avoidance of weather radars (USA only)
.
Important regulatory information
External antennas
When using a connectorized version of the product, the conducted transmit power may need to be reduced to
ensure the regulatory limit on transmitter EIRP is not exceeded. The installer must have an understanding of how to
compute the effective antenna gain from the actual antenna gain and the feeder cable losses.
The range of permissible values for maximum antenna gain and feeder cable losses are included in this user guide
together with a sample calculation. The product GUI automatically applies the correct conducted power limit to
ensure that it is not possible for the installation to exceed the EIRP limit, when the appropriate values for antenna
gain and feeder cable losses are entered into the GUI.
Avoidance of weather radars (USA only)
To comply with FCC rules (KDB 443999: Interim Plans to Approve UNII Devices Operating in the
5470 - 5725 MHz Band with Radar Detection and DFS Capabilities), units which are installed within 35 km (22 miles)
of a Terminal Doppler Weather Radar (TDWR) system (or have a line of sight propagation path to such a system)
must be configured to avoid any frequency 30 MHz or –30 MHz of the frequency of the TDWR device.
This
requirement applies even if the master is outside the 35 km (22 miles) radius but communicates with outdoor
clients which may be within the 35 km (22 miles) radius of the TDWRs. If interference is not eliminated, a distance
limitation based on line-of-sight from TDWR will need to be used. Devices with bandwidths greater than 20 MHz
may require greater frequency separation.
Содержание PMP/PTP 450i Series
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Страница 47: ...Chapter 1 Overview of the PMP PTP 450 platform Page 1 5 Connectorized Use with an external antenna...
Страница 55: ...Chapter 1 Product description Page 1 13...
Страница 100: ...Chapter 2 System hardware Cabling and lightning protection Page 2 36 Cambium description Cambium part number...
Страница 118: ...Chapter 3 System planning Typical deployment Page 3 2 Chapter 3 Figure 28 Wall installation...
Страница 119: ...System planning Typical deployment Page 3 3...
Страница 120: ...Chapter 3 System planning Typical deployment Figure Page 3 4 29 Roof installation...
Страница 121: ...Chapter 3 System planning Typical deployment Figure Page 3 5 30 GPS receiver wall installation...
Страница 122: ...Chapter 3 System planning Typical deployment Figure Page 3 6 31 GPS receiver tower or mast installation...
Страница 123: ...Chapter 3 System planning Typical deployment Figure Page 3 7...