User's Manual

Table Of Contents
PMP 400/430 and PTP 200 Series Canopy User Guide
Supplement
Issue 4 0DRAFT 6 November 2009 Page 28 of 64
Available 5.4 GHz channel center frequencies for each region are shown in Table 9. These vary
by region due to
different band edge RF specifications (for example, between Canada/US and
Europe)
requirements in US, Canada, Europe and Australia to not impinge on the frequencies
between 5600 and 5650 MHz, which are frequencies on which some weather radar
operate
Table 9: 5.4 GHz Channel Center Frequencies, by Region
Region
Range of Center Frequencies
Available (MHz)
(on 5 MHz centers within this
range, inclusive)
Maximum number of
non-overlapping
channels
US 5480 - 5710 24
Canada 5480 5595, 5655 - 5710 18
Europe 5475 - 5595, 5655 - 5715 20
US FSK (for comparison) 5495 - 5705 11
Canada FSK (for
comparison)
5495 - 5575, 5675 - 5705
7
Available 4.9 GHz channel center frequencies are shown in Table 10.
Table 10: 4.9 GHz Channel Center Frequencies
Range of Center Frequencies
Available (MHz)
(on 5 MHz centers within this
range, inclusive)
Maximum number of
non-overlapping
channels
4945 - 4985 5
The best practice for channel planning for APs is to conduct extensive site RF surveys before
choosing channels. The SM provides a basic Spectrum Analyzer that can be used for site
surveys. For more sophisticated analysis, consider consulting an experienced RF engineer and
using a full-featured spectrum analyzer.
3.2 DOWN TILT
The standard AP antenna produces a 3 db beam elevation (up and down) of 5°, with near-in null
fill that allows good coverage of close-in SMs that otherwise would be affected by the narrow
pattern. This is a narrower pattern than operators may be used to with standard Canopy’s 60° 3
dB beam, and may require down tilt on the antenna. The bracket of the standard antenna has
provision for measured down tilt. The recommended practice is to use one of the many radio
analysis and mapping tools or on-line tools to calculate down tilt based on antenna height above
the service area.
3.3 WEATHER RADAR
Spectrum between 5600 and 5650 MHz (sometimes called the “weather notch”) is used by some
weather radar and is not allowed for use by regulations in some regions, including US, Canada