Radwin 2000+ SERIES, Руководство пользователя

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RADWIN 2000+ Series User Manual Release 4.2.40 3 ‐ 5
RF Planning for Dense Installations and Collocated Sites
Carry out during a busy time of day, to best judge the worst ‐ case radio interference. Allow 2 ‐ 4
hours duration for a good RF survey.
3.7 RF Planning for Dense Installations and
Collocated Sites
Interference may arise from:
• Collocated RADWIN radios
• Other collocated radio devices installed on the same site
To avoid or minimize interference, follow these recommendations:
• For collocated RADWIN units, implement Hub Site Synchronization (HSS). This synchro ‐
nizes the transmission/reception times of the collocated radio unit.
• If one or more collocated units are not RADWIN units, ensure that there is a physical
separation of at least three meters between a RADWIN unit and any other collocated
radio on the site.
• Use the largest possible frequency gap between these units.
• Choose the best frequency channel (as clear as possible form interference). You may
have to use the Change Band facility available for all RADWIN 2000+ Series products.
• To select a frequency channel, move the link to Installation Mode (using Site configura ‐
tion) and start the Installation wizard. In the Channel Settings window, use the quality
bar at the bottom to help you choose a better channel (clearer of interference).
• Use the Spectrum View tool to find the best working channel ( Tools | Spectrum View ).
• Decreasing the Tx Power of a link will reduce collocation interference ( Site Configura ‐
tion | Air Interface ).
It is possible to install the link and use the RADWIN Manager to find a clear
channel. Each frequency channel can be evaluated in turn. Achievement of
a clear channel is indicated by the marker in the Quality bar on the
Channel Setting window (see Figure 6 ‐ 4 ) moving into the green area.
Use the Link Budget Calculator to determine the minimum Tx Power
required to maintain link stability.