4RF Aprisa XE Технический документ - Страница 14

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4.7.

External E1 master clock

Figure 16 : External E1 master clock network diagram

The above network has external multiplexers which require the transport of Unframed E1. The Master

multiplexer at the "Local" site will provide the clocking for the entire network. The first radio clocks off the

Unframed E1 coming from the "Master Mux" with its clocking source set to External. The radio at the far

end of the link is set to "Link". The multiplexer at the "Remote" site has to be set to "External" or "Receive"

clocking (naming dependant on manufacturer)

As clocking information is carried in the Unframed E1 the radios could also be set to Internal at the Local

site and Link at the Remote site.

Aprisa XE Clocking Technical Paper

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Issued by: 4RF Customer Services 15 January 2009