User's Manual

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PRELIMINARY Designing for a Neutral Host System
8.7 Designing for a Neutral Host System
Designing for a neutral host system uses the same design rules previously discussed.
Since a neutral host system typically uses multiple systems in parallel, we find it best
to design for the worst case system so that there will not be holes in the covered area
and the economies of a single installation can be achieved. For example, as indicated
Section 7.1, the 1900 MHz RF signals do not propagate throughout a building as well
as the 800 MHz systems, therefore, we design to the 1900 MHz path loss formula.
8.7.1 Capacity of the Unison Neutral Host System
As indicated in Section 2.3, “System Bandwidths,” on page 2-10,
each Main Hub can support more than one sub-band of the Cellular
or PCS bands. The exception to this is the iDEN Main Hub, because
the SMR band is not split into sub-bands.
The 800 MHz Main Hub can support both the A band and the B band
simultaneously. Also, the 1800 MHz and 1900 MHz Main Hubs can
support two bands each (as the frequencies currently are allo-
cated).
For example, a neutral host system that consists of one iDEN, one
800 MHz, and two 1900 MHz systems can support up to seven sep-
arate service providers:
•1 on iDEN
• 2 on 800 MHz, A band and B band
• 2 in each 1900 MHz
Rich, what’s correct for Unison? JW