ADC Digivance NXD - Manual (Page 4)

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Digivance ® NXD
Digital Distributed RF
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Digivance NXD Hub
The Digivance NXD hub is typically located at a
remote BTS or a facility building housing a suite
of base stations near the area requiring coverage.
On the forward path, the system digitizes the
designated RF band, electrically multiplexes
signals with other RF bands into a single digital
link, and transports it over singlemode fiber to
the remote unit. The system can also digitally
simulcast multiple remotes from a single base
station sector. On the reverse path, the system
receives the digitized signals from multiple RANs
and converts them to RF. The hub performs all
monitoring, control and alarming of information
for the RAN.
For large system deployments, multiple NXD
links are networked together at the hub. Remote
alarm monitoring and control of the Digivance
NXD system can be performed from an off-site
location or NOC using an open standard SNMP
interface.
Digivance NXD RAN
The Digivance NXD RAN is an outdoor cabinet
that is either pole-mounted, floor mounted,
or mounted on the side of a building. On the
forward path, the RAN receives the digitized
RF digital link from the hub, separates each
frequency block being transported, and converts
the signal back into RF to be distributed via an
externally mounted antenna. On the reverse
path, the unit digitizes the designated RF bands,
electrically multiplexes the signals onto the digital
RF link for transport over a single-mode fiber to
the hub.