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Dali Matrix PS System Installation and Commissioning Guide
Dali Wireless Proprietary and Confidential | DW-MAN-036 Rev 06
1.4
airHost PS Off-Air Host Unit
The airHost PS is a dual or quad-band off-air fed host unit. The airHost PS accepts DL
analog RF signals from off-air donor antennas and transmits UL RF signals back to the
macro towers at 2 W or 5 W depending on the number of bands.
The dual band unit supports one or two bands in a sealed type 1 pluggable module chassis.
The quad-band unit supports up to four bands in a type 2 sealed chassis with door.
Figure 1-3: airHost PS Dual Band and Quad Band Off-Air Host Unit
On the DL path, the airHost PS translates analog RF content into a digital data stream, and
then transports the data stream to remote units on one to eight optical links, each operating
at 10 Gbps. Because radio signals are processed and combined in the digital domain, no
passive intermodulation (PIM) is introduced.
On the UL path the airHost PS does the reverse. It receives data streams from the remotes,
which are then converted back to analog RF. The signals are filtered and amplified to a
composite power of 2 W per band, and then delivered back to the macro towers through
outdoor directional antennas. For single channel frequency bands, airHost PS supports up
to 5 W output power, type 2 chassis only.
The airHost PS also supports 1 Gbps Ethernet backhaul for transporting the data from IP
devices such as security cameras and Wi-Fi access points located close to remote units.