User's Manual

6 Hub Installation Checklist – 6x60-degree
The Arcwave’s AR1255 Hub Outdoor Transceiver is intended for professional
installation only. Nothing is this manual supercedes local regulations.
6.1 ARCell Hub Outdoor Transceiver
1. Attach IF cables (upstream and downstream) to receiver and transmitter
2. Attach DC power cable to receiver and transmitter.
3. Dress power and IF cables with UV-rated tie wraps and pass them through the cable
grommet at bottom of rear weather cap.
4. Install rear weather cap mounting screws.
5. Attach Hub Transceiver to vertical mounting pipe with at least 44 inches clear of
unrelated hardware or other impediments. Pipe diameter to be between 1.5 and 2.25
inches, inclusive.
6. Adjust the nuts on the 5/16” threaded mounting bolts such that the antenna is oriented
per system designer’s specifications. Generally, a single Hub Transceiver is pointed
centered on the population to be served, and multiple Hub Transceivers are oriented 60
degrees apart horizontally. Vertical orientation should generally be vertical, i.e., no
downtilt.
7. Attach a properly terminated (minimum) #6 copper cable to the ¼-20 ground bolt on the
bottom flange of the Hub Transceiver. Connect by shortest path to clean and solid
ground on mounting structure (tower steel, building frame, etc.). If the mounting
structure is not well grounded the #6 copper cable must be routed to a suitable buried
ground rod and/or building electrode.
8. Route the IF and DC power cables from the Hub Transceivers to the Outdoor Junction
Box (OJB) – if employed in the particular installation - or directly to the base station
equipment room. Utilize appropriate mounting hardware and/or UV-rated tie-wraps.
6.2 Outdoor Junction Box (OJB) – If Employed
1. An OJB can simplify installation and system maintenance if several Arcwave Hub
Transceivers are installed at a common site and there is an accessible location for
mounting the OJB enclosure. The OJB can serve as a junction and distribution point for
any or all of:
a. DC power wiring and distribution to individual Hub Transceivers. A fuse block to
allow protection and isolation of individual Arcwave Hub Transceivers is
recommended. The OJB can contain a voltage regulator to allow a higher DC
voltage to be run from the equipment room and then regulated at the OJB to 8.0
– 8.5 volts DC as required by the Hub Transceivers.
b. Common ground bus.
c. IF splitters. In some installations a single downstream IF signal is to be routed to
several ARCell Hub Transceivers. The 75-Ohm passive splitter(s) can be
located in the OJB.
d. For more information see the section Installation Detail – Outdoor Junction Box.
2. Ground the OJB enclosure and common ground bus with a properly terminated
(minimum) #6 copper cable by the shortest path to clean and solid ground on mounting
structure (tower steel, building frame, etc.).
June 2003 Page 6-1