User's Manual

2-26
Chapter 2: Installing the ITS 1.4 GHz Core Access Point
Mounting the ITS Remote Antenna Above a Ceiling Tile (Tether Mount)
You can mount the IntelliVue Telemetry System Remote Antenna (RA) above a
ceiling tile without the use of mounting rails if the following conditions are met:
The ceiling tile can support the weight of the RA, 0.32 kg (.7 lbs), and any extra
cabling.
The RA is tethered securely to a permanent structure within the ceiling.
A minimum of 12-gauge galvanized soft annealed mild steel wire conforming to
ASTM A 641 is used to tether the RA chassis to a permanent structure within the
ceiling.
To mount the 1.4 GHz ITS RA above a ceiling tile:
1. Determine which ceiling tile the RA is be mounted onto, and the approximate RA
placement and orientation of the antennas on the tile. Also, check for adequate
clearance above the RA.
2. Remove the ceiling tile to which the RA will be mounted (and also an adjacent
tile to facilitate installation).
3. Orient the antenna(s) on the RA chassis so they bend downward at right angles
to the chassis. Unscrew the collar and rotate the antenna into position and then
retighten the collar to secure the antenna in place.
4. Determine where the two holes for the antennas are going to be located on the
tile and mark the centers of the holes.
Note that the RA antennas can be placed, and oriented in a variety of places to
accommodate positioning the antennas through the tile (e.g., close to a side
wall).
Also, the RA chassis can be rotated 90 degrees. Choose the best placement of
the RA to facilitate where the antennas will go through the ceiling tile. Refer to
Figure 2-16 or Figure 2-17 for the dimensions to locate the antenna holes in the
ceiling tile.
5. Drill out two 3/4-inch (19 mm) diameter holes in the ceiling tile for the
antennas. Lightly coat both plastic grommets with silicone adhesive and insert
them into both holes in the tile (insert grommets from the outside of the tile).
6. Insert the tether wire through the two holes located at the corner of the RA
chassis. The tether wire should have three tight turns of the wire within 1.5
inches of the end of the wire.
7. Connect the other end of the tether wire to a permanent structure within the
ceiling. The tether wire may be attached to any of the following:
wood or metal stud framing
blocking attached to wood or metal framing
plywood adequately attached to wood or metal stud framing, reinforced
concrete, or reinforced masonry
reinforced concrete
reinforced masonry
8. Place the RA across the top of the tile.
DRAFT-3