User Manual

18 APCD-LM047-1.1
3: Installation
3.3.1 Locating the EUM3005
The EUM3005 antenna should be mounted on or near an outside wall or window, pointing in
the direction to the CCU. The higher in the building, the better the signal level will be. So
locating in the attic or second storey is preferred to the main floor or basement.
You can use just the EUM3005 and its antenna to find a good signal, before connecting to the
end-user’s PC. Attach the antenna to the EUM3005, attached the DC cord fro the power
supply to the EUM3005, then connect the power supply to an AC socket. Wait 10 seconds for
the EUM3005 to come up. Then you can use the Radio LED to find a good signal.
Alternatively, connect the user’s PC as described in section 3.2.3, End-Users PC and use the
Setup Menu as described in section 2, Setup Menu to get the figures of merit.
The goal for a good installation is to have the Signal Strength FOM in the range of 5-8 and the
Signal Quality FOM to be in the range 4-5. However, there are many good installations with
lower figures of merit. Using the LEDs or Setup Menu, the installer should find the location that
provides the best signal figures of merit and then adjust the EUM3005 to maximize the FOM
readings. In most cases, a signal strength of 5 with a signal quality of 4 is a better signal that a
signal strength of 6 and signal quality of 2.
The following are suggested guidelines for determining where to locate the modem:
• Survey the area with the modem to assess the signal levels before installing the
antenna
• Signal indicators should be good.
• Locate the EUM3005 at least 8 inches (20 cm) away from occupied areas to avoid any
harm from emissions.
• Try several locations and several orientations and angles near the desired location.
Moving the antenna by as little as 6 inches and swiveling the antenna be as little as 30
degrees can have dramatic effects on the received signal strength and quality.
3.3.2 Mounting and Orienting the EUM3005 Antenna
Once a good location for the antenna has been selected, mount the antenna as required, Use
the drywall plugs and screws if you are attaching the antenna to the wall. Note that the
antenna holding bar has a release tab at one end. It is recommended that this tab be the upper
tab when mounting the holding bar vertically.
When the EUM3005 antenna holding bar has been positioned and attached, the best
orientation of the modem should be determined by trying different angles and seeing which
give the highest signal strength and signal quality.
3.3.3 Connecting the End-User’s PC
There are many ways to connect the EUM3005 to the end-user’s PC, using Ethernet switches,
IP routers, etc. The discussion below is for the simplest, most direct method of connection.