User Manual

4: Installation
APCD-LM048-1.1 25
4.3 Installation Steps
NOTE: Turn off all cordless phones in the customer’s premises, and any
other equipment that uses the 900MHz ISM band. Once the
installation is complete, turn this equipment back on and monitor
for interference or degraded signal quality.
4.3.1 Locating the EUM3006
Based on the site survey by the network operator and experience in the neighborhood, the
installer should have some estimate of the signal levels expected at the end-user’s premises.
This will influence where the EUM3006 can be located. Examples:
• In areas with very strong signal levels, the EUM3006 could be mounted in the attic or
other indoor locations.
• As the signal levels drop, EUM3006 could be located outside, but under the eaves
and/or against building walls.
• If the signal levels are weak, the EUM3006 may need to be located on the roof and
eventually on a pole above the roof that has good line of sight to the CCU.
If you have no idea what signal levels are expected at your site, it is suggested that you climb
to a high point (e.g. on the top of the roof), power up the modem and see what signal level is
available. If it is good (e.g. Signal Strength FOM is 5 or better), then you can try lower
locations. Remember, the higher the signal level, the better the link in general.
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 MDB1000 or Setup Menu, the installer should find the location
that provides the best signal figures of merit and then adjust the EUM3006 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 pole
mounting hardware
• Signal indicators should be good.
• Avoid being the highest point nearby if possible, since this is more exposed to
lightning. If signal levels are good enough, mounting under the eaves or in an attic are
preferred since these locations provide added protection from lightning, winds, rain,
and snow.
• Locate the EUM3006 at least 1 foot away from occupied areas to avoid any harm from
emissions.