User's Manual
Table Of Contents
- Important Safety Instructions
- Overview
- The ERU assembly
- Do you have everything?
- Safety precautions
- Introduction
- Installing the ERU
- Installation overview
- Installation guidelines and requirements
- Estimating cable requirements
- Assembling the mounting bracket and pipe
- Installing the ERU on solid wood or lap siding
- Installing the ERU on brick or poured concrete
- Installing the ERU on a cinder-block or hollow wall
- Installing the ERU under the eaves
- Installing the ERU on a roof
- Attaching the ERU to the mounting assembly
- Routing and grounding the exterior cables
- Routing cable to the SOMAport
- Troubleshooting

17
Introduction
Safety precautions
In addition to the safety instructions on page 7, follow these guidelines when
installing the ERU:
Carefully survey the job site before beginning the installation to locate secure
handholds, dangerous conditions (such as power lines and weak roofs), and
the safest and most convenient placements for ladders.
Do not climb on a wet or icy roof.
Do not attempt high installations on windy days.
Use only the sturdiest commercial-grade ladders—those with wide, slip-
preventive rungs and bases.
Do not position ladders at an angle steeper than 70
o
. Steeper angles can
cause a ladder to slip sideways.
Dig the base of the ladder into the ground if possible.
Do not place ladders on slate that is wet or hot.
Wear rubber-soled, low-heeled shoes or boots.
Wear a pair of durable but flexible protective gloves whenever they won’t
interfere with the installation process.
Take care not to bump or bang the ERU against anything.
Perform as many installation steps as possible on the ground.
WARNING:
The ERU must not be used indoors. It must be mounted on a
permanent outdoor structure.
WARNING:
Do not connect any third-party devices to the ERU, ERU cable,
or SOMAport F-connector. Damage may occur.
WARNING:
The installer must keep a minimum distance of 25 cm
from the antenna when it is active. The installation should be made to
ensure a minimum of 25 cm separation from all persons who may come in close
proximity to the antenna