CEL-FI GO X Installation Manual page 3

01
Isolation
Understanding "isolation" is critical to installing your GO X correctly.
Isolation is a measure of separation between the Indoor and Outdoor antennas.
The Cel-Fi GO X automatically throttles its gain (amplification) up or down to avoid
"oscillation." Oscillation is a type of feedback that occurs if the gain of the amplifier is higher
than the isolation.
The more isolation between the donor and server antenna you have, the more the GO X will
be able to amplify your signal, and the better your signal inside the building.
Isolation is increased when:
1
You increase the horizontal or vertical distance between the indoor and outdoor
antennas.
2
You position the antennas so there is more building materials separating them.
3
You point the indoor and outdoor antennas away from each other.
For best performance, we recommend at least 50 feet of separation between the indoor and
outdoor antennas, or at least 30 feet and two layers of building materials.
Please note that these are just guidelines. Often you'll need to compromise isolation in
order to get the best signal quality or to cover the entire building with signal from the indoor
antennas.
Once your GO X is installed and operational, you can check isolation by looking at the "Echo
Gain" values in the Advanced tab of the Wave app. See the "Advanced Tab" section near the
end of this document for more information.
If you're having any problems, please reach out to us, we'll be happy to walk you through
optimizing the installation to make sure you're getting the absolute best results.
4
Example of Poor Isolation
Example of Good Isolation
02
Amplifier Install Location
If you have weak outdoor signal (1 bar, or less than -100 dBm RSRP signal), it's best to install
the GO X as near to the donor antenna as possible and cut and crimp the cable to reduce
the cable length. Of course, you should make sure the donor antenna is outdoors and the
GO X is indoors.
Here's why: If your signal is weak to begin with, it will become even weaker (attenuate) as
it passes through a longer length of cable. The signal may be unusable by the time it gets
to to the GO X. If the outdoor signal is strong, the GO X's location doesn't matter.
A shorter cable run will mean that the signal is strong enough for the GO X to recognize
and boost it.
Not enough vertical separation
between outdoor and indoor antenna.
Not enough horizontal separation
between outdoor and indoor antenna.
Not enough building materials
between indoor and outdoor antenna
Good vertical separation.
Outdoor antenna pointing away from
indoor antenna.
Multiple layers of building materials
etween antennas.
Outdoor antenna pointing away from
indoor antenna.
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