What is a Cellular Repeater Amplifier?
A cellular repeater or wireless cellular amplifier is a type of cellular amplifier. A cellular repeater works by bringing a cellular signal through a antenna on the outside of your building to an amplifier then to an inside broadcast antenna to a place where there is no signal or the signal is very faint. Amplification devices allow users to get clear calls in areas that might have been cellular dead zones without them.
How do I know which Amplifier to use?
To determine which amplifier to use, one needs to know the frequency band of your cellular provider, your outside signal strength how strong or how weak, and the characteristics of the facility that requires coverage. Characteristics include, square footage (how much area do you want to cover), how many floors, what is the building made of (wood structure, cinder block, steel siding, metal roof), and internal walls, shelves (anything that will block signal). These are some of the main things that will help us determine which amplifier to choose.
How much area will a amplifier cover?
There is not a set, fixed answer to this question. If you have a good strong signal outside this is the easy one to fix. We just need to bring the good signal from outside into the building. If we use one of our small building systems SOHO you can expect up to 5000 square feet of coverage. The 50dB systems 1000-2000 square feet and the 62dB up to 5000 square feet. Larger systems (65 & 68dB) can cover up to 50,000 square feet.
(These guidelines are based upon an 800MHz amplifier, 1900MHz results are a bit less.)
That sounds great but what if I have a weak signal?
This usually means that your building is on the edge of the cell coverage area or
being blocked from the cell tower by some physical obstacle such as a hill or
building. This can be a problem, but sometimes it can be solved.
I always tell people if you multiply anything by 0 you still have 0. So the question is:
Do you have enough signal to work with? A poor or weak signal can be enhanced, but the inside coverage will be affected.
If the signal is too weak you may have to go to a cellular booster (wired).
Why do I have to have separation between antennas?
If you don’t have proper separation between antennas your amplifier will oscillate. What is oscillation you ask? Oscillation is when the outside antenna hears the amplified signal from the indoor antenna or the indoor antenna hears the amplified signal from the outside antenna. This event is similar to microphone/speaker feedback in audio.
Typical recommended separation is:
50dB 45’-50’
60dB 70’-75’
65dB 80’+
Many things can figure into separation distances (steel siding, metal roof, or weak signal).
But it is always best to go with the recommended separation distances.
Conclusion
Always remember the first thing you need to know is what is your signal strength outside your building. Then the frequency of the carrier, check out our link for frequency lookup.
How much area are you wanting to cover (what is your square feet). One last thing to know, a 800MHz amplifier will cover a lot more area then a 1900MHz. Once you have this info you can give us a call at 877-467-4241 and we will be happy to help with your selection.
These are some of the main things that will help us determine which amplifier to choose. highend
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