Nikrans NS550-GSM+4G Installation Manual

ANTENNAS AND CABLES SETTING UPOutdoor antenna installationThe repeater’s main function is to improve weak RF signals in an area. The formula is: Input power + Gain= Output power. Thesignal strength from an outdoor antenna directly affects the efficiency of the indoor coverage. It is very important to choose thecorrect outdoor antenna location in order to get the best signal.• Testing signal strength received by an outdoor antenna using a mobile phone:The mobile phone shall display full bar signals in location where the outdoor antenna is installedPhone calls or data transmission shall be smooth and stable. It is recommended to test the signal 3 times in locationwhere an outdoor antenna is to be installedAs shown from the illustration above, you should test the signals in points from A to E, and select a best place thatdisplays full bar signals.• Outdoor antenna installation Requirements:Outdoor antenna should be installed on the roof of the house or in some other place where your mobile device is withincoverage zone. Mobile signal should be as strong that at least three-four bars are indicated on your phone display.Outdoor antenna should be fixed in straightly.It is necessary to waterproof connectors of the outdoor antenna and feeder lines.Repeater is a two-way signal amplifier. So proper isolation between outdoor antenna and indoor antenna is necessaryin order to avoid self-oscillation. A perfect example of self-oscillation is when you take a MIC and a loudspeaker forexample; if they are too close to each other, it could cause big noise.If isolation can’t be achieved due to limited distance, the roof of the building, walls or any other barriers can be usedbetween antennas to increase isolation.Installation of a panel antenna as an outdoor antenna