Nikrans NS-500GD Installation Manual

Also see for NS-500GD: Installation guide Manual

the system detects signal oscillation in the working band or the input signal is beyond a safe limit.The repeater also features a Network Safe / MUTE feature that automatically shuts off the repeater to protect the cellular network.Users shall make sure the LED remains green at all times for optimum system performance.Questions & SolutionsWhat signal level in dBm is optimal for the correct booster functioning?For the optimal functioning of the booster, the BS (input) readings should be between - 65 and 50 dBm. The MS (output power)readings must be between +05 and +15 dBm. Device Gain must be 65/65 dB. If the BS is lower than - 65dBm, the coverage will besmaller. However, the device can work normally. If the BS is too weak, it'll be necessary to adjust the position of the outdoorantenna by raising it as high as possible (on a pole on the rooftop) and pointing it towards the provider's nearest base station. Ifthe BS is higher than - 50 dBm, the device will have a self-excitation issue. In those conditions, the output signal will drop duringcommunications. If the two antennas are placed very close to each other, it will evoke self-excitation. To fix the problem, youwould need to place the outdoor antenna at the largest possible distance from the indoor antenna.System TestCheck whether the coverage is good1. Take a test with a mobile phone or a data card (engineering mobile phone is preferred). If the signals in most areas havenot been improved, please check recommendations below again:- Weak input signal leads to low output power. To increase input signal power level, change the direction of the outdoorantenna or its installation position or replace it for an antenna with higher gain.- Check whether it is necessary to use additional indoor antennas as barriers block signal penetration; also checkwhether the repeater’s power is enough; please install extra indoor antennas or replace the repeater for another modelwith higher power level.2. If the signals in small parts of the area have not been improved, please check the following:- Check whether the indoor antenna is installed correctly or not; you may try to change the antenna location to improvecoverage.- Check if it is necessary to adjust the direction of the indoor antenna.- Check whether it is necessary to add one or more antennas to enhance the coverage in special areas.