Nikrans NS-150-Multi Installation Manual

Also see for NS-150-Multi: Quick start guide

input power level) when the system detects signal oscillation in the working band or the input signal is beyond a safelimit.The repeater also features a Network Safe / MUTE feature that automatically shuts off the repeater to protect thecellular 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 (outputpower) readings must be between +05 and +15 dBm. Device Gain must be 65/65 dB. If the BS is lower than - 65dBm, thecoverage will be smaller. However, the device can work normally. If the BS is too weak, it'll be necessary to adjust theposition of the outdoor antenna by raising it as high as possible (on a pole on the rooftop) and pointing it towards theprovider's nearest base station. If the BS is higher than - 50 dBm, the device will have a self-excitation issue. In thoseconditions, the output signal will drop during communications. If the two antennas are placed very close to eachother, it will evoke self-excitation. To fix the problem, you would need to place the outdoor antenna at the largestpossible distance from the indoor antenna.7.4. System Test7.4.1. Check whether the coverage is good1. Take a test with a mobile phone or a data card (engineering mobile phone is preferred).To test signal level with a cell phone, make use of its engineering mode (Field Test Mode), which is anapplication available in free access or a phone mode requiring no extra setups. On most used mobile OS(operating systems) the test mode can be started as follows:◦ iOS. Type *3001#12345#* and hit Call◦ Android. Type *#*#197328640#*#* to activate◦ Windows. Type ##3282# and start.◦ Blackberry. Press TOOLS, SETTINGS, STATUS or OPTIONS, STATUS.Note! To get parameters for 2G, 3G and LTE, disable WiFi. In case you cannot find Field Test Mode on yourcell phone, use bars on the screen of your mobile phone to evaluate the change.If the signals in most areas have not been improved, please check recommendations below again:- Weak input signal leads to low output power. To increase input signal power level, change the direction ofthe outdoor antenna 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; alsocheck whether the repeater’s power is enough; please install extra indoor antennas or replace the repeaterfor another model with 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 locationto improve coverage.- 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.