Nikrans NS350-GSM+4G, Руководство по установке

Страница: 18 / 22

Questions & Solutions
What 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 b05 and +15 dBm. Device Gain must be 65/65 dB. If the BS is lower than - 65dBm, the coverage will be
smaller. However, the device can work normally. If the BS is too weak, it'll be necessary to adjust the position of the outdoor
antenna by raising it as high as possible (on a pole on the rooftop) and pointing it towards the provider's nearest base station. If
the BS is higher than - 50 dBm, the device will have a self-excitation issue. In those conditions, the output signal will drop during
communications. If the two antennas are placed very close to each other, it will evoke self-excitation. To fix the problem, you
would need to place the outdoor antenna at the largest possible distance from the indoor antenna.
System Test
Check whether the coverage is good
1. Take a test with a mobile phone or a data card (engineering mobile phone is preferred). 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 of the 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; also check
whether the repeater’s power is enough; please install extra indoor antennas or replace the repeater for 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 location to 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.