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Repeater Commissioning

Downlink gain setting

First the alarm LED only indicates the downlink input power level, here we use color of Alarm LED to adjust the gain of

the repeater. Alarm LED color must remain green. As for the downlink working performance, it is a good working point
that Alarm LED maintains “Green” color with the intention of turning orange; here we refer as “edge point”. At this time,
downlink output power and coverage effect are stable.

And the equipment must be as far as possible away from overloading status of “red” (the equipment would hold
higher interference and depression ability at this stage). So we shall try our best to set the equipment near “edge
point” of green and intention of turning orange during engineering.

Setting of “edge point”:

Switch on the power supply after connection with donor antenna and server antenna, and observe ALARM LED.

• If it shines “orange”, use 1dB as step to reduce the gain until “green” turns on, then increase the gain 1~3dB

attenuation value until “orange” starts to turn on, then brings back 1~2dB till “green” is on, then fix the gain
and the repeater’s downlink output power reaches the perfect status.

• If it shines “green” then:

Please check coverage effect firstly, if the coverage effect is good, the engineering has reached
expecting target, thus there is no need to do anything.

• To check whether the attenuation value has been set, if it is, use 1dB as step to increase gain until the

“orange” turns on, then brings back 1~2dB till “green” is on again , then the repeater’s downlink output power

reaches the perfect status.

• But if attenuation has not been set, it indicates that the input power is not strong enough to let the repeater

reach its good coverage.

If the coverage effect is not good, the donor antenna should be adjusted to get stronger input signal. It is
recommended that one person shall check the coverage effect inside the building when the other person is trying to

adjust the antenna or the repeater. At this stage, please make sure “Orange” color will not be generated by self

oscillation. Please take off the server antenna to check if it is self oscillation or not: if the Orange turns to be green, it
is self oscillation; if it stays as Orange, it is not self oscillation. Please follow steps in other page to turn Orange to be

Green.

Uplink gain setting

Standard: uplink attenuation values =downlink attenuation values

Remark

: Avoid putting more than a 5dB difference between the Uplink and Downlink. And Uplink gain must be equal to or

less than Downlink gain, it can’t be more in order to avoid interference with mobile network.

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

Содержание NS-150

Страница 1: ...WWW MOBILE SIGNAL BOOSTERS SHOP INSTALLATION GUIDE MOBILE SIGNAL BOOSTER Nikrans NS 150 Freq 900 MHz Coverage 1700 ft ...

Страница 2: ...eet security requirements any operation shall be carried out only after turning off power in advance Only the professional is authorized for the operation Do not dismantle machine maintain or replace its components by yourself because this way the equipment may be damaged and you may even get an electric shock Do not open the repeater touch the module of the repeater or open the cover of the modul...

Страница 3: ... Signal strength can also be negatively affected by trees hills buildings weather and other obstructions You may be relatively close to a base station but still unable to make a call This often occurs inside houses offices and other buildings with stucco concrete or metal walls that may block the signal The Signal Booster works with two antennas An Indoor antenna communicates with your cell phone ...

Страница 4: ...e operators for deploying GSM network GSM signal booster is efficient in stabilising your voice connection With this booster you will no longer have to worry about calls that don t go through or are constantly interrupted Some network providers operate at the same frequency of 900 MHz for 3G high speed Internet simultaneously Confirm this with your network operator first and then buy the Nikrans N...

Страница 5: ...age 1700 ft Up link freq 890 915 MHz Down link freq 935 960 MHz Up link Gain 50 dB Down link Gain 55 dB Power supply Input AC90 264V output DC5V 2A Working t C 25 55 Humidity 5 95 Size mm 129 95 30 Booster Weight 0 8 kg dBm 10 dBm ...

Страница 6: ...e band Yaggi is recommended Function To pick up outside signals from the base station and send them by cable to the repeater outdoor antenna also transmits the uplink signals from the repeater back to the base station Indoor Antenna It is mounted inside a building to transmit the improved signals throughout the coverage area Cables Сoaxial cables for indoor and outdoor antennas Mountings Special m...

Страница 7: ......

Страница 8: ...e of the building aiming away from the building which will reduce amount of possible obstacles For your convenience and acceleration of the process perform the testing in pair The mobile phone shall display full bar signals in location where the outdoor antenna is installed Phone calls or data transmission shall be smooth and stable It is recommended to test the signal 3 times in location where an...

Страница 9: ...per isolation measures if they have to be placed on the same cable racks owing to the site condition restrictions 3 Fasten all connection parts of the whole system in correct order from the antenna to repeater interfaces and make sure that the electrical interfaces are well contacted Give waterproof treatment to outdoor connection parts 4 Take lightning protection measures for the antenna and feed...

Страница 10: ...ggi antenna when the area shape is long and narrow corridors long row of houses in two sides tunnels or elevators or rural open space Requirements to indoor antenna installation indoor antenna should be 5 meter distance from an outdoor antenna indoor antenna should be at least 2 meters above the ground indoor antenna should be fixed vertically with the ground ...

Страница 11: ...or smoke or on a cool and ventilated wall to ensure excellent heat dissipation 2 Installation height should be sufficient for RF cable wiring heat dissipation and maintenance 3 Independent and stable power supply is necessary 7 1 2 Power requirement Generally AC 100 264V AC 50 5Hz power supply is required 7 2 Installation Steps 7 2 1 Installation schemes Installation with 1 indoor antenna ...

Страница 12: ...e placed as straight as possible in order not to create any hindrance for signal reception and its transmission 2 Cables should be shortened to the acceptable maximum so that not to waste or decrease mobile signal coverage range 3 In order to prevent water from coming into the mobile phone booster through the cable make a loop in it 4 Keep the outdoor antenna as far as possible from frequency aeri...

Страница 13: ...tics frequency and impedance All accessories shall support the repeater s frequencies For example if the repeater s frequency is GSM900 all the accessories must support the GSM900 frequency 7 3 Repeater Settings 7 3 1 Indicator Light Instructions After power is on check firstly the alarm and power LEDS Status and definition of POWER indicators Status Definition Green Normal Off Power problem Statu...

Страница 14: ...system have two sets of power and alarm LEDS and three system repeaters have three sets of LEDS Each system has own relevant LED and please refer to the correct LED for system performance evaluation Then repeater with plastic closet is designed with LEDS of Alarm LOW and Alarm HIGH When it is used for single system of CDMA800 GSM850 and GSM900 only Alarm Low LED works and Alarm HIGH LED is no use ...

Страница 15: ...dip switches to reduce gain as follows Put ON a pair of switches for a total of 15dB reduction in gain DL1 UL1 Alarm Low For 800MHz or 900 MHz Band DL2 UL2 Alarm High For 1700 1800 1900 2100 MHz Band Remark In single system there is only one system could be set For dual system metal closet Turn ON the dip switches to reduce gain as follows ...

Страница 16: ...ON a pair of switches for a total of 15dB reduction in gain DL1 UL1 Alarm Low For 800MHz or 900 MHz Band DL2 UL2 Alarm High For 1700 1800 1900 2100 MHz Band For triple system metal closet For example F10I GDW Turn ON the dip switches to reduce gain as follows Put ON a pair of switches for a total of 15dB reduction in gain You can reduces anyone system in the products Turn ON the dip switches of GS...

Страница 17: ...has not been set it indicates that the input power is not strong enough to let the repeater reach its good coverage If the coverage effect is not good the donor antenna should be adjusted to get stronger input signal It is recommended that one person shall check the coverage effect inside the building when the other person is trying to adjust the antenna or the repeater At this stage please make s...

Страница 18: ... cell 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 of the outdoor antenna or its installation position or replace it for an antenna with higher gain Check whether it is necessar...

Страница 19: ...asures Firstly check whether the alarm LED lights The light may indicate the isolation is insufficient Secondly adjust the antennas directions or locations or enlarge distance between them Thirdly reduce the repeater s gain by ATT DIP if the above listed methods don t work The following measures can also be helpful Use the roof of the building to enlarge isolation Please try to place the outdoor a...

Страница 20: ... installing the repeater what should I do Check if the repeater s power supply works normally or not 3 If repeater s power supply is normal ALM light is on or flashing all the time what should I do Firstly check whether all connectors are connected well or not If it is all right please adjust the direction of the outdoor and indoor antenna Make sure the horizontal distance is 75 feet or more the v...

Страница 21: ...end all in one solutions covering up to 5000 m2 Depending on the model boosters operate in GSM DCS CDMA LTE or combination of these standards at 850 2100 MHz frequencies The product line is extended with a series of antennas splitters and other accessories for completing exclusive custom projects of any difficulty level Nikrans product development process is rigorously assessed to comply with ISO ...

Страница 22: ...at this signal booster is in compliance with the essential requirements and other relevant provisions of Radio Equipment Directive RED 2014 53 UE CE marking info mobile signal boosters shop 448000698689 Sales www mobile signal boosters shop ...

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