Amplitec C20M-5B Signal Repeater User Manual

Amplitec C20M-5B Signal Repeater User Manual

The power supply voltage of repeater should meet the standards of security requirements| Ensure of grounding, waterproof and lightning protection when installing the repeater
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The repeater should be installed and started by professionals| Do not open the repeater, maintain or replace the components
Keep the repeater away from heat source, do not install in a narrow

space

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Package Contents

Product Description

C20M series five band repeater is a mobile signal repeater with high intelligence. It adopts digital ALC and anti-interference technology, which can detect the signal quality in the coverage area in real time and auto adjust the working status accordingly.

The signal repeater can automatically attenuate the gain of uplink and downlink, according to the detected signal intensity and also when there is insufficient isolation between inside and outside antenna, to avoid self- oscillation. When there is no mobile users in the coverage area, the device will auto shut off uplink, to save power consumption and decrease the interference to the base station.

This signal repeater series are well suited in South America and Europe, available to amplify 2G 3G 4G or 5G networks of several mobile operators. With features like elegant appearance, compact size and easy to install and maintain, it has an output power of 20dBm which enables the device to cover an area of up to 500 ㎡ with proper installation. That makes it an excellent option to solve weak signal problems of house, office, elevator, basement, etc.

Product Features

• LCD screen to display device’s operating parameters clearly, button control make it easier to operate the device；
• Available to support several mobile operators’ networks simultaneously；
• Low power consumption, low interference；
• Manual gain control, with 1dB step to attenuate the gain among the range of 31dB；
• Digital ALC technology, auto limit the output power to ensure stable signal coverage；
• Anti-interference technology, auto detect the isolation in real time. When isolation is insufficient, device will auto attenuate the gain, to avoid self-oscillation occurs to interfere the base station
• Uplink dormant function, when no mobile users in the coverage area, device will shut off uplink output, to save power consumption and not interfere the base station.

Connector Description

• A ： Outside antenna connection port(N-female)
• B ： Inside antenna connection port(N-female)
• C ： 12V DC power connection port
• D ： Power switch
• E ： Grounding screws
• F ： LCD display screen
• G ： Menu Button
• H ： Select and confirm button
• I ： Value increase button
• J ： Value decrease button
• K ： Working status indicator

Operation and Display Description

1. Function Buttons on the Control Panel
   MENU ：Main Menu
   SET： To select and confirm the operation INC+：To increase the value
   DEC-：To decline the value

2. Screen Display and Screen lock
   After power-on and starting running, the main menu interface of the display screen shows the corresponding downlink frequency and gain of the working frequency band and the downlink input and output power (Figure 1) (the following operation instructions are for reference only, the specific frequency and gain are subject to the device) ；Long press “MENU” for 5 seconds

• press “INC+” key to enter the lock screen (Figure 2), single-pressing the key is invalid. The device is working normally but the display screen does not display, then long press “MENU” for 5 seconds + press “INC+” key after unlocking the screen, you can operate and display normally after unlocking the screen (Figure 1).
  

  3. Gain Attenuation Setting
     Press “MENU” and select the band needed to adjust ； Press“SET” 3 seconds until“Gain:DLxxdB”flashing(Figure 3) ，Press “SET” once more to specific setting of the uplink or downlink , then press “INC+” or “DEC-” to attenuate the gain(Figure 4 and 5). When the setting is finished and press “MENU” button to return to homepage.
     

  4. Uplink Auto shut-off function
     When there is no active users in the coverage area, the uplink will shut-off automatically.“Run” flashing(Figure 6).

  5. Check real-time gain and power
     Press the ‘MENU’ button to view the real-time gain (Gain) and input (Rssi) output power of the corresponding system(Figure 7).

  6. Self-oscillation Elimination and Auto Shutoff Function
     The device will auto detect the isolation in real time. When there is insufficient isolation between outside and inside antenna, the device will auto attenuate the gain to make it work normally(Figure 8,the “run” indicator is in orange ). When severe insufficient isolation occurs, the “run” indicator is in RED (Figure 9). Then the device will be turned off, the direction and height of the antennas should be adjusted until there is sufficient isolation for device’s normal working.
     

Technical Specification

758~803/869~894/1805~1880/2110~2170/2620~2690
C20M-5B2| 703~748/824~849/1710~1755/1850~1910/2500~2570| 758~803/869~894/2110~2155/1930~1990/2620~2690
C20M-5B3| 832~862/880~915/1710~1785/1920~1980/2500~2570| 791~821/925~960/1805~1880/2110~2170/2620~2690
C20M-5B4| 703~748/880~915/1710~1785/1920~1980/2500~2570| 758~803/925~960/1805~1880/2110~2170/2620~2690
Item| Uplink| Downlink
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Gain| 70±2 dB| 75±2 dB
VSWR| ≤2| ≤2
Output Power| 15 ± 2 dBm| 20 ± 2 dBm
ALC Active 10 dB| ∣△∣≤2 dB| ∣△∣≤2 dB
Max. Input Power Without Damage| -10 dBm| -10 dBm
Intermediation                9 KHz~1 GHz| ≤-36 dBm| ≤-40 dBc
Products(CW)            1 GHz~12.75 GHz| ≤-30 dBm| ≤-40 dBc

Installation Guides

Installation Requirements

1. With stable and independent power supply.
2. No corrosive gas, smoke or liquid leakage.
3. Sun block and cool for device’s safe running.
4. Easy for cabling and dissipation, safe and easy for maintenance.
5. Waterproof and under thunder protection.

Installation Tools

interface, self-provided

Installation Steps

The repeater should be installed on a solid and hard plane. The installation steps are as follows:

1. Find a suitable site according to the installation requirements and dimension of repeater.

2. Drill 4 holes with the percussion drill according to the installation holes. Sizes are 7mm.
   The expected sites of the holes are as the following diagram.
   

3. Put the expansion pipes(size: 8mm) into the 4 drilled holes.

4. Align the fixing holes of the repeater with corresponding holes on the wall, and drive 4 M6*40 screws into the expansion plugs with screwdriver and fasten the repeater firmly.
   

Antenna Connection

Take suitable outside antenna and inside antenna according to the characteristic of the coverage area. Installation and connection of the antennas should follow the requirements as following:

1. The outside antenna should be installed at the place with the strongest signal and towards BTS.
2. The length of the cable, which connects the outside antenna and the repeater, should be less than 20 meters.
3. Wrap the waterproof tape around the connection part of the outside antenna and outdoor cable, in case of oxidization or corrosion.
4. The indoor antenna should be placed 5m above lower than the outside antenna, with its direction not towards the outside antenna.
5. It will be better if there can be a wall between outside and inside antennas.
6. Outside antenna should connect to BTS port of the repeater while inside antenna to the MS port.

Starting

1. If possible, please connect the grounding screws of the repeater and grounding of the electrified wire with cable.
2. Make sure the feeder cables between repeater and antennas are firmly connected.
3. Connect the DC plug of the 12V/3A power adapter to the DC+12V port of the repeater. Then put AC plug connecting to the nearby 220V power outlet.
4. Check if repeater can work normally or not, by checking the operation parameters on the screen, according to the guides of the previous “Operation and Display Description” part.
5. Test signal intensity and dialing quality with mobile phone in the repeater coverage area.

Maintenance and Repairing

Frequently Ask Questions and Solutions

Disconnected to power source

| Check the power adapter and power outlet, and reconnect it

“Run” Indicator Red

| ****

Isolation between outside antenna and inside antenna is insufficient

| Change the distance & direction of outside & inside antenna, until

I.S.O is not flashing

Everything is okay after power-on, but no improvement in signal

| ****

The network of SIM card does not comply with that of signal repeater

| ****

Replace SIM card or repeater

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The inside antenna is not successfully connected| Fasten the connection of inside cable and connectors
The inside antenna is damaged| Replace the inside antenna

Effectiveness of the repeater degrades after working for a while

| The outdoor antenna is damaged| Replace the outside antenna
The outside antenna get loose and is not towards the BTS| Change the direction of outside antenna and fasten it
Feeder is damaged| Replace the feeder

Notes
Power-off is recommended in the following situations.

• Power supply is abnormal.
• Liquid flows into the device or too close to the fire.
• Working conditions are abnormal such as overheating, strange smell or foreign matters.

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