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Wireless DAS Introduction

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1. WIRELESS DAS OVERVIEW

Wireless dual band (GSM900+WCDAM2100) DAS which support one master unit connect over four remote unit is to solve the blind spot design of mobile phone coverage of more than 1500 square meters; the solution is to use a master device (near-end machine) to introduce signals through the antenna, and distribute signals to the other four remote units through one extension unit. The proximal unit is connected by cables, and the entire system is supplied with only one power adapter. The remote device can adapt to environmental changes, automatically control the device to reduce gain, adjust output power, and achieve adaptive control.

1.1 Anti-self-excitation function

During the installation of the device, the isolation of the antenna is automatically detected. If the installation requirements of the system are not met, the automatic control of the device reduces the gain, protects the device and the network is not disturbed. After the device is installed, the isolation is automatically detected in real time, and the gain is adjusted according to the change to ensure that no self-excitation occurs, and network interference caused by abnormal operation of the device due to changes in the installation environment is avoided.

1.2 Device gain is automatically adjustable

The mobile partner has an active ALC function and a microprocessor-controlled gain digital attenuator. The gain dynamic automatic adjustment ensures high reliability and high stability of the system.

1.3 Uplink and downlink automatic linkage commission

After the system is powered on, the system will automatically detect the input power and control the output power. After calculating the downlink gain of the system, it will automatically adjust the system’s uplink gain, maintain the system’s amplification balance, and realize the device’s uplink and downlink automatic linkage debugging. The gain of the control system is less than the path attenuation of the signal, ensuring that the micro-power repeater does not have any interference noise to the network, ensuring that one base station can carry more mobile phone partners.

1.4 Easy installation, compact structure

With perfect working status indication, different working status can be displayed, and adaptive control can be realized, which makes product engineering installation more convenient and can be installed without the cooperation of instruments. The equipment is small in size, no need to rent a house, reduce the coordination of the property, and reduce the cost of use.

1.5 Remote power supply

The entire system consists of one host and four remote units. Five devices only need one adapter to supply power for remote power supply. The signal line and the power supply line are combined into one, eliminating the need for wiring and finding a suitable power supply. Adapt to different installations.

1.6 Low Power Consumption

The equipment has low power, small volume and energy saving. The signal emitted by the device is only the megawatt level, no electromagnetic pollution, and will not bring any health hazards to people. It is a low carbon green product.

1.7 Remote monitoring function (optional)

In addition to monitoring the working status of the micro-chamber, the near-end machine can monitor each remote coverage unit and display it in real time. At the same time, it conforms to the China Unicom Repeater Integrated Network Monitoring and Management Protocol specification and can access the Unicom Repeater Integrated Management Platform for alarm monitoring. 2.Appearance and Operation Interface

Master Unite (Access Unit)
Dimension(L*W*H):198*138*36.5mm
Weight:1.2Kg
Extension Unit
Dimension(L*W*H): 71*86*21mm
Weight:0.2Kg

Remote Unite (Slave Unit)
Dimension(L*W*H):198*138*36.5mm
Weight:1.2Kg

Operation Panel Indicators and Button Descriptions

Master and Remote Unit Apperance
Master Unit and Remote Unit Operation Interface
Other instructions:
SYS1- indicates system 1 (generally set to GSM900 band according to factory settings)
SYS2- indicates system 2 (generally set to WCDMA2100 band according to factory settings)
OP1, ISO1, and AGC1 indicate the System 1
OP2, ISO2, and AGC2 indicate system 2
The signal strength LED light grid number also shows the signal strength and operating status of systems.


Indicator

Statues

Description

OP Indicator

RED

System overpower alarm

GREEN

The system is working properly

AGC Alarm indicator (automatic power control indicator for the downlink working link)

GREEN

Low output power, AGC function is not activated

ORANGE

Low output power, AGC function is not activated

RED

Indicates that the ALC starts to control more than 10dB, and the downlink signal input power is very strong.

Power indicator

GREEN

Normarl

SLAKE

Electricity Failure

SMART LED Indicator

GREEN

Working in the intelligent mode state. At this time, the uplink and downlink gain adjustments can be automatically performed according to the received signal strength of the base station, and no manual condition is required. (recommended mode)

SLAKE

Working in a normal state, you can manually adjust the device’s uplink and downlink gains manually

More details Please downlown the Wireless DATA Sheet:Wireless DAS Data SheetDownload

If reprint, pls notify from:Stone Liu Blog » Wireless DAS Introduction

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