JDTECK wcb series User Manual

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Meaning

Automatic Gain Control Base Transmitting Station (Cell Tower) Code Division Multiple Access Decibel – (A unit of measure for signal strength) Downlink (Communication channel from cell tower to mobile device) Outdoor Antenna (Antenna that donates an input signal) Global System for Mobile Communications Integrated Digital Enhanced Network Liquid Crystal Display Light Emitting Diode Long Term Evolution Mobile Station Personal Communication System Radio Frequency Uplink (Communication channel from mobile device to cell tower)

AGC BTS CDMA dB DL Donor GSM iDEN LCD LED LTE MS PCS RF UL

Abbreviations…………………………………………..………………………………..2 Safety……………………………………………………………………….……………….2

1. Introduction …………………………………………………...……………………..3

2. Features & Functions ………………………………….……………………….4

3. Installation Procedure……………………………………….....………………6

4. LED Operation Status………………..…………………………………………7

5. Trouble Shooting………………………………………………..…….…..………8 Specifications……………………………………………………………………..…….9 FCC Statement………………………………………………………...……….……10

Terminology

User Warnings – MUST READ!

1. This amplifier must ONLY be used for the purpose it was intended for. Making any alternations to the design layout without first consulting with a trained technician can result in interference to the operator’s network and liability by the end user.

2. Please read this entire manual carefully before using this product!

3. Only the power supply that came with the amplifier should be used at all times. It is highly recommended that the repeater is grounded and lightning protection used.

4. Do not attempt to open any part of the amplifier. This will void the warranty and can cause an electric shock. Electrostatic can also cause damage to the internal components.

5. Please keep away from any heating-equipment, because the

amplifier will dissipate heat when working. Do not cover the amplifier with anything that influences heat-dissipation.

6. Do not place or mount the amplifier in a location that is exposed to the elements. This will void the warranty and can cause an electric shock.

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1. Introduction

The WCB Series Pre-amplifier from JDTECK was designed to work in tandem with a cellular repeater for applications where the donor signal reaching the cellular repeater is very weak. This results in poor system performance and a reduced coverage area.

Poor input signal can be the result of distance from the cell tower, obstructions affecting a good line of sight to the cell tower or an excessively long coaxial cable coming from the donor antenna. Using a pre-amplifier will help eliminate the effects of this problem by first filtering and then amplifying the signal before it gets into the cellular repeater.

The WCB Series Pre-Amplifier is designed to be installed between the donor antenna and the cellular repeater.

Another benefit of the WCB Series pre-amplifier is that it can help to increase the uplink power level of the repeater going back to the BTS or cell tower. This helps improve the stability of the signal and also reduces call drops when deployed very far from a cell tower.

The WCB Series Pre-amplifier is also equipped with an alarm monitoring feature. This circuit monitors the uplink gain of the repeater when coupled with the pre-amp to ensure it operates within safe limits. There is also an automatic gain control feature on the pre-amplifier which allows it to adjust to the environment automatically.

The pre-amplifier is supplied with N type female input / output RF connectors and is available in a 35dB gain or 15dB gain model. An optional model with SMA type female connectors is also available.

2. Features & Functions

 Sleek attractive housing  LED indicators to monitor environmental status  Supports all technologies including, GPRS, HSDPA, UMTS & LTE  Low power consumption  ALC function. (Auto Limit Control)  AGC function. (Automatic Gain Control)  Heat Sink cooling fins to dissipate heat quickly and efficiently

DC Power Plug

Outdoor Port

Power LED

Low Alarm

High Alarm

Heat Sink Fins

Indoor Port

Dome Ant.

Repeater

Pre-amp

Donor Ant.

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2. Features & Functions – Cont.

3. Installation Procedure

The WCB Series pre-amplifier must be installed between the donor antenna and the cellular repeater. Do not install on the indoor side of the repeater.

Installing this amplifier in a temperature controlled environment or any location where there is good ventilation free of moisture or any other heat source is recommended. An AC power source will be required to power the unit. The location you choose for the amplifier should allow you to easily monitor the active LED’s on the side panel.

1. Align pre-amplifier to the position you have selected for it. Double check

your distance between the pre-amplifier and the repeater to ensure your jumper cable mating these two devices is long enough.

2. Mark the position, drill holes for the mounting screws and affix in position.

3. Connect RF cables and power cables to the pre-amplifier respectively.

The donor antenna coax must connect with the “Outdoor” port of the pre-amplifier, whereas the “Indoor” port of the pre-amplifier must connect with the “Outdoor” port of the repeater.

4. After installing the pre-amplifier as described as above, power on the pre-

amplifier and cellular repeater to check the LED operation status.

RF Port

Mounting Slot

(Optional SMA Model Type)

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3. Installation ~ Cont.

4. LED Operation Status

There are 3 LED’s located on the side panel of the pre-amplifier. One is for the Power LED and two are for the Alarm LED’s. (Dual Band Model) For triple band line amplifiers, there are 4 LED’s.

If the alarm status is RED that means the uplink power of the system is too high. To adjust this, you need to attenuate the uplink gain of the cellular repeater in 2dB increments till the LED turns green.

If the alarm status on the repeater is RED or Amber, you will need to attenuate the downlink gain of the repeater to get the alarm to go green.

After you have made any adjustments, please monitor the alarm LED for a minute or so to ensure the alarm status is a steady green and not flickering to RED. If it is flickering, then you need to add more attenuation.

Note: If the pre-amplifier is switched off while connected to the

repeater, it will not pass the RF signal coming from the donor antenna.

5. Troubleshooting

Q1. Why is there still no signal after installing the equipment?

Answer:

1. Check the power source of the amplifier and repeater.

2. Check the connector of outdoor antenna is tight or not.

3. Check the connectors of RF cable are tight or not.

4. Check the outdoor signal is strong enough or not.

5. Check to make sure the antenna is installed correctly.

6. Check the connector of indoor antenna is tight or not.

7. Check the cable type is suitable or not.

Q2. Why the signal strength is too weak on the edge of area?

Answer:

1. Check the outdoor signal and antenna direction.

2. Check repeater is full gain or not.

3. Check all of the connectors are tight.

4. Change the location of outdoor/indoor antenna.

5. Check the cable type is suitable or not.

6. Deploy more indoor antennas.

Q3. Why can’t I make a call after installation, even though I can

detect a signal?

Answer:

1. Check LED status of repeater to make sure alarms are green.

2. Change the location of outdoor / indoor antenna.

3. Reduce the UL gain of the repeater.

Q4. The signal is not stable after turning on the system.

Answer:

1. Check to see if the outdoor signal is stable or not.

2. Check the location of the donor antenna. Too close to other antennas.

3. Check the RF cable is broken or not and has no coils.

4. Confirm direction of donor antenna in relation to cell tower.

Q5. Why is the LED on the front of the repeater not lit?

Answer:

1. Check the power source is normal or not.

2. MUTE feature is active. Attenuate gain of repeater and cycle power.

Donor Signal

Outdoor Port

Indoor Port

Outdoor Port

To Indoor Ant.

Indoor Port

(Signal Flow Path)

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Mechanical Specifications

Input / Output Port

N-Female

Impedance

50 Ω

Dimensions (W x D x H)

135 x 125 x 36mm

Weight

≤0.7Kg (1.5 Lbs)

Operating Temperature

-10°C ~ 50°C

Environment Conditions

IP40

Switching Adapter

Input AC 90~265V, Output DC 9V / 3A

Power Consumption

12 Watts

NOTES

_________________________________________________________________________________

FCC Statement

PLEASE NOTE: It is normal for your repeater to be quite warm while in use. This device complies with part 15 of the FCC Rules. Operations subject to

the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

FCC Radiation Exposure Statement:

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment . This equipment should be installed and operated with minimum distance 20cm between the radiator& your body. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Frequency Specifications

Model

WCB-819

FCC ID

SQXWCB-819

Filter Bandwidth

GSM & CDMA 25MHz | PCS 60MHz

DCS 75MHz | WCDMA 60MHz | LTE 11Mhz

Output power

Downlink

Uplink

≥0dBm

≥20dBm

Max. Gain

≥35dB

Noise

≥7dB

AGC Range

≥10dB

V.S.W.R

≤2.8

Group Delay

≥ 1.5μs

Frequency Stability

≤0.01ppm

LED Alarm Status

Standard

Power LED

Power Indicator

ALC LED

Orange @ ALC 1~5dB, Red @ ALC 15dB~20dB

Model Specifications

Classification

Bandwidth Range (MHz)

A. Frequency Range

CDMA / TDMA / AMPS / GSM 850 PCS / CDMA / GSM / GPRS 800 / 1900Mhz

DL - 869-894 / 1930-1990 UL - 824-849 / 1850-1910

B. Frequency Range (GSM / DCS) 900 / 1800Mhz

DL - 935-960 / 1805-1880 UL - 890-915 / 1710-1785

C. Frequency Range (GSM / WCDMA / UMTS) 900 / 2100Mhz

DL - 935-960 / 2110-2170 UL - 890-915 / 1920-1980

D. Frequency Range CDMA / TDMA / PCS / CDMA / GSM / GPRS / AWS 1900 / 1721Mhz

DL - 1930-1990 / 2110-2155

UL - 1850-1910 / 1710-1755

E. Frequency Range AWS

1700 / 2100Mhz

DL - 2110-2155

UL - 1710-1755

F. Frequency Range (WCDMA / UMTS) 2100Mhz

DL - 2110-2170

UL - 1920-1980