Introduction of 10dBm RF Repeater

Introduction of 10dBm RF Repeater

1. What is repeater ?

2. Overview

3. Specification

4. Coverage Simulation

5. Isolation

6. Major Function

7. LED Indications

8 . Installation

1. What is Repeater ?

Base Station RepeaterMobileStation

Donor Cell

Pick upAntenna

ServiceAntenna

F1

F1

RSS(DL)

DistanceRSS: Receive Signal Strength

Gain

The repeater system enhances the cell coverage in the radio-shadow area where similar RF performance to the base station is required.

RSS=kd 2~4

Tx

2. OverviewThis small repeater is used to cover shadow area of small office and home ( under 300m2 Area)

- WCDMA Single band Repeater

- Auto-Isolation check function

- Easy & Fast Installation

- Auto-shutdown Function

- Auto Gain Control

- Input output power display

Major Features

Donor Port

DC 6V In port

Input level indicator

Output level indicator

Power LED

Alarm LED

Service Antenna

3. Specification I

3. Specification ll

Path BTS Out Free Space

Donor ANT

RF Cable

PicoIn

Pico Gain

PicoOut

Service ANT Free Space Barrier

InputHandset

Down-link 43dBm -96dB 8dBi -10dB -55dBm 64dB 9dBm 3dBi -60dB -15dB -63dBm

Path BTS In Free Space

Donor ANT

RF Cable

PicoOut

Pico Gain

Pico In

Service ANT Free Space Barrier

OutputHandset

Up-link -86dBm -96dB 8dBi -10dB 12dBm 64dB -52dBm 3dBi -60dB -15dB 20dBm

13m Free Space Propagation Loss10m RF Cable1.65Km

- Coverage area: 300m2 (at WCDMA 2100)

- Mobile handset output power lower than 20dBm after call setup

- Considered -15dB as barrier loss

- Typically received signal sensitivity of mobile handset is -104dBm(GSM, DCS, CDMA, WCDMA)

4. Coverage Simulation

Feed Back Signal

Input OutputRepeater

1) Definition of Isolation

- Definition of Repeater Isolation

The different value of Repeater Output power and Feedback Signal power

The loss of wireless space.

- Recommended Repeater Gain = Isolation – 15dB

5. Isolation

5. Isolation

2) Calculation of Isolation

- How to calculate Isolation Value ?

Feed Back Signal

Feed Back  Signal Input  level ‐70dBm

RepeaterRx Level from Donor ‐50dBm Output 9dBm

Repeater Gain 64dB

• Isolation Check start after Power ON

- Antenna Isolation is Checked after Power ON automatically- Max gain is 15dB lower than Antenna Isolation.

•MAX Gain value = Antenna Isolation – 15dB•MAX Gain Value is lower than 64dB

- If Antenna Isolation is lower than 50dBm, Repeater is Shutdown and display Installation Fail Alarm.

• Periodical Isolation Check

- After Power ON Antenna Isolation is checked by every 24 hours.- Max Gain is 15dB lower than Antenna Isolation.

MAX Gain value = Antenna Isolation – 15dB

- If Antenna Isolation is lower than 50dBm, Repeater is Shutdown and displayShutdown Alarm.

Auto Isolation Check

6. Major Function

• Adjust Max gain level to make Downlink Output level is not over +10dBm ±2dB,Control MAX Gain value ~ 30dB.

-MAX Gain Value is acquired by Automatic Isolation Check function.

•Uplink Gain is as same as Downlink Gain.

Automatic Level Control

6. Major Function

6. Major Function

• If Downlink Output level is over +12dBm±2dB for 10 sec, Repeater Downlink and Uplink is Shutdown for 30 minutes and display Temporary Alarm.

• Uplink Output level is +21dBm±2dB for 10 sec, Repeater Downlink and Uplink is Shutdown for 30 minutes and display Temporary Alarm.

• Re-start after 30 min, and then Downlink and Uplink Output level is normal , back to Normal operation status.

• Re-start after 30 min, and then Downlink and Uplink Output level is overpowerfor 10 sec , Repeater is shutdown and display Shutdown Alarm.

10 Sec. 30 Min. 10 Sec.

10 Sec. 30 Min.

Output Overpower Shutdown

IN PUT OUT PUT

-55dBm over +9dBm over

-65 ~ -56dBm -1 ~ 8dBm

-75 ~ -66dBm -11 ~ -2dBm

-85 ~ -76dBm -21 ~ -12dBm

-86dBm below -22dBm below

Level Display Bar display Downlink Input power level and output power levelAfter operating 20min, Power off

Status PWR ARM IN PUT OUT PUT

Power supply OFF OFF OFF ON ON

Normal operation Green Green ON ON

Shutdown Green Red ON ON

Installation Fail Green Red ON Green Blink

Isolation Check Green Red ON ON

Auto LED Indicator sleep(After turn on within 20minutes)

Green OFF OFF OFF

7. LED Indications

8. Installation Procedure a. Install the Donor Antenna and RF Cable where you want to by using antenna mounting bracket

b. In process a, Donor antenna should be installed to the base station direction for better performance.

c. Installation method for antenna mounting bracket

C-1. Attach the wall sticker and then insert the anchor by using drill.

C-2. The mounting bracket should be locked up to wall by using screw.

C-3. The antenna plugs in mounting bracket and assemble tightly both A and B

C-4. Rotate the antenna where you want to and then push the one touch button for finally fix.

8. Installation Procedure d. Install the repeater mounting bracket to the wall where you want to service by using

screw.

e. After process d, Insert the repeater properly into the mounting hole.

f. Cabling RF Cable between Donor Antenna and Donor port of repeater.

g. Power on by plugging in AC/DC adaptor

h. After process g, the repeater will start the Automatic Gain setting.

It will take a time about 1 ~ 2 minutes.

i. After process h, the repeater starts the mobile service.

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