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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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