rp12 wcdma repeater - dow · pdf filetotal_power: total power including cpich, control &...

Company Confidential

RP12 WCDMARP12 WCDMARP12 WCDMARP12 WCDMA

Repeater Repeater Repeater Repeater

© 2010Company Confidential2

• RP12 WCDMA Repeater

• Applications

• System Design

• Commissioning

• Troubleshooting

AgendaAgendaAgendaAgenda


Product Overview

© 2010Company Confidential

Notifications to LED indicators:

For RP 12 GSM / CDMA For RP 12 GSM / CDMA there are 2 LEDs on each RP12-GSM and RP12-CDMA repeaters ,One is power LED and the other one is alarm LED.

For power LED, it glows when the input power is within 110/220V ± 20% ,and power switch is on.

For alarm LED, one can observe three colors, and each one has distinct meanings as listed below.

‧Green : Indicates normal operation.‧Orange: Indicates the AGC(Auto Gain Control) has activated .‧Red : Indicates the I/O power is too high to be depressed by the AGC and the

repeater is then saturated which might damage itself.

4


Notifications to LED indicators:

For RP 12 DCS / WCDMA For RP 12 DCS / WCDMA there are 3 LEDs on each repeaters: one LED indicates the status of the repeater and the other 2 are for uplink/downlink power.

L1 : Status indicator , it should illuminate green when the repeater is working properly.

L2 : Downlink indicator , each green ,yellow or red light represent different alarm.

L3 : Uplink indicator , each green ,yellow or red light represent different alarm.

Please see as the following table

5


RP12WCDMA Repeater Specification

Product Overview

Electrical Specification

Specification Uplink Downlink

1920~1980MHz 2110~2170MHz

Maximum Gain≧60dB

Auto Gain Control≧20dB

Max. Output Power ≧15dBm ≧15dBm

Gain Flatness≦10dB（p-p） ≦10dB（p-p）

Adjacent Channel Rejection Ratio(ACRR) ≧20dBc/30KHZ@±HZ&±HZ

Noise Figure ≦6dB

Return Loss ≦- 10dB

Spurious Emission Mask Comply with 3GPP TS 25.106

Spurious Emission Comply with 3GPP TS 25.106/Category B

Group Delay ≦ 0.5μs

Modulation Accuracy ≦12.5%

Peak Code Domain Error ≦-35dB@Spreading Factor 256

AC adapter DC 9V/3A

2、、、、Mechanical specification

Dimensions(H*W*D) 240×135× 47mm

Weight ≦ 2kg

RF Connector N female

Impedance 50Ω

3、、、、Environmental specification

Operating Temperature -10~50℃



• Applications

• System Design

• Commissioning

• Troubleshooting

• NOKIA 6680 Tech Mode



– RP12WCDMA repeater is dedicated for indoor coverage, such as small offices, houses, basements, and public places.

– The amount of service antennas can be one to four; omni or panel.

– The donor antenna is recommended to be mounted at below 7th floor.

– Donor signal strength and quality must be good enough. (refer to the slide of “Selection of Donor Signal”)

Application


Installation - Wall Mounted

Application


Connection

Application


Heat Sink

Application



• Applications

• System Design

• Commissioning

• Troubleshooting




Flow Chart of Site Survey

1. Use antennas with higher front-to-back ratio

2. Change location of antennas to enlarge their separation

1. Use antennas with higher front-to-back ratio

2. Change location of antennas to enlarge their separation

Negotiate with house owner to know the possible places to mount repeater,

donor & service antennas.

Negotiate with house owner to know the possible places to mount repeater,

donor & service antennas.

Check OK

Change location of donor antenna (Negotiate again?)Change location of donor

antenna (Negotiate again?)

N.G.

Isolation measurement (Donor and service antennas must be brought )

(Make a record)

Isolation measurement (Donor and service antennas must be brought )

(Make a record)

N.G.

Selection of donor signal (Make a record)Selection of donor

signal (Make a record) On-site measurement:(1).Walk test; (2).CQT

On-site measurement:(1).Walk test; (2).CQT

Site Survey OKSite Survey OK

Uplink Noise Floor Consideration(Make a record)

Uplink Noise Floor Consideration(Make a record)

N.G. Change location of donor antenna to cover it up (enlarge path loss)

Change location of donor antenna to cover it up (enlarge path loss)

Good

Good

Good

Good

GoodCheck OK

Check OK Reporting(Site Survey Report or Technical Proposal)

Reporting(Site Survey Report or Technical Proposal)

System Design


Since most of mobile phones nowadays haven’t connecting port of external antenna,

directly measured by a engineering-mode mobile phone is also acceptable.

ToolsToolsNokia-6680 Nokia-6630

SoftwareSoftwareField Test Display

Cell Track (Cell ID)

System Design

Selection of Donor Signal (WCDMA Tools)


dB 6 )N

E( - )

N

E(

MS_CPICH

0

C

AS_CPICH

0

C ≥

dB 70- ~ 60- )N

E( (RSSI) (RSCP)

AS_CPICH

0

C

rTotal_PoweAS_CPICH====++++====

dB 7- )N

E(

AS_CPICH

0

C ≥

WCDMA – Three Criteria as below descriptions & formulas

1. Signal Strength — RSCP of donor signal is better ranged from -60 to -70 dBm. (Depends)

2. Signal Quality — Ec/No of donor signal must be equal or larger than -7 dB.

3. Signal Stability — RSCP of donor signal must be equal or larger than neighbor signals by 6 dB.

Remark

AS_CPICH: Pilot Channel in Active Set (i.e., Serving Cell)

MS_CPICH: Pilot Channel in Monitor Set (i.e., Neighbor Cell)

Total_Power: Total power including CPICH, Control &

Traffic Channels for some frequency.

Selection of Donor Signal (WCDMA Tools)

System Design


Isolation Measurement

Isolation ≧≧≧≧ Rpt. Gain + 15 = 60 + 15 = 75 (dB)

75 dB is the minimum requirement for the isolation between antennas.

System Design


BTSBTS

A

50m

+12dBi -6dB Gain: 60 dB Noise Figure: 6 dB

A

RPRPA

25m

Noise Floor Consideration (Uplink)

Propagation Loss ≧≧≧≧ Rep. Gain + N.F. = 60 + 6 = 66 (dB)

43 dBm -56 -44 -50 dBm

Measured byNetMonotor

Measured by spectrum analyzer

-121 dBm for GSM/DCS-108 dBm for WCDMA

(Thermal Noise)

Trough a good design, noise floor will be well controlled.

Propagation Loss= 93 dB (≧≧≧≧ 66 dB)

System Design


R19

System Design

Technical Proposal / Site Survey Report (Example)


System Design



2006/07/20DateDateDateDate

3F Distribution MapNameNameNameName

Designer Remotek

Introduction:1. The donor antenna (ANT 01) is installed on the roof of the building (6F), pointing to the donor base station to get a clean signal( strength of the primary channel should be 6dB higher than the secondary channel).2. The equipment is installed on the wall inside the room.

3. The service antennas (ANT 02, ANT 03 and ANT 04) are installed under the ceiling of 3F.4. The outdoor cables are paved along with the wall and the indoor cables on the ceiling of the room.

3-way splitter

Omni-directional antenna

Remarks：

1/2"cable

Yagi antenna

28m

63m

6m

8m

25m

9m

5m

14m

ANT 02

ANT 03

ANT 04

PS 01

60m

25m10m

10mRepeater

To ANT01

Distribution Map (Example)

20m

10m

System Design


2006/07/12DatDatDatDateeee

Donor Antenna PictureNameNameNameName

Designer Remotek

To 3F Repeater

CH:72CID:54212Rxlev: -47dBmRxqual:0TA:2

CH:78Rxl:-56dBm

Orientation

Secondary Channel

Primary channel

40m

N

ANT01

: N170°

Distribution Map (Example)

To Rpt

System Design


2006/07/12DataDataDataData

Power Budget MapNameNameNameName

Designer

15.4dBm

ANT01- 6F

-47.7dBm

-47dBm

Repeater-3F

omni-driectional antenna

1/2"cable

Remarks：

3-way splitter

repeater

Yagi antenna

Introduction:1. Lable:ANT-----antenna PS-----splitter HUB-----repeater

2.Cable lossloss of 1/2"cable: 7dB/100mloss of 7/8"cable: 4dB/100m

ANT02 – 3F10m/0.7dB

10m/0.7dB

4.2dB/60m

ANT03 – 3F

ANT04 – 3F

1.8dB/25m

0.7dB/10m

5dBm

9.2 dBm7.4 dBm

8.5 dBm

PS01 - 3F

14.7 dBm

Remotek

Power Budget Map (Example)

System Design

7 6.3 0.8 dBm

0.1 dBm

-1

-3.4



• Applications

• System Design

• Commissioning

• Troubleshooting




Flow Chart of Commissioning

1. Change ant. type2. Enlarge separation

between antennas

1. Change ant. type2. Enlarge separation

between antennas

Complete installation of repeater, cables, & antennas

(Power is still off)

Complete installation of repeater, cables, & antennas

(Power is still off)

Check OK

Check cables and connectors

Check cables and connectors

N.G.

Isolation measurementIsolation measurementN.G.

VSWR test for feeder system

VSWR test for feeder system



CompletedCompleted

Optimization:(1). BTS parameters(2). Repeater parameters

Optimization:(1). BTS parameters(2). Repeater parameters

Uplink Noise Floor Consideration

Uplink Noise Floor Consideration

N.G. 1. Adjust MGC or add external attenuator

2. Cover up donor ant. (enlarge path loss)

1. Adjust MGC or add external attenuator

2. Cover up donor ant. (enlarge path loss)

N.G.

Good

Good

Good

Good

Check OK

Good

Connect repeater to feeder system and then switch on repeater

Check OK

Check OK

Commissioning


Method DTF of site master

Site Master or Similar Equipment

Purpose Measure the cable length

Measure the cable quality

Commissioning

VSWR Test

© 2010Company Confidential28 n

o

Signal Generator Setting

Frequency: 920MHz (GSM)

1795MHz (DCS)

1940MHz (WCDMA)

Output Power: 15dBm ( or above)

Spectrum Analyzer

Setting

Central Frequency: Same

with signal generator

RBW=30 KHz

VBW=30 KHz

Isolation = Signal Generator Output Power – Spectrum Analyzer Measured Value

Exchange the signal generator and spectrum analyzer to confirm another path.

Donor Antnena

Coverage System

Spectrum Analyzer Signal Generator

Commissioning

Isolation Test



• Applications

• System Design

• Commissioning

• Troubleshooting




Q1: Weak received level in the coverage area

Possible Reason Solution

(1). Input donor signal is too weak.

(2). Donor ant. is moved or damaged.

Or the cable connecting between donor

ant. and the repeater is possibly damaged.

(3). Some of cables or passive components

were damaged.

(4). Too many BCCH channels were

introduced.

(5). Repeater was already damaged.

. (1). Increase input signal level by re-orientate or re-locate

donor antenna. If possible, the alternative way is to

change the orientation of BTS antenna

(2). Visual check antenna or the cable. And then use Site Master (DTF function) to check to find out the damaged position.

(3). Same solution as previous item.

(4). Re-orientate or re-locate donor antenna in order to introduce one major BCCH (The major BCCH must be6 dB higher than its 1st strongest neighbor). To decide the orientation of donor ant., it is suggested to use a test mobile with a adaptor cable which isconnected to the donor ant.

(5). Contact with Remotek through our agent.

Troubleshooting


Possible Reason Troubleshooting(1). RxQual of donor signal is originally bad.

(2). Adjacent-channels or Co-channels were

introduced by the repeater system.

(3). Self-oscillation occurs.

(4). Too many BCCH channels were

introduced. (Frequent handover may

downgrade the signal quality).

(1). Re-orientate or re-locate donor ant. in order to find

another donor signal. The alternative way is to contact

the engineer of operator to fix the BTS problem.

(2). Re-orientate or re-locate donor ant. and try to increase

the ratio C/A or C/I (To let the major signal as stronger

as possible, and make the adjacent-channel or co-

channel signals as weaker as possible).

(3). Isolation is possibly insufficient, and the alarm of “AGC”

(Over AGC range) shall light. Try to increase the

separation between service ant. and donor ant. (It’s a

little difficult for complicated DAS indoors).

(4). Re-orientate or re-locate donor antenna in order to introduce one major BCCH (The major BCCH must be 6 dB higher than its 1st strongest neighbor).

Q2: Poor speech quality in the coverage area

Troubleshooting


Possible Reason Troubleshooting(1). RxQual of donor signal is originally bad.













separation between service ant. and donor ant. (It’s a

little difficult for complicated DAS indoors).

Q3: Low Call Setup Successful Rate in the coverage area

Troubleshooting


Possible Reason Troubleshooting(1). Input donor signal is too weak.

(2). RxQual of donor signal is originally bad.




(1). Increase input signal level by re-orientate or re-locate

donor antenna. If possible, the alternative way is to

change the orientation of BTS antenna










separation between service ant. and donor ant.

Q4: High Drop Call Rate in the coverage area

Troubleshooting


THANK YOU

rp12 wcdma repeater - dow · pdf filetotal_power: total power including cpich, control &...

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