StratCom Repeater Equipment Introductionstratcomintl.com/download/StratCom_RepeaterEquipment.pdf ·...

1

Repeater EquipmentIntroduction

ICS Repeater

UHR

2

Line Repeater

Domestic Sale Products

USA - Sprint

Micro repeater

2

Overseas Sale Products

Mobile WiMAX Optical Mobile WiMAX Optical

IndonesiaIndonesia

WICS REPEATER(WCDMA Interference Cancellation System)

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1.WICS Repeater

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1.1 introduction

This instrument is an ICS (Interference Cancellation System) for the repeater of W-CDMA system, which receives forward

signal and backward signal thought the donor and service antenna. It amplifies the received signals and sends them to base

station and mobile to get more strong signal. During this process, it cancels the interference signal between the donor and

receiving antenna.

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receiver Interference cancellor transmitter

Reflected signals- Direct Feedback signal- Multi-path signals

Service signal

+ DSP

Service signalReflected signal

Cancellor can cancel 10dB signal power greater than input signal.

1.2 ICS concept

WICS Repeater

RF 중계기는 Outdoor로사용시고출력으로사용이어렵다.

RF 중계기는 Outdoor 설치시설치장소선택이어렵다.

RF 중계기는안테나간 Isolation문제로인해출력신호가입력측으로 Feed-back되어발진의문제를일으킨다.

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Optic repeater needs master and slave repeater and high price.

Optic repeater needs high installation fee to put optical fiber to get transmit path.

Frequency change repeater has low frequency usage efficiency

Frequency change repeater also needs master and slave repeater and high price.

2.2 Disadvantages of Optic and frequency change repeater

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RF repeater can not transmit high power output at outdoor.

RF repeater has a lots of limitation to find the installation place.

RF repeater can not use for outdoor service due to oscillation of feedback signal.

2.1 Disadvantages of RF repeater

2. Disadvantages of other types of repeater

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3.1 Advantages of ICS repeater

ICS repeater can solve the isolation problem of RF repeater and installation cost are chipper than Optic

repeater with same service coverage.

ICS repeater can use full frequency range compared to frequency change repeater.

3. Advantages of ICS repeater

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Donor ANT

BTS

Coverage Area

ICS Repeater

Service ANT

4.1 Network configuration

4. Network configuration

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5.1 System configuration

5.System configuration and specification

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••

5.2 System modules inside

⑥

① ②③

④

⑤

⑦

⑨

⑧

⑩

⑪

No. Item Function1 DISPLAY VFD

2 DATA INPUT Key PAD for VFD

3 NMS / DEBUG

GUI Program connection Port (9 Pin D-Sub)- ReMS Debug Port (USB)- NMS Board Hardware Reset

4 ICS MODULE- Controller- RF Up/Down Converter- DSP

5 DOOR Alarm GUI status (Normal: Green, Alarm: Red)

6 PSU AC/DC POWER SUPPLY

7 secondary battery 10 min. battery back-up

8 Service Duplexer Include Arrester & Coupler

9 Link Duplexer Include Arrester

10 HPA forward AMP

11 FAN Cooling fan

12 i-ReMS Remote control and report repeater status

5. System configuration & specification

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5.3 System modules outside

No Item Function1 Tx Input Tx input ANT Port

RX OutputRx output ANT Port

2 RX Monitor Rx output Monitoring Port

3 Tx Output Tx output ANT Port

RX InputRx input ANT Port

4 TX Monitor Tx output Monitoring Port

5 AC POWER AC 220V input Port

6 BATTERY DC POWER DC 27V input Port

①③

④

⑤ ⑥

②

5. System configuration & specification

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6.1 Specification

Item Specification Remark

Frequency Range Down Link 2150 ~ 2170 MHz 4FA

Up Link 1960 ~ 1980 MHz

Frequency Bandwidth 20MHz / 4FA

Band Pass Ripple < 3dB

Frequency Accuracy ± 0.03 ppm Max

Gain Control Range Down Link 65 ~ 95dB

Up Link 65 ~ 95dB

System Delay 9 usec

Input Range Down Link -53.2 ~ -23.2 dBm 4FA

Up Link -69 ~ -39 dBm

Output Power Down Link +41.8dBm 4FA

Up Link +26 dBm

2 5MH / 30KH 16 0 dB

6. System Specification

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6.2 Specification

Item Specification Remark

Power Supply AC 100 ~ 220 V(60Hz)

Power consumption 5W: 300W Max.

Operating Temperature -30 ~ +55

Connector Type • N-Type Female

Dimension W X H X D = 370 x 655 x 260 (mm)

Weight • 30 ~ 35kg

6. System Specification

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3.2 System 형상3.2 System 형상7.1 System main functions

7. System main functions

Items function remark

Isolation measurement Measure isolation between Tx and Rx antennaDisplay on GUI

Acuracy: >±3dB

ILC(set Xth value)

Limit repeater gain within I+Xth value based on measured isolation value System set value of Xth = +7dB

Step size = 1dB every 1min.Period of measurement time

AGC Automatic gain controlReverse gain is set less than forward gain by offset

ALCOutput power is limited by user setting value.Upper and lower limited value are available. Ouput power will be maintained

within this range.

Forward FAauto setting

Automatic FA on function if forward recevied signal is higher than pre-set value

Digtal filter for each FA

Shut DownSystem shutdown if output is greater than pre-set valuePermanetnt shut down if shut down happen more than 5 timesManual turn on is required if permanent shut down happened

UHR(Urban Hybrid Repeater)

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8.1 introduction

UHR (Urban Hybrid Repeater) is installed for the purpose of improving wireless environment of high density of

building areas.

It consist of UMHU and UROU, which has max. output power of 37dBm/4FA(5W)

UMHU is enable to air interfaced with Node-B or other repeater and linked with max. four UROU through a fiber

optic cable

- UMHU 1 : UROU 4 => service antenna 4EA

Embedded 10MHz standard frequency using by OCXO

The optical cable connection between UMHU and UROU is in the way of cascade and its max. distance is 1km

Remote report function using W-CDMA modem installed in UROU

8. UHR system

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9.1 System connection

9. System configuration

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9.2 System connection


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10.1 Specification

NO. Parameters Specification Remark

1 Frequency Range Down Link 2150 ~ 2170MHz

Up Link 1960 ~ 1980MHz

2 Gain / Control Range Down Link 67 ~ 97dB / 30dB 1dB Step

Up Link 71 ~ 91dB / 20dB 1dB Step

3 Gain Flatness≤ 3.0dB

4 Input Power Down Link -60 ~ -30dBm

Up Link -65dBm

5 Output Power Down Link +37dBm/Total UROU

Up Link+26dBm/Total UMHU

6 Frequency Stability≤ ±0.03ppm

7 VSWR≤ 1:1.5

8 Delay≤ 9.0uSec

10. System specification

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11.1 MHU image

11. System image & its component name

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11.2 ROU image

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11.3 MHU component name

① UMPSU

⑧ Duplexer

⑦ OCXO

⑥ UMDTU

⑤ BATTERY

④ UMFCU_TX

③ UMFCU_RX

② UMCPU

No. Name Functions

① UMPSU Input :AC 220V or Battery DC +29V

② UMCPU Control and report of system status

③ UMFCU_RX Frequency conversion from IF to RFGain control for Up-link

④ UMFCU_TX Frequency conversion from RF to IFGain control for down-link

⑤ Battery Back battery

⑥UMDTU

- Signal conversion of IF signal to optic signal for down-link

- Signal conversion of optic signal to IF signal for up-link

- NMS function

⑦ UMREU provide Reference Clock (10MHz) to each module

⑧ UMDUP- Signal division and combining of down and

up-link for each direction- Monitor port available


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11.4 MHU external port

① ② ③ ④ ⑤

No. Name Function

① AC Input System electric power

② RX CPL 30dB Reverse output power monitor

③ TX CPL 10dB Forward input power monitor

④ Optic ROU optic cable connection

⑤ Antenna Connection for antenna


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11.5 ROU component name

① UOPSU

⑧ HPA

⑦ Duplexer

⑥ Optic module

⑤ UOFCU_RX

④ UOFCU_TX

③ BATTERY

② UOCPU

No. Name Function

① UOPSU Input: AC 220V, Battery DC +29V Output : +29V/+9V/+3.3V

② UOCPU System status monitor and control using ReMS

③ Battery Battery backup for 120 sec.

④UOFCU

(TX) Frequency conversion of forward input IF

signal to RF and transmit to HPA

⑤UOFCU

(RX)

Frequency conversion of reverse input RF signal to IF through LNA and convert to optic signal

⑥ UODTU

Signal conversion of forward input optic signal to IF signalSignal conversion of reverse input IF signal to optic signal

⑦ UODUPSignal division and combining of down and up-link for each directionMonitor port available

⑧UOHPA provide output singnal with UOFCU_TX of

forward link to antenna4FA max. +37dBm/4FA


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11.6 ROU external port name

① ② ③ ④

⑤

No. Name Function

① AC Input AC 220V

② Optic 1 UMHU optic cable connection

③ Optic 2 Next UROU cable connection

④ Antenna Antenna port

⑤ TX CPL 30dB Forward link output power monitoring port (30dB)

11. System image its component name

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13.1 MHU main functions

It is outdoor main instrument which sends and receives signals with base stations or other repeaters and

monitoring of subordinate instruments between UROU and URRU is available

For the down-link path antenna input port sometimes has higher other service provider signal and noise, it causes

spurious signal. It uses SAW filter to distinguish FA and handle them separately which guarantees input dynamic

range 3) For the input of UROU and URRU, it provides the same function of above FA selection function

Max. optic cable connection is 1 Km

Signal transmission between MHU and subordinate instruments is done by IF signal, we use accurate 10MHz

OCXO for the frequency stability(0.01 ppm) and good frequency deviation

13. Sytem main functions

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13.2 ROU main functions

It can connect with UMHU or D-FORCE(MHU, ROU) and also other UROU by embedded optic conversion module

Each UROU has one antenna port and four connection ports with four URRU

UROUʼs TX / RX Path have attenuators to control its own path gain

Provide backup battery for electric power shutdown

UROU has ReMS to report system status and control several functions

13.System main functions

RF Line Repeater

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14.1 introduction of RF Line Repeater

RF line repeater will be installed in-building area to cover shadowing area. For example, underground parking lot.

This system can be installed with pre-existed CCTV cable system to save extra cable installation cost

This repeater can be worked with 75Ω coaxial cable with any signal degradation

It uses diplexer to divide W-CDMA signal with CCTV signal and combine each signal without any extra cable

installation

Front panel LED Display shows all system function status for users

It provides ReMS for remote system monitoring and control

14. RF Line Repeater

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2.1 시스템 망구성도


15.1 system connection

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16.1 system specification

NO. Parameters Specification Remark

Down Link Up Link

1 Frequency Range 2150 ~ 2170MHz 1960 ~ 1980MHz WCDMA

1840 ~ 1860MHz 1750 ~ 1770MHz PCS

2 Gain / Control Range 20 ~ 50dB / 30dB 20 ~ 50dB / 30dB 1dB Step

3 Gain Flatness ≤ 2.0dB ≤ 2.0dB

4 Input Power -20 ~ +10dBm -50dBm WCDMA & PCS

5 Output Power +30dBm/Total 0dBm/Total WCDMA & PCS

6 3rd Order Intercept Point - >+20dBm WCDMA & PCS

7 Frequency Stability≤ ±0.05ppm

8 VSWR≤ 1:1.5

9 Delay≤ 5.0uSec

10 Error Vector Magnitude≤ 12.5% WCDMA

11 Spurious (In Band) / PCS>45dBc @885KHz/1.98MHz


17. System image and names

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17.1 system image

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17.2 system component name

No. Name Function

① Module Forward(HPA), reverse(LNA), Drive Amp

② CPU Status monitor and control

③ PSU Input :AC 220V /DC

④ Duplexer Signal division and combining

⑤ RF In RF input(PCS&WCDMA)

⑥ RF Out RF output(PCS&WCDMA

⑦ Mon. Forward output monitoring port(30dB)

⑧ W_RF ReMS connection Port(WCDMA /-50dBm)

⑨ AC IN AC220V

⑩ LED Repeater status display (Alarm)

⑪ Debug_Modem Modem(ReMS) Dedug Port

⑫ Debug_Rep control Port(RS-232)

① Module

⑧ W_RF(ReMS)

⑦ Mon. ⑥ RF Out

⑤ RF IN

④ Duplexer

③ PSU

② CPU

⑨ AC IN(220V)

⑩ LED

⑪ Debug_Modem

⑫ Debug_Rep.


IF Line Repeater

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18.1 IF Line Repeater introduction

IF line repeater can be used indoor and outdoor. It has longer cable connection than RF line repeater due to IF

signal

Its DONOR and REMOTE units can be connected with 5C Cable, 7C Cable, and 2/5 inch Cable

DONOR unit can handle with max. 12 REMOTE units and also, monitor system status and control remotely

using ReMS

Cable loss between REMOTE and DONOR unit is calculated and adjust the gain to compromise cable loss

automatically

18. IF Line Repeater

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19.1 system configuration


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20.1 system specification

NO. Parameters PCS(2G) WCDMA(3G) Remark

Donor Remote Donor Remote

1 Input frequency For 1840~1860MHz 180~200MHz 2150~2170MHz 110~130MHz BW 20MHz

Rev 270~290MHz 1750~1770MHz 60~80MHz 1960~1980MHz

Output frequency For 180~200MHz 1840~1860MHz 110~130MHz 2150~2170MHz

Rev 1750~1770MHz 270~290MHz 1960~1980MHz 60~80MHz

2 Gain/Control For 13~43dB/30dB 29~79dB/50dB 13~43dB/30dB 29~79dB/50dB 1dB Step

Rev 17~47dB/30dB 25~75dB/50dB 17~47dB/30dB 25~75dB/50dB

4 Input Power For -30~0dBm -49dBm -30~0dBm -49dBm WCDMA & PCS

Rev -52dBm -65dBm -52dBm -65dBm

5 Output Power For +13dBm +30dBm +13dBm +30dBm WCDMA & PCS

rev -5dBm +10dBm -5dBm +10dBm

6 Gain adjust 50dB±2dB. Remote


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21.1 Donor image

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21.2 Remote image

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4.1 Donor 내부명칭

No. Name Function

① RF IN RF input(PCS&WCDMA)

② PSU Input : AC 220V /DC

③ MODEM REMOTE communication(FSK)

④ MCU System status monitoring and control

⑤ RF module Multiplexer, Up/Down Conv.

⑥ W_RF ReMS connection Port(WCDMA/ -50dBm)

⑦ case IF_1W DONOR / indoor

⑧ Interface Board NMS & ReMS Debug

⑨ AC IN AC220V

⑩ IF OUT Forward output / reverse input(IF)

⑪ Monitor Forward IF output Monitor(2G/3G -30dB)

①

③

④

⑤

⑥

⑦

⑧

⑨

②

⑩ ⑪

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21.3 Donor component name


No. Name Function

① case IF_1W for outdoor/ water proof

② Lamp

③ Battery 29.4V/480mAH(Li-Polymer)

④ MCU System status monitoring and control

⑤ PSU Input : AC 220V /DC

⑥ Oscillation detect module Detect signal oscillation

⑦ RF module LNA, HPA, Up/Down Conv.

⑧ Multiplexer Dual band Cavity Type

⑨ IF IN Forward input/ reverse output(IF)

⑩ AC in AC220V

⑪ RF OUT / Mon. antenna Port / Monitor(2G/3G -30dB)

①②③

④

⑤

⑦

⑥

⑧

⑩⑨ ⑪

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4.2 Remote 내부명칭

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21.4 Remote component name


-. This function automatically calculate cable loss and compensate its loss for installation convenience-. Cable will be 5C, 7C, or 2/5 inch cable . The cable loss will be compensated up to max. 50dB(±2dB) depending on the type of cable-. Compensation function example is shown below-. Select Cable Loss ON/OFF button be ON, it calculate cable loss automatically. And apply this much loss value 2G and 3G Tx / Rx path.

-. After loss compensation function is done, its function will be OFF and gives the message of ʻsuccessʼ or ʻfailʼ

Cable length 5C-HFBT 7C-HFBT 2/5 inch

100M 9.5dB 6.5dB 3.7dB

200M 19.0dB 13.0dB 7.4dB

300M 28.5dB 19.5dB 11.1dB

400M 38.0dB 26.0dB 14.8dB

500M 47.5dB 32.5dB 18.5dB

600M - 39.0dB 22.2dB

700M - 45.5dB 25.9dB

800M - - 29.6dB

*. Loss calculation error : >±2dB

*. Cable length error : >±10%

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4.2 자동선로보상기능

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22.1 Auto cable loss compensation function

22. System main function

OSC ValueOsc. level

(0dB ~ 3dB)OSC Limit

Max. allowed level(0dB ~ 3dB)

OSC ON/OFF Osc. detect OSC ATT

ATT to protect osc.(0dB ~ 5dB)

- Signal Osc. Detection function This function is only available for forward path

If OSC function is ON, oscillation level is displayed

on OSC Value. If its value is more than pre-set limit

value, OSC ATT is working

If OSC Value greater than OSC limit value is

maintained longer than 5 sec., OSC ATT is working. If

OSC ATT value reaches up to 5dB and oscillation is

maintained longer than 10 sec., it gives alarm

-. Signal oscillation will be happened by feedback signal from REMOTE forward output antenna to DONOR antenna

-. We have to have enough isolation between two antennas

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5.2 미세발진검출기능

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5.2 미세발진검출기능5.2 미세발진검출기능

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22.2 signal osc. detection


Mobile WiMAX Optical Repeater(DAS-10W)

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23.1 System introduction

• DAS-10W is a mobile WiMAX optical repeater using digital signal processing technology for SPRINT NEXTEL.

As optical repeater does, it is connected with base station(RAS) and cover the shadow area to increase the

coverage. The operating frequency is 2495 ~ 2590MHz allocated for SPRINT NEXTEL. It will used in indoor or

underground floor service. A signal transmission using digital signal processing instead of analog processing

has an advantage of longer transmission distance and is easy to distribute the signal to multi-sector, which is

effective to design and manage the system. Since duplexing method is a TDD, a repeater should be able to

synchronize the frame.

• The system construction is very flexible to add the new path up to 3 sectors and 2 branches per each sector.

Therefore, there can be max. 6 branches available. The each sector uses only one LD and optic signal splitter

to have two branches. All RUs are connected in cascade manner. Each sector uses one PD to make reverse

link path with a base station(RAS).

• A notebook can be connected with MHU and RU to see the system status like a optic path delay, output power

level, operating frequency band, attenuation status, each alarm status, etc.

23.Mobile WiMAX Optical Repeater(DAS-10W)

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24.1 System configuration


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25.1 Down Link specification


Parameters Specification NoteMax. Output power 40 dBm/3FA 35 dBm/FA

Gain 40 ~ 70 dB 1 dB step, ±0.7 dB error

Input Level Range -35 ~ -10 dBm /FA -30 ~ -5 dBm /Total

Shutdown Level Max. Output Power + 3 dB ±1.5 dB error

ALC Range More than 20 dB

Input Dynamic Range More than 10 dB

Frequency Stability ±0.02 ppm

EVM(Constellation Error) Less than 5% (64 QAM)

Spectrum Mask 6 MHz @ 100kHz BW (< -13 dBm),

8 MHz @ 1 MHz BW (< -13 dBm),

11 MHz @ 1 MHz BW (< -25 dBm)

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25.2 Up Link specification

Parameters Specification Note

Max. Output power Max. -15 dBm Per FA, -10 dBm/total

Gain 35~ 55 dB 1 dB step, ±0.7 dB error

Input Level Range Less than -50 dBm Per FA

Noise Figure @ Max. Gain 5 dB @Max and Min Gain

@ Min. Gain 12 dB

OIP3(Output Intercept) 32 dBm Output +5 dBm/tone, 2 tones

ALC Range More than 20 dB

EVM Less than 5% (16 QAM)

Spectrum Mask 6 MHz @ 100kHz BW (< -13 dBm),

8 MHz @ 1 MHz BW (< -13 dBm),


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26.1 MHU image

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26.2 ROU image


4.1 Donor 내부명칭

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26.3 MHU Component name


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26.4 MHU Component function

No Module Photo Functions

1 MDAU

√ DL/UL Integrated Module√ DL/UL ALC Function√ DL/UL Monitor -10dB√ DL Gain : 15dB typ.√ UL Gain : 30dB typ.√ AMP Alarm

2 MDOU

√ Time Equalizing√ Components- Outer Interface part- Reference clock PLL part- DSP part- Optic Transmission part√ 2branch / 1MDOU√ In case of 10MHz Ref. or Sync Error- Stop transmitting whole system data


•

26.5 MHU Component function

3 MCU √ Use USB 2.0 B-type√ Provide RJ45 Port

4 MPSU

√ Input power : -48V√ Output power(max)

- +3.4V : 16A- +6V : 15A- +24V : 3A- +12V : 1A

√ Operating Voltage- -43V ~ -53V

5 MFANU

√ Components- FAN- LVDS- VFD & Key pad- I/O Board

√ Input power for FAN : +24V


•


26.6 ROU component name

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26.7 ROU component function

No Module Photo Functions

1 RDOU

√ Digital & RF Part Integrated Unit√ Digital Part

- 10MHz ref. & sync Restore & Transmit- RVS Path Digital Summing- Communicate with MHU through DCC channel

2 HPA √ 16W HPA√ 27V/13A (Avg.)@TDD Mode

3 Switching LNA


•


4 UDCU

- UPC & DNC Integrated Module- UPC : 175à2650MHz(DL Path)

- DNC : 2650à75MHz(UL Path)- Downlink Over-input Protection Function

5 RCPU √ Use USB 2.0 B-type√ Control & Transmit Sync signal

6 RPSU

√ Input power : 27V(Main) 12V(Lamp & Fan)√ Output power(max)

- +3.4V : 5A- +6V : 10A- +12V(Lamp) : 2A- +12V(FAN) : 0.2A


•


7 BPF

√ Integrated Module of 2 BPF : Main & MIMO(DIV)√ Coupling value- DL_Main, DL_MIMO : -40dB- LMU : -47dB

8 ROSU

√ Use for connect type ROU(ROU-C) equipment√ Minimize influence of low rank ROU-T followed by problem of ROU-C√ Automatic Protection Function

- In case of Power OFF- In case of Optic Module Error- In case of Digital Bʼd Malfunction


GSM900 Pico Repeater(10mW)

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28.1 System instruction

• By using Pico Repeater, GSM Operators can provide indoor coverage for better cell quality, increased revenue and

effective utilization of the installed system capacity at economical cost. Micro Repeater provides coverage in small

size offices, inside the house, shopping malls, basements etc., where the signal obstructed.

28. GSM900 Pico Repeater

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2.1 시스템 망구성도29.1 System configuration


•

30.1 System specification

Item Specification

Frequency Range Down Link 935~960MHz

Up Link 890~915MHz

Bandwidth 25MHz

Max. Gain 50dB±3dB

Max. Output Power +7dBm

ALC ≤+7dBm

Auto Shut Down Level +9dBm

Gain Flatness <5dBp-p

Spurious Emissions In Band ≤-36dBm/30KHz

Out Band 9KHz~150KHz: ≤-36dBm/1KHz

150KH 30MH


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30.2 System specification

RX Band Isolation >70dB

VSWR <1.5 : 1

Impedance 50ohm

ALC Range 30dB

POWER Consumption 5Watt

RF Connector SMA(F)

Temperature Range 0 to +55

Dimension 91x119x41mm

Link Antenna 5dBi gain patch

Service Antenna 2dBi gain mono

RF Cable 3D /20m

AC/DC Adaptor AC220V POWER

Power Supply 6V / 1.5A


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31.1 System image

31. System image and name

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Donor Ant

Service Ant

Repeater

AC/DC Adapter

•

32.1 Service antenna

32. Component image and specification

Item Specification

Characteristic

Electrical Characteristi

cFrequency Range 870 ~ 960 MHz

Polarization Vertical

Gain ≥ 5 dBi

Beam width ≥ H-Nominal 60°

≥ V-Nominal 50°

IMD ≥140 dBc

V. S. W. R 1 : 1.5

Power Capability ≤ 50 Watt

Impedance 50 Ω

Physical Characterist

ic

Radiation Element Material Copper

•

•

32.2 Service antenna

Item Specification

Characteristic Frequency Range 870 ~ 960 MHz

Gain ≥ 2 dBi

V. S. W. R 1 : 1.5

Power Capability ≤ 5 Watt

Polarization Vertical

Impedance 50 Ω

Connector Type SMA-Male

Dimension 196×18×15 mm

Weight 34g

Operating Temp -30 ~ _60

•

32. Component image and specification

It provides AGC(Automatic Gain Control) and ASD (Automatic Shutdown) functions.

AGC function is always “ON”.

It dose not have On/Off switch. System will be ON if adaptor is connected with electric power.

Oscillation detection function; It detect the output power to decide the oscillation or not.If it is true, it will Shutdown the repeater to protect it.

3.2 System 형상3.2 System 형상33.1 System main function


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