I2CLW-931USB 4 PORT HUB

LW931 USB 4 port HUB BLOCK DIAGRAM D+ D- +5V D+ D- D+ D- D+ D- D+ D- Auditor byApproved byChecked byEngineer by  LONG WELL ELECTRONICS CORP. LW-T-TPR-65 Self power LED Bus power LED AC Power Adaptor DC power Jack Upstream port Crystal 6MHz EEPROM Relay HUB Controller ISP1122 Downstream Port1 Downstream Port2 Downsteam Port3 Downsteam Port4 LED1/ Power Switch OC Detect LED2/ Power Switch OC Detect LED3/ Power Switch OC Detect LED4/ Power Switch OC Detect

FCC TEST REPORT Report No. : F951910 SPORTON International Inc. FCC ID: I2CLW-931 TEL : 886-2-2696-2468Page No.: 1 of 24 FAX : 886-2-2696-2255Issued Date : May. 27, 1999 FCC TEST REPORT for CISPR PUB. 22 Class B Equipment: USB 4 PORT HUB Model No.: LW-931 FCC ID: I2CLW-931 Filing Type: Original Grant Applicant: LONG WELL ELECTRONICS CORP. 4F, No. 59-1, Tsao Di Wei, Shen Keng Hsiang, Taipei Hsien 222, Taiwan, R.O.C. ! The test result refers exclusively to the test presented test model / sample. ! Without the written authorization of the test lab., the Test Report may not be copied. ! Certificate or Test Report must not be used by the applicant to claim the product in this test report endorsement by NVLAP or any agency of U.S. government. SPORTON International Inc. 6F, No.106, Sec. 1, Hsin Tai Wu Rd., Hsi Chih, Taipei Hsien, Taiwan, R.O.C. FCC TEST REPORT Report No. : F951910 SPORTON International Inc. FCC ID: I2CLW-931 TEL : 886-2-2696-2468Page No.: 2 of 24 FAX : 886-2-2696-2255Issued Date : May. 27, 1999 Table of Contents CERTIFICATE OF COMPLIANCE ....................................................................................................................... 3 1. General Description of Equipment under Test ............................................................................................ 4 1.1. Applicant .................................................................................................................................................................................... 4 1.2. Manufacturer .............................................................................................................................................................................. 4 1.3. Basic Description of Equipment under Test ................................................................................................................................ 4 1.4. Feature of Equipment under Test ............................................................................................................................................... 4 2. Test Configuration of Equipment under Test .............................................................................................. 5 2.1. Description of Test System ......................................................................................................................................................... 5 2.2. Connection Diagram of Test System .......................................................................................................................................... 7 3. Test Software .................................................................................................................................................. 8 4. General Information of Test ........................................................................................................................... 9 4.1. Test Facility ................................................................................................................................................................................ 9 4.2. Standard for Methods of Measurement....................................................................................................................................... 9 4.3. Test in Compliance with.............................................................................................................................................................. 9 4.4. Frequency Range Investigated ................................................................................................................................................... 9 4.5. Test Distance ............................................................................................................................................................................. 9 5. Test of Conducted Powerline ...................................................................................................................... 10 5.1. Major Measuring Instruments ................................................................................................................................................... 10 5.2. Test Procedures ....................................................................................................................................................................... 11 5.3. Typical Test Setup Layout of Conducted Powerline .................................................................................................................. 12 5.4. Test Result of AC Powerline Conducted Emission.................................................................................................................... 13 5.5. Photographs of Counducted Powerline Test Configuration ....................................................................................................... 15 6. Test of Radiated Emission ........................................................................................................................... 17 6.1. Major Measuring Instruments ................................................................................................................................................... 17 6.2. Test Procedures ....................................................................................................................................................................... 18 6.3. Typical Test Setup Layout of Radiated Emission ...................................................................................................................... 19 6.4. Test Result of Radiated Emission ............................................................................................................................................. 20 6.5. Photographs of Radiated Emission Test Configuration ............................................................................................................. 22 7. Antenna Factor & Cable Loss............…

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FEDERAL COMMUNICATIONS COMMISSIONFCC ID:I2CLW-931 Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 U.S.A. Re: About the modification of USB 4 PORT HUB Gentlemen: I, hereby, declare that all modification on the E.U.T., FCC ID: I2CLW-931, will be added or layout on the mass production products. Modifications are shown as below: 1. Added HS102 Bead 8pcs on the D+ & D- signal of USB connector(J3,J4,J5,J6). (As the photo No.6) 2. Shorted case of Crystal and GND of signal. (As the photo No.6) 3. Added 10uF, 2200pF capacitor and HS102 Bead on the pin1 of U2 I.C. chip. (As the photo No.6,7) 4. Added 10uF, 2200pF capacitor and HS121 Bead on the pin6 of U2 I.C. chip. (As the photo No.6,7) 5. Added HS102 Bead on the R10, R11 and Vcc3. (As the photo No.6) 6. Added 220uF capacitor on the pin2 and pin3 of U1 I.C. chip. (As the photo No.6) 7. Shorted eight points on the signal’s GND of PCB solder side. (As the photo No.7) 8. Shorted five points on the signal’s GND of PCB component side. (As the photo No.6) Sincerely yours Nolan Tsai Computer Peripheral Div.Vice President