PSBWLR-1900PCS Bidirectional Amplifier

ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 1 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 2 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 3 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 4 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 5 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 6 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 7 of 8 WLR1900CUserMan.doc 12/06/2001 ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 8 of 8 WLR1900CUserMan.doc 12/06/2001

December 11, 2001 Timco Engineering Inc. 849 NW State Road 45 Newberry, FL 32669 Telephone 888.472.2424 Fax 352.472.2030 Applicant:Withus Co., LTD Migeumpark 2F, 150 Geumgok-dong Bundang-gu, Seongnam-si KYONGKI-DO, KOREA 463-480 Telephone number 82-37-710-1806 FRN 0005-8335-12 Re: Confidentiality of schematics Equipment: Bidirectional Amplifier FCC ID: PSB WLR-1900 Gentlemen: It is requested that the information contained in the block diagrams, operational description and schematics of the application be held confidential per Section 0.459. Please use this information in obtaining a grant of certification for the bi-directional amplifier for use in the personal communications services, model number WLR-1900C. In support of this request, we submit the following: 1. Identification of the specific information for which confidential treatment is sought: The materials set fourth in the Operational Description, Block Diagram, Parts List, and Schematics, are those for which confidentiality is sought. 2. Identification of the Commission proceeding in which the information was submitted or a description of the circumstances giving rise to the submission: The proceeding is that involving the application for equipment authorization (certification) under FCC ID No: PSB WRL-1900 3. Explanation of the degree to which the information is commercial or financial, or contains a trade secret or is privileged: This material includes a detailed theory of operation and circuit diagrams, (schematics, part list, and Block diagrams). As such this material is treated as highly confidential business information and is not subject to public view. Should you require any further information, please contact the undersigned. Thank you for your consideration in this matter. Sincerely, Scot Rogers Rogers Labs, Inc. ROGERS LABS, INC. 4405 West 259 th Terrace Louisburg, KS 66053 Phone / Fax (913) 837-3214

ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 1 of 1 WLR1900CExtPho.doc 12/06/2001 External Photograph for WLR-1900C

ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 1 of 1 WLR1900CLabel.doc 12/11/2001 FCC ID Label placement and Label for WLR-1900C

ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C Louisburg, KS 66053 Test #: 011109 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 1 WLR1900CIntPho1.doc 1/4/2002 Internal Photographs of Printed Circuit Board for WLR1900C

ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C Louisburg, KS 66053 Test #: 011109 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 1 WLR1900CIntPho2.doc 1/4/2002 Internal Photographs of Printed Circuit Board (power supply board) for WLR1900C

ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 1 of 1 WLR1900CIntPho.doc 12/06/2001 Internal Photographs of Printed Circuit Board for WLR1900C

TEST REPORT For APPLICATION of CERTIFICATION For Withus Co., LTD Migeumpark 2F, 150 Geumgok-dong Bundang-gu, Seongnam-si KYONGKI-DO, KOREA 463-480 S.J. Kim R&D Institute Director MODEL: WLR-1900C CDMA PCS REPEATER FREQUENCY: 1850-1870 MHz Uplink 1930-1950 MHz Downlink FCC ID: PSB WLR-1900 Test Date: November 19, 2001 Report Prepared: December 20, 2001 Certifying Engineer: Scot D. Rogers ROGERS LABS, INC. 4405 West 259th Terrace Louisburg, KS 66053 Phone: (913) 837-3214 FAX: (913) 837-3214 This report shall not be reproduced except in full, without the written approval of the laboratory. This report must not be used by the client to claim product endorsement by NVLAP or any agency of the U.S. Government. ROGERS LABS, INC. 4405 West 259 th Terrace Louisburg, KS 66053 Phone / Fax (913) 837-3214 NVLAP Accredited LaboratoryNVLAP Lab Code: 200087-0 ROGERS LABS, INC.Withus Co. LTD 4405 West 259 th TerraceMODEL: WLR-1900CCDMA PCS Bi-directional Amplifier Louisburg, KS 66053Test #:011109FCC ID#: PSB WLR1900SN: ENG-01 Phone/Fax: (913) 837-3214Test to: FCC Parts 2,15,22 and 24Page 2 of 29 CERTIFICATION\WLR1900CRpt 12/20/01 TABLE OF CONTENTS FORWARD:3 LIST OF TEST EQUIPMENT3 2.1033(C)APPLICATION FOR CERTIFICATION4 2.1046RF POWER OUTPUT5 Measurements Required:5 Test Arrangement:5 Results:6 2.1047MODULATION CHARACTERISTICS7 Measurements Required:7 INTERMODULATION CHARACTERISTICS7 2.1049OCCUPIED BANDWIDTH8 Measurements Required:8 Test Arrangement:8 Results:8 2.1051 SPURIOUS EMISSIONS AT ANTENNA TERMINALS10 Measurements Required:10 Test Arrangement:10 Results:14 2.1053FIELD STRENGTH OF SPURIOUS RADIATION14 Measurements Required:14 Test Arrangement:15 Results:16 2.1055FREQUENCY STABILITY17 Measurements Required:17 Results:17 CONDUCTED EMISSIONS ON POWER LINES17 Conducted EMI17 Results:20 APPENDIX21 NVLAP Accredited LaboratoryNVLAP Lab Code: 200087-0 ROGERS LABS, INC.Withus Co. LTD 4405 West 259 th TerraceMODEL: WLR-1900CCDMA PCS Bi-directional Amplifier Louisburg, KS 66053Test #:011109FCC ID#: PSB WLR1900SN: ENG-01 Phone/Fax: (913) 837-3214Test to: FCC Parts 2,15,22 and 24Page 3 of 29 CERTIFICATION\WLR1900CRpt 12/20/01 FORWARD: In accordance with the Federal Communications Code of Federal Regulations, dated October 1, 2000, Part 2 Subpart J, Paragraphs 2.907, 2.911, 2.913, 2.915, 2.925, 2.926, 2.1031 through 2.1057, applicable paragraphs of Parts 15, 22 and 24, the following is submitted: List of Test Equipment A Hewlett Packard 8591EM and or 8562A Spectrum Analyzer was used as the measuring device for the emissions testing. The analyzer settings used are described in the following table. Refer to the Appendix for a complete list of Test Equipment. HP 8591EM SPECTRUM ANALYZER SETTINGS CONDUCTED EMISSIONS: RBWAVG. BW DETECTOR FUNCTION 9 kHz30 kHzPeak/Quasi Peak RADIATED EMISSIONS (30 – 1000 MHz): RBWAVG. BW DETECTOR FUNCTION 120 kHz300 kHzPeak/Quasi Peak HP 8562A SPECTRUM ANALYZER SETTINGS RADIATED EMISSIONS (1 – 40 GHz): RBWAVG. BW DETECTOR FUNCTION 1 MHz1 MHzPeak/Average ANTENNA CONDUCTED EMISSIONS: RBWAVG. BW DETECTOR FUNCTION 100 kHz100 kHzPeak NVLAP Accredited LaboratoryNVLAP Lab Code: 200087-0 ROGERS LABS, INC.Withus Co. LTD 4405 West 259 th TerraceMODEL: WLR-1900CCDMA PCS Bi-directional Amplifier Louisburg, KS 66053Test #:011109FCC ID#: PSB WLR1900SN: ENG-01 Phone/Fax: (913) 837-3214Test to: FCC Parts 2,15,22 and 24Page 4 of 29 CERTIFICATION\WLR1900CRpt 12/20/01 2.1033(c)Application for Certification (1) Manufacturer:Withus Co., LTD Migeumpark 2F, 150 Geumgok-dong Bundang-gu, Seongnam-si KYONGKI-DO, KOREA 463-480 Marketer/Vendor: TEKK Incorporated 226 NW Parkway Kansas City, MO 64150 (2)Identification:Model:WLR-1900C S/N: ENG-01 FCC I.D.: PSB WLR-1900 (3)Instruction Book: Refer to exhibit for Draft Instruction Manual. (4)Emission Type:Bi-directional Amplifier of CDMA signals, REPEATER (1M3G7W) (5)Frequency Range: Up-link 1850-1870 MHz Downlink 1930-1950 MHz (6) Operating Power Level: Uplink, 0.032 Watts (Maximum Power). Downlink, 0.005 Watts. The power is continuously variable from the value listed to 5%-10% of the maximum output power. (7)Max P o :Uplink, 15 dBm, 0.032 Watts. Downlink, 7 dBm, 0.005 Watts. (8) Power into final amplifier: 1.75 Watts (5.0 V @ 0.350 A) (9)Tune Up Procedure for Output Power: Refer to Exhibit for Transceiver Alignment Procedure. (10) Circuit Diagrams; description of circuits, frequency stability, spurious suppression, and power and modulation limiting: Refer to Exhibit for Circuit Diagrams. Refer to Exhibit for Theory of Operation. (11)Photograph or drawing of the Identification Plate: Refer to Exhibit for Photograph or Drawing. (12)Drawings of Construction and Layout: Refer to Exhibit for Drawings of Components Layout and Chassis Drawings. (13) Detail Description of Digital Modulation: Not applicable. The unit is an amplifier to be used with CDMA signals. NVLAP Accredited LaboratoryNVLAP Lab Code: 200087-0 ROGERS LABS, INC.Withus Co. LTD 4405 West 259 th TerraceMODEL: WLR-1900CCDMA PCS Bi-directional Amplifier Louisburg, KS 66053Test #:011109FCC ID#: PSB WLR1900SN: ENG-01 Phone/Fax: (913) 837-3214Test to: FCC Parts 2,15,22 and 24Page 5 of 29 CERTIFICATION\WLR1900CRpt 12/20/01 2.1046RF Power Output Measurements Required: Measurements shall be made to establish the radio frequency power delivered by the transmitter into the standard output termination. The power output shall be monitored and recorded and no adjustment shall be made to the transmitter after the test has begun, except as noted below: If the power output is adjustable, measurements shall be made for the highest and lowest power levels. The uplink and downlink of the test sample were alternately connected through external attenuators and cables to a spectrum analyzer. Each link received an unmodulated signal from a signal source delivered to the input. The level of the input signal was adjusted to achieve maximum output power of the amplifier. Testing was performed at three frequencies within each passband. …

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ROGERS LABS, INC.Withus Co., LTD 4405 W. 259th TerraceMODEL: WLR 1900C Louisburg, KS 66053Test #: 011109 Phone/Fax: (913) 837-3214Test to: FCC Parts 2 and 24Page 1 of 1 WLR1900CRFExp.doc 12/12/2001 General The WLR-1900C is a building mounted PCS amplifier with output power less than 1640 W EIRP. Per table 1 of 1.1307 CFR 47, evaluation is not required for this device. Due to the location of the antenna, normal operating conditions and use, the unit will satisfy the requirements for RF Exposure per FCC rule 1.1310. Calculations are made here for completeness. SPECIFIC ABSORPTION RATE CALCULATION Calculations per 2.1093 of CFR 47. These calculations are based upon a typical human figure as approximated below. The height is 5’ 8” (173 cm.) and the weight is 160 lbs. (72.6kg). The calculated absorption cross section for this figure is 143 cm squared. CALCULATED UNCONTROLLED, GENERAL POPULATION SAR S = PG/(4πR 2 ) Where S = power density in mw/cm 2 P = input power to antenna in mw. G = power gain of antenna R = distance from antenna in cm. For a minimum distance of 3000 centimeters and 0.032 watts (32mW) operation with the supplied antenna, S is: S = 32(1)/(4π(3000) 2 ) = 2.83E-7 mw/cm 2 For a body cross sectional area of 143 cm squared, (2.83E-7)(143) = 4.05E-5 mw is absorbed. For a body mass of 72.6 kg, this is 4.05E-5/72.6 = 5.57E-7 mwatts/kg This is well within the 1 mw/cm 2 limit prescribed by CFR 47 paragraph 1.1310.