PSBWLR-1900BECDMA PCS Amplifier

ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band WLR-1900C BE Band 2002.07 ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 2 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band The repeater, WLR-1900C BE Band, is an economical solution to eliminate dead zones or no service areas for CDMA networks. ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 3 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band 1950 – 1970 MHz 1870 – 1890 MHz ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 4 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 5 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 6 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 7 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 8 of 8 WLR1900CBEUserMan.doc 8/5/2002 WLR-1900C BE Band

August 5, 2002 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-1900BE 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 BE BAND. 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 WLR-1900BE 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 Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 1 WLR1900CBEExtPho.doc 8/5/2002 External Photograph for WLR-1900C BE Band

ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 1 WLR1900CBELabel.doc 8/5/2002 FCC ID Label placement and Label for WLR-1900C BE Band FCC ID LABEL Withus Co., LTD Model WLR-1900C BE Band FCC ID PSB WLR-1900BE

ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 2 WLR1900CBEIntPho.doc 8/5/2002 Internal Photographs of Printed Circuit Boards for WLR1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 2 of 2 WLR1900CBEIntPho.doc 8/5/2002

August 19, 2002 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-1900BE Gentlemen: The requested information for the intermodulation characteristics is presented below. Please proceed with the review . 2.1047 Modulation Characteristics Measurements Required: The EUT is a bi-directional amplifier and has no provision to modulate the signals. The modulation is dictated by the CDMA protocol. The specifications of Paragraph 2.1047 and applicable parts of 22, and 24 are met. Intermodulation Characteristics Three continuous wave signals were injected, in turn, to the uplink and downlink via a three-way power combiner. Two signals were close together and in the center of the band. The output of each signal generator was adjusted so that the three output fundamental frequencies were equal in magnitude. At the input power levels used all intermodulation products were at -45 dBm or below. Refer to figure below showing the intermodulation characteristics. ROGERS LABS, INC. 4405 West 259 th Terrace Louisburg, KS 66053 Phone / Fax (913) 837-3214 ? Page 2 August 19, 2002 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. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 1 WLR1900CBERFExp.doc 8/5/2002 General The WLR-1900C BE Band 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/(4?R 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)/(4?(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.

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 (BE BAND) CDMA PCS REPEATER FREQUENCY: 1870-1890 MHz Uplink 1950-1970 MHz Downlink FCC ID: PSB WLR-1900BE Test Date: July 25, 2002 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 Laboratory NVLAP Lab Code: 200087-0 ROGERS LABS, INC. Withus Co. LTD CDMA PCS Bi-directional Amplifier 4405 West 259 th Terrace MODEL: WLR-1900C (BE Band) Louisburg, KS 66053 Test #:020725 FCC ID#: PSB WLR1900BE S/N: 020600042/BE Phone/Fax: (913) 837-3214 Test to: FCC Parts 2,15,22 and 24 Page 2 of 23 CERTIFICATION\WITHUSWLR1900CBE 07/30/02 TABLE OF CONTENTS FORWARD: 3 LIST OF TEST EQUIPMENT 3 2.1033(C) APPLICATION FOR CERTIFICATION 4 2.1046 RF POWER OUTPUT 5 Measurements Required: 5 Test Arrangement: 5 Results: 6 2.1047 MODULATION CHARACTERISTICS 7 Measurements Required: 7 2.1049 OCCUPIED BANDWIDTH 7 Measurements Required: 7 Test Arrangement: 8 Results: 8 2.1051 SPURIOUS EMISSIONS AT ANTENNA TERMINALS 10 Measurements Required: 10 Test Arrangement: 10 Results: 13 2.1053 FIELD STRENGTH OF SPURIOUS RADIATION 14 Measurements Required: 14 Test Arrangement: 14 Results: 16 2.1055 FREQUENCY STABILITY 17 Measurements Required: 17 Results: 17 CONDUCTED EMISSIONS ON POWER LINES 17 Conducted EMI 17 Results: 19 APPENDIX 20 NVLAP Accredited Laboratory NVLAP Lab Code: 200087-0 ROGERS LABS, INC. Withus Co. LTD CDMA PCS Bi-directional Amplifier 4405 West 259 th Terrace MODEL: WLR-1900C (BE Band) Louisburg, KS 66053 Test #:020725 FCC ID#: PSB WLR1900BE S/N: 020600042/BE Phone/Fax: (913) 837-3214 Test to: FCC Parts 2,15,22 and 24 Page 3 of 23 CERTIFICATION\WITHUSWLR1900CBE 07/30/02 FORWARD: In accordance with the Federal Communications Code of Federal Regulations, dated October 1, 2001, 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: RBW AVG. BW DETECTOR FUNCTION 9 kHz 30 kHz Peak/Quasi Peak RADIATED EMISSIONS (30 – 1000 MHz): RBW AVG. BW DETECTOR FUNCTION 120 kHz 300 kHz Peak/Quasi Peak HP 8562A SPECTRUM ANALYZER SETTINGS RADIATED EMISSIONS (1 – 40 GHz): RBW AVG. BW DETECTOR FUNCTION 1 MHz 1 MHz Peak/Average ANTENNA CONDUCTED EMISSIONS: RBW AVG. BW DETECTOR FUNCTION 100 kHz 100 kHz Peak NVLAP Accredited Laboratory NVLAP Lab Code: 200087-0 ROGERS LABS, INC. Withus Co. LTD CDMA PCS Bi-directional Amplifier 4405 West 259 th Terrace MODEL: WLR-1900C (BE Band) Louisburg, KS 66053 Test #:020725 FCC ID#: PSB WLR1900BE S/N: 020600042/BE Phone/Fax: (913) 837-3214 Test to: FCC Parts 2,15,22 and 24 Page 4 of 23 CERTIFICATION\WITHUSWLR1900CBE 07/30/02 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 (BE BAND) S/N: 020200042 BE FCC I.D.: PSB WLR-1900BE (3) Instruction Book: Refer to exhibit for Draft Instruction Manual. (4) Emission Type: Bi-directional Amplifier of CDMA signals, 1M3G7W (5) Frequency Range: Up-link 1870-1890 MHz Downlink 1950-1970 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 Laboratory NVLAP Lab Code: 200087-0 ROGERS LABS, INC. Withus Co. LTD CDMA PCS Bi-directional Amplifier 4405 West 259 th Terrace MODEL: WLR-1900C (BE Band) Louisburg, KS 66053 Test #:020725 FCC ID#: PSB WLR1900BE S/N: 020600042/BE Phone/Fax: (913) 837-3214 Test to: FCC Parts 2,15,22 and 24 Page 5 of 23 CERTIFICATION\WITHUSWLR1900CBE 07/30/02 2.1046 RF 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 i…

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ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 1 of 2 WLR1900CBETstPhot.doc 8/5/2002 Test Setup Photographs for WLR-1900C BE Band ROGERS LABS, INC. Withus Co., LTD 4405 W. 259th Terrace MODEL: WLR 1900C BE Band Louisburg, KS 66053 Test #: 020725 Phone/Fax: (913) 837-3214 Test to: FCC Parts 2 and 24 Page 2 of 2 WLR1900CBETstPhot.doc 8/5/2002