HZB-S58-12

September 23, 1999 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attention:Reviewing Engineer The user’s manual supplied in this application is written to include several models of the Tsunami product. The unit which is being submitted here is the 5.8 GHz, 12 Mbps capacity radio (Model 31450). As certifications are obtained, the appropriate regulatory information in the manual is edited. When this manual is released for customers, an appropriate statement will be made in the regulatory information cover sheet indicating which models comply with which FCC and IC rule parts and their appropriate certification numbers provided in of the manual. If you have any questions regarding this submission, please feel free to contact the undersigned. Ken Ruppel Director, Product Management

INSTALLATION AND MAINTENANCE MANUAL ETHERNET BRIDGE SPREAD SPRECTRUM RADIOS (2.4 AND 5.8 GHz) INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 i Installation and Maintenance Manual Copyright © 1999 by Glenayre Western Multiplex. All rights reserved. No part of this manual may be reproduced without prior written permission from Glenayre Western Multiplex. The information contained in this manual is subject to change without notice. Glenayre Western Multiplex shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or equipment supplied with this manual. Glenayre Western Multiplex makes no warranty of any kind with regard to this manual or any equipment supplied with this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Heliax is a registered product of Andrews Corporation. Printed in the United States of America Notice: Y2K (Year 2000 Issue) All software supplied by and for Glenayre Western Multiplex products adheres to the four- (4) digit year nomenclature as required for Year 2000 compliance. Glenayre Western Multiplex 1196 Borregas Avenue Sunnyvale, California USA Tel:+1 408 542-5200 Fax::+1 408 542-5300 Our facility has been Registered to the International Organization for Standardization ISO 9000 Series Standards for quality. Issue:September 1999 INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 ii This page intentionally left blank INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 iii Regulatory Notice This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: *Reorient or relocate the receiving antenna. *Increase the separation between the equipment and receiver. *Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. *Consult the dealer or an experienced radio/TV technician for help. Shielded cables and I/O cords must be used for this equipment to comply with the relevant FCC regulations. Changes or modifications not expressly approved in writing by Glenayre Western Multiplex may void the user's authority to operate this equipment. This device complies with RSS-210 and/or RSS-139 of Industry Canada. Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This device must be professionally installed. INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 iv This page intentionally left blank INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 vW/CS97-1 GENERAL TERMS 1.1 All Definitions contained in Glenayre Western Multiplex's Conditions of Sale (Glenayre Western Multiplex document number CS96-8), apply to the Warranty. 1.2 Subject to the provisions of the Warranty, Glenayre Western Multiplex warrants that the equipment described in Paragraph 1.3 shall conform to their specifications described in Paragraph 1.4 in all material respects and that the equipment shall be free from material defects in materials and workmanship. 1.3 This Warranty applies to all original purchases of Glenayre Western Multiplex manufactured equipment and accessories (collectively the "Equipment"). 1.4 This Warranty applies to the specifications contained in the most recent version of the manual for the model of the Equipment purchased (the "Specifications"). 1.5 This Warranty does not apply to the following items of Equipment which are covered by the Original Equipment Manufacturer's warranty: (a) antenna systems, including coax cable, waveguide, connectors flex-sections, mounts, other parts of the antenna system and installation materials; (b) non-Glenayre Western Multiplex manufactured rack mounted equipment that is assembled wired and tested at Glenayre Western Multiplex's factory or supplied as part of a system, including orderwire items, channel banks, multiplexers, fuse/alarm panels, remote alarm items; and (c) equipment which is not listed in Glenayre Western Multiplex's price book. 1.6 The effective period of this Warranty shall start on the date of shipment of the Equipment and shall end: (a) for all spread spectrum unlicensed radio products and for all licensed digital microwave radio products, two (2) years later; (b) for all analog microwave radio products, three (3) years later; or (c) for all baseband products, five (5) years later (in each case the "Warranty Period"). 1.7 The Customer acknowledges that Glenayre Western Multiplex does not represent or warrant that the services provided by Glenayre Western Multiplex under this Warranty will ensure uninterrupted or error-free operation of the Equipment. RETURN OF EQUIPMENT UNDER WARRANTY 2.1If an item of Equipment malfunctions or fails in normal intended usage and maintenance within the applicable Warranty Period: (a) the Customer shall promptly notify Glenayre Western Multiplex of the problem and the serial number of the defective item; (b) Glenayre Western Mult…

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September 17, 1999 Intertek Testing Services 1365 Adams Ct. Menlo Park, CA 94025 STATEMENT THAT TSUNAMI (Model 31145) RADIOS MUST BE PROFESSIONALLY INSTALLED AND SO IS EXEMPT FROM THE ANTENNA RESTRICTIONS OF FCC PART 15.203, INCLUDING INFORMATION ON ANTENNAS USED FOR TESTING This letter is submitted with regards to professional installation of the Tsunami (Model 31145) radio and the antennas used for testing. The Tsunami (Model 31145) radios must be professionally installed and so is exempt from the antenna restrictions of FCC Part 15.203. The Tsunami (Model 31145) radio is a product manufactured by Western Multiplex in Sunnyvale, California. The Tsunami (Model 31145) radio is to be certified for operation under Part 15.247 of the FCC Rules in the 5725-5850 MHz band. This equipment is designed for point-to-point communications and will only carry data signals using a 10BaseT interface. Due to the unique requirements of installation and integration of these systems, typical consumers or businesses will not have the proper training required for successful implementation of these systems. The Tsunami (Model 31145) is not designed for use by the general public, and will be sold as follows: • either through the Glenayre Western Multiplex sales force to professional communications users in the following categories: electric power utilities, cellular telephone operating companies, personal communication service operating companies, regional Bell operating companies, oil and gas exploration and transmission companies, railroad companies, federal, state and local government agencies, or • through designated and professionally trained Glenayre Western Multiplex Value Added Resellers (VARs) to business users under individual reseller agreements. These companies will either use their professional telecommunications engineering staff to carry out the installation or will subcontract to professional installation firms. On occasion, a professional installation firm will purchase the Tsunami (Model 31145) radios directly. The Tsunami (Model 31145) radio will be used for fixed, permanent or temporary, outdoor links requiring the use of directional antennas at 5.8 GHz which tend to be mounted on towers. These antennas will be 2’, 4’, 6’ or 8’ dishes with narrow beam-widths (ranging from 7 degrees to less than 2 degrees) and require professional installers to align them. In addition, the Tsunami (Model 31145) radio must be set up for the specific line interface required during installation. This procedure must be carried out by a qualified professional installer for the equipment to operate properly. The output power of the Tsunami (Model 31145) radio will be adjusted to meet any applicable EIRP limits by the professional installer during installation. The method of adjusting the output power is described in the manual written for use by professional trained installers. The Tsunami (Model 31145) radio is a full duplex device with a common transmit and receive port. The addition of an external amplifier to boost the transmit power would disable the receive signal, thus rendering the Tsunami (Model 31145) radio inoperable. In addition, high power amplifiers (not generally available at 5.8 GHz) cannot be used without ensuring that signal saturation does not occur (because this would produce unrecoverable deterioration of the receive signal). Thus, the addition of an amplifier could not be accomplished by a non-professional installer. The Tsunami (Model 31145) radio is typically sold without an antenna, and the customer and/or installation engineer chooses from commercially available antennas. From time to time, Glenayre Western Multiplex may sell a commercially available antenna along with the Tsunami (Model 31145) radio upon customer request. Ken Ruppel Director Product Management and Business Development

September 17, 1999 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 We, the undersigned, hereby authorize Intertek Testing Services to act on our behalf in all matters relating to applications for equipment authorization, including the signing of all documents relating to these matters. Any and all acts carried out by Intertek Testing Services on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to the applications authorized hereunder is subject to a denial of benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853 (a). This agreement expires one year from the current date. Ken Ruppel Director, Product Management

September 17, 1999 Federal Communications Commission Authorization and Evaluation Division Laboratory Division 7435 Oakland Mills Road Columbia, MD 21046 Re:Western Multiplex, Tsunami (Model 31145) Radio Request for withholding from public disclosure proprietary information submitted pursuant to an application for certification of an ISM band radio. FCC ID: HZB-S58-12 Dear Sir or Madam: Western Multiplex Corporation requests certain materials submitted with this application for certification of the Tsunami (Model 31145) radio be withheld from public disclosure. This request is made under the provision of Section 0.457 (d) of the Commission’s Rule and Section 552 (b) (4) of the Freedom of Information Act, Trade Secrets. The items marked “Confidential” contain detailed block diagrams, schematic diagrams, and a detailed theory of operation submitted to the FCC for review with this application. The information contains proprietary information (trade secrets) regarding the circuit operation and capabilities (specific values of components, circuit design details and system architecture) which are the result of our extensive investment in research and development. Without the disclosed information, competitive organizations would take considerable more time to assess and develop a workable competitive product. As a result, we believe that disclosure of these company-guarded materials would compromise our leading position in this market. We therefore formally request that the materials marked “Confidential” be kept strictly confidential and not made available for inspection by any other party, except on a need to know basis for the sole purpose of the certification process. Ken Ruppel Director Product Management and Business Development

INSTALLATION AND MAINTENANCE MANUAL ETHERNET BRIDGE SPREAD SPRECTRUM RADIOS (2.4 AND 5.8 GHz) INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 i Installation and Maintenance Manual Copyright © 1999 by Glenayre Western Multiplex. All rights reserved. No part of this manual may be reproduced without prior written permission from Glenayre Western Multiplex. The information contained in this manual is subject to change without notice. Glenayre Western Multiplex shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual or equipment supplied with this manual. Glenayre Western Multiplex makes no warranty of any kind with regard to this manual or any equipment supplied with this manual, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Heliax is a registered product of Andrews Corporation. Printed in the United States of America Notice: Y2K (Year 2000 Issue) All software supplied by and for Glenayre Western Multiplex products adheres to the four- (4) digit year nomenclature as required for Year 2000 compliance. Glenayre Western Multiplex 1196 Borregas Avenue Sunnyvale, California USA Tel:+1 408 542-5200 Fax::+1 408 542-5300 Our facility has been Registered to the International Organization for Standardization ISO 9000 Series Standards for quality. Issue:September 1999 INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 ii This page intentionally left blank INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 iii Regulatory Notice This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: *Reorient or relocate the receiving antenna. *Increase the separation between the equipment and receiver. *Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. *Consult the dealer or an experienced radio/TV technician for help. Shielded cables and I/O cords must be used for this equipment to comply with the relevant FCC regulations. Changes or modifications not expressly approved in writing by Glenayre Western Multiplex may void the user's authority to operate this equipment. This device complies with RSS-210 and/or RSS-139 of Industry Canada. Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This device must be professionally installed. INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 iv This page intentionally left blank INSTALLATION AND MAINTENANCE MANUAL Tsunami FAMILY SPREAD SPECTRUM RADIOS SEPTEMBER 1999 vW/CS97-1 GENERAL TERMS 1.1 All Definitions contained in Glenayre Western Multiplex's Conditions of Sale (Glenayre Western Multiplex document number CS96-8), apply to the Warranty. 1.2 Subject to the provisions of the Warranty, Glenayre Western Multiplex warrants that the equipment described in Paragraph 1.3 shall conform to their specifications described in Paragraph 1.4 in all material respects and that the equipment shall be free from material defects in materials and workmanship. 1.3 This Warranty applies to all original purchases of Glenayre Western Multiplex manufactured equipment and accessories (collectively the "Equipment"). 1.4 This Warranty applies to the specifications contained in the most recent version of the manual for the model of the Equipment purchased (the "Specifications"). 1.5 This Warranty does not apply to the following items of Equipment which are covered by the Original Equipment Manufacturer's warranty: (a) antenna systems, including coax cable, waveguide, connectors flex-sections, mounts, other parts of the antenna system and installation materials; (b) non-Glenayre Western Multiplex manufactured rack mounted equipment that is assembled wired and tested at Glenayre Western Multiplex's factory or supplied as part of a system, including orderwire items, channel banks, multiplexers, fuse/alarm panels, remote alarm items; and (c) equipment which is not listed in Glenayre Western Multiplex's price book. 1.6 The effective period of this Warranty shall start on the date of shipment of the Equipment and shall end: (a) for all spread spectrum unlicensed radio products and for all licensed digital microwave radio products, two (2) years later; (b) for all analog microwave radio products, three (3) years later; or (c) for all baseband products, five (5) years later (in each case the "Warranty Period"). 1.7 The Customer acknowledges that Glenayre Western Multiplex does not represent or warrant that the services provided by Glenayre Western Multiplex under this Warranty will ensure uninterrupted or error-free operation of the Equipment. RETURN OF EQUIPMENT UNDER WARRANTY 2.1If an item of Equipment malfunctions or fails in normal intended usage and maintenance within the applicable Warranty Period: (a) the Customer shall promptly notify Glenayre Western Multiplex of the problem and the serial number of the defective item; (b) Glenayre Western Mult…

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October 12, 1999 Reference: Confirmation:EA95627 FCC ID:HZBS58-12 To Whom It May Concern: This is to inform you that the 2 exhibits submitted today, October 12, 1999, titled authf (authorization letter, category – cover letter) and conf (confidentiality letter, category – cover letter) are to replace the authorization and confidentiality letter that were submitted on October 8, 1999. If you have any questions please email me at [email protected]. Sincerely, Courtney Sherbourne Technical Writer Intertek Testing Services

A Intertek Testing Services, NA Inc. 1365 Adams Court, Menlo Park, CA 94028 Telephone: 650/463-2900Fax: 650/463-2910www.worldlab.com October 28, 1999 Attention: Reviewing Engineer Federal Communications Commission EQUIPMENT APPROVAL SERVICES PO Box 358315 Pittsburgh, PA 15251-5315 Reference:Confirmation #: 13EA95627 FCC ID: HZB-S58-12 Dear Sir/Madam: On October 8, 1999 we submitted Form 731 on behalf of our client Glennayre Western Multiplex. It has come to our attention that the FCC ID was entered incorrectly. Could you please fix it? It was entered as HZBS58-12 and should be HZB-S58-12. The label artwork that was submitted reflects the correct FCC ID. Sincerely, Courtney Sherbourne Technical Writer [email protected]

Attachment 2: 9/20/1999 Processing Gain Test for Tsunami (Model 31145) Test Setup: The processing gain was measured using the CW jamming margin method as described in 15.247(e)(2). The specific test diagram is illustrated below. All test equipment and the EUT were allowed to warm up for four hours prior to start of test to minimize drift over time. All test equipment had valid calibration. Calibration of carrier and interferer levels was performed several times during testing with no observed changes. The measurements were performed on the frequency channel centered at 5741 MHz, over a range of ± 12 MHz. The measurements made across the center ± 9 MHz should be used for calculation of Gp since that bandwidth represents the receiver passband. For the carrier signal, a level approximately 30 dB above threshold was chosen so that thermal noise would not effect the processing gain measurements. The measured threshold of the receive radio was -91 dBm at BER = 1 x 10 -6 , the signal level of the transmit radio was –60 dBm measured at the input of the receive radio. The measured signal level of this same signal at the output of the Power Combiner and attenuator was –40.0 dBm (Ps). This higher level can be more accurate measured, and, this level was referenced to the receiver input (at –60 dBm). It is the numbers referenced to the receiver input that were used for calculating C/I and GP. For the jammer signal, 0 dBm at the generator corresponds to – 31.7 dBm (Pj) at the combiner output. As with the signal power measurements, this higher level can be more accurately measured, and this level was referenced to the receiver input (e.g. using –51.7 dBm for a measurement of –31.7 dBm). It is the numbers referenced to the receiver input that were used for calculating C/I and Gp. Test Equipment: Signal GeneratorHewlett Packard 83731A Power MeterHP435B/8484A BER Test SetFireberd 6000 Explanation of Results: The following notations are used on the spreadsheet data: Pg: Power at Generator in dBm (as indicated by generator display). Pj: Power of interferer: Pg –51.7 dBm at the receiver input (calculated in spreadsheet) Ps: Power of carrier at the receiver input. (initial calibration) J/S: Jammer to Signal ratio, Pj-Ps (dB) (calculated in spreadsheet) Gp: Processing Gain: (S/N)o + J/S + Lsys where: Lsys = 2 dB (S/N)o = 13.5 dB for QPSK and BER = 10 -6 (see curve provided) therefore:Gp = 13.5 + 2 + J/S = 15.5 + J/S (calculated in spreadsheet) All measurements meet the minimum receiver value of 10 dB. Processing Gain Test Equipment Setup Tx 26 dB Signal Generator Pg Power Meter HP 83731A HP 435B/8484A Set for Rx signal level above threshold 20 dB Rx 3 dB FireBERd 6000 Ps’, Pj’ Pwr Cmb. (-3.7 dB) 25 dB Ps, Pj

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 January 21, 2000 RE:Response to FCC Requests Correspondence Reference Numbers: 11532 FCC IDs: HZB-S58-12 Form 731 Confirmation Numbers: EA95627 Attn:Greg Czumak 1. Please find in the attached form a list of different types of antennas may be used with the HZB-S58-12 radios. For your reference, we have also included some typical antenna models made by different manufacturers. Antenna TypeManufacturerModel NumberMid-band Gain (dBi) 1 Foot Flat PanelGabrielDFPD1-5223.5 2 Foot Flat PanelGabrielDFPD2-5228 RSIA57A24-U26.5 2 Foot ParabolicGabrielSSP2-52B28.5 RSIP-57C2429 Radio WavesSP2-5.228.3 3 Foot ParabolicRadio WavesSP3-5.231.4 4 Foot ParabolicGabrielSSP4-52A34.2 RSIP-57B4834.7 Radio WavesSP4-5.234.6 6 Foot ParabolicGabrielSSP6-52A37.5 RSIP-57A7238.2 Radio WavesSP6-5.237.7 8 Foot ParabolicGabrielDRFB8-55ASE40.7 RSIP-57A9640.8 2. • As I have indicated in my previous response, our radios are fixed-mount equipment that are designed for point-to-point outdoor communications. The antennas must be highly directional, and the transmission path must have line-of-sight clearance. The radio antennas must be installed either on top of a tower or a very high building so that the line-of-sight condition can be met. Therefore, the antenna sites are not accessible to the general public. Installation of the radios and antennas must be performed by professional installation engineers. The transmission paths of the radios are well above ground level radiating in a beam point to point rather than omnidirectional to the general public like a paging transmitter. Given all the conditions mentioned above, the radiation of our radios should be considered in the Occupational/Controlled exposure category, rather than of General Population/Uncontrolled Exposure category. However, we still comply with the limit set for General Population/uncontrolled exposure as specified in 1.1310. My last response shows the compliance with calculation for anywhere over 5 meters away from the antenna. We have included a warning message in our manual informing installers to keep at least five meters away from the antenna while the equipment is in operation. 1196 Borregas Ave., Sunnyvale, CA 94089-1302, USA Tel: +1 (408) 542-5200,Fax: +1 (408) 542-5300 • Due to the fact that the HZB-S58-12 radio is used for fix-mount point-to-point communication that requires line-of –sight clearance in the path and that the radio is single-unit in-door equipment, the antenna sites are always far away from the radio equipment room. The typical length of RF cable that runs from the output of the radio to the antenna input is over 100 feet. In situations where an antenna site is extremely far from the equipment room, waveguide may be used as a means to reduce the loss from RF transmission. A typical distance between antenna and radio when waveguide is used is over 200 feet. To give a worst example, let’s assume 100 feet Andrew 5/8” foam coax cable or 200 feet Andrew waveguide is used. Given 0.5dB loss for the connectors on each end, the loss introduced by RF cabling is at least 3.5-5.5 dB (please refer to the table below for Loss/100’ data). As for the majority of cases, the transmission line loss is usually in the range of over 10dB. When this loss is taken into consideration, the maximum possible EIRP will be: Maximum Output power + Maximum Antenna Gain – Minimum Implementation Loss = 23.4 + 41 – 3.5 = 60.9 dBm, which is equivalent to 1230W. Many transmitters and facilities subject to EA listed in Table 1 of 1.1307 are of a broadcasting nature that radiate into the general public, while our radio radiates with a very narrow beam high above the general population. Even though, when taken the transmission line loss into consideration, we are still below the limit of 1640 EIRP set for the broadcasting stations. In summary, our radio will not introduce RF radiation exceeding any FCC limits when using with antennas of up to 41dB, even when more stringent standards for other types of transmitters are applied. We are open to limiting antenna gain to 41dBi if FCC deems it necessary. Feeder Loss TypeManufacturerModel NumberLoss/100' 1/2" foam coaxAndrewLDF 4-506.6 dB 5/8" foam coaxAndrewLDF 4.5-504.7 dB WaveguideAndrewEW-521.2 dB Yours truly Caroline Yu International Product Manager Western Multiplex Corporation

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 February 11, 2000 RE:Response to FCC Requests Correspondence Reference Numbers: 12095 FCC IDs: HZB-S58-12 Form 731 Confirmation Numbers: EA95627 Attn:Greg Czumak Dear Mr. Czumak: Please find in the attached a copy of the section 3-10 of the updated Installation and Maintenance Manual. We actually updated it right after the RF exposure concern was raised by FCC in the process of the UNII approval, but since the HZB-S58-12 application was submitted at an earlier time, this change did not get a chance to be reflected to FCC. I hope with this submission, the HZB-S58-12 approval will be awarded soon. Thanks and best regards! Caroline Yu International Product Manager Western Multiplex Corporation 1196 Borregas Ave., Sunnyvale, CA 94089-1302, USA Tel: +1 (408) 542-5200,Fax: +1 (408) 542-5300

9/20/1999 Processing Gain Test for Tsunami (Model 31145) Test Setup: The processing gain was measured using the CW jamming margin method as described in 15.247(e)(2). The specific test diagram is illustrated below. All test equipment and the EUT were allowed to warm up for four hours prior to start of test to minimize drift over time. All test equipment had valid calibration. Calibration of carrier and interferer levels was performed several times during testing with no observed changes. The measurements were performed on the frequency channel centered at 5741 MHz, over a range of ± 12 MHz. The measurements made across the center ± 9 MHz should be used for calculation of Gp since that bandwidth represents the receiver passband. For the carrier signal, a level approximately 30 dB above threshold was chosen so that thermal noise would not effect the processing gain measurements. The measured threshold of the receive radio was -91 dBm at BER = 1 x 10 -6 , the signal level of the transmit radio was –60 dBm measured at the input of the receive radio. The measured signal level of this same signal at the output of the Power Combiner and attenuator was –40.0 dBm (Ps), used for calculating C/I and Gp. For the jammer signal, 0 dBm at the generator corresponds to – 31.7 dBm (Pj) at the combiner output. This figure is also used for calculating C/I and Gp. Test Equipment: Signal GeneratorHewlett Packar…

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