AZ492FT3808Astro XTL5000 Digital Mobile Radio

Installation Manual ASTRO ® XTL TM 5000 Digital Mobile Radio i zTitle Page ® XTL™ 5000 Digital Mobile Radio Installation Manual Motorola, Inc. 8000 West Sunrise Boulevard Fort Lauderdale, Florida 33322 6881096C72-B ii Foreword This manual covers all models of the ASTRO ® XTL™ 5000 digital mobile radios (models W3, W4, W5, W7, and W9), unless otherwise specified. It includes all the information necessary to maintain peak product performance and maximum working time, using levels 1 and 2 maintenance procedures. This level of service goes down to the board replacement level and is typical of some local service centers, self-maintained customers, and distributors. For details on radio operation or component-level troubleshooting, refer to the applicable manuals available separately. A list of related publications is provided in the section “Related Publications,” on page vii. Product Safety and RF Exposure Compliance See “Installation Requirements for Compliance with Radio Frequency (RF) Energy Exposure Safety Standards,” on page iii. Manual Revisions Changes which occur after this manual is printed are described in FMRs (Florida Manual Revisions). These FMRs provide complete replacement pages for all added, changed, and deleted items. To obtain FMRs, go to https://businessonline.motorola.com. Parts Ordering See Appendix A: Replacement Parts Ordering for information on how to obtain replacement parts. For part numbers, refer to the ASTRO XTL 5000 Digital Mobile Radio Basic Service Manual (Motorola publication part number 6881096C73). Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconductor memories or other media. Laws in the United States and other countries preserve for Motorola certain exclusive rights for copyrighted computer programs, including, but not limited to, the exclusive right to copy or reproduce in any form the copyrighted computer program. Accordingly, any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied, reproduced, modified, reverse-engineered, or distributed in any manner without the express written permission of Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of Motorola, except for the normal non-exclusive license to use that arises by operation of law in the sale of a product. Document Copyrights No duplication or distribution of this document or any portion thereof shall take place without the express written permission of Motorola. No part of this manual may be reproduced, distributed, or transmitted in any form or by any means, electronic or mechanical, for any purpose without the express written permission of Motorola. Disclaimer The information in this document is carefully examined, and is believed to be entirely reliable. However, no responsibility is assumed for inaccuracies. Furthermore, Motorola reserves the right to make changes to any products herein to improve readability, function, or design. Motorola does not assume any liability arising out of the applications or use of any product or circuit described herein; nor does it cover any license under its patent rights nor the rights of others. Trademarks MOTOROLA, the Stylized M logo, FLASHport, and ASTRO are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. © Motorola, Inc. 2003. iii Installation Requirements for Compliance with Radio Frequency (RF) Energy Exposure Safety Standards ATTENTION! This radio is intended for use in occupational/controlled conditions, where users have full knowledge of their exposure and can exercise control over their exposure to meet FCC limits. This radio device is NOT authorized for general population, consumer, or any other use. To ensure compliance to RF Energy Safety Standards: •Install only Motorola approved antennas and accessories •Be sure that antenna installation is per “Antenna Installation,” on page 2-14 of this manual •Be sure that Product Safety and RF Safety Booklet enclosed with this radio is available to the end user upon completion of the installation of this radio Before using this product, the operator must be familiar with the RF energy awareness information and operating instructions in the Product Safety and RF Exposure booklet enclosed with each radio (Motorola Publication part number 68P81095C99) to ensure compliance with Radio Frequency (RF) energy exposure limits. For a list of Motorola-approved antennas and other accessories, visit the following web site which lists approved accessories for your radio model: http://www.motorola.com/cgiss/index.shtml . This Page Intentionally Left Blank iv Table of Contentsv 6881096C72-BSeptember 9, 2003 Table of Contents Foreword .........................................................................................................ii Product Safety and RF Exposure Compliance ............................................................................................ ii Manual Revisions ........................................................................................................................................ ii Parts Ordering ............................................................................................................................................. ii Computer Software Copyrights ...................................................................................................................ii Document Copyrights .................................................................................................................................. ii Disclaimer............................................................................................................................................…

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English Product Safety and RF Energy Exposure Booklet for Mobile Two-Way Radios Installed in Vehicles or as Fixed Site Control Stations ATTENTION! The information provided in this document supersedes the general safety information contained in user guides published prior to February 2002. BEFORE USING THIS RADIO, READ THIS BOOKLET WHICH CONTAINS IMPORTANT OPERATING INSTRUCTIONS FOR SAFE USAGE AND RF ENERGY AWARENESS AND CONTROL INFORMATION FOR COMPLIANCE WITH RF ENERGY EXPOSURE LIMITS IN APPLICABLE NATIONAL AND INTERNATIONAL STANDARDS. © Motorola, Inc. 2004 8000 W. Sunrise Blvd., Ft. Lauderdale, FL 33322 *6881095C99* 68P81095C99-C 2 English RF Energy Exposure Awareness and Control Information, and Operational Instructions for FCC Occupational Use Requirements NOTICE: This radio is intended for use in occupational/controlled conditions, where users have full knowledge of their exposure and can exercise control over their exposure to meet FCC limits. This radio device is NOT authorized for general population, consumer, or any other use. This 2-way radio uses electromagnetic energy in the radio frequency (RF) spectrum to provide communications between two or more users over a distance. It uses radio frequency (RF) energy or radio waves to send and receive calls. RF energy is one form of electromagnetic energy. Other forms include, but are not limited to, sunlight and x-rays. RF energy, however, should not be confused with these other forms of electromagnetic energy, which when used improperly, can cause biological damage. Very high levels of x-rays, for example, can damage tissues and genetic material. Experts in science, engineering, medicine, health, and industry work with organizations to develop standards for safe exposure to RF energy. These standards provide recommended levels of RF exposure for both workers and the general public. These recommended RF exposure levels include substantial margins of protection. All Motorola 2-way radios are designed, manufactured, and tested to ensure they meet government-established RF exposure levels. In addition, manufacturers also recommend specific operating instructions to users of 2-way radios. These instructions are important because they inform users about RF energy exposure and provide simple procedures on how to control it. 3 English Please refer to the following Web sites for more information on what RF energy exposure is and how to control your exposure to assure compliance with established RF exposure limits. http://www.fcc.gov/oet/rfsafety/rf-faqs.html http://www.osha.gov/SLTC/radiofrequencyradiation/index.html Federal Communication Commission Regulations The FCC rules require manufacturers to comply with the FCC RF energy exposure limits for mobile 2-way radios before they can be marketed in the U.S. When 2-way radios are used as a consequence of employment, the FCC requires users to be fully aware of and able to control their exposure to meet occupational requirements. Exposure awareness can be facilitated by the use of a label directing users to specific user awareness information. Your Motorola 2-way radio has a RF exposure product label. Also, your Motorola user manual, or separate safety booklet, includes information and operating instructions required to control your RF exposure and to satisfy compliance requirements. Compliance with RF Exposure Standard Your Motorola two-way radio is designed and tested to comply with a number of national and international standards and guidelines (listed below) regarding human exposure to radio frequency electromagnetic energy. This radio complies with the IEEE and ICNIRP exposure limits for occupational/controlled RF exposure environment at duty factors of up to 50% talk-50% listen and is authorized by the FCC for occupational use. In terms of measuring RF energy for compliance with the FCC exposure guidelines, your radio antenna radiates measurable RF energy only while it is transmitting (during talking), not when it is receiving (listening) or in standby mode. 4 English Your Motorola two-way radio complies with the following RF energy exposure standards and guidelines: • United States Federal Communications Commission, Code of Federal Regulations; 47CFR part 2 sub-part J • American National Standards Institute (ANSI) / Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1992 • Institute of Electrical and Electronic Engineers (IEEE) C95.1-1999 Edition • International Commission on Non-Ionizing Radiation Protection (ICNIRP) 1998 • Ministry of Health (Canada) Safety Code 6. Limits of Human Exposure to Radiofrequency Electromagnetic Fields in the Frequency Range from 3 kHz to 300 GHz, 1999 • Australian Communications Authority Radiocommunications (Electromagnetic Radiation - Human Exposure) Standard, 2003 • ANATEL, Brasil Regulatory Authority, Resolution 256 (April 11, 2001) “additional requirements for SMR, cellular, and PCS product certification.” RF Exposure Compliance and Control Guidelines and Operating Instructions To control exposure to yourself and others and to ensure compliance with the RF exposure limits, always adhere to the following procedures. Guidelines: • User awareness instructions should accompany device when transferred to other users. • Do not use this device if the operational requirements described herein are not met. Instructions: •Transmit no more than the rated duty factor of 50% of the time. To t r a n s m i t (talk), push the Push-To-Talk (PTT) button or, for radios equipped with VOX, speak into the microphone. The red LED will illuminate when the radio is 5 English transmitting. To receive calls, release the PTT button, or, for radios equipped with VOX, stop talking. The red LED will extinguish when the radio stops transmitting. Transmitting 50% of the time, or less, is important because this radio generates measurable RF energy exposure only when transmitting (in terms of measuring for standards compliance). •Transmit only when people outside the vehicle a…

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Applicant: Motorola Inc FCC ID: AZ492FT3808 Exhibit 2 Statement of Certification Pursuant to 47 CFR 2.907 The technical data supplied with this application, having been taken under my supervision is hereby duly certified. The following is a statement of my qualifications: Bachelor of Science in Electrical Engineering, 1997, Georgia Institute of Technology, Atlanta, Georgia Master of Science in Electrical Engineering, 1999,Georgia Institute of Technology, Atlanta, Georgia 6 years experience in RF design and measurement techniques NAME: Daniel Lutfi SIGNATURE: /s/ Daniel Lutfi (signed) DATE: 15 th July 2004 POSITION: RF Engineer I hereby certify that the above application was prepared under my direction and that to the best of my knowledge and belief, the facts set forth in the application and accompanying technical data are true and correct. NAME: Mike Lenzen SIGNATURE: /s/ Mike Lenzen (signed) DATE: 15 th July 2004 POSITION: Engineering Manager

FCC ID: AZ492FT3808 ______________________________________________________________________________ 8000 West Sunrise Boulevard, Fort Lauderdale, Florida 33322. 22 nd July 2004 Authorization & Evaluation Division Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Application for Certification of Transmitter with FCC ID: AZ492FT3808. Gentlemen: Motorola Inc, 8000 West Sunrise Boulevard, Fort Lauderdale, Florida, herein submits application for Certification of the subject transmitter. This transmitter is intended for use in a Mobile Radio environment with capabilities for clear and coded communications with a variable transmit power of 25-120 Watt. The transmitter will operate in the 136-174 MHz frequency band. We are requesting Certification under Part 22, 74 and 90 of the Commission’s Rules to allow operation of this equipment. The subject transmitter complies with Section 90.203 of the Rules in that the operator cannot directly program transmit frequencies using the unit's normally accessible external controls. A complete Certification application is enclosed. If you require any additional information, please contact Mike Ramnath at (954) 723-5793 Sincerely, /s/ Mike Ramnath (signed) Mike Ramnath Manager, Regulatory Compliance Email: [email protected] EXHIBIT 13

FCC ID: AZ492FT3808 ______________________________________________________________________________ Motorola Inc. 8000 West Sunrise Boulevard, Fort Lauderdale, Florida 33322. CONFIDENTIALITY AND SHORT-TERM CONFIDENTIALITY REQUESTED Date: 22 nd July 2004 Authorization & Evaluation Division Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request for Transmitter with FCC ID: AZ492FT3808. Dear Sir or Madam: Motorola is requesting that Exhibit 4 (Circuit Descriptions), Exhibit 5 (Schematic Diagrams), Exhibit 10 (Parts List and Tune Up Procedures), and Exhibit 12 (Operational Description) not be made routinely available for public inspection. Motorola considers the information in these exhibits to be classified as trade secrets, pursuant to 47 CFR Section 0.457(d) and Section 552(b)(4) of the Freedom of Information Act. We are also requesting that the FCC mark Exhibit 3 (External Photos), 8a and 8b (Users Manual) and Exhibit 9, (Internal Photos) as Temporary or Short-Term Confidentiality as outlined in Public Notice DA 04-1705, dated June 15, 2004. This provision will give Motorola temporary confidentiality prior to product launch. Please mark Exhibits 4, 5, 10, and 12 as “Confidential” and Exhibit 3 (External Photos), 8a and 8b (Users Manual) and 9 (Internal Photos) as “Short-Term Confidential”. Please contact me if you require any additional information. Sincerely, /s/ Mike Ramnath (signed) Manager, Regulatory Compliance Tel: (954) 723-5793 E-mail: [email protected] Exhibit 13b

FCC ID: AZ492FT3808 Date: 22nd July 2004 Authorization & Evaluation Division Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Request for Grant Based on Alternative Measurement Procedure for Certification of Transmitter with FCC ID: AZ492FT3808. Dear Sir or Madam: This application respectfully requests a waiver of Sections 1.1310 and 2.1091(d) of the Commission’s rules. The subject transmitter was evaluated for compliance with the RF exposure limits by using both experimental measurements of field strength and computational modeling of specific absorption rates (SAR), as described below. Motorola requests that these combined data be deemed acceptable for equipment authorization of this device. As the Office of Engineering and Technology (OET) is aware, SAR is the fundamental measure of the rate of RF energy absorption and both the scientific basis and compliance metric for the Commission’s RF exposure guidelines. The MPE limits adopted by FCC— and used for RF evaluation procedures and exposure limits for mobile devices—are based on criteria quantified in terms of SAR. The scientific validity of using SAR computational modeling, either as a complement to or in lieu of MPE evaluations, should not be in question. The Commission has already concluded that computational modeling is a scientifically valid method to evaluate RF energy absorption in humans. The Commission’s Report and Order in ET Docket 93-62, FCC 96-326, 11 FCC Rcd.15123 (1996) provided “guidelines on the application of the exposure criteria to portable and mobile devices in general” (at 68). The R&O also concluded (at 70) that there were a number of “appropriate methods and techniques for determining SAR for compliance purposes,” that “the use of appropriate numerical and computational techniques, such as FDTD analysis, is acceptable for demonstrating compliance with SAR values” and that “such techniques offer valid means to determine energy absorption characteristics in exposed subjects.” EXHIBIT 13C SHEET 1 OF 2 EXHIBIT 13C SHEET 2 OF 2 Although the Report and Order’s acceptance of computational modeling was not expressly applied to mobile devices, the Commission’s Rules allow and its technical guidance encourages approval of acceptable, up-to-date measurement procedures. Section 2.947 (a)(3) of the Rules provides the Commission general discretion to accept data gathered by “[a]ny measurement procedure acceptable to the Commission.” FCC’s principal technical guidance, Supplement C to OET Bulletin 65 (Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields) encourages the use of “up-to-date test procedures” and makes clear that “other methods and procedures may be acceptable if based on sound engineering practice.” Simply making field strength measurements and calculating MPE values may result in data that overstate the actual RF energy absorption of persons nearby the device. In the case of the subject transmitter, for example, data for ten test conditions out of a total of fifty-two suggest that applicable MPE limits could be exceeded. Upon closer analysis, however, these conditions were demonstrated to be compliant. Appendix B describes how these ten test conditions were divided into two groups—bystander exposures and passenger exposures—and analyzed with a state of the art computational modeling method to determine compliance with the specific absorption rate (SAR) limits for general public exposure (1.6 W/kg averaged over 1 gram of tissue). This particular computational modeling technique is based on commercially available Finite-Difference- Time-Domain (FDTD) methodology. The data demonstrate that the SAR values for these ten test conditions are in fact compliant with the FCC limits for general public exposure. In summary, SAR is the fundamental measure of RF energy absorption and the scientific basis for FCC’s exposure evaluation guidelines. The Commission has concluded that computational modeling of SAR is a scientifically valid method to evaluate RF absorption. The attached data show that SAR modeling provides accurate exposure evaluations that can be used to demonstrate compliance for test conditions where field strength measurements suggest non-conformance. The Commission’s acceptance of computational modeling data for this device would serve the public interest by furthering the use of newer and more accurate technologies for RF exposure evaluation and by permitting the authorization of public safety radio equipment. Sincerely, /s/ Mike Ramnath (signed) Mike Ramnath Manager, Regulatory Compliance Phone: (954) 723-5793 Email: [email protected]

FCC ID: AZ492FT3808 Date: 22nd July 2004 Authorization & Evaluation Division Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Request for Grant Based on Alternative Measurement Procedure for Certification of Transmitter with FCC ID: AZ492FT3808. Dear Sir or Madam: This application respectfully requests a waiver of Sections 1.1310 and 2.1091(d) of the Commission’s rules. The subject transmitter was evaluated for compliance with the RF exposure limits by using both experimental measurements of field strength and computational modeling of specific absorption rates (SAR), as described below. Motorola requests that these combined data be deemed acceptable for equipment authorization of this device. As the Office of Engineering and Technology (OET) is aware, SAR is the fundamental measure of the rate of RF energy absorption and both the scientific basis and compliance metric for the Commission’s RF exposure guidelines. The MPE limits adopted by FCC— and used for RF evaluation procedures and exposure limits for mobile devices—are based on criteria quantified in terms of SAR. The scientific validity of using SAR computational modeling, either as a complement to or in lieu of MPE evaluations, should not be in question. The Commission has already concluded that computational modeling is a scientifically valid method to evaluate RF energy absorption in humans. The Commission’s Report and Order in ET Docket 93-62, FCC 96-326, 11 FCC Rcd.15123 (1996) provided “guidelines on the application of the exposure criteria to portable and mobile devices in general” (at 68). The R&O also concluded (at 70) that there were a number of “appropriate methods and techniques for determining SAR for compliance purposes,” that “the use of appropriate numerical and computational techniques, such as FDTD analysis, is acceptable for demonstrating compliance with SAR values” and that “such techniques offer valid means to determine energy absorption characteristics in exposed subjects.” EXHIBIT 13C SHEET 1 OF 2 EXHIBIT 13C SHEET 2 OF 2 Although the Report and Order’s acceptance of computational modeling was not expressly applied to mobile devices, the Commission’s Rules allow and its technical guidance encourages approval of acceptable, up-to-date measurement procedures. Section 2.947 (a)(3) of the Rules provides the Commission general discretion to accept data gathered by “[a]ny measurement procedure acceptable to the Commission.” FCC’s principal technical guidance, Supplement C to OET Bulletin 65 (Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields) encourages the use of “up-to-date test procedures” and makes clear that “other methods and procedures may be acceptable if based on sound engineering practice.” Simply making field strength measurements and calculating MPE values may result in data that overstate the actual RF energy absorption of persons nearby the device. In the case of the subject transmitter, for example, data for ten test conditions out of a total of fifty-two suggest that applicable MPE limits could be exceeded. Upon closer analysis, however, these conditions were demonstrated to be compliant. Appendix B describes how these ten test conditions were divided into two groups—bystander exposures and passenger exposures—and analyzed with a state of the art computational modeling method to determine compliance with the specific absorption rate (SAR) limits for general public exposure (1.6 W/kg averaged over 1 gram of tissue). This particular computational modeling technique is based on commercially available Finite-Difference- Time-Domain (FDTD) methodology. The data demonstrate that the SAR values for these ten test conditions are in fact compliant with the FCC limits for general public exposure. In summary, SAR is the fundamental measure of RF energy absorption and the scientific basis for FCC’s exposure evaluation guidelines. The Commission has concluded that computational modeling of SAR is a scientifically valid method to evaluate RF absorption. The attached data show that SAR modeling provides accurate exposure evaluations that can be used to demonstrate compliance for test conditions where field strength measurements suggest non-conformance. The Commission’s acceptance of computational modeling data for this device would serve the public interest by furthering the use of newer and more accurate technologies for RF exposure evaluation and by permitting the authorization of public safety radio equipment. Sincerely, /s/ Mike Ramnath (signed) Mike Ramnath Manager, Regulatory Compliance Phone: (954) 723-5793 Email: [email protected]

Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3A External Photographs The following photographs are attached. 1. Top View 3B 2. Bottom View With FCC Label 3C 3. Front View 3D 4. Back View 3E 5. Side View (Right) 3F 6. Side View (Left) 3G 7. FCC Label (Close View) 3H 8. Radio With RF Exposure Label 3I 9. RF Exposure Label (Close View) 3J Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3B Top View Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3C Bottom View With FCC Label Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3D Front View Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3E Back View Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3F Side View (Right) Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3G Side View (Left) Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3H FCC Label (Close View) Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3I Radio With RF Exposure Label Applicant: Motorola Inc FCC ID: AZ492FT3808 EXHIBIT 3J RF Exposure Label (Close View)

Applicant: Motorola Inc FCC ID: AZ492FT3808 Exhibit 1 LIST OF EXHIBITS DESCRIPTION EXHIBIT REFERENCE I. Identification label information 1 2.1033-(c) 11 & General Information 1a 1. Production Plans 2.1033-(c) 2. Application References 2.1061 3. Data Submittal Procedure II. Certification of Data 2 III. External Photographs 3 2.1033-(c) 12 IV. Block Diagrams (Circuit Diagrams) 4 V. Schematic Diagrams 5 2.1033-(c)-10 VI. Test Report 6 1. RF Output Data 6B 2.1046 2. Audio Response 6C 2.1047 3. Low Pass Filter Response 6D 2.1047 4. Modulation Limiting 6E 2.1047 5. Occupied Bandwidth 6F 2.1049 6. Conducted Spurious Emissions 6N 2.1051 7. Radiated Spurious Emissions 6Q 2.1053 8. Frequency Stability • Temperature 6T 2.1055 • Supply Voltage 6U 2.1055 9. Transient Frequency Behavior 6V 90.214 VII. Test Set-up Procedures 7 2.1041 VIII. Instruction Manual 8 2.1033-(c) 3 IX. Internal Photographs. 9 2.1033-(c) 11, 12 X. Parts List and Tune-Up procedures 10 2.1033-(c) 9, 10 XI. RF Exposure Information 11 2.1091 XII. Operational Description 12 2.1033-(c) 4, 5 1. Technical Characteristics 2. Application XIII. Cover Letter 13 Applicant: Motorola Inc FCC ID: AZ492FT3808 Exhibit 1 IDENTIFICATION LABEL LOCATION See the Attached Photograph or Sketch X Bottom Of Radio Back Of Radio under Belt Clip TYPE X The label is a polyester film laminate with a pressure sensitive adhesive backing. The adhesive is a permanent type acrylic with minimum peel strength of 32 oz/inch. MARKINGS (TEXT) X See the Attached Photograph and Exhibit 3 for the actual location of the FCC label on the device. X Label Attached Below. See Attached Drawing. Applicant: Motorola Inc FCC ID: AZ492FT3808 Exhibit 1 GENERAL INFORMATION I. Production Plans -- Pursuant 2.1033 (c) Quantity production is planned. II. Application References -- Pursuant 2.1061 Reference is made to the following Motorola "Application References" 1. Mobile Products and their application. 2. Mobile Products Transmitter Modulations Methods. III. Data Submittal Procedure: Data is supplied in accordance with Part 2, Sub-part J of the Commissions’ rules. Necessary Bandwidth Computation for 8K10F1E Emission Designator The FCC Rule & Regulations Part 2, §2.202(b) defines Necessary Bandwidth as the minimum value of the occupied bandwidth sufficient to ensure that transmission of information at the rate and with the quality required for the system employed. §2.202(c) lists four methods of determining the necessary bandwidth, including the use of formulas in §2.202(g), and measurement in cases where the other methods of §2.202(c) do not apply. It is felt that while these formulas apply well to voice and many older digital modulation systems, the formulas do not apply to the high performance digital modulation employed in the system submitted for Certification because of difficulties determining representative values for the factors K and M. We have, therefore, used the measurement criteria of §2.202(c)(4). The value cited, 8K10, is the bandwidth that contains 99% of the total transmitted power. The 99% value was chosen because §2.202(b) defines Necessary Bandwidth as the minimum value of the occupied bandwidth . In turn, §2.202(b) defines Occupied Bandwidth as the frequency bandwidth such that, below its lower and above its upper frequency limits, the mean powers radiated are each equal to 0.5% of the total mean power radiated by a given emission, i.e., contains 99% of the total transmitted power. IV. Applicable References: • Reference Certification FCC ID: AZ489FT5823 • EIA/TIA-603A Land Mobile FM or PM Communications Equipment Measurement and Performance Standards • Digital C4FM/CQPSK Transceiver Measurement Method (EIA/TIA 102.CAAA) • FCC …

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