XLM1183CWireless telecommunications survey, measure and test device.

Digital Receiver Technology, Inc. 20250 Century Blvd. Germantown, MD 20874 September 21, 2011 Jennifer Warnell MET Laboratories TCB Certification Department 914 W. Patapsco Avenue Baltimore, MD 21230-3453 Re: Digital Receiver Technology, Inc. Request for Confidential Treatment; Application for Equipment Authorization Dear Ms. Warnell, Digital Receiver Technology, Inc. (“DRT”) hereby requests that the exhibits listed below and attached to the FCC Forms 731 for XLM1183C (Model DRT1183C) and XLM9957A1 (Model DRT9957A) be given confidential treatment and withheld from public inspection pursuant to Section 0.459 of the Commission's Rules, 47 C.F.R. § 0.459. DRT is submitting versions of the Label Location exhibits that contain a drawing of the devices rather than an external photograph. The Label Location exhibits therefore remove the protected information and can be made available to the public. Block Diagrams Schematics Operational Descriptions / Theory of Operation User Manuals Part Lists / BOM Tune Up Procedures Internal Photos External Photos Test Set-up Photos September 21, 2011 Page 2 of 4 Pursuant to Section 0.459(b) of the Commission’s Rules, 47 C.F.R. § 0.459(b), the following information is provided in support of the request for confidential treatment. The information contained in the above-referenced exhibits is restricted from disclosure to non- U.S. persons pursuant to International Traffic in Arms Regulations (“ITAR”). The DRT1183C is categorized as “Military Electronics” pursuant to Category XI(b) of The United States Munitions List because it is “[e]lectronic...equipment specifically designed...for intelligence, security, or military purposes for use in search, reconnaissance, collection, monitoring, direction-finding, display, analysis and production of information from the electromagnetic spectrum....” 1 The DRT9957A is an amplifier designed for the DRT1183C and is also categorized as “Military Electronics” pursuant to Category XI(c) of The United States Munitions List because it constitutes “[c]omponents, parts, accessories, attachments, and associated equipment specifically designed...for use with” the DRT1183C. 2 All documentation, photographs and descriptions of the subject equipment are identified as “Technical Data” under ITAR 3 and require a U.S. Department of State Export License (DSP-5 Technical Data License) specific to the receiving non-U.S. party prior to disclosure. 4 Technical Data is defined as “[i]nformation...which is required for the design, development, production, manufacture, assembly, operation, repair, testing, maintenance or modification of defense articles,” and includes “information in the form of blueprints, drawings, photographs, plans, instructions or documentation.” 5 The information contained in each of the exhibits listed above, including photos that show wiring connections on the outer enclosures of the devices, constitutes “Technical Data” pursuant to this definition. Moreover, Technical Data relating to DRT's equipment is not subject to the exception in the ITAR for information in the “public domain.” 6 The information contained in the exhibits is not published or generally accessible or available to the public through any means including through public release approved by a cognizant U.S. government department or agency. Further, the equipment is sold only to qualified government entities in the United States. Accordingly, the above referenced exhibits cannot be disclosed to the public before or after the equipment authorization is granted. Violation of these export regulations is subject to criminal penalties. 1 See 22 C.F.R. § 121.1 Category XI(b). 2 See 22 C.F.R. § 121.1 Category XI(c). 3 “Technical data” for the subject equipment is itself controlled pursuant to 22 C.F.R. § 121.1 Category XI(d). 4 See 22 C.F.R. § 125.2(a). 5 See 22 C.F.R. § 120.10(a)(I). 6 See 22 C.F.R. § 120.11. September 21, 2011 Page 3 of 4 In addition, pursuant to the Freedom of Information Act (“FOIA”), public disclosure is not required for “trade secrets, commercial or financial information obtained from a person and privileged and confidential.” 7 The commercial proprietary information contained herein falls squarely within this exemption from public disclosure. The exhibits for which confidential treatment is sought contain DRT trade secrets and proprietary information relating to two wireless signal measurement products that DRT has developed and for which it seeks certification. 8 This information is proprietary commercial information of DRT. 9 The market for development of these products is very competitive. 10 Due to the competitive environment for such products, release of this information to its competitors would harm DRT. ll DRT would lose the competitive benefit of the substantial resources it invested in the development of these products should the information contained in these exhibits be disclosed to its competitors. It is customary for companies such as DRT not to disclose the details of its designs, technologies and products to competitors or to the public, and DRT has taken reasonable actions to keep these trade secrets confidential. 12 Specifically, the products will only be sold to the U.S. government, allies of the United States, and public safety and corrections agencies, and are not marketed to the general public. Further, access to DRT's facilities is restricted and limited to U.S. citizens. DRT employees also sign agreements restricting their ability to disclose DRT's intellectual property used to develop products such as the DRT1183C and DRT9957A. The DRT1183C and DRT9957A are marketed, sold and will be used in a manner such that technical information, including external photos, are not provided to the general public. Prospective government, public safety and corrections customers are vetted and technical information, including external photos, are only provided through secure means to properly vetted potential government, public safety …

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MOBILE ANTENNAS Low Profi le Whipless Antennas Mobile Low Profi le Vertical Antennas The MLPV antennas provide superior pattern coverage for mobile and fi xed applications from 380 MHz to 5.8 GHz. Their design provides industry lead- ing wideband performance and reliability, with minimum loss and no tuning required. Dual band versions (MLPVDB series) are also available. All models feature an attractive, compact housing environmentally tested for both indoor or outdoor applications. Features • Attractive, low profi le design for maximum overhead clearance • Industry leading wideband performance provides outstanding coverage across multiple frequency bands with no tuning required • Mates with all 1-1/8”-18 thread mounts, including 3/4” mounts • Wideband, multi-band and no ground plane models available • Black over chrome base standard. Also available in white over chrome or black over black base • “Easy grip” HD models available Technical Data Maximum Power: 150 watts (all models, except UHF and dual band models) 100 watts (UHF and dual band models) Polarization: Vertical Nominal Impedance: 50 Ohm VSWR: < 1.5:1 < 2.0:1 (dual-band and UHF models) Ingress Protection: IP66 Color (add to prefi x to indicate choice): Black over chrome (prefi x not needed), black over black (B) or white over chrome (W). Mount Method: Compatible with most 1-1/8” - 18 thread mounts, including 3/4” hole mounts Mounting The following mounts are recommended with the MLPV antennas on the next page: ModelOptions MLFML195CHigh performance permanent 3/4” hole, 1-1/8”-18 thread mount. Includes 17 ft of Pro-Flex TM Plus 195 cable. Loose TNC male connector included. GMLFML195CHigh performance permanent 3-1/4” diameter magnetic base, 1-1/8”- 18 thread mount. Includes 12 ft of Pro-Flex TM Plus 195 cable terminated with TNC male connector (attached). MTPM8005/8” hole, 1-1/8”-18 thread mount for surfaces up to 1/2-inch thick. Terminates in an N, female connector. No cable.* MVP5/8” hole, vandal proof mount. No cable.* MMF3/4” hole, 1-1/8”-18 mount for frequencies above 1 GHz. Terminates in an SMA, male connector. No cable.* *Order cable assembly separately. BMLPV UHF Model WMLPVDB800/1900S MLPV800 BMLPV800HD PCTEL, Inc. WEB: www.antenna.com MOBILE ANTENNAS Low Profi le Whipless Antennas Antenna Electrical Specifi cations Model*Frequency RangeBandwidthGain*** MLPV380380-410 MHz30 MHzUnity MLPV406406-440 MHz34 MHzUnity MLPV430430-480 MHz50 MHzUnity MLPV450450-512 MHz62 MHzUnity MLPV698698-806 MHz108 MHzUnity MLPV700740-870 MHz130 MHz3 dBi*** MLPV800806-960 MHz154 MHz3 dBi*** BMLPV800HD806-960 MHz154 MHz3 dBi*** BMLPVDB700/2500698-960 MHz and 1710-2500 MHz262 MHz and 790 MHz3 dBi/4 dBi MLPVDB800/1900806-960 MHz and 1710-1990 MHz154 MHz and 280 MHz3 dBi/4 dBi BMLPVDB800/1900HD806-960 MHz and 1710-1990 MHz154 MHz and 280 MHz3 dBi/4 dBi MLPVDB800/1900S806-960 MHz and 1710-2500 MHz154 MHz and 790 MHz3 dBi/4 dBi MLPVDB902/2400902-928 MHz and 2400-2500 MHz26 MHz and 100 MHz3 dBi/4 dBi MLPVDB902/2400S902-928 MHz and 2400-2500 MHz26 MHz and 100 MHz3 dBi/4 dBi MLPV17001700-2700 MHz1000 MHz4 dBi*** MLPVDB24582.4-2.5 GHz and 4.9-5.9 GHz100 MHz / 1000 MHz3 dBi/4 dBi MLPV49004.9-5.9 GHz1000 MHz4 dBi Mechanical Specifi cations Model (all colors)*Antenna DimensionsWeight (Mass)Temperature Range MLPV3803.38” H x 1.5” OD0.31 lbs (.14 kg)-40º C to 70º C MLPV4063.38” H X 1.5” OD0.31 lbs (.14 kg)-40º C to 70º C MLPV4303.38” H X 1.5” OD0.31 lbs (.14 kg)-40º C to 70º C MLPV4503.38” H X 1.5” OD0.31 lbs (.14 kg)-40º C to 70º C MLPV6983.38” H X 1.5” OD0.31 lbs (.14 kg)-40º C to 70º C MLPV7002.4” H X 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C MLPV8002.4” H X 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C BMLPV800HD2.4” H x 1.5” W x 1.7” D (at the base)0.44 lbs (0.19 kg)-40º C to 70º C BMLPVDB700/25002.4” H x 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C MLPVDB800/19002.4” H X 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C BMLPV800/1900HD2.4” H x 1.5” W x 1.7” D (at the base)0.44 lbs (0.19 kg)-40º C to 70º C MLPVDB800/1900S1.79” H x 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C MLPVDB902/24002.4” H X 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C MLPVDB902/2400S1.79” H x 1.5” OD0.29 lbs (0.13 kg)-40º C to 70º C MLPV17001.79” H x 1.5” OD0.34 lbs (0.15 kg)-40º C to 70º C MLPVDB24581.79” H x 1.5” OD (at the base)0.34 lbs (0.15 kg)-40º C to 70º C MLPV4900**1.79” H x 1.5” OD (at the base)0.34 lbs (0.15 kg)-40º C to 70º C * To order black over black version, add the prefi x “B” to the part number. To order the white over chrome version, add the pre- fi x “W” to the part number. Not all models are available in black or white. Call Customer Service for availability. PCTEL, Inc. WEB: www.antenna.com

MPE Limit Calculation: EUT’s operating frequencies in Part 90 band @ 860 MHz; highest conducted power = 12.33 dBm therefore, Limit for Uncontrolled Exposure: 0.573 mW/cm 2 EUT maximum antenna gain = 3 dBi. Equation from page 18 of OET 65, Edition 97-01 S = PG / 4R 2 or R = √PG / 4S where, R = Distance (20 cm) P = Power Input to antenna (17.11 mW) G = Antenna Gain (2 numeric) S = (17.11*2)/(4**400) S = 0.006808 mW/cm 2 MPE Limit Calculation: EUT’s operating frequencies in Part 22 band @ 881.6 MHz; highest conducted power = 21.80 dBm therefore, Limit for Uncontrolled Exposure: 0.588 mW/cm 2 EUT maximum antenna gain = 3 dBi. Equation from page 18 of OET 65, Edition 97-01 S = PG / 4R 2 or R = √PG / 4S where, R = Distance (20 cm) P = Power Input to antenna (152 mW) G = Antenna Gain (2 numeric) S = (152*2)/(4**400) S = 0.06048 mW/cm 2 MPE Limit Calculation: EUT’s operating frequencies in Part 24 band @ 1960 MHz; highest conducted power = 21.94 dBm therefore, Limit for Uncontrolled Exposure: 1 mW/cm 2 EUT maximum antenna gain = 4 dBi. Equation from page 18 of OET 65, Edition 97-01 S = PG / 4R 2 or R = √PG / 4S where, R = Distance (20 cm) P = Power Input to antenna (156.5 mW) G = Antenna Gain (2.52 numeric) S = (156.5*2.52)/(4**400) S = 0.07846 mW/cm 2

MET Laboratories, Inc. Safety Certification - EMI - Telecom Environmental Simulation 914 WEST PATAPSCO AVENUE ! BALTIMORE, MARYLAND 21230-3432 ! PHONE (410) 354-3300 ! FAX (410) 354-3313 33439 WESTERN AVENUE ● UNION CITY, CALIFORNIA 94587 ● PHONE (510) 489-6300 ● FAX (510) 489-6372 3162 BELICK STREET ● SANTA CLARA, CALIFORNIA 95054 ● PHONE (408 748-3585 ● FAX (510) 489-6372 The Nation’s First Licensed Nationally Recognized Testing Laboratory January 25, 2012 Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Dear Steve Hudson, Enclosed is the EMC Wireless test report for MPE measurements of the Digital Receiver Technology, Inc., DRT1183C as evaluated to the requirements of Title 47 of the CFR, Ch. 1 (10-1-06 ed.), Part 1, Subpart I, Title 47 of the CFR, Ch. 1 (10-1-06 ed.), Part 2, Subpart J, and RSS-102, Issue 4, March 2010. Thank you for using the services of MET Laboratories, Inc. If you have any questions regarding these results or if MET can be of further service to you, please feel free to contact me. Sincerely yours, MET LABORATORIES, INC. Jennifer Warnell Documentation Department Reference: (\Digital Receiver Technology, Inc.\EMC31505B-MPE Rev. 1) Certificates and reports shall not be reproduced except in full, without the written permission of MET Laboratories, Inc. Electromagnetic Compatibility Digital Receiver Technology, Inc. Cover Page DRT1183C MPE Limits MET Report: EMC31505B-MPE Rev. 1 © 2012, MET Laboratories, Inc. Page ii of vi DOC-EMC702 6/18/2009 RF Maximum Permissible Exposure (MPE) Report For Controlled and Uncontrolled Environments for the Digital Receiver Technology, Inc. DRT1183C Tested under the FCC Certification Rules contained in Title 47 of the CFR, Part 1 Subpart I & Part 2 Subpart J & RSS-102, Issue 4, March 2010 MET Report: EMC31505B-MPE Rev. 1 January 25, 2012 Prepared For: Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Prepared By: MET Laboratories, Inc. 914 W. Patapsco Ave. Baltimore, MD 21230 Electromagnetic Compatibility Digital Receiver Technology, Inc. Cover Page DRT1183C MPE Limits MET Report: EMC31505B-MPE Rev. 1 © 2012, MET Laboratories, Inc. Page iii of vi DOC-EMC702 6/18/2009 RF Maximum Permissible Exposure (MPE) Report For Controlled and Uncontrolled Environments for the Digital Receiver Technology, Inc. DRT1183C Tested under the FCC Certification Rules contained in Title 47 of the CFR, Part 1 Subpart I & Part 2 Subpart J & RSS-102, Issue 4, March 2010 Len Knight, Project Engineer Jennifer Warnell Electromagnetic Compatibility Lab Documentation Department Engineering Statement: The measurements shown in this report were made in accordance with the procedures indicated, and the emissions from this equipment were found to be within the limits applicable. I assume full responsibility for the accuracy and completeness of these measurements, and for the qualifications of all persons taking them. It is further stated that upon the basis of the measurements made, the equipment tested is capable of operation in accordance with the requirements of the FCC Rules Parts 1 and 2, and Industry Canada standards RSS-102, Issue 4, March 2010 under normal use and maintenance. Shawn McMillen, Wireless Manager, Electromagnetic Compatibility Lab Electromagnetic Compatibility Digital Receiver Technology, Inc. Report Status DRT1183C MPE Limits MET Report: EMC31505B-MPE Rev. 1 © 2012, MET Laboratories, Inc. Page iv of vi DOC-EMC702 6/18/2009 Report Status Sheet Revision Report Date Reason for Revision  December 16, 2011 Initial Issue. 1 January 25, 2012 Revised to reflect customer corrections. Electromagnetic Compatibility Digital Receiver Technology, Inc. Table of Contents DRT1183C MPE Limits MET Report: EMC31505B-MPE Rev. 1 © 2012, MET Laboratories, Inc. Page v of vi DOC-EMC702 6/18/2009 Table of Contents I. Executive Summary .................................................................................................................................................1 A. Purpose of Test ...................................................................................................................................................2 B. MPE Measurements and Applicable Regulations ...............................................................................................2 II. Equipment Configuration .......................................................................................................................................3 A. Overview .............................................................................................................................................................4 B. Test Site ..............................................................................................................................................................4 C. Description of Test Sample .................................................................................................................................5 D. Equipment Configuration ....................................................................................................................................6 E. Support Equipment .............................................................................................................................................6 F. Ports and Cabling Information ............................................................................................................................6 G. Mode of Operation ..............................................................................................................................................6 H. Modifications ......................................................................................................................................................6 a) Modifications to EUT .................................................................................................................... 6 b) Modifications …

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MET Laboratories, Inc. Safety Certification - EMI - Telecom Environmental Simulation 914 WEST PATAPSCO AVENUE ! BALTIMORE, MARYLAND 21230-3432 ! PHONE (410) 354-3300 ! FAX (410) 354-3313 33439 WESTERN AVENUE ● UNION CITY, CALIFORNIA 94587 ● PHONE (510) 489-6300 ● FAX (510) 489-6372 3162 BELICK STREET ● SANTA CLARA, CA 95054-2401 ● PHONE (408) 748-3585 ● FAX (510) 489-6372 The Nation’s First Licensed Nationally Recognized Testing Laboratory January 25, 2012 Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Dear Steve Hudson, Enclosed is the EMC Wireless test report for compliance testing of the Digital Receiver Technology, Inc., DRT1183C (Base Station) as tested to the requirements of the FCC Certification rules under Title 47 of the CFR Part 22 Subpart H for Cellular Devices and FCC Part 24 Subpart E for Broadband PCS Devices. Thank you for using the services of MET Laboratories, Inc. If you have any questions regarding these results or if MET can be of further service to you, please contact me. Sincerely yours, MET LABORATORIES, INC. Jennifer Warnell Documentation Department Reference: (\Digital Receiver Technology, Inc.\EMC31505B-FCC22_24 Rev. 1) Certificates and reports shall not be reproduced except in full, without the written permission of MET Laboratories, Inc. MET Laboratories, Inc. Safety Certification - EMI - Telecom Environmental Simulation 914 WEST PATAPSCO AVENUE ! BALTIMORE, MARYLAND 21230-3432 ! PHONE (410) 354-3300 ! FAX (410) 354-3313 33439 WESTERN AVENUE ● UNION CITY, CALIFORNIA 94587 ● PHONE (510) 489-6300 ● FAX (510) 489-6372 3162 BELICK STREET ● SANTA CLARA, CA 95054-2401 ● PHONE (408) 748-3585 ● FAX (510) 489-6372 MET Report: EMC26033-FCC22 © 2012, MET Laboratories, Inc. Page ii of vii Electromagnetic Compatibility Criteria Test Report for the Digital Receiver Technology, Inc. Model DRT1183C (Base Station) Tested under FCC Certification Rules Title 47 of the CFR, Part 22 Subpart H for Cellular Devices & Part 24 Subpart E for Broadband PCS Devices MET Report: EMC31505B-FCC22_24 Rev. 1 January 25, 2012 Prepared For: Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Prepared By: MET Laboratories, Inc. 914 W. Patapsco Ave Baltimore, MD 21230 Electromagnetic Compatibility Digital Receiver Technology, Inc. Cover Page DRT1183C (Base Station) CFR Title 47 Part 22 Subpart H & Part 24 Subpart E MET Report: EMC31505B-FCC22_24 Rev. 1 © 2012, MET Laboratories, Inc. Page iii of vii Electromagnetic Compatibility Criteria Test Report for the Digital Receiver Technology, Inc. Model DRT1183C (Base Station) Tested Under FCC Certification Rules Title 47 of the CFR, Part 22 Subpart H for Cellular Devices & Part 24 Subpart E for Broadband PCS Devices Len Knight, Project Engineer Jennifer Warnell Electromagnetic Compatibility Lab Documentation Department Engineering Statement: The measurements shown in this report were made in accordance with the procedures indicated, and the emissions from this equipment were found to be within the limits applicable. I assume full responsibility for the accuracy and completeness of these measurements, and for the qualifications of all persons taking them. It is further stated that upon the basis of the measurements made, the equipment tested is capable of operation in accordance with the requirements of Part 22 Subpart H and Part 15 Subpart B of the FCC Rules under normal use and maintenance. Shawn McMillen, Manager Wireless Manager, Electromagnetic Compatibility Lab Electromagnetic Compatibility Digital Receiver Technology, Inc. Report Status DRT1183C (Base Station) CFR Title 47 Part 22 Subpart H & Part 24 Subpart E MET Report: EMC31505B-FCC22_24 Rev. 1 © 2012, MET Laboratories, Inc. Page iv of vii Report Status Sheet Revision Report Date Reason for Revision  September 21, 2011 Initial Issue 1 January 25, 2012 Revised to reflect customer corrections. Electromagnetic Compatibility Digital Receiver Technology, Inc. Table of Contents DRT1183C (Base Station) CFR Title 47 Part 22 Subpart H & Part 24 Subpart E MET Report: EMC31505B-FCC22_24 Rev. 1 © 2012, MET Laboratories, Inc. Page v of vii Table of Contents I. Executive Summary .................................................................................................................................................1 A. Purpose of Test ...................................................................................................................................................2 B. Executive Summary ............................................................................................................................................2 II. Equipment Configuration .......................................................................................................................................3 A. Overview .............................................................................................................................................................4 B. References ...........................................................................................................................................................4 C. Test Site ..............................................................................................................................................................5 D. Description of Test Sample .................................................................................................................................5 E. Equipment Configuration ....................................................................................................................................6 F. Support Equipment .............................................................................................................................................6 G. Ports and Cabling Information ...................................................................................................................…

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MET Laboratories, Inc. Safety Certification - EMI - Telecom Environmental Simulation 914 WEST PATAPSCO AVENUE ! BALTIMORE, MARYLAND 21230-3432 ! PHONE (410) 354-3300 ! FAX (410) 354-3313 33439 WESTERN AVENUE ● UNION CITY, CALIFORNIA 94587 ● PHONE (510) 489-6300 ● FAX (510) 489-6372 3162 BELICK STREET ● SANTA CLARA, CALIFORNIA 95054 ● PHONE (408 748-3585 ● FAX (510) 489-6372 The Nation’s First Licensed Nationally Recognized Testing Laboratory January 25, 2012 Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Dear Steve Hudson, Enclosed is the EMC Wireless test report for testing of the Digital Receiver Technology, Inc., DRT1183C (Base Station), tested to the requirements of Title 47 of the Code of Federal Regulations (CFR), Part 90 for Land Mobile Radio Services. Thank you for using the services of MET Laboratories, Inc. If you have any questions regarding these results or if MET can be of further service to you, please feel free to contact me. Sincerely yours, MET LABORATORIES, INC. Jennifer Warnell Documentation Department Reference: (\Digital Receiver Technology, Inc.\EMC31505B-FCC90 Rev. 2) Certificates and reports shall not be reproduced except in full, without the written permission of MET Laboratories, Inc. MET Laboratories, Inc. Safety Certification - EMI - Telecom Environmental Simulation 914 WEST PATAPSCO AVENUE ! BALTIMORE, MARYLAND 21230-3432 ! PHONE (410) 354-3300 ! FAX (410) 354-3313 33439 WESTERN AVENUE ● UNION CITY, CALIFORNIA 94587 ● PHONE (510) 489-6300 ● FAX (510) 489-6372 3162 BELICK STREET ● SANTA CLARA, CALIFORNIA 95054 ● PHONE (408 748-3585 ● FAX (510) 489-6372 DOC-EMC700 7/9/04 Electromagnetic Compatibility Criteria Test Report For the Digital Receiver Technology, Inc. DRT1183C (Base Station) Tested under The FCC Verification Rules Contained in Title 47 of the CFR, Part 90 for Private Land Mobile Radio Services MET Report: EMC31505B-FCC90 Rev. 2 January 25, 2012 Prepared For: Digital Receiver Technology, Inc. 20250 Century Blvd., Suite 500 Germantown, MD 20874 Prepared By: MET Laboratories, Inc. 914 W. Patapsco Ave. Baltimore, MD 21230 Electromagnetic Compatibility Digital Receiver Technology, Inc. Cover Page DRT1183C (Base Station) CFR Title 47 Part 90 MET Report: EMC31505B-FCC90 Rev. 2 © 2012, MET Laboratories, Inc. Page ii of vi DOC-EMC700 7/9/04 Electromagnetic Compatibility Criteria Test Report For the Digital Receiver Technology, Inc. DRT1183C (Base Station) Tested under The FCC Verification Rules Contained in Title 47 of the CFR, Part 90 for Private Land Mobile Radio Services MET Report: EMC31505B-FCC90 Rev. 2 Len Knight, Project Engineer Jennifer Warnell Electromagnetic Compatibility Lab Documentation Department Engineering Statement: The measurements shown in this report were made in accordance with the procedures indicated, and the emissions from this equipment were found to be within the limits applicable. I assume full responsibility for the accuracy and completeness of these measurements, and for the qualifications of all persons taking them. It is further stated that upon the basis of the measurements made, the equipment tested is / is not capable of operation in accordance with the requirements of Part 90 of the FCC Rules under normal use and maintenance. Shawn McMillen, Wireless Manager, Electromagnetic Compatibility Lab Electromagnetic Compatibility Digital Receiver Technology, Inc. Report Status DRT1183C (Base Station) CFR Title 47 Part 90 MET Report: EMC31505B-FCC90 Rev. 2 © 2012, MET Laboratories, Inc. Page iii of vi DOC-EMC700 7/9/04 Report Status Sheet Revision Report Date Reason for Revision  November 17, 2011 Initial Issue. 1 January 18, 2012 Revised to reflect engineer corrections. 2 January 25, 2012 Revised to reflect customer corrections. Electromagnetic Compatibility Digital Receiver Technology, Inc. Terms and Abbreviations DRT1183C (Base Station) CFR Title 47 Part 90 MET Report: EMC31505B-FCC90 Rev. 2 © 2012, MET Laboratories, Inc. Page iv of vi DOC-EMC700 7/9/04 Table of Contents 1. Executive Summary .................................................................................................................................................... 1 1.1. Testing Summary ................................................................................................................................................... 2 2. Equipment Configuration........................................................................................................................................... 3 2.1. Overview ................................................................................................................................................................ 4 2.2. References .............................................................................................................................................................. 5 2.3. Test Site ................................................................................................................................................................. 5 2.4. Description of Test Sample .................................................................................................................................... 5 2.5. Equipment Configuration ....................................................................................................................................... 5 2.6. Support Equipment ................................................................................................................................................ 5 2.7. Mode of Operation ................................................................................................................................................. 6 2.8. Method of Monitoring EUT Operation .................................................................................................................. 6 2.9. Modifications ..............................................................…

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