MMASD225V2DATA MODULE

User’s Guide SD-225 Series 16 Channel UHF/VHF Data Radio www.midlandradio.com SD-225 User’s Guide 2 © 2006, Midland Radio Corporation FCC RF EXPOSURE COMPLIANCE REQUIREMENTS FOR OCCUPATIONAL USE ONLY The Federal Communications Commission (FCC), within its action in General Docket 93-62, November 7, 1997, has adopted a safety standard for human exposure to Radio Frequency (RF) electromagnetic energy emitted by FCC regulated equipment. Midland Radio Corporation subscribes to the same safety standard for the use of its products. Proper operation of this radio will result in user exposure far below the Occupational Safety and Health Act (OSHA) and FCC limits.  DO NOT transmit for more than 50% of total use time (50% duty cycle). Transmitting more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded.  This radio is NOT approved for use by the general population in an uncontrolled environment. This radio is restricted to occupational use, work related operations only, where the radio operator must have the knowledge to control the user’s exposure conditions for satisfying the higher exposure limit allowed for occupational use.  The antenna used with this radio should not have gain of more than 6 dBi. Make sure no one is closer than 20 inches to the antenna when transmitting. The radio is transmitting when the red LED on the cover of the radio is illuminated. You can cause the radio to transmit by grounding pin 3 on the radio connector.  These are required operating conditions for meeting FCC RF exposure compliance. Failure to observe these restrictions means violation. SD-225 User’s Guide Contents Conventions and Symbols in this Book...................................4 Disclaimer................................................................................4 Safety.......................................................................................4 Introduction..............................................................................6 Radio Models.......................................................................6 Radio Features.....................................................................6 Recommended Accessories and Options............................7 Radio Connections...................................................................8 Connection Overview...........................................................8 External Interface...............................................................10 DB9 Radio Interface Connector Details.............................10 Setup and Operation..............................................................12 Mounting.............................................................................12 Channel Selection..............................................................12 Status LED.........................................................................13 Specifications.........................................................................14 Warranty Statement...............................................................15 © 2006, Midland Radio Corporation 3 SD-225 User’s Guide Conventions and Symbols in this Book  This symbol marks a “caution”. Cautions are special notices which you should read and follow carefully to avoid possible damage to your equipment and to avoid potential danger to yourself or other people. ! This symbol marks an “important point”. Important points are specific instructions which should be followed closely for proper operation.  This symbol marks a “note”. Notes are hints or tips which offer additional information to help you. Disclaimer Midland Radio Corporation is committed to continuous quality improvements, for this reason specifications may change without prior notice. Every effort has been made to ensure that the information in this document is complete, accurate, and up-to-date. Midland assumes no responsibility for the results of errors beyond its control. The manufacturer of this equipment also cannot guarantee that changes in the equipment made by unauthorized people will not affect the transceiver’s performance or functions. Safety Your SD-225 data radio has been carefully designed to give you years of safe, reliable performance. As with all electrical equipment, however, there are a few basic precautions you should take to avoid injury to yourself or damage to the radio:  Read the instructions in this book carefully. Be sure to save it for future reference.  Read and follow all warning and instruction labels on the radio itself.  Do not operate the radio near unshielded electrical blasting caps or in an explosive atmosphere. 4 © 2006, Midland Radio Corporation SD-225 User’s Guide  Do not operate the transmitter of any radio unless all RF connectors are secure.  All equipment must be properly grounded for safe operation.  Do not allow children to operate or play with or near the radio equipment.  Never attempt to service the radio yourself. All equipment should be serviced by a qualified technician. Contact you local dealer or communications coordinator for assistance.  Do not allow the antenna to touch or come in very close proximity with the eyes, face, or any exposed body parts while the radio is transmitting.  The above warning list is not intended to include all hazards that may be encountered when using this radio. © 2006, Midland Radio Corporation 5 SD-225 User’s Guide Introduction Congratulations! By choosing the Midland SD-225 data radio, you have selected a flexible, easily configured communication device. Its rugged design will provide years of reliable service and exceptional performance. Radio Models The SD-225 data radio is available in three frequency ranges. SD-225V2: 5 W, VHF high band, 148-174 MHz SD-225U1: 5 W, UHF high band, 400-440 MHz SD-225U2: 5 W, UHF high band, 440-480 MHz Radio Features The SD-225 series data radio is a programmable, synthesized 16 channel radio featuring: 5 Compact, rugged die cast enclosure. 5 Tri-c…

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5900 Parretta Drive ● KANSAS CITY, MISSOURI ● 64120 TELEPHONE: (816) 241-8500 ● FAX: (816) 241-5713 EMAIL: [email protected] WEBSITE: www.midlandradio.com Midland Radio Corporation 5900 Parretta Drive, Kansas City, MO. 64120 Phone: (816) 241-8500 Fax: (816) 241-5713 Website: wwwl.midlandradio.com E-Mail: [email protected] June 26, 2007 Equipment Authorization Division Office of Engineering and Technology Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 Ref: FCC ID: MMASD225V2 Request for Confidentiality Dear Sirs: With regard to the referenced application, Midland Radio Corporation is requesting confidentiality of certain sections of the accompanying documents. The documents for which Midland Radio Corporation is requesting confidentiality are: Schematic Diagram(digitalsschematics.pdf, RFScjematics.pdf) Block Diagram(Blockdiagram.pdf) Operational Descriptions(OperationalDesc.pdf) This request is made under the provisions of Section 0.457(d) of the Commission’s Rules, and Section 552(b)(4) of the Freedom of Information Act. The material for which confidentiality is requested falls within the scope of Section 552(b)(4) as trade secrets and includes material covered by Section 0.459 of the Commission’s Rules. Sincerely, Thomas L. Bishop, engineer

The SD-225 series UHF/VHF transceiver cover the frequency bands, U1(400-440 MHz) U2(440-480 MHz) and V2(148-174 MHz). They should not require any special alignment, unless repairs are performed on the transceiver portion. Should repairs be necessary, use the “Alignment Points Diagram", in conjunction with the following procedures. An extender board is required in order to separate the digital and RF PCB’s to allow access to the alignment points. RECEIVER RX VCO The RX VCO is pre-tuned at factory and no further adjustment should be required. To identify a defective of RX VCO, check the VCO control voltage as follows. 1. Set the unit to the highest receive frequency, 440MHz(U1), 470MHz(U2) or 174MHz(V2) and check the VCO control voltage is under 10.0 volts. If it’s over 10.0 volts, adjust C308 of RX VCO to obtain 10.0 volts as measured at TP1. 2. Set the unit to the lowest receive frequency, 400MHz(U1), 440MHz(U2) or 148MHz(V2) and check that the VCO voltage is above 1.5 volts. If it’s less than 1.5 volts, adjust C308 to obtain 1.5 volts as measured at TP1. Note: Use TP1 to measure the voltage. Audio Output Level Adjustment 1. Select a receiver channel that is programmed for standard band (25kHz) operation. 2. Prepare the standard test signal as follows. Set the RF signal generator to the receiver frequency. Set the AF modulation signal to 1 kHz at ±3kHz deviation. Set the RF output level of the RF signal generator to –47dBm. 3. Apply a standard test signal to the receiver antenna terminals. 4. Adjust RV401 for the specific audio output level (1 Vrms into 8 ohms is default). Level Shifter for Modem Option Board 1. Select a receiver channel which is programmed for standard band (25kHz) operation. 2. Apply a standard test signal for to the antenna terminal of the receiver. 3. Adjust RV403 until the center voltage of the demodulated signal (1KHz sine wave) at TP401 (IC416 pin 8) is 2.5 Vdc. 4. Select a receiver channel which is programmed for narrow band (12.5kHz) operation. 5. Apply a standard narrow band test signal (decrease deviation of AF modulation signal to ±1.5KHz) to the antenna terminal of the receiver. 6. Check the center voltage of the demodulated signal at TP401 (IC416 pin 8) is 2.5 Vdc. If necessary, adjust RV403 until the center voltage is near 2.5 Volts for each bandwidth (25KHz / 12.5KHz). TRANSMITTER Connect the unit to a service monitor with the power meter set to the 10 W scale (or autorange) TCXO Set the radio to a mid-range frequency 420MHz(U1), 460MHz(U2) or 160MHz(V2) MHz, adjust TCXO1 for a reading of ±200Hz of the programmed frequency. TX VCO The TX VCO is pre-tuned at factory and no further adjustment should be required. To identify a defective of TX VCO, check the VCO control voltage as follows. 1. Set the unit to the highest transmit frequency, 440MHz(U1), 470MHz(U2) or 174MHz(V2) and check the VCO control voltage is under 10.0 volts. If it’s over 10.0 volts, adjust C208 of TX VCO to obtain 10.0 volts as measured at TP1. 2. Set the unit to the lowest transmit frequency, 400MHz(U1), 440MHz(U2) or 148MHz(V2) and check that the VCO voltage is above 1.5 volts. If it’s less than 1.5 volts, adjust C208 to obtain 1.5 volts as measured at TP1. Note: Use TP1 to measure the voltage. CTCSS, DCS & TX Deviation and Balance Adjustment 1. Set the unit to a mid range frequency and a CTCSS of 67Hz. Key the radio and adjust RV402 for desired CTCSS tone deviation. 2. Switch to a channel with the same frequency and CTCSS of 250.3Hz. Key the radio and adjust RV1 to the same CTCSS tone deviation same as step 1. 3. Switch between the 67Hz channel and the 250.3Hz channel and adjust RV1 until the deviation is the same on both channels. It may be necessary to readjust RV402 to achieve the desired deviation. 4. Set the unit to a mid range frequency and apply a 100 mVrms of 400 Hz audio to the TX data input (pin 1 on the DB9 connector). 5. Increase the signal level to 20 dB from standard level (1Vrms). 6. Monitor the demodulated signal from service monitor. Adjust RV1 to make the monitored signal a balanced square wave. 7. Reduce input signal to the standard level (100mVrms) and adjust RV2 for the standard deviation. APC 1. Set the unit to a mid range frequency high power channel and adjust RV4 for 5W. 2. Set the unit to a mid range frequency low power channel and adjust RV3 for 1W. SQUELCH ADJUSTMENT RSSI squelch adjustment using ACC-2025 & ACC-917 The factory default squelch level for all the SD-225 series is approximately: 1. Squelch open (un-mute) at -114 to -113dBm (0.45 - 0.5μV of RX signal strength) 2. Squelch close (mute) at -117 to -116dBm (0.3 - 0.35μV of RX signal strength) Changing the default squelch settings requires use of the programming cable, software and a RF signal generator. A radio communications test set is recommended. 1. Set the channel switch, SW401 for channel 1. Connect the ACC-2025 to the PC USB port and the SD-225. 2. Run the ACC-917 software and select squelch mode. The SD-225 will initially be set to channel 1. To select a different channel, use the “Change Channel” and “SET” buttons. 3. Select “Custom Define” from the squelch window of the ACC-917. 4. Adjust the RF signal generator for the desired signal strength to OPEN squelch (e.g. default setting is -113dBm, that is equivalent to 0.5μV) 5. Press “SET(OPEN)” button, the LED indicator will flash 3 times. 6. Adjust the RF signal generator for the desired signal strength to CLOSE squelch (e.g. default setting is -116dBm, that is equivalent to 0.35μV) 7. Press “SET(CLOSE)” button, the LED indicator will flash 2 times. 8. Press “SAVE” button, the LED indicator will flash once. 9. Press the “CLOSE” button. Test for the desired level by increasing or decreasing the RF signal to the levels set for squelch (LED will be OFF when squelch is closed and ON when squelch is open). NOTE: The difference of RF signal strength between the un-mute and mute levels should be greater than 2 dB and at least equal to 0.15μV (-123.…

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Item Part No. Value Part Name Qty Reference Manufacturer 1 UG-1094/U(F) BNC CONNECTOR 1 SAMWOO 21 AIM TECHNOLOGY 31 AIM TECHNOLOGY 41 AIM TECHNOLOGY 51 AIM TECHNOLOGY 61 AIM TECHNOLOGY 71 AIM TECHNOLOGY 81 AIM TECHNOLOGY 91 AIM TECHNOLOGY 104 AIM TECHNOLOGY 112 AIM TECHNOLOGY 121 AIM TECHNOLOGY Item Part No. Value Part Name Qty Reference Manufacturer 1 RC1005J000CS 0 Chip resistor - 0402 (LINK) 8 LK6 LK11 LK4 LK13 LK8 LK15 LK9 LK17 SAMSUNG 2 RC1005J000CS 0 Chip resistor - 0402 3 R11 R27 R108 SAMSUNG 3 RC1005J100CS 10 Chip resistor - 0402 1 R53 SAMSUNG 4 RC1005J180CS 18 Chip resistor - 0402 1 R33 C62 SAMSUNG 5 RC1005J220CS 22 Chip resistor - 0402 1 R64 SAMSUNG 6 RC1005J390CS 39 Chip resistor - 0402 1 R62 SAMSUNG 7 RC1005J470CS 47 Chip resistor - 0402 1 R17 SAMSUNG 8 RC1005J510CS 51 Chip resistor - 0402 2 R68 R98 SAMSUNG 9 RC1005J101CS 100 Chip resistor - 0402 9 R1-2 R12-14 R38 R70 R88 R120 SAMSUNG 10 RC1005J121CS 120 Chip resistor - 0402 2 R5-6 SAMSUNG 11 RC1005J221CS 220 Chip resistor - 0402 3 R49 R56 R31 SAMSUNG 12 RC1005J271CS 270 Chip resistor - 0402 1 R39 SAMSUNG 13 RC1005J301CS 300 Chip resistor - 0402 4 R34 R66-67 R32 SAMSUNG 14 RC1005J681CS 680 Chip resistor - 0402 1 R55 SAMSUNG 15 RC1005J102CS 1K Chip resistor - 0402 4 R85 R87 R69 R47 SAMSUNG 16 RC1005J122CS 1.2K Chip resistor - 0402 5 R3-4 R22 R28 R97 SAMSUNG 17 RC1005J152CS 1.5K Chip resistor - 0402 1 R48 SAMSUNG 18 RC1005J182CS 1.8K Chip resistor - 0402 1 R73 SAMSUNG 19 RC1005J222CS 2.2K Chip resistor - 0402 2 R54 R72 SAMSUNG 20 RC1005J242CS 2.4K Chip resistor - 0402 1 R9 SAMSUNG 21 RC1005J332CS 3.3K Chip resistor - 0402 1 R50 SAMSUNG 22 RC1005J362CS 3.6K Chip resistor - 0402 1 R101 SAMSUNG 23 RC1005J392CS 3.9K Chip resistor - 0402 1 R10 SAMSUNG 24 RC1005J472CS 4.7K Chip resistor - 0402 3 R95 R90 R30 SAMSUNG 25 RC1005J562CS 5.6K Chip resistor - 0402 2 R96 R29 SAMSUNG 26 RC1005J682CS 6.8K Chip resistor - 0402 1 R36 SAMSUNG 27 RC1005J103CS 10K Chip resistor - 0402 15 R18 R20 R24 R26 R46 R7 R82 R8 R16 R100 SAMSUNG R105-106 R110-112 28 RC1005J123CS 12K Chip resistor - 0402 2 R52 R35 SAMSUNG 29 RC1005J203CS 20K Chip resistor - 0402 4 R23 R102-103 R109 SAMSUNG 30 RC1005J223CS 22K Chip resistor - 0402 1 R19 SAMSUNG 31 RC1005J333CS 33K Chip resistor - 0402 1 R21 SAMSUNG 32 RC1005J473CS 47K Chip resistor - 0402 2 R91 R15 SAMSUNG 33 RC1005J513CS 51K Chip resistor - 0402 1 R94 SAMSUNG 34 RC1005J104CS 100K Chip resistor - 0402 1 R93 SAMSUNG 35 RC1005J184CS 180K Chip resistor - 0402 1 R92 SAMSUNG 36 RC1005J474CS 470K Chip resistor - 0402 2 R86 R71 SAMSUNG 37 RC1005J684CS 680K Chip resistor - 0402 1 R25 SAMSUNG 38 RC1005J105CS 1M Chip resistor - 0402 2 R107 R51 SAMSUNG 39 RC1005J475CS 4.7M Chip resistor - 0402 1 R57 SAMSUNG 40 RC1608F683CS 68K Chip resistor - 0603 2 R58 R60 SAMSUNG 41 RC1608F104CS 100K Chip resistor - 0603 2 R59 R61 SAMSUNG 42 RC2012J000CS 0 Chip resistor - 0805 1 R42 SAMSUNG 43 RC2012J2R2CS 2R2 Chip resistor - 0805 3 R43-45 SAMSUNG 44 RC2012J474CS 470K Chip resistor - 0805 3 R40-41 R65 SAMSUNG 45 0.1 Chip resistor - 1218 1 R63 YAGEO 46 RH03ADC14X 10KB VRES 2 RV3-4 ALPS 47 RH03ADCS4X 47KB VRES 1 RV1 ALPS 48 RH03ADC15X 100KB VRES 1 RV2 ALPS 49 GRM1555C1H6R0D 6pF Chip ceramic cap. - 0402 1 C8 MURATA 50 GRM1555C1H6R8D 6.8pF Chip ceramic cap. - 0402 1 C33 MURATA 51 GRM1555C1H100D 10pF Chip ceramic cap. - 0402 3 C5 C21 C24 MURATA 52 GRM1555C1H120J 12pF Chip ceramic cap. - 0402 1 C25 MURATA 53 GRM1555C1H130J 13pF Chip ceramic cap. - 0402 1 C29 MURATA 54 GRM1555C1H150J 15pF Chip ceramic cap. - 0402 1 C77 MURATA 55 GRM1555C1H200J 20pF Chip ceramic cap. - 0402 2 C30 C100 MURATA 56 GRM1555C1H270J 27pF Chip ceramic cap. - 0402 1 C78 MURATA 57 GRM1555C1H300J 30pF Chip ceramic cap. - 0402 1 C70 MURATA 58 GRM1555C1H330J 33pF Chip ceramic cap. - 0402 2 C79 C28 MURATA 59 GRM1555C1H470J 47pF Chip ceramic cap. - 0402 1 C102 MURATA 60 GRM1555C1H510J 51pF Chip ceramic cap. - 0402 1 C32 MURATA 61 GRM1555C1H820J 82pF Chip ceramic cap. - 0402 2 C73 C64 MURATA 62 GRM1555C1H221J 220pF Chip ceramic cap. - 0402 4 C9 C18 C49 C101 MURATA 63 GRM1555C1H471J 470pF Chip ceramic cap. - 0402 20 C42-44 C19 C48 C53 C55-59 C20 C7 C89-90 MURATA C92 C27 C13 C60 C112 64 GRM155R71H102K 0.001uF Chip ceramic cap. - 0402 10 C15 C23 C50 C71 C75 C81 C98 C108-109 C114 MURATA 65 GRM155R71H472K 0.0047uF Chip ceramic cap. - 0402 2 C93-94 MURATA 66 GRM155R71E103K 0.01uF Chip ceramic cap. - 0402 8 C86 C11 C69 C45 C103 C80 C84 C119 MURATA D-SUB CONN.PACKING(9P) RUBBER SHEET 1.0T RF BOARD ASS'Y POWER CAN SPTE 0.3T RF CAN SPTE 0.3T POST PILLER BSBM NI-PL (M3) D-SUB CONN. POST BSBM NI-PL 4.0 VCO-CAN SPTE O.3T DD-CAN SPTE 0.3T HEAT SINK BSP 1.0T NI-PL MAIN SHEILD SPTE 0.3T Bill of the Material for SD225 VHF2 Mechanical ASS'Y UPPER COVER BOTTOM COVER 67 GRM155R61A104K 0.1uF Chip ceramic cap. - 0402 17 C14 C10 C26 C46 C72 C74 C76 C85 C87 C95 MURATA C97 C111 C116 C118 C120 C130-131 68 0.22uF Chip ceramic cap. - 0402 1 C113 MURATA 69 CL10C130JB8NNNC 13pF Chip ceramic cap. - 0603 1 C66 SAMSUNG 70 CL10C180JB8NNNC 18pF Chip ceramic cap. - 0603 1 C65 SAMSUNG 71 CL21C4R7BCAANNC 4.7pF Chip ceramic cap. - 0805 1 C61 SAMSUNG 72 CL21C6R8CBAANNC 6.8pF Chip ceramic cap. - 0805 1 C35 SAMSUNG 73 CL21C200JBANNNC 20pF Chip ceramic cap. - 0805 2 C36 C39 SAMSUNG 74 CL21C390JBANNNC 39pF Chip ceramic cap. - 0805 1 C37 SAMSUNG 75 CL21C470JBANNNC 47pF Chip ceramic cap. - 0805 1 C38 SAMSUNG 76 CL21C102KBCNNNC 0.001uF Chip ceramic cap. - 0805 2 C40 C34 SAMSUNG 77 CL21B474KOFNNNE 0.47uF Chip ceramic cap. - 0805 1 C54 SAMSUNG 78 CL21B105KOFNNNE 1uF Chip ceramic cap. - 0805 3 C22 C68 C99 SAMSUNG 79 ECHU1H103JX5 0.01uF METAL-POLY CAP 1 C3 PANASONIC 80 ECHU1C473JX5 0.047uF METAL-POLY CAP 1 C2 PANASONIC 81 ECPU1C474MA5 0.47uF METAL-POLY CAP 1 C1 PANASONIC 82 TCSVN1D474KAAR 0.47uF/20V Tantalum Capacitor - A type 1 C51 SAMSUNG 83 TCSVS0J105MPAR 1uF/6.3V Tantalum Capacitor - P type 1 C128 SAMSUNG 84 TCSVS1D225MAAR 2.2uF/20V Tantalum Capacitor - A type 1 C12 SAMSUNG 85 TCSVS1A475MAAR 4.7uF/10V Tantalum Capacitor - A …

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FCC PART 90 TEST REPORT APPLICANT MIDLAND RADIO CORPORATION 5900 PARRETTA DRIVE KANSAS CITY MO 64120 USA FCC ID MMASD225V2 MODEL NUMBER SD225V2 PRODUCT DESCRIPTION DATA MODULE DATE SAMPLE RECEIVED 6/06/2007 DATE TESTED 6/22/2007 TESTED BY Richard Block APPROVED BY Mario de Aranzeta TIMCO REPORT NO. MIDLANDRADIO_MMA\2232AUT7TestReport.doc TOTAL PAGES 31 TEST RESULTS PASS FAIL THE ATTACHED REPORT SHALL NOT BE REPRODUCED EXCEPT IN FULL WITHOUT THE WRITTEN APPROVAL OF TIMCO ENGINEERING, INC. TABLE OF CONTENTS 849 NW STATE ROAD 45 NEWBERRY, FL 32669 USA PH: 888.472.2424 OR 352.472.5500 FAX: 352.472.2030 EMAIL: [email protected] HTTP: //WWW.TIMCOENGR.COM Certificate # 0955-01 Applicant: MIDLAND RADIO FCC ID: MMASD225V2 Report: M\MidlandRadio\MMA_\2232AUT7\2232AUT7TestReport.doc Page 2 of 30 TABLE OF CONTENTS STATEMENT OF COMPLIANCE.................................................................................. 3 GENERAL INFORMATION .......................................................................................... 4 TEST PROCEDURE.................................................................................................... 5 RF POWER OUTPUT .................................................................................................. 6 MODULATION CHARACTERISTICS ............................................................................ 7 MODULATION CHARACTERISTICS (Audio Frequency Plot)......................................... 8 VOICE MODULATED COMMUNICATION EQUIPMENT (Audio Low Pass Filter)............ 9 AUDIO INPUT VERSUS MODULATION ..................................................................... 10 OCCUPIED BANDWIDTH.................................................................................... .12 OCCUPIED BANDWIDTH TEST PROCEDURE.........................................................13 OCCUPIED BANDWIDTH PLOTS.......................................................................14-17 SPURIOUS EMISSION AT ANTENNA TERMINALS (Conducted)............................18-19 METHOD OF MEASURING CONDUCTED SPURIOUS EMISSIONS ............................ 20 FIELD STRENGTH OF SPURIOUS EMISSIONS...................................................21-24 FREQUENCY STABILITY...........................................................................................25 TRANSIENT FREQUENCY BEHAVIOUR...............................................................26-29 EMC EQUIPMENT LIST ........................................................................................... 30 Applicant: MIDLAND RADIO FCC ID: MMASD225V2 Report: M\MidlandRadio\MMA_\2232AUT7\2232AUT7TestReport.doc Page 3 of 30 STATEMENT OF COMPLIANCE This equipment has been tested in accordance with the standards identified in the referenced test report. To the best of my knowledge and belief, these tests were performed using the measurement procedures described in this report and demonstrate that the equipment complies with the appropriate standards. No modifications were made to the equipment during testing in order to demonstrate compliance with these standards. I attest that the necessary measurements were made by me or under my supervision, at Timco Engineering, Inc. located at 849 N.W. State Road 45, Newberry, Florida 32669 USA. Certificate #0955-01 Authorized by: S. S. Sanders Signature: <S. S. Sanders> Date: July 11, 2007 Applicant: MIDLAND RADIO FCC ID: MMASD225V2 Report: M\MidlandRadio\MMA_\2232AUT7\2232AUT7TestReport.doc Page 4 of 30 GENERAL INFORMATION DUT Specification The test results relate only to the items tested. DUT Description DATA TRANSCEIVER MODULE FCC ID MMASD225V2 Model Number SD225V2 Serial Number N/A Operating Frequency 150.05 – 173.925 No. of Channels 16 Type of Emission F3E, F2D Modulation FM 110–120Vac/50– 60Hz DC Power DUT Power Source Battery Operated Exclusively Prototype Pre-Production Test Item Production Fixed Mobile Type of Equipment Portable Antenna Connector BNC Test Conditions The temperature was 26ºC with a relative humidity of 50%. Modification to the DUT None Test Exercise The DUT was placed in continuous transmit mode. Applicable Standards TIA 603-C:2004, FCC CFR 47 Part 90 Test Facility Timco Engineering Inc. at 849 NW State Road 45 Newberry, FL 32669 USA. Applicant: MIDLAND RADIO FCC ID: MMASD225V2 Report: M\MidlandRadio\MMA_\2232AUT7\2232AUT7TestReport.doc Page 5 of 30 TEST PROCEDURE Power Line Conducted Interference: The procedure used was ANSI/TIA 603-C:2004 using a 50uH LISN. Both lines were observed with the DUT transmitting. The bandwidth of the spectrum analyzer was 10 kHz with an appropriate sweep speed. Bandwidth 20 dB: The measurements were made with the spectrum analyzer's resolution bandwidth (RBW) = 1 MHz and the video bandwidth (VBW) = 3 MHz and the span set as shown on plot. Power Output: The RF power output was measured at the antenna feed point using a peak power meter. Antenna Conducted Emissions: The RBW = 100 kHz, VBW = 300 kHz and the span set to 10.0 MHz and the spectrum was scanned from 30 MHz to the 10 th harmonic of the fundamental. Above 1 GHz the resolution bandwidth was 1 MHz and the VBW = 3 MHz and the span to 50 MHz. Radiation Interference: The test procedure used was ANSI C63.4-2003 using an Agilent spectrum receiver with pre-selector. The bandwidth (RBW) of the spectrum receiver was 100 kHz up to 1 GHz and 1 MHz above 1 GHz with an appropriate sweep speed. The VBW above 1 GHz was 3 MHz. The analyzer was calibrated in dB above a micro volt at the output of the antenna. Applicant: MIDLAND RADIO FCC ID: MMASD225V2 Report: M\MidlandRadio\MMA_\2232AUT7\2232AUT7TestReport.doc Page 6 of 30 RF POWER OUTPUT Rule Part No.: Part 2.1046(a), Test Requirements: Method of Measurement: RF power is measured by connecting a 50-ohm, resistive wattmeter to the RF output connector. With a nominal battery voltage, and the transmitter properly adjusted the RF output measures: Test Setup Diagram: Test Data: OUTPUT POWER: HIGH – 5.00 Watts LOW - 1.00 Watts Par…

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