MMAGXT400FRS/GMRS COMBINATION

GXT-400 GMRS/FRS Radio with Weather Band Receive r X-TRA TALK ® OWNER'S MANUAL www.midlandradio.com TM ® Model GXT-400 Page 2www.midlandradio.com TABLE OF CONTENTS Introduction3 Important Notice, FCC Licensing4 LCD Display5 Controls5 Battery Installation6 Charging the Batteries7 Operations8 - 12 External Speaker/Microphone Jack13 Installing the Belt Clip13 Problems & Solutions14 Use and Care14 Specifications and Frequency Charts15 Warranty Information16 MIDLAND Family Products17 ® Model GXT-400 Page 3www.midlandradio.com Welcome to the world of Midland electronics Congratulation on your purchase of a quality MIDLAND product. Your GXT-400 represents the state-of-the-art in high-tech engineering. Designed for General Mobile Radio Service operation, this compact package is big in performance. It is a quality piece of electronic equipment, skillfully constructed with the finest components. The circuitry is all solid-state and mounted on a rugged printed circuit board. Your GXT-400 is designed for reliable and trouble-free performance. Features - 22 GMRS/FRS Channel with 38 CTCSS Code - VOX - 3-selectable CALL Tone - Weather (WX) Band Receiver - Vibrate-Alert - SCAN function - MONITOR function - Roger Beep Tone This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions : (1) this device does not cause harmful interference, and (2) this radio must accept any interference that may cause undesired operation. To maintain compliance with FCC’s RF exposure suidelines, for body-worn operation, this radio has been tested and meets the FCC RF exposure guidelines when used with Midland Radio Corp. accessories supplied or designated for this product. Use of other accessories may not ensure compliance with FCC RF exposure guidelines. (Tested with Headset Model: AVP-1) ® Model GXT-400 Page 4www.midlandradio.com IMPORTANT NOTICE, FCC LICENCE REQUIRED The GXT-400 operate on GMRS (General Mobile Radio Service) frequencies which require an FCC (Federal Communications Commission) license. Information on how to apply for a license is included in the owner's manual. A user must be licensed prior to operating on channels 1 - 7 or 15 - 22, which com- prise the GMRS channels of the GXT-400. Serious penalties could result for unli- censed use of GMRS channels, in violation of FCC rules, as stipulated in the Communications Act's Sections 501 and 502 (amended). Licensed users will be issued a call sign by the FCC which should be used for station identification when operating the GXT-400. GMRS users should also cooperate by engaging in permissible transmissions only, avoiding channel interference with other GMRS users, and being prudent with the length of their transmission time. Questions regarding the license application should be directed to the FCC at 1- 886-CALL FCC. Additional information is available on the FCC's web-site at www .fcc.gov/wtb/prs/genmbl.html Exposure To Radio Frequency Energy Your Midland radio is designed to comply with the following national and international standards and guidelines regarding exposure of human being to radio frequency electromagnetic energy: - United States Federal Communications Commission, Code of Federal Regulations: 47 CFR part 2 sub-part J - American National Standards Institute (ANSI)/Institute of Electrical & Electronic Engineers (IEEE) C95. 1-1992 - Institute of Electrical and Electronic Engineer (IEEE) C95. 1-1999 Edition - National Council on Radiation Protection and Measurements (NCRP) of the United States, Report 86, 1986 - International Commission on Non-lonizing Radiation Protection (ICNIRP) 1998 To control your exposure and ensure compliance with the general population or uncontrolled environment exposure limits, transmit no more than 50% of the time. The radio generates measurable RF energy exposure only when transmitting. ® Model GXT-400 Page 5www.midlandradio.com CONTROLS LCD DISPLAY 1. LOW BATTERY ICON– Indicates the battery level is low. 2. TRANSMIT (TX) ICON– Indicates the unit is transmitting a signal. 3. VOX– Display during VOX Mode. 4. CHANNEL NUMBER– Changes from 1~22 on GMRS/FRS band and 1~10 on WX band. 5. RECEIVE (RX) ICON– Indicates unit is receiving a transmission. 6. KEY LOCK ICON – Indicates KEY LOCK mode. 7. WX BAND ICON– Indicates when the unit is in WX Band mode. 8. VIBRATE-ALERT ICON– Indicates when the Vibrate-Alert feature is on. 9. CTCSS CODE– Changes from oF~38 as selected by user . 10. TRANSMIT (TX) POWER ICON– Indicates TX Power setting. 11. POWER/VOLUME KNOB– Turn clock- wise to turn the Power On and increase the volume level. Turn counter-clockwise to decrease the volume level and turn the Power Off. 12. PTT Button– Press and hold to transmit voice communication. 13. UPand DOWN Button– Make adjustments in MENU mode. 14. MENU Button– Press to access Menu mode. Press and hold to go to WX Band Receiver mode . 15. CALL/LOCK Button– Press to send a CALL tone signal. Press and hold to set KEYLOCK On/Off. 16. MIC– Built-in microphone. 17. SPEAKER– Built-in speaker. 18. ANTENNA. 19. MONITOR/SCAN Button– Press to enter SCAN mode. Press and hold to enter MONITOR mode 20. EXTERNAL SPEAKER/MIC JACK. 1 2 3 4 5 6 7 8 9 10 11 12 15 16 17 13 19 14 20 18 ® Model GXT-400 Page 6www.midlandradio.com BATTERY INSTALLATION Your GXT-400 radio operates with either 4 AA Alkaline Batteries or optional NiMH Battery Pack. The belt clip should be removed (Page 13) to ease installation or removal. To install the batteries: 1. With the back of the radio facing you, remove the Battery Cover by sliding it down from the unit. 2. Insert 4 AA batteries observing the polarity as shown. Installing the batteries incorrectly will prevent the unit from operating or can damage the unit. 3. Return the Battery Cover by sliding it up from the unit. BATTERY COMPARTMENT BATTERY COMPARTMENT COVER ® Model GXT-400 Page 7www.midlandradio.com CHARGING THE BATTERIES Your GXT-400 is equipped to allow using a rechargeable NiMH battery pack (no…

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MMAGXT400

GXT300/400 TECHNICAL DESCRIPTION Page 1 A). GENERAL DESCRIPTION The GXT300/400 GMRS radio is a self-contained transceiver unit with integral antenna intended for use as a general communication tool. It is designed to operate on all 22 channels allocated by the FCC. This model also features user selectable sub-audible tones for channel quieting. The useable range, while dependent upon terrain and other radio propagation principles, is typically two miles. The GXT300/400 uses the maximum transmit power allowed to help ensure the maximum communication range. Features include: 22 GMRS Channels, 10 channels Weather radio, Channel Monitor, Page and LCD Display. The unit is equipped with an external Headset option connector. Four AA alkaline batteries that are readily available in retail outlets supply operating power. An automatic power savings feature allows the typical standby battery life to extend to more than 10 days. B). FREQUENCY DETERMINING CIRCUITS The fundamental frequency for both the transmitter and the receiver local oscillators are controlled by a phase lock loop (PLL) circuit IC201 (Toshiba TB31202, or equipvalent). The frequency of operation of the FRS voltage controlled oscillator (VCO), composed of Q301 and Q302 operating in cascade is phase locked to a voltage controlled crystal reference (VCXO) operating at 20.95MHz (X202). The VCO is locked to the fundamental of the transmit signal in the transmit mode and is locked to the receive 1 st LO (Fundamental channel frequency minus 21.4MHz) in the receive mode. The crystal reference frequency is shared with the 2 nd LO of 20.95MHz. C). TRANSMITTER CIRCUITS The transmitter amplifies the 0 dBm signal from the VCO to approximately 27dBm that is fed to the antenna. The transmitter is a three stage amplifier composed of Q1,3,4 and Q11. The first two stages are operated class A and the final is operated class B in full saturation to help prevent unwanted amplitude modulation. The fundamental transmit signal is fed through an elliptical low pass filter (5-pole, 2 zero) in order to suppress the harmonics to below –50 dBc. The desired frequency modulation of the carrier is accomplished by modulating the current in the VCO directly with the microphone audio signal. The microphone audio is conditioned with a three- pole high pass filter at 300 Hz (IC5C,D), a hard clipper circuit (IC5B) to limit maximum deviation to +/- 2.5 kHz and a three-pole low pass or splatter filter at GXT300/400 TECHNICAL DESCRIPTION Page 2 2.8 kHz (IC5A). The low pass filter insures that the occupied bandwidth of the FM modulated signal meets FCC requirements under all input conditions. D). RECEIVER CIRCUITS The received signal from the antenna is band limited to 600 Mhz by the transmitter harmonic filter. The desired signal is fed to a low noise amplifier (LNA – Q6) centered from 460 to 470 MHz that provides approximately 10 dB of gain. The output of the LNA is filtered with a Band Pass filter (C41,L16,C43,L17,C15,L5) with pass-band of 460 to 470 MHz and stopband attenuation of 10 dB. The filtered receive signal is one input to the 1 st mixer (Q8), the other mixer input (1 st LO) is the output of the VCO at the desired channel frequency minus 21.4MHz. The output of the mixer is tuned to the 1 st IF of 21.4 MHz. The 1 st IF is transformer coupled for impedance matching to a X-tal filter centered at 21.4MHz with a bandwidth of +/-3.75Hz. The filtered 1 st IF is then amplified by Q9 and fed to the 2 nd mixer input of the multi-function receiver IC (IC1). The 2 nd LO (20.95 MHz) is generated by VCXO that is the reference frequency for the PLL. The 2 nd mixer output of 450 kHz is filtered through a 4 section ceramic filter that in combination with the 21.4MHz X-tal filter provides approximately 50 dB of adjacent channel attenuation. The 450 kHz 2 nd IF is then amplified, limited and fed to a quadrature detector for FM demodulation. The resulting audio output signal is bandpass filtered from 300 to 3 kHz (Q22) and amplified to provide 150mW of audio power (IC2). A squelch circuit is provided (IC1 pins 10 through 11) to mute the receiver noise under low signal conditions. The squelch circuit amplifies and detects noise in a narrow bandwidth at approximately 5 kHz. When the detected noise exceeds a threshold set to trigger at approximately 9 dB SINAD receive signal strength, the audio output is muted. E). TRANSMIT/RECEIVE SWITCH When the radio is in the transmit mode, pin diode switches D13 and D1 are both turned on (representing less than 0.7 ohms). D13 allows the transmit signal to pass to the antenna and D1 shorts one leg of a T matching network (L3, L15 and C4) to ground in the receive path. This results in a parallel tuned circuit high impedance being presented to the transmit signal so that the receive path does not load the transmit signal. In the receive mode, both D13 and D1 are off, resulting in the antenna signal being coupled into the receive LNA through the 50 ohm T matching network and the unwanted load of the transmit final amplifier is reduced to less than 1 pF by D1. F). RADIO CONTROL CIRCUIT A microprocessor (CPU1) is used to control the transceiver. User stimuli is provided through a tack switch for PTT (push to talk), along with the keypad for channel selection, channel monitor, receive volume, and page. Pressing GXT300/400 TECHNICAL DESCRIPTION Page 3 the PTT switch instructs CPU1 to switch to the transmit mode. This is accomplished by loading the proper channel counter information through a 3- wire serial link to the PLL IC (IC201), turning on power to the PLL and VCO, microphone and transmit audio circuits and the transmit RF amplifiers. Pressing the call switch causes the microcontroller to transmit a warbling tone for approximately 3 seconds on the current channel selected that is used to notify another person with FRS radio that you wish to communicate. Pressing the channel Up/Down buttons (active in receive mode only) instructs CPU1 to increment o…

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GXT300/400 SEMICONDUCTOR DESIGNATIONS AND FUNCTIONS Page 1 Designator Description Application CPU1 W741S81A Micro controller D1 KDS114E TX,RX switch D3 KDS114E Squelch temperature compensation D5 KDS114E VOX rectifier D13 KDS114E TX,RX switch D301 KDS114E VCO TX,RX switch IC1 DBL5018 IF IC IC2 LM386 Speaker amplifier IC201 TB31202 PLL IC IC3 XC6201 4V regulator IC4 LM324 OP amp. IC5 LM324 OP amp. IC6 XC6N26 2.6V Reset IC LED1 SML210MT LED for backlit Q1 NE5510279A TX PA Q2 KRC405E RX VCC Mute Q3,4 BFQ67W TX driver Q5 KRC404E CTCSS Limitor Q6 2SC4226 RX LNA Q7 KTA2014E PTT switch Q8 2SC4226 RX MIXER Q9 2SC4083 IFA Q10 KRA306E WX Vcc switch Q11 BFQ67W TX pre-driver Q12 KRC404E Speaker amplifier Vcc switch Q13 KRA226 TX Vcc switch Q14 KRA306E RX Vcc switch Q15 KRA306E TX Power Control Q16 KRA226 Speaker amplifier Vcc switch Q17 KRC405E TX audio Mute Q18 2SC4083 WX VCO Q19 KRC401E VCO TX,RX switch Q20 KRA306E TX Power Control Q21 KRC404E VOX amplifier Q22 KRC4075E Audio aplifier Q23 KRC405E RX audio mute Q24 KRC246S Vibrator Driver Q26 KRC405E RX/TX Switch Q27 2SC4083 WX Mixer Q28 KRC404E Power On/Off Switch Q301 2SC4226 VCO Q302 2SC4226 VCO

GXT300/400 LABORATORY TESTING PROCEDURES Page 1 UNIT TEST - (UNIT ASSEMBLED) TEST PREPARATION 1) Install 4 “AA” alkaline batteries (observe polarity markings). z Left bottom terminal is the system plus polarity z Right upper terminal is the system minus polarity. 2) Turn on unit by pressing the power button. SYSTEM TEST 1) Radiated Transmit and Receive performance may be observed. 2) Audio out & Audio in are available at the Headset jack. LABORATORY TEST - (UNIT UN-ASSEMBLED) TEST PREPARATION 1) Disassemble unit (4 screws – 3 behind batteries). Remove the PCB from the cabinet. 2) Remove the antenna and install a 50 ohm coax cable in its place. 3) Either clip alligator leads or solder test leads to the power supply connections. The positive terminal is the lower left PCB mounting hole. The negative terminal is the lower right PCB mounting hole top of the 20.95MHz X-tal. (battery side view) 4) Connect 6VDC power source to the terminals, observing correct polarity. 5) Connect an 8-ohm load through the Headset jack (3.5mm mono-phone plug). 6) Connect a audio generator with 10uF coupling capacitor through the Headset jack ( 2.5mm mono-phone plug). 7) Select desired channel 1- 22 using CH up/down keypad switch. The rubber keypad may be removed from the front cabinet and used directly on the PCB. GXT300/400 LABORATORY TESTING PROCEDURES Page 2 SPECIFIC TEST METHODS AND GUIDANCE Modulation Characteristics – (paragraph 2.1047(a) of the Rules) FOR TX AUDIO FILTER RESPONSE 1. Connect audio generator with 10uF coupling capacitor to microphone input jack. Press PTT button. 2. Connect RF output with modulation meter. (Filters of modulation meter should be set to a 50Hz to 15KHz.) 3. Adjust audio generator about 5-6mVrms for 0.75KHz modulation. 4. While transmitting, sweep generator and note measurement. 5. Please compensate the back-ground noise level. Modulation Characteristics – (paragraph 2.1047(b) of the Rules FOR TX AUDIO LOW PASS FILTER RESPONSE. 1. Connect audio generator with 10uF coupling capacitor to microphone input jack. Press PTT button. 2. Connect AC voltmeter or other test equipment via jumper wire to TP-9. 3. Adjust audio generator for 200mV. 4. While transmitting, sweep generator and note measurement. Occupied Bandwidth – (paragraph 2.1049(c) of the Rules) 1. Connect an audio frequency sweep generator with 10uF coupling capacitor to microphone input jack. 2. Adjust audio generator to a frequency of 2500Hz and a level of 100mV rms (+16dB above 10-12mV per FCC). 3. With a spectrum analyzer, transmit the radio and monitor the transmitter though an antenna. 4. Note required measuements per FCC. GXT300/400 ALIGNMENT PROCEDURE Page 1 1. REFERENCE TEST EQUIPMENT A. HP8921A Cell site test set or HP8920A, B Communication Test Set with Spectrum Analyzer option. B. Fluke 187 Digital Voltmeter C. HP E3615A Power supply 2. TEST POINT A. ANTENNA : Test point is not prepared. Use antenna contact with ANTENNA_GND_T(antenna ground). B. VCO reference voltage : Test point 1 is prepared. C. RX audio output : Test point SPKOUT is prepared or use ear-jack(3.5mm). D. TX Mic. Input : Test point MICIN is prepared or use ear-jack(2.5mm) with 10uF coupling capacitor. E. Battery Vcc : Test point is not prepared. Please use mechanical contact. F. Up Key : Test point UP is prepared. G. Down Key : Test point DW is prepared. H. Function/Power Key : Test point POWER is prepared. I. Monitor Key : Test point SCAN is prepared. J. PTT Key : Test point PTT is prepared. K. CALL Key : Test point CALL is prepared. Note. : All key can be activated when connect with ground. 3. VCO ALIGNMENT A. Set unit to Channel 1 and connect a voltmeter to TP1 (VCO PD). B. Press & hold PTT. C. Extend L303 until the voltmeter reads 2.0V. D. Cover shield-plate on VCO can and monitor the voltage on TP1. The voltage should be 1.5Vdc +/-0.2Vdc. If the voltage is not 2.0Vdc +/-0.2Vdc, realign L303 until meet to requirement. E. Release PTT button so units is in receiving mode and monitor the voltage on TP1. The voltage should be in the range 2.0Vds +/-0.5V F. Set unit to channel 14. 6. Press & hold the PTT switch and observe the voltage on TP4. The voltage should be 2 – 3,5 Vdc. 7. Release PTT and observe the voltage on TP4. The voltage should read between 2.0 - 3.5 Vdc. Note : VCO shield-can should be soldered after VCO alignment is finished. 4. TRANSMITTER FREQUENCY ALIGNMENT A. Press & hold the PTT button. B. Align CT201 trimmer capacitor such that the output frequency is equal to the channel frequency with a maximum error of +/- 200 Hz. CT201 is located on the left side of 20.95MHz X-tal. GXT300/400 ALIGNMENT PROCEDURE Page 2 5. TRANSMITTER OUTPUT POWER CONFIRMATION A. Set unit to channel 1 and power Hi mode. B. Press & hold the PTT button. C. Transmit power should normally be between 2.8W to 3,1W. D. Set unit to channel 14. E. Press & hold the PTT button. Ensure that Tx Power should be between 0.3-0.6W. 6. TRANSMITTER DEVIATION ALIGNMENT A. Connect an audio generator (600 ohms) to the ear jack. The audio frequency should be set at 1KHz with a level of 200mV RMS. B. Connect an FM deviation meter (communications test set) to Antenna contact. Set the monitor to read peak to peak divided by two [(pk-pk)/2] deviation. Set filter of equipment from 25Hz to 15KHz. C. Press & hold the PTT button. D. Align RV2 for +/- 2.2 kHz deviation (+/-0.1KHz). RV2 is located on the bottom of the VCO shield can. E. Decrease audio generator level until deviation reads +/- 1.5 kHz (approximately 4mV) and record generator level. Level should be between 2 mV and 5 mV. F. Confirm that transmit audio distortion is less than 5%. 7. RECEIVER ALIGNMENT A. Set the output level of the RF signal generator for -47dBm. The generator should be set for 1.5 kHz deviation at 1 kHz audio. B. Set volume level 4 (It is initial.). C. Connect Audio analyzer to SPKOUT. D. Set equipment filter 25Hz to 15KHz. E. Align CF2 to get a maximum output level & a minimum distortion and confirm that …

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HYUNDAI CALIBRATION & CERTIFICATION TECH. CO., LTD. PRODUCT COMPLIANCE DIVISION SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI, KYOUNGKI-DO, 467-701, KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr CERTIFICATE OF COMPLIANCE (SAR EVALUATION) Date of Issue : February 2, 2004 Test Report No.: HCT-SAR04-0201 Test Site : HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. FRN : 0005-8642- 21 Manufacture; Midland Radio Corporation. 1120 Clay St. North Kansas City, MO 64116 FRN : 0005867551 MMAGXT400 Midland Radio Corporation. FCC ID : APPLICANT : EUT Type: 22 CH Combination FRS/GMRS Transceiver. Model(s): GXT-400 Tx Frequency: 462.5500 MHz – 462.7250 MHz (GMRS) 467.5625 MHz – 467.7125 MHz (FRS) Max. SAR Measurement(s): 0.89 mW/g(1g) GMRS Face SAR ; 1.39 mW/g(1g) GMRS Body SAR Max. RF Output Power: 2.004W ERP(33.02 dBm)GMRS ; 0.456W ERP(26.59 dBm) FRS Conducted Power: 3.71W (35.05dBm)GMRS ; 0.83W (27.85dBm) FRS Emission Designator: 11K0F3E Channel Capacity: 22 Application Type: Certification Trade Name(s): Midland FCC Rule Part(s): §95(A)(B), 2(J) This wireless portable device has been shown to be capable of compliance for localized specific absorption rate (SAR) for uncontrolled Environment Occupational exposure limits specified in ANSI/ IEEE Std. C95.1- 1992 and had been tested in accordance with the measurement procedures specified in ANSI/ IEEE Std. C95.3- 1992. (See Test Report). I attest to the accuracy of data. All measurements reported herein were performed by me or were made under my supervision and are correct to the best of my knowledge and belief. I assume full responsibility for the completeness of these measurements and vouch for the qualifications of all persons taking them. Hyundai C-Tech Co., Ltd. Certifies that no party to this application has been denied FCC benefits pursuant to section 5301 of the Anti- Drug Abuse Act of 1998, 21 U.S. C. 853(a) Report prepared by : Ki-Soo Kim Manager of Product Compliance Team This report only responds to the tested sample and may not be reproduced, except in full, without written approval of the HCT Co., Ltd. Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-701,KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr Table of Contents 1.1 SCOPE ---------------------------------------------------------------------------------------------------------- 2.1 INTRODUCTION / SAR DEFINITION --------------------------------------------------------------------- 3.1 SAR MEASUREMENT SET-UP --------------------------------------------------------------------------- 4.1 E-FIELD PROBE SYSTEM --------------------------------------------------------------------------------- 5.1 E-FIELD PROBE CALIBRATION PROCESS -------------------------------------------------------- 6.1 PHANTOM, HOLDER, & EQUIVALENT TISSUE --------------------------------------------------- 7.1 SYSTEM SPECIFICATIONS ------------------------------------------------------------------------------ 8.1 MEASUREMENT PROCESS ------------------------------------------------------------------------------ 9.1 ANSI/ IEEE C95.1 - 1992 RF EXPOSURE LIMITS -------------------------------------------------------- 10.1 MEASUREMENT UNCERTAINTIES ------------------------------------------------------------------- 11.1 TEST DATA SUMMARY ---------------------------------------------------------------------------------- 12.1 SAR TEST EQUIPMENT LIST --------------------------------------------------------------------------- 13.1 CONCLUSION ------------------------------------------------------------------------------------------------ 14.1 REFERENCES -------------------------------------------------------------------------------------------- 3 4 5 6-7 8 9 10 11 12 13 14 15-16 17 18 APPENDIX A – SAR TEST PLOTS APPENDIX B – TEST SETUP PHOTOGRAPHS APPENDIX C – EUT PROFILE PHOTOGRAPHS APPENDIX D – DIPOLE VALIDATION PLOTS APPENDIX E – PROBE CALIBRATION DATA APPENDIX F – DIPOLE CALIBRATION DATA Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-701,KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr SAR MEASUREMENT REPORT 1.1 SCOPE Environmental evaluation measurements of specific absorption rate 1 (SAR) distributions in emulated human head and body tissues exposed to radio frequency(RF) radiation from wireless portable devices for compliance with the rules and regulations of the U.S. Federal Communications Commission (FCC). 2 1. 2 Applicant 2. • FCC ID: MMAGXT400 • EUT Type: 22 CH Combination FRS/GMRS Transceiver. Prototype. • Trade Name: Midland • Model(s): GXT-400 • Tx Frequency: 462.5500 MHz – 462.7250 MHz (GMRS) 467.5625 MHz – 467.7125 MHz (FRS) • Application Type: Certification • Modulation(s): FM • Max SAR Measurement: 0.89 mW/g(1 g) GMRS Face SAR ; 1.39 mW/g(1 g) GMRS Body SAR Figure 1. SAR System • Max. RF Output Power: .456 ERP(26 • Power Supply: (1.5VDC) rgizer / III: Duracell) 1 Specific Absorption Rate (SAR) is a measure of the rate of energy absorption due to exposure to an RF transmitting are used to determine compliance with FCC ET Docket 93-62 2.004W ERP(33.02 dBm)GMRS ; 0W.59 dBm) FRS • Conducted Power: 3.71W (35.05dBm) GMRS ; 0.83W (27.85dBm) FRS (x4) AA Alkaline batteries Manufacture(I: Rocket / II: Ene • Place of Test(s): Hyundai C- TECH. EMC Lab. • Date(s) of Tests: January 29, 2004 • Report No.: HCT-SAR04-0201 Company Name : Midland Radio Corporation Address : 1120 Clay St. North Kansas City, MO 64116 Attention : Mr. Ki Choi / General Manager source (wireless portable device). 2 IEEE/ANSI Std. C95.1-1992 limits Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-…

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Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-701,KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr 7.1 SYSTEM SPECIFICATIONS 7.2 Robotic System Specifications Specifications POSITIONER: Stäubli Unimation Corp. Robot Model: RX90LB Repeatability: 0.02 mm No. of axis: 6 Data Acquisition Electronic (DAE) System Cell Controller Processor: Pentium III Clock Speed: 450 MHz Operating System: Windows NT 4.0 Data Card: DASY3 PC-Board Data Converter Features: Signal Amplifier, multiplexer, A/D converter, and control logic Software: DASY3 software Connecting Lines: Optical downlink for data and status info. Optical uplink for commands and clock PC Interface Card Function: 24 bit (64 MHz) DSP for real time processing Link to DAE3 16 bit A/D converter for surface detection system serial link to robot direct emergency stop output for robot E-Field Probes Model: ET3DV6 S/N: 1798, S/N: 1609 Construction: Triangular core fiber optic detection system Frequency: 10 MHz to 6 GHz Linearity: ± 0.2 dB (30 MHz to 3 GHz) Phantom Phantom: SAM Shell Material: Fiberglass Thickness: 2.0 ± 0.1 mm Tissue Parameters Freq. [MHz] Liquid Liquid Temp [°C] Parameters Target Value Measured Value Deviation [%] Limit [%] ε r 43.5 43.0 -1.15 ±5% Head 21.4 σ 0.87 0.84 -3.45 ±5% ε r 56.7 54.7 -3.53 ±5% 450MHz Body 21.4 σ 0.94 0.93 -1.06 ±5% Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-701,KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr 8.1 MEASUREMENT PROCESS 8.2 System Verification Prior to assessment, the system is verified to the ±10% of the specifications at 450MHz by using the system validation kit. (Graphic Plots Attached) Freq. [MHz] Liquid Liquid Temp [°C] SAR Average Target Value (mW/g) Measured Value (mW/g) Deviation [%] Limit [%] 450 MHz D450V2, S/N: 1007 Head 21.4 1 g 4.9 5.08 +3.67 ±10% 8.3 Dosimetric Assessment Setup The evaluation was performed with the following procedure: 1. The SAR value at a fixed location above the ear point was measured and was used as a reference value for assessing the power drop. 2. The SAR distribution at the exposed side of the head was measured at a distance of 3.9mm from the inner surface of the shell. The area covered the entire dimension of the head and the horizontal grid spacing was 20mm x 20mm. Based on this data, the area of the maximum absorption was determined by spline interpolation. 3. Around this point, a volume of 32mm x 32mm x 34mm was assessed by measuring 5 x 5 x 7 points. On this basis of this data set, the spatial peak SAR value was evaluated with the following procedure: a. The data at the surface were extrapolated, since the center of the dipoles is 2.7mm away from the tip of the probe and the distance between the surface and the lowest measuring point is 1.2mm. The extrapolation was based on a least square algorithm [13]. A polynomial of the fourth order was calculated through the points in z-axes. This polynomial was then used to evaluate the points between the surface and the probe tip. b. The maximum interpolated value was searched with a straight-forward algorithm. Around this maximum the SAR values averaged over the spatial volumes (1g or 10g) were computed using the 3D-Spline interpolation algorithm. The 3D-spline is composed of three one-dimensional splines with the “Not a knot” condition (in x,y, and z directions) [13][14]. The volume was integrated with the trapezoidal algorithm. One thousand points (10 x 10 x 10) were interpolated to calculate the average. c. All neighboring volumes were evaluated until no neighboring volume with a higher average value was found. Fig. 10. SAR Measurement Point in Area Scan Report No.: HCT-SAR04-0201 FCC ID : MMAGXT400 DATE : February 2, 2004 HYUNDAI CALIBRATION & CERTIFICATION TECHNOLOGIES CO., LTD. SAN 136-1, AMI-RI , BUBAL-EUP, ICHEON-SI,KYOUNKI-DO, 467-701,KOREA TEL : +82 31 639 8518 FAX : +82 31 639 8525 www.hct.co.kr 9.1 ANSI/ IEEE C95.1 - 1992 RF EXPOSURE LIMITS HUMAN EXPOSURE UNCONTROLLED ENVIRONMENT General Population (W/kg) or (mW/g) CONTROLLED ENVIRONMENT Occupational (W/kg) or (mW/g) SPATIAL PEAK SAR * (Brain) 1.60 8.00 SPATIAL AVERAGE SAR ** (Whole Body) 0.08 0.40 SPATIAL PEAK SAR *** (Hands / Feet / Ankle / Wrist) 4.00 20.00 Table 2. Safety Limits for Partial Body Exposure NOTES: * The Spatial Peak value of the SAR averaged over any 1 gram of tissue (defined as a tissue volume in the shape of a cube) and over the appropriate averaging time. ** The Spatial Average value of the SAR averaged over the whole-body. *** The Spatial Peak value of the SAR averaged over any…

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