MMA705445NUHF MOBILE TRANSCEIVER

HM35 Series – User’s Manual Rev. 2.0 on 1 March 2004 Page 1 of 32 Midland Model 70-3350 Vehicular VHF Transceiver Model 70-5445 Vehicular UHF Transceiver User’s Manual Copyright © 2004 by Midland Radio Corporation; all rights reserved. This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. HM35 Series – User’s Manual Rev. 2.0 on 1 March 2004 Page 2 of 32 FCC RF EXPOSURE The FCC has adopted a safety standard for human exposure to RF energy. Proper operation of this radio under normal conditions results in user exposure to RF energy below the Occupational Safety and Health Act and Federal Communication Commission limits. Mandatory Safety Instructions to Installers and Users: This radio is NOT approved for use by the general population in an uncontrolled environment. This radio is restricted to occupational use and work related operations only. Radio operators must have the knowledge to control their exposure conditions and the exposure conditions of bystanders and/or passengers to satisfy the lower exposure limit allowed for General Population. To comply with FCC RF exposure limits, DO NOT operate the transmitter of this mobile radio when a person outside the vehicle is within 94 centimeters (38 inches) of the antenna. The antenna supplied by the manufacturer or radio dealer must be mounted at a location such that during radio transmission, no person or persons can come closer than the above indicated minimum safe distance to the antenna, i.e. 94cm. To comply with current FCC RF exposure limits, the antenna must be installed at or exceeding the minimum safe distance stated above, and in accordance with the requirements of the antenna manufacturer or supplier. Vehicle Installation Instructions: The antenna used for this transmitter must be mounted on the center of the roof ONLY and must be installed in vehicle having the following characteristics in order to prevent bystanders and passengers from being exposed to levels exceeding the limits for General Population/Uncontrolled Exposure environment: All passengers must be sitting under a solid metal roof. Rooftop width must be at least 76 inches OR the edges of the physical boundary of the vehicle must be at least 76 inches apart. DO NOT operate the radio without the proper antenna installed. Do not substitute any antenna for the one supplied or recommended by the manufacturer or radio dealer. The antenna gain must not exceed 0 dBd. By not following the antenna recommendations you may be exposing person(s) to excess radio frequency radiation. You may contact your radio dealer or the manufacturer for further instructions. DO NOT transmit more than 50% of total radio use time (50% duty cycle). Transmitting for more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded. This radio is transmitting whenever the TX icon is displayed on the LCD. Pressing the PTT switch on the side of the microphone normally causes the radio to transmit. Note: The preceding information is provided to make you aware of RF exposure and how to ensure that this radio is operated within FCC RF exposure limits. You, as the qualified end-user of this radio device must control the exposure conditions of bystanders to ensure the minimum separation distance, stated above for satisfying FCC RF exposure compliance, is maintained between the antenna and nearby persons. Transmit only when all person(s) are at least the minimum distance from the properly installed, externally mounted antenna. IMPORTANT SAFETY INFORMATION CAUTIONS The antenna connector must be snugly tightened to maintain proper electrical connection and moisture resistance. Equipment must be grounded according to Midland Radio Corporation installation instructions for safe operation. Equipment should be serviced only by a qualified technician. Refer to radio service manual for additional information on installation and safety precautions. WARNING! ! 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 ! DO NOT operate the radio in explosive or flammable atmospheres. The transmitted radio energy could trigger blasting caps or cause an explosion. ! DO NOT allow children to operate or play with this radio. Note: The above warning list is not intended to include all hazards that may be encountered when using this radio. HM35 Series – User’s Manual Rev. 2.0 on 1 March 2004 Page 3 of 32 In this manual... 1 GENERAL INFORMATION FOR THE HM35 SERIES.................................................................................... 5 2 ABOVE ALL... SAFETY! ................................................................................................................................ 6 2.1 Conventions and Symbols Used in This Manual........................................................................................................... 6 2.2 Warnings ....................................................................................................................................................................... 6 2.3 Security ......................................................................................................................................................................... 6 2.3.a General precautions ......................................................................................................................................... 6 2.3.b Operating conditions/usage.............................................................................................................................. 6 2.3.c Installation ........................................................................................................................................................ …

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2 CIRCUIT DESCRIPTION 2.1 General information The HM435 is basically divided into 2 printed circuit boards: Main board and Head. Circuitry and signals can be divided in the following sections: Microprocessor/control Front panel (head) circuitry VCO / Synthesizer (PLL) Transmitter Receiver ON/OFF switch, rear connector and internal connectors Refer to the Block Diagram and the Schematics. 2.2 Microprocessor/control The microprocessor DD5 is constantly operating when the radio is turned ON. It is continuously monitoring the keyboard, the PTT line and other internal inputs such as the squelch detect, etc. When a change occurs, the microprocessor makes the appropriate response according to its program in order to control the all radio functions. On channel change, the Radio emits a beep and the synthesizer is loaded with the correct frequency information. The microprocessor runs off a 8 MHz oscillator which is composed of X3, C353, C354 and R319. When the radio is first turned on, the microprocessor reads the radio status from the EEPROM DD3 which contains all the radio’s parameters. The microprocessor determinates the receive frequency codes, then loads the synthesizer via its pins 42 (line PLL_LE), 43 (line PLL_DATA) and 46 (line PPL_CLK). Pin 40 outputs a PWM signal which is converted by DA18:B into a CC voltage at its output (line RF_PWR_CTRL) which controls the RF output power. Pins 37 and pin 39 outputs a PWM signal which are used, respectively, to generate the Selcall signal (line MCU_SELCALL_PWM) and CTCSS/DCS signal (line MCU_CTCSS_DCS_PWM) as further explained. The digital signals coming from the ADC converters which drive the microprocessor in order to decode the Selcall and CXTCSS/DCS signals are applied, respectively, to pin 59 (line ADC_HI_SPEED_DATA_RX) and pin 60 (ADC_lo_SPEED_DATA_RX). The firmware program interface is made by means of the connector XP3 The microprocessor is fitted with an internal program flash memory as well, therefore functions can be customized, if necessary, upon specific request from the customer. 2.2.a PTT circuit The PTT switching is totally controlled by the two microprocessors (DD5 in the main board and DD800 in the front board in the front panel): when the PTT is pressed, the line AUX_PTT goes low, so the transistor VT806 changes the status of the pin 20 of microprocessor DD800 which is “informed” that the radio is in TX mode (i.e. PTT is pressed), so it changes its output at pin 22 putting the low level at pin 8 of the connector XT802 which is connected to the main PCB with the connector XT2. This means that pin 8 of XT2 (line HANDSET_PTT_TO_MPU) goes low. This line is connected to the VT56 which changes the status of pin 26 of the microprocessor DD5 from hi to low. Now the microprocessor DD5 is also “informed” that the radio is in TX mode, so it can control the +8V voltage which is alternatively fed to the TX or RX stages according to the radio’s status. Pins 29 (line TX_FROM_MCU) and 30 (line RX_FROM_MCU) control the +8V power switches which alternatively outputs this voltage to the RX section (line +8V_RX) with VT42 or to the TX one (line +8V_TX) with VT41. The transistor VT805 is controlled by the pin 19 of the microprocessor DD800 and it is used to eventually disable all the over stated PTT chain according to the radio’s status (e.g. busy lock out, timeout timer etc). HM135 Service Manual Preliminary version Page 5 of 13 2.3 Front panel (head) circuitry The microprocessor DD800 runs off a 8 MHz oscillator which is composed of X800, and R829. DD800 is basically used to control the LCD unit XT80, to decode the commands coming from the front keypad S801 to S808) as well as to switch the front LEDs DA800. It is also used to light up the LCD backlight (VD800 to VD805) as well as for the PTT circuit as over stated. The negative voltage necessary for the LCD is created by a charge pump which consists of VT815, VT813, VT812, VD809 and VD808. The output (line –8V) is fed to the regulator DA804:A which outputs the line VD in order to supply the LCD unit. The hang-up functions work this way: the line AUX_HOOK is connected to the microphone’s hook and it’s normally grounded (microphone hooked). When the mike is removed from its hook, the line AUX_HOOK changes its state driving the transistor VT809. This changes the status of the pin 21 of the microprocessor DD800 which opens the monitor through a command sent to the main microprocessor DD5 through a serial command. 2.4 VCO / Synthesizer (PLL) This section basically consists of the Temperature-Compensated Crystal Oscillator (TCXO), Voltage Controlled Oscillators (VCOs), Synthesizer and the Loop Filter. 2.4.a Temperature-Compensated Crystal Oscillator (TCXO) The reference oscillator is composed by the temperature compensated Oscillator G1 and related circuitry (DA1:A ), RP2 is used to adjust the oscillator on frequency (14.4 MHz) at room temperature. The reference oscillator is held within the specifications ±5 ppm from -30 to +60°C. 2.4.b Voltage-Controlled Oscillators The receive VCO consists of VT511, CV1, VD1006, 1006a, 1009 and VD1009a. This VCO oscillates at 45.1 MHz above the programmed1 receive frequency. The VCO’s oscillating frequency is tuned by the varactors VD1006 thru VD1009a. The transmitter VCO consists of VT512, CV2, VD1111-VD1112 and VD1113-VD1114 and oscillates directly to the TX carrier frequency range. The TX VCO is directly frequency-modulated by means of the varactor VD15 which is driven by the modulating signal (line A) regulated by the trimmer RP4. This is part of the double-point modulation and works mainly in high AF modulating frequencies), the other part of the double point-modulation is explained in the par. “Transmitter Audio Circuits”. The tuning voltage for the VCOs is supplied from the output of the Loop Filter made with R118, R281 R337, C112, C113 and C114. Only one of the VCOs runs at a time. In RX the line RXC (which is obtained from the +8V_RX line coming from the vol…

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: FINAL P A R T S L I S T : FINAL =================== : FINAL: UNDEFINED: 7760 HM-435 UHF MOBILE LMR list made from HM135 and uhf schematic ( ------------ -------------------- ------------------------------- -------- --- -- ---- ------------------------------------- PART-NO. NAME & DESCRIPTION Q'TY UT G KON REFERENCE-NO ------------ -------------------- ------------------------------- -------- --- -- ---- ------------------------------------- 577-60C-A COVER ASS'Y 1EA A Nr 33 in DWG (+)MACHINE SCREW(BH) (Main PCB fix ) M3x6 ZN-PLAT (+) MA 13 EA B SUB Nr 34 in DWG (+)MACHINE SCREW(BH) (Power amp & 7808) M3X8 (+)BH NI 3 EA B SUB Nr 39 in DWG (+)MACHINE SCREW(BH) (Audio Amp) M3X6 (+)BH NI 1 Nr 36 in DWG WASHER SPRING (Power amp & 7808) Washer Spring 3.0mm Zn 3 Nr 14 in DWG (+)MACHINE SCREW(BH) (ESC + Main) M3X8 (+)PH BLK 4 EA B SUB Nr 37 in DWG (+)MACHINE SCREW(BH) (UHF Connector) M3X12 ZN-PLAT 2 EA B SUB Nr 36 in DWG (+)MACHINE SCREW(PH) ( UHF Connector) M3X5 (+)PH BLK 2 EA B SUB Nr 32 in DWG (+)MACHINE SCREW(BH) 4X10 BLK (+)PH MA 4 EA B SUB 651-024 NUT SS41 M3-1S ZN-PLAT 2 EA B SUB 702-491 BODY MAIN ALDC12 1 EA B SUB 71A-256 COVER MAIN ALDC12 1 EA B SUB 772-651 SHIELD UHF TIN 0.3 1 EA B SUB 772-652 SHIELD VCO TIN 0.3 1 EA B SUB 772-670-A SHIELD CAN STPE T0.15 1 EA B SUB 896-252 GASKET BODY CONDUCTIVE RUBBER 1 EA B SUB 896-253 GASKET CABLE CONDUCTIVE RUBBER 1 EA B SUB 896-254 GASKET DB25 CONDUCTIVE RUBBER 1 EA B SUB 896-256 GASKET UHF CONDUCTIVE RUBBER 1 EA B SUB 896-325 GASKET DB9 SILICONE RUBBER BLK 1 EA B SUB 896-044 SPONGE ( display module) 577-60E-A ESCUTCHEON ASS'Y 1EA A Nr 11 and 25 in DW G PT (+)TAPPING SCREW(PH) (PCB and Speaker) 2.5 X6 6 EA B SUB Nr 15 in DWG PT (+)TAPPING SCREW(PH) 2.5 X10 7 EA B SUB 71A-257 HOUSING FRONT ALDC12 1 EA B SUB 796-017 OVERLAY PC TEXTURE T0.5 1 EA B SUB 796-018 PLATE ALAN PC TEXTURE T0.5 1 EA B SUB 801-817 E.S.C PC 1 EA B SUB 814-519 WINDOW ACRYL 1 EA B SUB 819-001 ILLUMINATOR ACRYL 1 EA B SUB 826-612 KNOB SILICONE RUBBER BLK 1 EA B SUB 896-216 KEY PAD SILICONE RUBBER 1 EA B SUB 896-255 GASKET FRONT CONDUCTIVE RUBBER 1 EA B SUB 896-326 GASKET SPEAKER SILICONE RUBBER BLK 1 EA B SUB 577-60H-MA HEAD MANUAL ASS'Y 1EA A 251-327-8 LED DUAL LAMP SPR-39MVW 1 EA B SUB DA800 252-310-7 LCD MODULE PS12032LRS-DAN-K01 1 EA B SUB 270-359-8Z CERAMIC RESONATOR ZTT-8.00MT(8MHZ) 1 EA B SUB X800 420-132-6 SPEAKER FB-064-A3123 4 OHM NOM 4.0W 1 EA B SUB 420-863-3 JACK MODULAR 8949-F66/15 1 EA B SUB XT901 CONN. DB9 STRIGHT ZDEE9S-OL2-146 1 EA B SUB XT802 436-057-5 SW TACT SKQYAB 7 EA B SUB SB1.2.3.4.5.6.7 577-60H-PB HAED POT. METER B'D 1EA A 05B-103-5Z CHIP RESISTOR 10K 1/16W 5% T 1608 2 EA B SMD R901.902 132-260-8Y CHIP CERAMIC 220PF GRM39 COG221J 50V PT 7 EA B SMD C901.902.903.904.905.906.907 421-405-4 CONNECTOR FPC 8X1MM SMD TOP CONTACT(487951) 1 EA B SUB XT902 450-459-2 VR 10KA:PK093VS-1 15SK A10K 1 EA B SUB RP901 577-60H-SA HEAD SMD ASS'Y 1EA A 05B-101-3Z CHIP RESISTOR 100 1/16W 5% T 1608 4 EA B SMD R814.827.832.836 05B-102-4Z CHIP RESISTOR 1K 1/16W 5% T 1608 4 EA B SMD R822.829.830.861 05B-103-5Z CHIP RESISTOR 10K 1/16W 5% T 1608 27 EA B SMD R801.802.805.806.807.810.813. 816.817.821.824.828.831.833. +840.842.844.850.851.852.853.855.856.857.858.860.854 05B-153-0Z CHIP RESISTOR 15K 1/16W 5% T 1608 9 EA B SMD R834.835.837.838.839.841.843. 845.848 05B-154-1Z CHIP RESISTOR 150K 1/16W 5% T 1608 1 EA B SMD R808 05B-222-9Z CHIP RESISTOR 2.2K 1/16W 5% T 1608 3 EA B SMD R819.820.862 05B-223-0Z CHIP RESISTOR 22K 1/16W 5% T 1608 4 EA B SMD R823.825.864.866 05B-272-4Z CHIP RESISTOR 2.7K 1/16W 5% T 1608 2 EA B SMD R811.812 05B-472-8Z CHIP RESISTOR 4.7K 1/16W 5% T 1608 1 EA B SMD R815 05B-473-9Z CHIP RESISTOR 47K 1/16W 5% T 1608 3 EA B SMD R847.859.863 06J-101-6 CHIP RESISTOR 100 1/ 4W 5% T 3216 4 EA B SMD R800.803.846.849 060-202-4Z CHIP RESISTOR 2K 1/10W 5% T 2012 1 EA B SMD R826 060-221-1Z CHIP RESISTOR 220 1/10W 5% T 2012 2 EA B SMD R804.809 130-A75-8Y CHIP CERAMIC 0.001UF GRM39 X7R102K 50V PT 5 EA B SMD C802.803.804.806.808.825 130-B09-9Y CHIP CERAMIC 0.1UF GRM39 X7R104K 16V AT 8 EA B SMD C811.812.813.816.817.820.822. 824 130-290-5Y CHIP CERAMIC 0.22UF GRM40 X7R224K 16V 1 EA B SMD C801 131-089-7Y CHIP CERAMIC 1UF GRM40 Y5V105Z 16V PT 3 EA B SMD C805.821.823 131-093-9Y CHIP CERAMIC 100PF GRM39 COG101J 50V PT 3 EA B SMD C800.807.818 141-021-8 CHIP TANTALUM 10UF ECST1CX106R 16V 2 EA B SMD C814.819 141-512-4 CHIP TANTALUM 15UF ECST1CX156R 16V 1 EA B SMD C810 143-314-4 CHIP TANTALUM 33UF ECST0JX336R 6.3V 1 EA B SMD C815 143-317-6 CHIP TANTALUM 3.3UF ECST1CY335R 16V 1 EA B SMD C809 200-238-1 TRANSISTOR DTC114EETL 6 EA B SMD Q(VT805.807.808.809.810.811) 200-241-3 TRANSISTOR DTC144EETL 1 EA B SMD Q(VT806) 200-249-1 TRANSISTOR UMW1N (UMT5) 1 EA B SMD Q(VT803) 200-255-6 TRANSISTOR 2SA1586GR 1 EA B SMD Q(VT813) 200-256-7 TRANSISTOR 2SC4116GR 4 EA B SMD Q(VT802.812.814.815) 200-315-7 TR RF AMP MMBF5484(SOT-23) 1 EA B SMD Q(VT804) 200-325-6 TRANSISTOR PNP BCW30 3 EA B SMD Q(VT800.801.816) 220-378-0 I.C REGULATOR KIA78L05F 1 EA B SMD IC(DA802) 221-542-6 I.C DUAL OP AMP NJM2904V-TE1/2(SSOP8) 2 EA B SMD IC(DA801.804) 221-802-1 I.C LDO REGULATOR TPS77133 1 EA B SMD IC(DA803) I.C Double inverter NC7WZ14P6X 1 EA B SMD IC(DD802 221-871-3 I.C MICRO CONTROLLER MSP430F147IPM 1 EA B SMD IC(DD800) 241-269-6 DIODE ZENER BZX84-C10 1 EA B SMD D(VD807) 243-089-0 DIODE SWITCHING CHIP 1SS355 TE-17 4 EA B SMD D(VD806.808.809.810) 251-300-3 LED CHIP SML-010MT T86N GRN 6 EA B SUB D(VD800.801.802.803.804.805) 321-212-9 CORE FERRITE BEADS BLM31PG121SN1 1 EA B SMD L800 421-405-4 CONNECTOR FPC 8X1MM SMD TOP CONTACT(487951) 1 EA B SMD XT801 421-726-8 CONN. SMD FEMALE 2MM(2X3) MMS-103-02-L-DV-TR 1 EA B SMD XP801 423-864-9 CABLE FLATE E129545 AWM2896 BOC VW1 1 EA B SUB 480-070-1 POT. CHIP TRIMMER MVR34 HXBR N472 1 EA B SMD RV(RP800) 577-60M-A MIC ASS'Y 1EA A 577-60M-BMA MAIN B'D MAN. ASSY A 1EA A 002-301-2Z FILM RESISTOR 300 1/ 8W 5% ST 1 EA B SUB R(RFB1) 130-350-6Y CHIP CERAMIC 0.039UF GRM39 Y5V393Z 50V PT 1 EA B SU…

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HM135_50_HEAD_nov_2004.SCH

1 2 3 A 5 6 7 B 10 8 9 C 12 13 14 D 5 6 7 B 1 2 3 4 8 A 12 13 14 D 5 6 7 B 5 6 7 B 1 2 3 A 10 8 9 C 12 13 14 D 10 8 9 C 5 6 7 B 1 2 3 4 8 A 5 6 7 B 5 6 7 B 1 2 3 4 8 A 1 2 3 4 8 A 1 2 3 4 8 A 1 2 3 A 12 13 14 D 5 6 7 B 10 8 9 C 1 2 3 A 1 2 3 A 5 6 7 B 10 8 9 C 12 13 14 D

TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc COVER PAGE Test Report Product Name: UHF MOBILE TRANSCEIVER FCC ID: MMA705445N Applicant: MIDLAND RADIO CORPORATION 1120 CLAY STREET NORTH KANSAS CITY, MO. 64116 Date Receipt: DECEMBER 1, 2004 Date Tested: DECEMBER 23, 2004 TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc TABLE OF CONTENTS APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N TABLE OF CONTENTS LIST TEST REPORT: PAGE 1...........GENERAL INFORMATION & TECHNICAL DESCRIPTION PAGE 2...........TECHNICAL DESCRIPTION CONTINUED RF POWER OUTPUT PAGE 3...........MODULATION CHARACTERISTICS AUDIO FREQUENCY RESPONSE PAGE 4...........AUDIO LOW PASS FILTER PAGE 5...........MODULATION LIMITING PAGE 6-7.........OCCUPIED BANDWIDTH PAGE 8...........OCCUPIED BANDWIDTH PLOTS PAGE 9...........SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 10..........METHOD OF MEASURING SPURIOUS EMISSIONS AT ANTENNA TERMINALS PAGE 11-13.......FIELD STRENGTH OF SPURIOUS EMISSIONS PAGE 14..........METHOD OF MEASURING RADIATED SPURIOUS EMISSIONS PAGE 15..........FREQUENCY STABILITY PAGE 16-17.......TRANSIENT FREQUENCY STABILITY PAGE 18-19.......TRANSIENT FREQUENCY RESPONSE PLOTS PAGE 20-25.......EQUIPMENT LIST EXHIBITS CONTAINING: BLOCK DIAGRAM SCHEMATIC PARTS LIST USERS MANUAL LABEL SAMPLE LABEL LOCATION EXTERNAL PHOTOGRAPHS INTERNAL PHOTOGRAPHS TUNING PROCEDURE OPERATIONAL DESCRIPTION TEST SET UP PHOTOGRAPH TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc Page 1 of 25 GENERAL INFORMATION REQUIRED FOR CERTIFICATION OF A LICENSED TRANSMITTER 2.1033(c)(1)(2) MIDLAND RADIO CORPORATION will manufacture the FCCID: MMA705445N UHF TRANSCEIVER in quantity, for use under FCC RULES PART 90. MIDLAND RADIO CORPORATION 1120 CLAY STREET NORTH KANSAS CITY, MO. 64116 2.1033(c) TECHNICAL DESCRIPTION 2.1033(c)(3) Instruction book. A draft copy of the instruction manual is included. 2.1033(c)(4) Type of Emission: 10K8F3E 90.209 90.207 Bn = 2M + 2DK M = 3000 D = 2400 Bn = 2(3000) + 2(2400) = 10.8k 2.1033(c)(5) Frequency Range: 405 – 470 MHz 90.209 (b)(5) 2.1033(c)(6)(7) Power Output shall not exceed 59 Watts into a 50 ohm 90.205 resistive load. There are no user power controls. 2.1033(c)(8) DC Voltages and Current into Final Amplifier: POWER INPUT: FINAL AMPLIFIER ONLY High Low Vce = 13.8 VDC Vce = 13.8 VDC Ice = 4.9 A Ice = 2.0 A Pin = 67.62 Watts Pin = 27.60 Watts 2.1033(c)(9) Tune-up procedure. The tune-up procedure is included. 2.1033(c)(10) Complete Circuit Diagrams: The circuit diagram is included. The block diagram is included. 2.1033(c)(11) Description of all circuitry and devices provided for determining and stabilizing frequency is included in the circuit description. TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc Page 2 of 25 2.1033(c)(12) A photograph or drawing of the equipment identification label is included. 2.1033(c)(13) Photographs of the equipment of sufficient clarity to reveal equipment construction and layout and label location are included. 2.1033(c)(14) Digital Modulation is not allowed 2.1033(c)(15) The data required for 2.1046 through 2.1057 is submitted below. 2.1046(a) RF POWER OUTPUT 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: OUTPUT POWER: HIGH – 45 Watts LOW - 5 Watts Transmitter under Test Power Meter TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc Page 3 of 25 2.1047(a)(b) Modulation characteristics : AUDIO FREQUENCY RESPONSE The audio frequency response was measured in accordance with TIA/EIA Specification 603. A curve or equivalent data showing the frequency response of the audio modulating circuit over a range of 100 – 5000Hz shall be submitted. The audio frequency response curve is shown below. Audio Frequency Response -10 +10 -5 +0 +5 d B 100 4k 200 300 400 500 700 1k 2k 3k Hz TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc Page 4 of 25 2.1047(a) Voice modulated communication equipment For equipment required to have an audio low-pass filter, a curve showing the frequency response of the filter, or of all the circuitry installed between the modulation limiter and the modulated stage shall be submitted. Audio Low Pass Filter -10 +10 -5 +0 +5 d B 2k 20k 3k 4k 5k 6k 7k 8k 10k Hz TIMCO ENGINEERING INC. 849 NW State Road 45 Newberry, Florida 32669 http://www.timcoengr.com 888.472.2424 F 352.472.2030 email: [email protected] APPLICANT: MIDLAND RADIO CORPORATION FCC ID: MMA705445N REPORT #: M\MidlandRadio_MMA\2014AUT4\2014AUT4TestReport.doc Page 5 of 25 2.1047(b) Audio input versus modulation The audio input level needed for a particular percentage of modulation was measured in accordance with TIA/EIA…

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