MMA75509Family Radio

Model 75-509 Owner’s Guide 2 OPTIONAL ACCESSORIES FOR YOUR RADIO........................................ 2 TIPS FOR GETTING THE MOST FROM YOUR 75-509....................................... 4 PREPARATION........................................................................................ 4 BATTERIES............................................................................................................. 4 To Install Batteries: .................................................................................................. 4 Low Battery Indicator:.............................................................................................. 4 Instructions for optional charger ............................................................................... 4 BELT CLIP............................................................................................................... 5 QUICK USE INSTRUCTIONS: ................................................................... 5 TO OPERATE THE HANDS FREE VOX..................................................... 5 POWER SAVE CIRCUIT........................................................................... 6 FEATURES AND LOCATION OF CONTOLS.............................................. 7 TO TURN THE RADIO ON OR OFF ...................................................................... 7 TO CHANGE THE CHANNEL IN USE.................................................................. 7 TO SCAN THE CHANNELS................................................................................... 7 TO SET UP DUAL WATCH .................................................................................... 7 TO USE CALL BUTTON......................................................................................... 7 TO ENABLE/DISABLE “ROGER-BEEP” .............................................................. 7 TO ADJUST THE VOLUME ................................................................................... 7 TO ENABLE / DISABLE KEY BOARD LOCK...................................................... 7 TROUBLESHOOTING .............................................................................. 8 Cannot Receive Messages ........................................................................................ 8 Range is Short........................................................................................................... 8 Interference/Static..................................................................................................... 8 CARE OF RECHARGEABLE NI-CAD AND NI-MH BATTERIES................... 8 SERVICE:................................................................................................ 9 CHANNEL FREQUENCIES...................................................................... 10 LIMITED WARRANTY ............................................................................ 11 OPTIONAL ACCESSORIES FOR YOUR RADIO Accessory Name Model Number Standard Ni-Cad Charger ...............................................18-396 Ni-Cad batteries ...........................................(Three Required)....18-Batt Desk Charger stand.......................................................18-383 Dual Desk Charger stand.................................................18-385 Lapel Microphone with Earbud Speaker...............................22-405* Speaker/Microphone......................................................22-411* Stealth Type Noise Canceling Throat Mic with Earbud..............22-430* Boom Microphone Headset ..............................................22-540* Call 1 816 241 8500 ext. 200 to order accessories 3 THIS RADIO COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE CONDITION THAT THIS DEVICE DOES NOT CAUSE HARMFUL INTERFERENCE. Your Midland model 75-509 brings the new FRS (Family Radio Service) to your fingertips. The Family Radio Service is provided for by the FCC and is totally license free. For the first time business and the general public can use the quiet UHF FM band for personal communications at no charge. The 75-509 uses maximum allowable pow er for range up to 2 miles. Use for fishing, hunting, picnics, biking, business, or any other activity where communications are needed for convenience or safety. The model 75-509 operates on 14 channels to provide the best in quiet and private communication. Also this radio offers power save, and auto-squelch. 4 TIPS FOR GETTING THE MOST FROM YOUR 75-509 Due to the band of operation (462/467 MHz) the 75-509 provides communications that are virtually free of atmospheric interference (skip) that is common on lower frequency bands. Along with this and an antenna system that is very efficient as compared to other unlicensed radio bands, communications range is surprisingly good. Many times the limits to maximum possible range are environmental factors such as blockage caused by trees, buildings, hills, or other obstructions. If you find communication is not possible, many times this can be overcome by moving only a few feet to a new location. Range may be reduced while operating in a vehicle or from inside to outside a metal building. Battery condition also affects range. The 75-509 operates best on alkaline batteries. While this unit has been designed with gaskets for w ater resistance and ruggedness it is a precision piece of electronic equipment that should not be exposed to water or handled carelessly. Normal care should result in years of trouble free operation. Do not leave batteries installed over a long period of time as leakage may occur that can destroy the radio. Always save your receipt, as it is required for warranty consideration. . PREPARATION BATTERIES 75-509 radios operate with 3 AA Alkaline, Ni-Cad (nickel cadmium) or Ni-MH (nickel metal hydride) batteries (optional). Ni-Cad batteries provide about 15 hours of use. Alkaline batteries will provide about 45 hours of use and Ni-MH batteries will provide about 24 hours of use. If the 75-509 is su…

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7. Alignment instructions WARNING ANY repairs or adjustme nts s hould be made under the supervision of a Qualified radiotelephone technician. TRANSMITTER 1. Power Supply Voltage The Power supply voltage should be set for 4.5 VDC measured at the radio During transmit. Periodically check the power supply voltage during the alignment procedure. 2. Frequency Setting A.Connect a frequency counter or Communications Service Monitor to the Antenna connector through an RF power attenuator (5 watt minimum rating, 20 dB minimum attenuation). B. Depress the PTT switch. C. Adjust the CTX1 trimmer capacitor such that The output frequency is equal to the channel frequency with a maximum error of +/- 200 Hz. D. Release the PTT switch. 3. Output Power Alignment. A. Set the power supply voltage for 4.5 VDC. B. Connect a Communications Service Monitor or a wattmeter and dummy load To the antenna connector. C. Depress the PTT switch. D. To be convinced for 0.5 Watt(50 ohm load) output power with a maximum error of +/- 0.15 Watts. E. Release the PTT switch. 4. Deviation Adjustment. A. Connect an audio generator . The audio frequency should be set at 1 KHz. B. Connect an FM deviation meter or Communications Service Monitor to the antenna connector through an RF power attenuator (5 watt minimum rating, 20 dB minimum attenuation). Set the monitor to read peak deviation. C. Depress the PTT switch. D. Adjust RV3 for +/- 2.5KHz maximum deviation. E. Release the PTT switch. RECEIVER NOTE: Insure that the proper channel has been selected before preceding with the alignment procedure. 1. Power Supply Voltage The proper voltage for testing is 4.5VDC. 2. Receiver Alignment A. Connec t a n RF signal ge nerator or Co mmunicatio ns Service Monitor to thea ntenna connector.. B. Connect a SINAD meter and oscilloscope across the speaker terminals. C. Set the output level of the RF signal generator for -47 dBm. the gener- ator should be set for +/- 1.5 KHz deviation of a 1 KHz audio. D. Set the audio output level for 0.6 Vrms. by adjusting volume. E. Confirm Audio distortion. F. Set the output level of the RF signal generator for –116dbm, confirm 12db sinad. G. Adjust the squelch RV1 between –117dbm and –123dbm.

ENGINEERING STATEMENT For Type Certification of Midland Consumer Radio Model No: 75-509 FCC ID: MMA75509 I am an Electronics Engineer, a principal in the firm of Hyak Laboratories, Inc., Springfield, Virginia. My education and experience are a matter of record with the Federal Communications Commission. Hyak Laboratories, Inc. has been authorized by Midland Consumer Radio to make type certification measurements on the 75- 509 transceiver. These tests made by me or under my supervision in our Springfield laboratory. Test data and documentation required by the FCC for Type Certification are included in this report. The data verifies that the above mentioned transceiver meets FCC requirements and Type Certification is requested. ______________________________ Rowland S. Johnson Dated: March 22, 2000 A. INTRODUCTION The following data are submitted in connection with this request for type certification of the 75-509 transceiver in accordance with Part 2, Subpart J of the FCC Rules. The 75-509 is a portable, battery operated, UHF, frequency modulated transceiver intended for 12.5 kHz channel family radio service applications in the 462.5625-467.7125 MHz band. It operates from a nominal 4.5 Vdc battery supply. MFR rated output power is 0.5 watts ERP. B. GENERAL INFORMATION REQUIRED FOR TYPE CERTIFICATION (Paragraph 2.983 of the Rules) 1. Name of applicant: Midland Consumer Radio 2. Identification of equipment: FCC ID: MMA75509 a. The equipment identification label is submitted as a separate exhibit. b. Photographs of the equipment are submitted as a separate exhibit. 3. Quantity production is planned. 4. Technical description: a. 11k0F3E emission b. Frequency range: 462.5625 - 467.7125 MHz. c. Operating power of transmitter is fixed at the factory at less than 0.5 W ERP. d. Maximum power permitted is 0.5 watts, and the 75-509 fully complied with that power limitation. e. The dc voltage and dc currents at final amplifier: Collector voltage: 4.3 Vdc Collector current: 0.52 A f. Function of each active semiconductor device: See Appendix 1. g. Complete schematic diagram is submitted as a separate exhibit. h. A draft instruction manual is submitted as a separate exhibit. i. The transmitter tune-up procedure is submitted as a separate exhibit. 2 B. GENERAL INFORMATION (continued) j. A description of circuits for stabilizing frequency is included in Appendix 2. k. A description of circuits and devices employed for suppression of spurious radiation and for limiting modulation is included in Appendix 3. l. Not applicable. 5. Data for 2.985 through 2.997 follow this section. C. RF_Power_Output (Paragraph 2.985(a) of the Rules) The 75-509 has a permanently attached built-in antenna without provisions for a coaxial connector. Therefore RF power output was calculated, see Table 1. (The transmitter was tuned by the factory. TABLE 1 Operating Freq., MHz Power watts into a dipole antenna 462.5625 0.498 D. MODULATION CHARACTERISTICS 1. A curve showing frequency response of the transmitter is shown in Figure 1. Reference level was audio signal output from a Boonton 8220 modulation meter with one kHz deviation. Audio output was measured with an Audio Precision System One integrated test system. 2. Modulation limiting curves are shown in Figure 2, using a Boonton 8220 modulation meter. Signal level was established with a Audio Precision System One integrated test system. The curves show compliance with paragraphs 2.987(b). 3. Figure 3 is a graph of the post-limiter low pass filter which provides a roll-off of 60Logf/3 dB where f is audio frequency in kHz. Measurements were made following EIA RS-152B with an Audio Precision System One integrated test system on the Boonton 8220 modulation meter audio output. 3 4. Occupied_Bandwidth (Paragraphs 2.989(c) of the Rules) Figure 4 is a plot of the sideband envelope of the transmitter output taken with a Tektronix 494P spectrum analyzer. Modulation corresponded to conditions of 2.989(c)(1) and consisted of 2500 Hz tone at an input level 16 dB greater than that necessary to produce 50% modulation at 2447 Hz, the frequency of maximum response. Measured modulation under these conditions was 2.3 kHz. Emission designator: (2M + 2D) (2 x 3 kHz) + (2 x 2.5 kHz) = 11k0F3E 4 FIGURE 1 MODULATION FREQUENCY RESPONSE MODULATION FREQUENCY RESPONSE FCC ID: MMA75509 FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS NOTE: Deviation at 300 Hz did not exceed 2.5 kHz. AUDIO LIMITER CHARACTERISTICS FCC ID: MMA75509 FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: MMA75509 FIGURE 3 7 FIGURE 4 OCCUPIED BANDWIDTH ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency more than 50% up to and including 100% of the 25 authorized bandwidth, 12.5 kHz (6.25-12.5 kHz) On any frequency more than 100%, up to and including 250% of the 35 authorized bandwidth (12.5-31.25 kHz) On any frequency removed from the assigned frequency by more 43+10LogP = 40 than 250% of the authorized (P = 0.498) bandwidth (over 31.25 kHz) OCCUPIED BANDWIDTH FCC ID: MMA75509 FIGURE 4 8 D. MODULATION CHARACTERISTICS (Continued) The plots are within FCC limits. The horizontal scale frequency) is 10 kHz per division and the vertical scale amplitude) is a logarithmic presentation equal to 10 dB per division. E. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS (Paragraph 2.991 of the Rules) The 75-509 has a permanently attached antenna. There is no connector for an external antenna. Therefore, no antenna terminal conducted measurements were made. F. DESCRIPTION OF RADIATED SPURIOUS MEASUREMENT FACILITIES A description of the Hyak Laboratories’ radiation test facility is a matter of record with the FCC. The facility was accepted for radiation measurements from 25 to 1000 MHz on October 1, 1976 and is currently listed as an accepted site. G. FIELD STRENGTH MEASUREMENTS OF SPURIOUS RADIATION Field intensity measurements of radiated spurious emissions from the 75-509 were made with a Tektro…

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