MMA75511UHF Portable Transceiver

Owner’s Guide Model 75-511 14 channel FRS with 38 CTCSS codes 2 OPTIONAL ACCESSORIES FOR YOUR RADIO........................................ 2 TIPS FOR GETTING THE MOST FROM YOUR 75-511 ............................. 4 A NOTE ABOUT THE CTCSS CODES................................................................. 4 PREPARATION........................................................................................ 4 BATTERIES............................................................................................................. 4 To Install Batteries: .............................................................................................. 4 Low Battery Indicator:.......................................................................................... 5 Instructions for optional charger ........................................................................... 5 BELT CLIP............................................................................................................... 6 QUICK USE INSTRUCTIONS: ................................................................... 6 Operating the Radio ................................................................................. 6 TO OPERATE HANDS FREE VOX........................................................................ 6 Setting VOX Functions. ............................................................................................ 7 TO ENABLE / DISABLE VOX MODE ................................................................... 7 DISPLAY SYMBOLS .............................................................................................. 7 TO TURN THE RADIO ON OR OFF ...................................................................... 8 TO CHANGE THE CHANNEL IN USE.................................................................. 8 ACTIVATING SCAN FUNCTIONS ........................................................................ 8 Busy Channel Scan: .............................................................................................. 8 Activating Dual Watch.......................................................................................... 8 TO USE CALL BUTTON......................................................................................... 9 TO ENABLE/DISABLE “ROGER-BEEP” .............................................................. 9 TO ENABLE / DISABLE KEY BOARD LOCK...................................................... 9 POWER SAVE CIRCUIT......................................................................................... 9 USING THE MONITOR FUNCTION ...................................................................... 9 ACTIVATING “PRIVACY” CODES..................................................................... 10 To activate “CTCSS” codes ............................................................................... 10 TROUBLESHOOTING ............................................................................ 11 Cannot Receive Messages ...................................................................................... 11 Range is Short......................................................................................................... 11 Interference/Static................................................................................................... 11 CARE OF RECHARGEABLE NI-CAD AND NI-MH BATTERIES................. 11 SERVICE:.............................................................................................. 12 CHANNEL FREQUENCIES...................................................................... 13 LIMITED WARRANTY ............................................................................ 14 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 3 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 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 75-511 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 75-511 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 75-511 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 75-511 Due to the band of operation (462/467 MHz) the 75-511 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. Th…

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Owner’s Guide Model 75-511 14 channel FRS with 38 CTCSS codes 2 OPTIONAL ACCESSORIES FOR YOUR RADIO........................................ 2 TIPS FOR GETTING THE MOST FROM YOUR 75-511 ............................. 4 A NOTE ABOUT THE CTCSS CODES................................................................. 4 PREPARATION........................................................................................ 4 BATTERIES............................................................................................................. 4 To Install Batteries: .............................................................................................. 4 Low Battery Indicator:.......................................................................................... 5 Instructions for optional charger ........................................................................... 5 BELT CLIP............................................................................................................... 5 QUICK USE INSTRUCTIONS: ................................................................... 5 Operating the Radio ................................................................................. 5 TO OPERATE HANDS FREE VOX........................................................................ 5 Setting VOX Functions. ............................................................................................ 6 TO ENABLE / DISABLE VOX MODE ................................................................... 6 DISPLAY SYMBOLS .............................................................................................. 6 TO TURN THE RADIO ON OR OFF ...................................................................... 7 TO CHANGE THE CHANNEL IN USE.................................................................. 7 ACTIVATING SCAN FUNCTIONS ........................................................................ 7 Busy Channel Scan: .............................................................................................. 7 Activating Dual Watch.......................................................................................... 7 TO USE CALL BUTTON......................................................................................... 8 TO ENABLE/DISABLE “ROGER-BEEP” .............................................................. 8 TO ENABLE / DISABLE KEY BOARD LOCK...................................................... 8 POWER SAVE CIRCUIT......................................................................................... 8 USING THE MONITOR FUNCTION ...................................................................... 8 ACTIVATING “PRIVACY” CODES....................................................................... 9 To activate “CTCSS” codes ................................................................................. 9 TROUBLESHOOTING ............................................................................ 10 Cannot Receive Messages ...................................................................................... 10 Range is Short......................................................................................................... 10 Interference/Static................................................................................................... 10 CARE OF RECHARGEABLE NI-CAD AND NI-MH BATTERIES................. 10 SERVICE:.............................................................................................. 11 CHANNEL FREQUENCIES...................................................................... 12 LIMITED WARRANTY ............................................................................ 13 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 3 Lapel Microphone with Ear-bud Speaker...............................22-405 Speaker/Microphone.......................................................22-411 Stealth Type Noise Canceling Throat Mic with Ear-bud..............22-430 Boom Microphone Headset ..............................................22-540 Call 1 816 241 8500 ext. 200 to order accessories 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 75-511 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 75-511 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 75-511 operates on 14 channels to provide the best in quiet and private communication. Also this radio offers power save, and auto-squelch. WARNING Your wireless hand-held portable transceiver contains a low power transmitter. When the Push- to-Talk (PTT) button is pressed it sends out radio frequency (RF) signals. The device is authorized to operate at a duty factor not to exceed 50%. In August 1996, the Federal Communications Commission (FCC) adopted RF exposure guidelines with safety levels for hand-held wireless devices. To maintain compliance with the FCC's RF exposure guidelines, this transmitter and its antenna must maintain a separation distance of least 2 inches (5 centimeters) from your face. Speak in a normal voice, with the antenna pointed up and away from the face at the required separation distance. The belt clip is for storage purposes only. DO NOT TRANSMIT WHILE USING THE BELT CLIP.…

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Mr. Andy Leimer Re: FCC ID: MMA75511; EA98410 Midland Consumer Radio Correspondence Reference #16116 FCC Inquiry Dated 9/14/00 1. Push-to-talk devices, per Kwok Chan, duty factory inherently does not exceed 50%. 2/3 User instructions have been revised to include warning statement that device should not be operated in body-worn configuration, see Page 3.

Front View Back View Back, w/o Beltclip Left Side View Right Side View Top View Botto m View

Circuit Board, Track Side Circuit Board, Component Side

Alignment instructions WARNING Any repairs or adjustments should be made under the supervision of a qualified radio-telephone 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 (10 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 output power with a maximum error of +/- 0.05 Watt. E. Release the PTT switch. 4. Deviation Adjustment. A. Connect an audio generator to the microphone jack JIG. 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 (10 watt minimum rating, 20 dB minimum attenuation). Set the monitor to read peak deviation. C. Depress the PTT switch. D. Adjust the audio generator level 100 mV rms. E. Adjust RV3 for +/- 2.4 KHz maximum deviation.(with ctcss tone) F. To be convinced +/- 1.8KHz without ctcss tone.(1.2KHz dev. 20dB up) g. Release the ptt switch.

ENGINEERING STATEMENT For Type Certification of Midland Consumer Radio Model No: 75-511 FCC ID: MMA75511 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- 511 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: July 24, 2000 A. INTRODUCTION The following data are submitted in connection with this request for type certification of the 75-511 transceiver in accordance with Part 2, Subpart J of the FCC Rules. The 75-511 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: MMA75511 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 75-511 fully complied with that power limitation. e. The dc voltage and dc currents at final amplifier: Collector voltage: 4.3 Vdc Collector current: 0.50 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 75-511 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 2996 Hz, the frequency of maximum response. Measured modulation under these conditions was 2.4 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: MMA75511 FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: MMA75511 FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: MMA75511 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: MMA75511 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 75-511 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 75-511 were made with a Tektronix 494P spectrum analyzer using Singer DM-105 for …

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