MMA75445UHF Portable Transceiver

P20 Owner’s Guide (75-445) 2 TABLE OF CONTENTS FCC Licensing Information....................................................................................... 2 TIPS FOR GETTING THE MOST FROM YOUR P20................................................ 3 A NOTE ABOUT THE CTCSS or DCS CODES..................................................... 4 PREPARATION........................................................................................................... 5 BATTERIES............................................................................................................. 5 CHARGING THE BATTERIES............................................................................... 5 BELT CLIP............................................................................................................... 6 QUICK USE INSTRUCTIONS: ................................................................................... 6 POWER SAVE CIRCUIT............................................................................................. 6 RANGE OF UHF RADIOS.......................................................................................... 6 FEATURES AND LOCATION OF CONTOLS........................................................... 7 TURNING THE RADIO ON OR OFF ..................................................................... 7 LOCKING THE CONTROLS .................................................................................. 7 UNLOCKING THE CONTROLS ............................................................................. 7 SELECTING THE CHANNEL................................................................................. 8 PROGRAMMING THE ACTIVE CHANNEL......................................................... 8 ADJUSTING THE VOLUME................................................................................... 8 ADJUSTING THE SQUELCH ................................................................................. 8 USING THE CALL FUNCTION .............................................................................. 8 USING THE MONITOR FUNCTION ...................................................................... 8 TURNING ON OR OFF THE BUTTON PRESS BEEP........................................... 9 TURNING ON THE DISPLAY BACKLIGHT......................................................... 9 TURNING THE ROGER BEEP ON OR OFF.......................................................... 9 ACTIVATING SCAN FUNCTIONS ........................................................................ 9 ACTIVATING “PRIVACY” CODES..................................................................... 10 DCS CODES .......................................................................................................... 12 RESETTING THE RADIO..................................................................................... 12 OPERATING THE HANDS FREE VOX (VOICE OPERATED TRANSMIT)..... 13 SETTING REMOTE MONITOR MODE............................................................... 14 SETTING MEMORY CHANNELS....................................................................... 15 ACCESSING MEMORY CHANNELS.................................................................. 15 DISPLAY SYMBOLS ............................................................................................ 16 TROUBLESHOOTING.............................................................................................. 17 CARE OF RECHARGEABLE NI-CAD BATTERIES............................................... 18 SERVICE: .................................................................................................................. 19 TECHNICAL SPECIFICATIONS* ............................................................................ 20 LIMITED WARRANTY............................................................................................. 21 FCC Licensing Information 3 This Midland model P20 radio operates on FM communication frequencies subject to the Rules and Regulations of the Federal Communications Commission. The FCC requires that all operators using Private Land Mobile frequencies obtain a radio license before operating their equipment. Application for your FCC license is made on FCC form 600 and schedules D, E, and G. To have the forms faxed to you, call the FCC Fax-on-Demand system at 1-202-418- 0177 from your Fax machine and request document 000600 for all forms and instructions. To have this form mailed to you, call the FCC forms hotline at: 1-800-418-3676 For questions concerning license application, contact the FCC at 1-888-CALL-FCC (1-888-225-5322), or go to http://www.fcc.gov. OPTIONAL ACCESSORIES FOR YOUR RADIO Accessory Name Model Number Ni-cad Battery (single “AA” 3 required)..................................18-BATT Ni-MH Battery (single “AA” 3 required).................................18-NBAT Standard Charger............................................................18-396 Charger Stand ...............................................................18-383 Dual Charger Stand ........................................................18-385 Lapel Microphone with Ear-bud Speaker...............................22-405 Speaker/Microphone........................................................22-411 Boom Microphone Headset ..............................................22-540 Call 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 P20 UHF FM business two-way radio is designed to provide you w ith line-of-sight communications for a range up to 4 miles. The model P20 incorporates channels with 38 different CTCSS and 83 DCS codes to provide the best in quiet communications. Also this radio offers scan, power save, 9 memory channels and a multifunction back-lighted liquid crystal display. This unit also incorporates VOX (voice operated transmit) that allows hands free use wh…

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Alignment Instructions WARNING Any repairs or adjustments should 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 of Communications Service Monitor to the antenna connector through a 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 1.00 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 a FM deviation meter or Communications Service Monitor to the antenna connector through a 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 RV201 for +/- 2.4 kHz maximum deviation (with ctcss tone). F. To be convinced +/- 1.8 kHz without ctcss tone (1.2 kHz dev. 20 dB up) G. Release the ptt switch.

ENGINEERING STATEMENT For Type Certification of MIDLAND CONSUMER RADIO Model No: 75-445 FCC ID: MMA75445 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 75-445 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: October 19, 2000 A. INTRODUCTION The following data are submitted in connection with this request for Type Certification of the 75-445 transceiver in accordance with Part 2, Subpart J of the FCC Rules. The 75-445 is a 12.5 kHz bandwidth, UHF, frequency modulated transceiver intended for hand-held, portable applications in the 464 - 469 MHz (itinerant) band. It operates from a 4.5-volt battery pack. Output power rating is 1 watt. B. GENERAL INFORMATION REQUIRED FOR TYPE ACCEPTANCE (Paragraph 2.983 of the Rules) 1. Name of applicant: Midland Consumer Radio 2. Identification of equipment: MMA75445 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: 464-469 MHz. (See channel list Appendix 5.) c. Operating power of transmitter is fixed at the factory at 1 watt. d. Maximum power permitted under Part 90 of the FCC is 350 watts, and the 75-445 fully complied with those power limitations. e. The dc voltage and dc currents at final amplifier: Collector voltage: 4.4 Vdc Collector current: 0.5 A f. Function of each active semiconductor device: See Appendix 1. g. Complete circuit diagram is submitted as a separate exhibit. h. A draft instruction book is submitted as a separate exhibit. i. The transmitter tune-up procedure is submitted as a separate exhibit. 2 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. B. GENERAL INFORMATION...(Continued) 5. Data for 2.985 through 2.997 follow this section. C. RF POWER OUTPUT (Paragraph 2.985(a) of the Rules) RF power output was measured with a Bird 4421 RF power meter and a Narda 765-20 attenuator as a 50 ohm dummy load. Maximum conducted power measured was 0.86 watts. (The transmitter was tuned by the factory.) ERP(d) was 0.98 watts. (See Table 2.) 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 a Audio Precision System One TRMS voltmeter and tracking generator. 2. Modulation limiting curves are shown in Figure 2 for narrow channel operation using a Boonton 8220 modulation meter. Signal level was established with a Audio Precision System One TRMS voltmeter. The curves show compliance with paragraphs 2.987(b), and 90.211(c). 3. Figure 3 is a graph of the post-limiter low pass filter which meets the requirements of paragraph 90.211(d)(1) in providing 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 selective voltmeter on the Boonton 8220 modulation meter audio output. 3 4. Occupied_Bandwidth (Paragraphs 2.989(c), 90.209(b)(4) and 90.210(d) of the Rules) Figure 4 is a plot of the sideband envelope of the transmitter taken with a Advantest R3361A 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 2890 Hz, the frequency of maximum response. For the 12.5 kHz channelization, RBW was 100 Hz, VBW 100 Hz, max hold, multiple scan per 90.210(d)(4). All plots have unmodulated carrier as 0 dBm reference. Emission designators: (2D + 2F) 12.5 kHz 2x2.5 + 2x3 = 11k0F3E D = rated system deviation, kHz. F = maximum audio frequency, kHz. 4 FIGURE 1 MODULATION FREQUENCY RESPONSE MODULATION FREQUENCY RESPONSE FCC ID: MMA75445 FIGURE 1 5 FIGURE 2 AUDIO LIMITER CHARACTERISTICS AUDIO LIMITER CHARACTERISTICS FCC ID: MMA75445 FIGURE 2 6 FIGURE 3 AUDIO LOW PASS FILTER RESPONSE AUDIO LOW PASS FILTER RESPONSE FCC ID: MMA75445 FIGURE 3 7 FIGURE 4 OCCUPIED BANDWIDTH ATTENUATION IN dB BELOW MEAN OUTPUT POWER Required On any frequency from the center of the authorized bandwidth f o 0 (>5.625 kHz) to 5.625 kHz removed from f o . On any frequency removed from the center of the authorized bandwidth 70 (@ 12.5 kHz) by a displacement frequency (f d in kHz) of more than 5.625 kHz but no more than 12.5 kHz: at least 7.27 (f d - 2.88 kHz) dB. On any frequency removed from the 50+10LogP = 50 (>12.5 kHz) center of the authorized bandwidth (P = 0.98W) by a displacement frequency (f d in kHz) of more than 12.5 kHz. OCCUPIED BANDWIDTH FCC ID: MMA75445 FIGURE 4 (2.5 kHz) 8 D. MODULATION CHARACTERISTICS (Continued) The plot is within the limits imposed by Paragraph 90.211(c) for frequency modulation. The horizontal scale (frequency) is 10 kHz per division and the vertical scale (amplitude) is a logarithmic presentation equal to 10 dB per division. Resolution bandwidth was 100 Hz; video bandwidth 1 kHz; max store display; 20 second scan time. E. SPURIOUS EMISSIONS AT THE ANTENNA TERMINALS (Paragraph 2.991 of the Rules) The 75-445 transmitter was tested for spurious emissions at the antenna terminals while the equipment was modulated with a 2500…

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