AIERIT14-441UHF Portable Transceiver

RITRON JMX "FOUR SERIES" OWNER'S MANUAL • Four-channel capability • Easier, enhanced programming method • 1, 2 and 3 Watt models • Quick-change battery • Drop-in charge capable • Weather scan feature (VHF only) • Easy-to-hear, high audio output • Built-in Quiet Call® tone feature • Customer-selectable frequency settings NE NE NE NE NE W W W W W !! !! !! !! !! "FOUR SERIES" HANDHELDS"FOUR SERIES" HANDHELDS "FOUR SERIES" HANDHELDS"FOUR SERIES" HANDHELDS "FOUR SERIES" HANDHELDS COMP COMP COMP COMP COMP AA AA A CTCT CTCT CT UL UL UL UL UL TRATRA TRATRA TRA -SMALL-SMALL -SMALL-SMALL -SMALL PR PR PR PR PR OFESSIONAL TWOFESSIONAL TW OFESSIONAL TWOFESSIONAL TW OFESSIONAL TW O-O- O-O- O- WW WW W AA AA A Y RADIOSY RADIOS Y RADIOSY RADIOS Y RADIOS ACCESSORIES ii OPTIONAL ACCESSORIES: TO ORDER, CALL 1-800-USA-1-USA. BPJS-6N ..... ..... Spare/ Replacement JMX Battery BPS-6N-SC ...... Spare/ Replacement SST Battery BPS-6N-MH ..... Replacement High Capacity Battery AFS-150 ........... VHF Molded Flex AntennaAFS-450 ........... UHF Molded Flex AntennaRHD-1X ............ Single Ear Headset RHD-4X ............ Dual Ear Headset RHD-5X ............ Lightweight Over-the-ear Earset /w In-line PTT RHD-6X ............ Lightweight Behind-the-head Earset w/ In-line PTT RSM-3X ........... Remote Speaker Microphone REP-2 ............... Low Profile Earphone CCL-B ............. Cigarette Lighter Charger MHS-A ............. Cordura Holster w/quick release BCJS-4AD ...... 4-Well Drop-in Charger: JMXBCPS-4AD ...... 4-Well Drop-in Charger: SSTBCJS-AD ......... Single-Well Drop-in Charger: JMX (Overnight) BCC-PS ........... Drop-in High-rate Charger/ Conditioner; for SST Models only Call RITRON for complete listings. RHD-1X Single Ear Headset RHD-4X Dual Ear Headset RSM-3X Remote Speaker Mic The NEW "Four Series" models contain updated programming features, and program differently than other JMXportables. These radios provide more channels, allow you to change channel programming contents individually,and also allow you to delete one or more channels, and add it back in, if needed. RHD-5X Over-the-ear Earset RHD-6X Behind-the-ear Earset BCJS-4AD 4-Well Drop-in Charger BCPS-AD Single-Well Drop-in Charger MHS-A Swivel Holster BPJS-6N Spare Battery Have questions? Call 800-USA-1-USA (800-872-1872) or visit our website at www.ritron.com 14500026 rev 10-3-01.p65 10/15/01, 10:50 AM 1 page 3 RITRON, INC. 1-800-USA-1-USA (1-800-872-1872) Have questions? Call 800-USA-1-USA (800-872-1872) or visit our website at www.ritron.com DESCRIPTION PAGE BATTERIES FIG-5: Battery Access and Installation .............................................. 8Optional Charging Accessories ........................................................... 8Batteries ................................................................................................ 9 General ................................................................................................. 9 Charging ............................................................................................... 9 Battery Maintenance and Conditioning ............................................ 9 TROUBLESHOOTING Notes .................................................................................................... 1 0Chart .................................................................................................... 1 0 FCC LICENSE REQUIRED FCC Regulations ................................................................................. 11Service ................................................................................................. 11 How to Obtain an FCC Radio License .............................................. 11 LIMITED WARRANTY ................................................ INSIDE BACK COVER TABLES: 1. Programmable Frequencies and Codes ........................................ 52. Quiet Call Codes and Frequencies ................................................ 5 FIGURES: 1. Belt Clip Installation ........................................................................ 12. Radio Controls and Connectors ...................................................... 23. To Scan Weather Frequencies ....................................................... 34. To Place the Radio in Program/ Readout Mode .......................... 45. Battery Access and Installation ...................................................... 8 DESCRIPTION PAGE ACCESSORIES Optional Accessories ............................................................................ i i INTRODUCTION General ................................................................................................. 1 Inspection .............................................................................................. 1 "Four Series" Model Numbers ............................................................. 1Model Identification ............................................................................. 1New Programming Method ................................................................. 1FIG-1: Belt Clip Installation ............................................................... 1 CONTROL & OPERATION ........................................................................... 2 FIG-2: Radio Controls and Connectors ............................................. 2 OPERATION Weather Scan (VHF Radios Only) ....................................................... 3FIG-3: To Scan Weather Frequencies ............................................... 3 What The Radio Tones Mean ............................................................. 3Interference Eliminator Codes ............................................................ 3 TO DETERMINE FREQUENCIES & CODES IN "FOUR SERIES" JMX Select Each Channel to Beep Out (Read Out) Channel Contents .. 4FIG-4: To Place the Radio in Program/ Readout Mode ................. 4 TABLE 1: FREQUENCY CODES ................................................................ 5 TABLE 2: INTERFERENCE ELIMIN…

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******************************************************************************************************************** Attestation Statements ******************************************************************************************************************** MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 The following is a list of attached exhibits required by the Federal Communications Commission for the application to and grant of FCC Type Acceptance. Manufacturer’s Statement ............................................. 2.1033 JMX-441 Occupied Bandwidth and Power Characteristics ... 2.1046 & 2.1049 (c)(1) Statement of Certifying Engineer .................................... 2.947 List of Test Equipment Used ............................................. 2.947 (d) Description of Measurement Facility ...................................... 2.948 TYPE OF EXHIBIT:MANUFACTURER’S STATEMENT FCC PART:2.1033 (c)(1-2) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 The AIERIT14-441 is a 450 to 470 MHz UHF-FM Handheld Transceiver to be manufactured and marketed in the United States of America by the applicant, RITRON, Inc. of Carmel, Indiana. The AIERIT14-441 will be marketed by RITRON, Inc. as a model JMX-441. The FCC designator for this unit is ......................... FCC ID: AIERIT14-441 RITRON, Inc. will be manufacturing and marketing the AIERIT14-441 handheld transceiver on a continuing basis. STATEMENT:OCCUPIED BANDWIDTH AND OUTPUT POWER FCC PART:2.1046 & 2.1049 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 The JMX-441 is capable of supporting wide band voice modulation (20K0F3E) or narrow band voice modulation on a 12.5 kHz channel (11K25F3E). Power output ranges from 1 to 2 watts. TYPE OF EXHIBIT:STATEMENT OF CERTIFYING ENGINEER FCC PART:2.947 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 I, Dennis Zimmerman have been working in the Engineering Department since October 1997 as a radio frequency Project Engineer. I have designed two way radios for the last 15 years. I received a Bachelor’s degree in Electrical Engineering from the University of Cincinnati in June 1977. I hereby certify that all measurements and date herein were taken by me, that they were obtained using sound and accepted engineering principles, and that they accurately reflect the performance and characteristics of the units tested. Signed: Dennis Zimmerman – Project Engineer TYPE OF EXHIBIT: TEST EQUIPMENT LIST FCC PART:2.947 (d) MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 The measured data in this report was obtained using one or more of the following pieces of equipment. The particular equipment used in any one test is detailed in the procedure for that test. ITEMMANUFACTURER MODEL NO.SERIAL NO. Communications Test SetHewlett-PackardHP8920A3352A03633 Communications Test SetIFRCOM120B500008863 Spectrum AnalyzerHewlett-Packard8559A2010A 06979 Power SupplyBK/Precision 1730263-023610 Digital OscilloscopePhilipsPM-3335DM630034 Dual Display MultimeterProtek506 Dipole AntennaElectro-MetricsBDA-258-101 Log Periodic AntennaElectro-MetricsLP-258-102 Microwave Test AntennaPolaradCA-B11-3 Temperature ChamberAssociated LaboratoriesELH-0.5-LCN/A ThermocoupleOmega 7035-J-2258504 10dB Attenuator50F-010N/A 20dB AttenuatorTenuline8340-2001544 30dB AttenuatorBird8306-NN/A RF DetectorMicrolabs/FXRXA-1040N/A TYPE OF EXHIBIT:DESCRIPTION OF MEASUREMENT FACILITY FCC PART:2.948 MANUFACTURER:RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 MODEL:JMX-441 TYPE OF UNIT:UHF-FM Handheld Transceiver FCC ID:AIERIT14-441 DATE:Oct 17, 2001 The Field Strength measurements filed with this application were made on a site certified by RITRON, Inc. Data pertaining to this site is on file with the FCC and is current. This site is used exclusively by RITRON, Inc. and is utilized only for the RF Field Strength Measurements of equipment designed and manufactured by RITRON, Inc. It is NOT used for measurements by or for any other party on a contract basis or otherwise.

AIERIT14-441 JMX-441 with components pulled out. AIERIT14-441 JMX-441 battery insertion location. AIERIT14-441 JMX-441 components AIERIT14-441 JMX-441 case back showing area for FCC identification label and belt clip installation.

RITRON, INC. 505 West Carmel Drive Carmel, IN 46032 REVISIONSTOLERANCES (EXCEPT AS NOTED) DECIMAL ± FRACTIONAL ± ANGULAR ± DRAWN BY NO. 1 2 3 4 5 DATEBY CHECKED TRACED SCALE DATE MATERIAL DRAWING NUMBER APPROVED MAP JMX-441 FCC/MODEL LABEL 14200109 2 : 1 11/08/01 MADE IN THE U.S.A. BY RITRON, INC. JMX-441 www.jobcom.com DO NOT RETURN TO DEALER FOR SERVICE, RETURN PRODUCT DIRECTLY TO: RITRON, INC. 505 WEST CARMEL DR. CARMEL, IN 46032 OR CALL 1-800-USA-1-USA FCC ID: AIERIT14-441 FREQ: 460-470 MHz Device must be restricted to occupational use to satisfy FCC RF exposure compliance. See owner's manual for specific operating instructions. CAUTION 12345 MADE IN THE U.S.A. BY RITRON, INC. JMX-441 www.jobcom.com DO NOT RETURN TO DEALER FOR SERVICE, RETURN PRODUCT DIRECTLY TO: RITRON, INC. 505 WEST CARMEL DR. CARMEL, IN 46032 OR CALL 1-800-USA-1-USA FCC ID: AIERIT14-441 FREQ: 460-470 MHz Device must be restricted to occupational use to satisfy FCC RF exposure compliance. See owner's manual for specific operating instructions. CAUTION 12345 0.980" ( +0.000 ) -0.020 2.760" ( +0.000 ) -0.020 1.38" 0.062 R 2 PLC 0.062 R 2 PLC 0.050"±.010 BORDER ALL AROUND C L C L X X X Y Y Y AREA FOR SERIAL NUMBER VEL VET SIDE MA TTE SIDE GRAPHICS TO BE SUB-SURFACE, PRINTED ON MATTE SIDE VIEW A - ARTWORK REGISTRATION (scale 1:1) FRONT VIEW (scale 2:1) SIDE VIEW (scale 2:1) TYPE SPECIFICATIONS: 1. "FCC ID: AIERIT14-441" and "FREQ: 460-470 MHz" Black characters, Helvetica Bold, 5 point, align left, align left after colon character. Characters are centered in box as shown. 2. "Device must be restricted to......instructions." Silver characters, Helvetica, 5 point, justify left, centered in left half of label with CAUTION symbol as shown. 3. "MADE IN THE U.S.A. BY RITRON INC." Silver characters, Helvetica Bold, 4 point, align right. 4. "JMX-441" Silver characters, Helvetica Bold, 9 point. 5. "DO NOT RETURN TO DEALER" and the Ritron address and phone number. Silver characters, Helvetica Bold, 5 point centered in box. 6. "FOR SERVICE, RETURN PRODUCT DIRECTLY TO:" Silver characters, Helvetica Bold, 3 point centered in box. 7. "www.jobcom.com" Silver characters, Helvetica Bold, 7 point, align right. 8. "CAUTION" Silver characters, Helvetica Bold, 6 point, align center with Caution symbol. NOTES: 1. MATERIAL - .010 thick clear Lexan film (#8B35) with velvet/matte finish. 2. ADHESIVE - Part to have .002 thick "tamper proof" destructive adhesive (Scotch #467 or Engineering approved equivalent) with an easy to remove liner. 3. GRAPHICS - To be sub-surface printed on the matte side per Ritron art work definition (see type specifications at left), registered to the part edge as shown in View A. Background color to be black. 4. The area designated for the SERIAL NUMBER will be silver, and is 0.55" x 0.12". Serial number characters are black, 8 point size. Serial number to be centered within the silver area. 5. NUMBER SERIALIZATION to use hot stamp process on .0015" silver compucal material with bold black print. 6. CAUTION symbol provided on stat sheet. Symbol is silver with black character.

AIERIT14-441 JMX-441 bottom side AIERIT14-441 JMX-441 Top Side

TABLE OF CONTENTS SECTIONTOPIC PAGE 1.JMX-441 SPECIFICATIONS GENERAL4 RECEIVER5 TRANSMITTER6 2.INTRODUCTION GENERAL7 Inspection7 Model Identification7 FCC REGULATIONS Licensing7 Safety Standards7 3.BATTERY CARE CHARGING8 BATTERY REPLACEMENT9 PRECAUTIONS9 4.DESCRIPTION OF CONTROLS AND CONNECTORS10 Fig. 2 Controls and Connectors11 Belt Clip Installation11 5.OPERATION On-Off/Volume12 Receive12 Monitor12 Selective Signaling Squelch12 Battery Saver12 Transmit13 Channel Selection13 WHAT THE RADIO TONES MEAN Power On/Self Check “OK13 Error Tones13 Channel Select13 Tone Squelch13 Recharge Battery Alert13 OPTIONAL RADIO TONES Receiver Squelch Tone14 Busy Channel Inhibit14 Transmitter Time Out14 TROUBLESHOOTING General14 Battery14 Error Tones14 Tone Coded Squelch15 6.PROGRAMMING THE RADIO PTT (PUSH-TO-TALK) PROGRAMMING Placing the Radio in PTT Programming Mode16 How To Find Out What Is Already Programmed16 PTT Programming the Radio17 PTT Programming Mistakes17 Return To Normal Operation17 Table 1 – PTT Programming Frequency Table18 2 Table 2 – Quiet Call Codes and Frequencies18 COMPUTER SOFTWARE COPYRIGHTS18 PROGRAMMING THE RADIO USING A PC COMPUTER19 Programmable Features19 Description of Features19 7.JMX-441 THEORY OF OPERATION INTRODUCTION20 POWER SUPPLY AND VOLTAGE DISTRIBUTION20 Power Strobe20 Low Battery Voltage Detection20 REFERENCE OSCILLATOR21 SYNTHESIZER 21 Pin Numbers21 Prescaler Divider / Synthesizer Controller21 VCO / Buffer Amplifiers22 Oscillator Modulation22 RECEIVER22 RF Amplifier22 1st Mixer22 FM Receiver Subsystem22 Voice / Tone Conditioning in Receiver Mode23 Voice Band23 Sub-Audible23 Audio Amplifier23 ANTENNA SWITCHING / LOW-PASS FILTER23 TRANSMITTER24 Keying24 +VTX Supply24 Power Amplifier24 Voice/Tone Conditioning in Transmit Mode24 Voice Band24 Sub-Audible24 MICROCONTROLLER25 8.JMX-441 ALIGNMENT PROCEDURE RECOMMENDED TEST EQUIPMENT26 RADIO PREPARATION26 REFERENCE FREQUENCY26 TRANSMITTER POWER26 TRANSMITTER VOICE DEVIATION27 RECEIVER SENSITIVITY AND SQUELCH27 RECEIVER NOISE SQUELCH27 SYNTHESIZER27 9.JMX-441 VOLTAGE CHART Measurement Conditions28 JMX-441 Voltages28 10.JMX-441 SCHEMATIC REFERENCE PARTS LIST34 11.JMX-441 CASE ASSEMBLY PARTS LIST47 12.SCHEMATIC AND PART PLACEMENT DRAWINGS48 IMPORTANT MAINTENANCE/REPAIR INFORMATION 3 Surface Mount Repair RITRON surface mount products require special equipment and servicing techniques. Improper servicing techniques can cause permanent damage to the printed circuit boards and/or components, which is not covered by RITRON’s warranty. If you are not completely familiar with surface mounted component repair techniques, RITRON recommends that you defer maintenance to qualified service personnel. Precautions for Handling CMOS Devices This radio contains complementary metal-oxide semiconductor (CMOS) devices, which require special handling techniques. CMOS circuits are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, with no failure appearing until weeks or months later. For this reason, take special precautions any time you disassemble the radio. Follow the precautions below, which are even more critical in low humidity environments. 1)Storage/transport - CMOS devices that will be stored or transported must be placed in conductive material so that all exposed leads are shorted together. CMOS devices must not be inserted into conventional plastic “snow” or plastic trays of the type that are used for other semiconductors. 2)Grounding - All CMOS devices must be placed on a grounded bench surface. The technician that will work on the radio/CMOS circuit must be grounded before handling the radio. Normally, the technician wears a conductive wrist strap in series with a 100K Ohm resistor to ground. 3)Clothing - Do not wear nylon clothing while handling CMOS circuits. 4)Power off - Remove power before connecting, removing or soldering a PC board that contains CMOS devices. 5)Power/voltage transients - Do not insert or remove CMOS devices with power applied. Check all power supplies to be used for testing CMOS devices, making sure that no voltage transients are present. 6)Soldering - Use a grounded soldering iron for soldering CMOS circuitry. 7)Lead-straightening tools - When straightening CMOS leads, provide ground straps for the tool used. PC Board Removal - Special Tool RITRON recommends using a knurled nut tool to remove the slotted knurled nuts that secure the charge and audio jacks on top of the radio. You will need two sizes of this tool, one for each jack size. Mouser Corporation  is one source, stock number 382-0004 (2.5mm jack) and 382-0006 (3.5mm jack). You can reach Mouser sales and distribution center at 1-800-346-6873. Properly Attach the Synthesizer Shield The synthesizer shield should not be removed, unless a component must be replaced. This shield is soldered to the main PC board. Re-assembly - Speaker Magnet, Battery Voltage on Connector Pin The speaker magnet will pick up clipped leads and other small metal objects from your bench top. Even tiny objects on the diaphragm will cause the speaker to buzz. Make sure the speaker is free of foreign objects before reassembling the radio. Radio Transmitter Power Measurements The JMX-441 was designed to produce a nominal output power of 1.5 watts at 7.5 volts. Measurements are made with the RITRON 441-SRVBD RF service module connected to the radio antenna terminal. JMX-441 SPECIFICATIONS GENERAL 4 FCC ID:AIERIT14-441 FCC Rule Parts:22, 74, 90, 95 Frequency Range:450-470 MHz RF Channels:Conventional: 4 Channels, Independent TX/RX frequencies. Synthesizer Step Size:12.5 KHz Frequency Stability:+/-2.5 PPM (-30 to +60 C) Tone/Code Signaling:CTCSS (Quiet Call) Power Supply:+7.5 VDC, 700 mAH rechargeable NiCd battery pack standard +7.5 VDC, 1500 mAH rechargeable MiMH battery pack optional Battery Drain: Standby:65 mA Sleep:17 mA Avg. Standby with Power Saver:30 mA Receive:150 mA Transmit:600 mA @ 1.5 Watts with 7.5 VDC battery Battery Life:Standard batte…

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TABLE OF CONTENTS SECTIONTOPIC PAGE 1.JMX-441 SPECIFICATIONS GENERAL4 RECEIVER5 TRANSMITTER6 2.INTRODUCTION GENERAL7 Inspection7 Model Identification7 FCC REGULATIONS Licensing7 Safety Standards7 3.BATTERY CARE CHARGING8 BATTERY REPLACEMENT9 PRECAUTIONS9 4.DESCRIPTION OF CONTROLS AND CONNECTORS10 Fig. 2 Controls and Connectors11 Belt Clip Installation11 5.OPERATION On-Off/Volume12 Receive12 Monitor12 Selective Signaling Squelch12 Battery Saver12 Transmit13 Channel Selection13 WHAT THE RADIO TONES MEAN Power On/Self Check “OK13 Error Tones13 Channel Select13 Tone Squelch13 Recharge Battery Alert13 OPTIONAL RADIO TONES Receiver Squelch Tone14 Busy Channel Inhibit14 Transmitter Time Out14 TROUBLESHOOTING General14 Battery14 Error Tones14 Tone Coded Squelch15 6.PROGRAMMING THE RADIO PTT (PUSH-TO-TALK) PROGRAMMING Placing the Radio in PTT Programming Mode16 How To Find Out What Is Already Programmed16 PTT Programming the Radio17 PTT Programming Mistakes17 Return To Normal Operation17 Table 1 – PTT Programming Frequency Table18 Table 2 – Quiet Call Codes and Frequencies18 2 COMPUTER SOFTWARE COPYRIGHTS18 PROGRAMMING THE RADIO USING A PC COMPUTER19 Programmable Features19 Description of Features19 7.JMX-441 THEORY OF OPERATION INTRODUCTION20 POWER SUPPLY AND VOLTAGE DISTRIBUTION20 Power Strobe20 Low Battery Voltage Detection20 REFERENCE OSCILLATOR21 SYNTHESIZER 21 Pin Numbers21 Prescaler Divider / Synthesizer Controller21 VCO / Buffer Amplifiers22 Oscillator Modulation22 RECEIVER22 RF Amplifier22 1st Mixer22 FM Receiver Subsystem22 Voice / Tone Conditioning in Receiver Mode23 Voice Band23 Sub-Audible23 Audio Amplifier23 ANTENNA SWITCHING / LOW-PASS FILTER23 TRANSMITTER24 Keying24 +VTX Supply24 Power Amplifier24 Voice/Tone Conditioning in Transmit Mode24 Voice Band24 Sub-Audible24 MICROCONTROLLER25 8.JMX-441 ALIGNMENT PROCEDURE RECOMMENDED TEST EQUIPMENT26 RADIO PREPARATION26 REFERENCE FREQUENCY26 TRANSMITTER POWER26 TRANSMITTER VOICE DEVIATION27 RECEIVER SENSITIVITY AND SQUELCH27 RECEIVER NOISE SQUELCH27 SYNTHESIZER27 9.JMX-441 VOLTAGE CHART Measurement Conditions28 JMX-441 Voltages28 10.JMX-441 SCHEMATIC REFERENCE PARTS LIST34 11.JMX-441 CASE ASSEMBLY PARTS LIST47 12.SCHEMATIC AND PART PLACEMENT DRAWINGS48 3 IMPORTANT MAINTENANCE/REPAIR INFORMATION Surface Mount Repair RITRON surface mount products require special equipment and servicing techniques. Improper servicing techniques can cause permanent damage to the printed circuit boards and/or components, which is not covered by RITRON’s warranty. If you are not completely familiar with surface mounted component repair techniques, RITRON recommends that you defer maintenance to qualified service personnel. Precautions for Handling CMOS Devices This radio contains complementary metal-oxide semiconductor (CMOS) devices, which require special handling techniques. CMOS circuits are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, with no failure appearing until weeks or months later. For this reason, take special precautions any time you disassemble the radio. Follow the precautions below, which are even more critical in low humidity environments. 1) Storage/transport - CMOS devices that will be stored or transported must be placed in conductive material so that all exposed leads are shorted together. CMOS devices must not be inserted into conventional plastic “snow” or plastic trays of the type that are used for other semiconductors. 2) Grounding - All CMOS devices must be placed on a grounded bench surface. The technician that will work on the radio/CMOS circuit must be grounded before handling the radio. Normally, the technician wears a conductive wrist strap in series with a 100K Ohm resistor to ground. 3) Clothing - Do not wear nylon clothing while handling CMOS circuits. 4) Power off - Remove power before connecting, removing or soldering a PC board that contains CMOS devices. 5) Power/voltage transients - Do not insert or remove CMOS devices with power applied. Check all power supplies to be used for testing CMOS devices, making sure that no voltage transients are present. 6) Soldering - Use a grounded soldering iron for soldering CMOS circuitry. 7) Lead-straightening tools - When straightening CMOS leads, provide ground straps for the tool used. PC Board Removal - Special Tool RITRON recommends using a knurled nut tool to remove the slotted knurled nuts that secure the charge and audio jacks on top of the radio. You will need two sizes of this tool, one for each jack size. Mouser Corporation  is one source, stock number 382-0004 (2.5mm jack) and 382-0006 (3.5mm jack). You can reach Mouser sales and distribution center at 1-800-346-6873. Properly Attach the Synthesizer Shield The synthesizer shield should not be removed, unless a component must be replaced. This shield is soldered to the main PC board. Re-assembly - Speaker Magnet, Battery Voltage on Connector Pin The speaker magnet will pick up clipped leads and other small metal objects from your bench top. Even tiny objects on the diaphragm will cause the speaker to buzz. Make sure the speaker is free of foreign objects before reassembling the radio. Radio Transmitter Power Measurements The JMX-441 was designed to produce an output power of up to 2 watts. Measurements are made with the RITRON 441-SRVBD RF service module connected to the radio antenna terminal. 4 JMX-441 SPECIFICATIONS GENERAL FCC ID:AIERIT14-441 FCC Rule Parts:22, 74, 90, 95 Frequency Range:450-470 MHz RF Channels:Conventional: 4 Channels, Independent TX/RX frequencies. Synthesizer Step Size:12.5 KHz Frequency Stability:+/-2.5 PPM (-30 to +60 C) Tone/Code Signaling:CTCSS (Quiet Call) Power Supply:+7.5 VDC, 700 mAH rechargeable NiCd battery pack standard +7.5 VDC, 1500 mAH rechargeable MiMH battery pack optional Battery Drain: Standby:65 mA Sleep:17 mA Avg. Standby with Power Saver: 30 mA Receive:150 mA Transmit:600 mA @ 1.5 Watts with 7.5 VDC battery Transmit:800 mA @ 2.0 Watts with 8.…

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TABLE OF CONTENTS SECTIONTOPIC PAGE 1.JMX-441 SPECIFICATIONS GENERAL4 RECEIVER5 TRANSMITTER6 2.INTRODUCTION GENERAL7 Inspection7 Model Identification7 FCC REGULATIONS Licensing7 Safety Standards7 3.BATTERY CARE CHARGING8 BATTERY REPLACEMENT9 PRECAUTIONS9 4.DESCRIPTION OF CONTROLS AND CONNECTORS10 Fig. 2 Controls and Connectors11 Belt Clip Installation11 5.OPERATION On-Off/Volume12 Receive12 Monitor12 Selective Signaling Squelch12 Battery Saver12 Transmit13 Channel Selection13 WHAT THE RADIO TONES MEAN Power On/Self Check “OK13 Error Tones13 Channel Select13 Tone Squelch13 Recharge Battery Alert13 OPTIONAL RADIO TONES Receiver Squelch Tone14 Busy Channel Inhibit14 Transmitter Time Out14 TROUBLESHOOTING General14 Battery14 Error Tones14 Tone Coded Squelch15 6.PROGRAMMING THE RADIO PTT (PUSH-TO-TALK) PROGRAMMING Placing the Radio in PTT Programming Mode16 How To Find Out What Is Already Programmed16 PTT Programming the Radio17 PTT Programming Mistakes17 Return To Normal Operation17 Table 1 – PTT Programming Frequency Table18 2 Table 2 – Quiet Call Codes and Frequencies18 COMPUTER SOFTWARE COPYRIGHTS18 PROGRAMMING THE RADIO USING A PC COMPUTER19 Programmable Features19 Description of Features19 7.JMX-441 THEORY OF OPERATION INTRODUCTION20 POWER SUPPLY AND VOLTAGE DISTRIBUTION20 Power Strobe20 Low Battery Voltage Detection20 REFERENCE OSCILLATOR21 SYNTHESIZER 21 Pin Numbers21 Prescaler Divider / Synthesizer Controller21 VCO / Buffer Amplifiers22 Oscillator Modulation22 RECEIVER22 RF Amplifier22 1st Mixer22 FM Receiver Subsystem22 Voice / Tone Conditioning in Receiver Mode23 Voice Band23 Sub-Audible23 Audio Amplifier23 ANTENNA SWITCHING / LOW-PASS FILTER23 TRANSMITTER24 Keying24 +VTX Supply24 Power Amplifier24 Voice/Tone Conditioning in Transmit Mode24 Voice Band24 Sub-Audible24 MICROCONTROLLER25 8.JMX-441 ALIGNMENT PROCEDURE RECOMMENDED TEST EQUIPMENT26 RADIO PREPARATION26 REFERENCE FREQUENCY26 TRANSMITTER POWER26 TRANSMITTER VOICE DEVIATION27 RECEIVER SENSITIVITY AND SQUELCH27 RECEIVER NOISE SQUELCH27 SYNTHESIZER27 9.JMX-441 VOLTAGE CHART Measurement Conditions28 JMX-441 Voltages28 10.JMX-441 SCHEMATIC REFERENCE PARTS LIST34 11.JMX-441 CASE ASSEMBLY PARTS LIST47 12.SCHEMATIC AND PART PLACEMENT DRAWINGS48 IMPORTANT MAINTENANCE/REPAIR INFORMATION 3 Surface Mount Repair RITRON surface mount products require special equipment and servicing techniques. Improper servicing techniques can cause permanent damage to the printed circuit boards and/or components, which is not covered by RITRON’s warranty. If you are not completely familiar with surface mounted component repair techniques, RITRON recommends that you defer maintenance to qualified service personnel. Precautions for Handling CMOS Devices This radio contains complementary metal-oxide semiconductor (CMOS) devices, which require special handling techniques. CMOS circuits are susceptible to damage by electrostatic or high voltage charges. Damage can be latent, with no failure appearing until weeks or months later. For this reason, take special precautions any time you disassemble the radio. Follow the precautions below, which are even more critical in low humidity environments. 1)Storage/transport - CMOS devices that will be stored or transported must be placed in conductive material so that all exposed leads are shorted together. CMOS devices must not be inserted into conventional plastic “snow” or plastic trays of the type that are used for other semiconductors. 2)Grounding - All CMOS devices must be placed on a grounded bench surface. The technician that will work on the radio/CMOS circuit must be grounded before handling the radio. Normally, the technician wears a conductive wrist strap in series with a 100K Ohm resistor to ground. 3)Clothing - Do not wear nylon clothing while handling CMOS circuits. 4)Power off - Remove power before connecting, removing or soldering a PC board that contains CMOS devices. 5)Power/voltage transients - Do not insert or remove CMOS devices with power applied. Check all power supplies to be used for testing CMOS devices, making…

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