Ericsson MTL-SX User's Manual
Contents
1. Squelch Tail Elimination Squelch and audio cir cuits are designed so that annoying squelch pops which may occur at the end of received messages are minimized This feature is compatible with ex isting STE systems Alert Tones Alert tones prompt the operator of various radio conditions such as channel access CCT time out or a low battery Programmable Through The Universal Device Connector UDC The entire operation of the radio can be field customized by programming the unit using an IBM PC or compatible computer The programmed personality is stored in non volatile memory within the radio Simple Remote Control Capability External ac cessories can be connected to the UDC such as a headset a speaker mic or a lanyard Connection of the speaker mic allows the operator to remotely control PTT operation and audio level of the exter nal speaker An antenna jack is located on the UDC for the connection of a remote mounted antenna such as when the radio is used in a vehicular charger or repeater Meets MIL 810C and D Specifications The sturdy die cast aluminum case is designed to seal out moisture blowing rain and other harsh envi romental factors Battery Packs Several different battery pack sizes and capacities are available Intrinsically safe bat tery packs are available for use in hazardous envi ronments LBI 38432 e Available Options These options include the an tennas audio accessories batteries2. carrying acces sories chargers lanyards and the vehicular charger repeaters DESCRIPTION The MTL SX portable radio is consists of a two primary assemblies The Front Cover Assembly contains all of the microprocessor circuitry audio circuitry and the operating controls The Rear Cover Assembly houses the RF circuitry which includes the transmitter receiver and the frequency synthesizer The assemblies are electrically interconnected by two single in line type connectors When mated together the assemblies form a weather resistant die cast aluminum case that protects the radio s circuitry from harsh outside environments Power is provided by a battery pack that slides and locks on to the bottom of the radio The radio s on off switch is located on the battery pack The antenna screws on to the top of the unit A side antenna connection is also provided at the UDC for an external antenna or for test purposes This UDC antenna connection is also utilized for external antenna operation when the radio is locked in the vehicular charger or repeater REAR COVER ASSEMBLY The Rear Cover Assembly houses the RF Board in the die cast aluminum case The complete assembly consists of the VHF RF Board aluminum case top antenna jack side UDC antenna jack and various hardware The RF Board s circuitry includes the transmitter re ceiver and the frequency synthesizer This FM circuitry is under complete control of the microprocesso
3. O Q x remand TT TX OUT LAPROCESSOR ORF 5 4 SYN CLOCK 20 SYN DATA RICO 2l SYN ENABLE m d cac LK gv BicompoutS SHIFT EA OSC q g 03 06 MES x AUDIO lt lt INTMIC HI 04 PROCESSOR MIC TX QUT 26 E I PWR SET 31 AN UDC DISCR e J3 P3 SPKR HI 4 RX DISC OU 2 A p SPKR LO i T R a R M Sav NS 52 a f O 56 28 PACK Figure 5 Front Cover Assembly Block Diagram 13
4. first month of opera tion then annually Receiver Check Receiver sensitivity should be checked periodically as an indication of overall receiver operation Cleaning If the unit requires an external cleaning use mild soap and a damp cloth Avoid abrasive cleaners or chemicals which may damage the plastic or rubber surfaces on the unit LBI 38432 TOP COVER 19D902513P2 GASKET 19B801625P1 FRONT CONTROL PANEL 190902561P1 FRONT KEYPAD 19D902560P2 SCREW 19A705937P106 2 PLACES NAMEPLATE 198235139P1 19D438678 Sh 3 Rev 8 Figure 3 Front Panel Parts ERICSSON 2 Ericsson GE Mobile Communications Inc Mountain View Road Lynchburg Virginia 24502 Printed in U S A 11 LBI 38432 BLOCK DIAGRAM ANTENNA RF BOARD 5 1 T Pd i C8 D ezz um LOW PASS PWR CONTROLLER S PWR AMP FILTER Pa 7 5 9 FILTER 237 C36 dj H D2 E pde 1 NOTCH VERD 4 DATA FILTER Ad HR O7 5Y BANDPASS FILTER FLI 2 QUAD COIL BANDPASS Us FILTER nd OSCAMixER AUDIO 4 Fle LIMITER DISCR Figure 4 Rear Cover Assembly Block Diagram 12 BLOCK DIAGRAM LBI 38432 CONTROL BOARD LED DRIVER BOARD EMEGENCY SWITCH BOARD 5 4 54V SWITCH TX 54 SwITCH 012 015 OPWA O7 5V 5 RESET
5. of radio just above the PTT and Monitor Buttons Various equipment such as the audio accessories can be connected to the radio via the UDC The programming equipment is also connected to it when the personality is programmed into the radio The UDC fur nishes an excellent first check point for initial bench checks without the need to disassemble the radio Table 2 lists all pins and their appropriate function When the radio is turned on it senses the resistance value between UDC pins 9 and 1 and switches the appropriate circuits to provide proper radio to accessory operation LBI 38432 PROGRAMMING The radio s personality is programmed using an IBM PC REAR FRONT or compatible computer A full screen portable PC can be COVER COVER used for field programming The Programming Manual and Software is 3339 and 4339 TQ 3339 is supplied CORE ope with 5 1 4 inch floppy disks and 4339 is supplied with 3 1 2 inch disks This software uses a series of screens and windows to guide you through a programming session See TQ 3339 or TQ 4339 for further programming details PC Programming Adapter TQ 3310 and Programming Cable TQ 3311 will also be required These items provide interface and connection between the PC and the radio when the personality is transferred from the PC into the radio NOTE After programming or reprogramming the radio disconnect the programming cable an turn the radio off and then back on
6. ITY BATTERY PAPA1H AAA UNIVERSAL MULTI CHARGER CH6RA1 120 VAC 1HR CH6SA1 120 VAC 14HR CH6RA2 230 VAC 1HR CH6SA2 230 VAC 14HR MULTI CHARGER H2A2L2A 120 VAC 14 HR H2A2J1A 120 VAC 1 HR H2A2M2A 240 VAC 14 HR H2A2N1A 240 VAC 1 HR UNIVERSAL DESK CHARGER CH1RA1 120 VAC 1 HR CH1SA1 120 VAC 14 HR CH1RA2 230 VAC 1 HR CH1SA2 230 VAC 14 HR Carrying Accessories Cc EE jam E C im Swivel Mount Plate 5203 Audio Accessories HEADSET MIC PAAB1A INTERFACE CONNECTOR Provided with PAAB1A COMPACT CHARGER H2A5C2A Vehicular Charger H2A6L2A Desk Charger CARRYING CASE WITH BELT LOOP PAHC1E PAHC1F WITH SWIVEL MT PAHC1G PAHC1H SHOULDER STRAP PAHC1K SPKR MIC PAAE1A GE STAR LANYARD PAAC1B S gt m pusa M RELEASE GENERAL ELECTRIC pra REPEATER OFF oN reo VEHICULAR CHARGER H2V01 Vehicular Charger H2V02 Vehicular Chgr Rptr Control LBI 38432 INTRODUCTION The Ericsson GE MTL SX radio is a high quality mi croprocessor controlled synthesiz
7. LBI 38432A Mobile Communications MTL SX 146 174 MHz PORTABLE TWO WAY FM RADIO TABLE OF CONTENTS REAR COVER ASSEMBLY LBI 38597 FRONT COVER ASSEMBLY EARLIER AND CONTROL BOARD LBI 38514 FRONT COVER ASSEMBLY LATER LESS CONTROL BOARD LBI 38834 SERVICE LBI 38515 Maintenance Manual LBI 38432 TABLE OF CONTENTS Page SPECIFICATIONS ci E A A ek Ret eise 3 OPTIONS AND ACCESSORIES epitope ie dte t e ei te tete n 4 INTRODUCTION ibit stb eee tto de ett te i e ood iii isla 5 2 GB inh Ina Rien HE Ee DE UE LH HERD E DNUS 5 DESCRIPTO Nec e do is etr RR ERR da D da qi e veo bed 6 REAR COVER ASSEMBLY 5 p nun pr EU el Me DEA PER ete rabies Aad 6 ERONT COVER ASSEMBLY 3 2 m pipi 6 ANTENNAS 6 BATTERY PACKS contain ia 6 UNIVERSAL DEVICE CONNECTOR esee 7 PROGRAMMING nn dela eei tol 8 FEATURES PROGRAMMABLE ON A PER CHANNEL BASIS eee 9 FEATURES PROGRAMMABLE ON AN OVERALL RADIO BASIS 9 OPERATOR MANUAL ci atendido t inh eu be tet 9 OPERATING TIPS Seid HR HEURE aaa SE Dele Ee EUR AA P eed d 9 INTRINSICALLY SAFE USAGE 2 op etel ee e e EO tee se wae 9 BATTERY PACKS eene hein ai
8. This action will take the radio out of programming mode and restore normal op eration Figure 2 UDC Pin Out Table 1 UDC Pin Functions INPUT OR PIN NAME OUTPUT USE 1 GROUND Case Ground 3 UDC RX AUDIO Output Test Point For Speaker Audio 4 SW BATT Output Switched Accessory Power 5 EXT PTT Input External Microphone PTT Input 6 TX DATA Input For Programming 7 RX DATA Output For Programming 8 SPARE 9 UDC VOLT Option Accessory Sense Pin 10 T R Output Low Transmit High Receive 11 UDC MUTE Output Low Audio Muted 12 EXT MIC HI Input External Microphone Audio Input 13 EXT EMER Input Lanyard Connection 34 UDC DISCR Output Test Point For RX Audio LBI 38432 FEATURES PROGRAMMABLE ON A PER CHANNEL BASIS e Transmit and Receive Frequencies e Tone or Digital Channel Guard Encode Decode e Type 99 Tone Decode Enabled or Disabled e Transmit Power Level High or Low e Transmit STE On or Off Channel Busy Lockout Enabled or Disabled 9 Carrier Control Timer e Alert Tones On or Off e Switch Crystal Frequency Enabled or Disabled e GE STAR Enabled or Disabled 9 GE STAR sent with Channel Guard FEATURES PROGRAMMABLE ON AN OVERALL RADIO BASIS Minimum Volume Level 9 Power Up Beep On or Off 9 GE STAR And GE STAR Emergency Options 9 Type 99 Tone Group Set Scan with Channel Guard Enabled or Disabl
9. d bands antenna and antenna option PANCID part number 19B234804P3 is a 157 174 MHz orange bands antenna Both of these anten nas are helically designed and mount in the antenna jack on the top of the radio An external antenna can be mounted to the unit via the UDC When an antenna is connected to the UDC the antenna on the top of the radio is disabled BATTERY PACKS The battery pack connects to the bottom of the unit and delivers anominal 7 5 Volts dc to the radio Arecessed on off switch for the radio is located on the battery pack An internal fuse located in the radio s Battery Plate protects the radio and battery from excessive current draw The battery packs are available in several different capacities and sizes Radio contacts located on the top of the pack include switched power ground the speaker enabling contacts and a continuous power contact In addition four contacts are located on the rear of the battery pack These four contacts provide connections to the slip in type chargers or vehicular chargers repeaters while the battery pack is still connected to the unit The battery charging contacts are diode protected from external shorts The chargers utilize an internal thermistor in the battery pack to sense temperature and automatically control charge rate of the battery This allows for a maximum charge rate without overheating the battery pack All battery packs can be charged in less than 1 1 2 hours with the rap
10. e with GE STAR Lanyard Speaker Microphone Antenna Antenna 146 162 MHz Helical Antenna 157 174 MHz Helical Belt Clip Swivel Mount with Belt Loop Case Leather with Belt Loop Short Case Case Leather with Belt Loop Tall Case Case Leather with Swivel Mount and Belt Loop Short Case Case Leather with Swivel Mount and Belt Loop Tall Case Shoulder Strap Leather with Mounting Plate Holster Plastic MAINTENANCE The MTL SX radio is a very reliable unit and will normally provide many years of trouble free service The recommended Preventive Maintenance procedures that fol low should be preformed when a technician comes in contact with a unit Component level troubleshooting information is contained in the Service Section PREVENTIVE MAINTENANCE Antenna The antenna and antenna contact should be kept clean and free from dirt or corrosion If the antenna contact should become dirty or corroded communication range could be reduced Battery Packs Insure the battery packs are properly maintained Do not over or under charge them on a regular basis Verify the contacts are clean and free of corrosion Mechanical Since portable radio units are subject to shock and vibration check for loose plugs knobs screws etc Transmitter Check Check transmit frequency and deviation Normally these checks are made when the unit is first put into opera tion They should be repeated after the
11. ed 9 Priority One Scan Channel is the Selected Channel Fixed Channel or Keypad Entered Channel OPERATOR MANUAL Complete operating details for the MTL SX radio are included in operator manual LBI 38431 OPERATING TIPS Antenna location and condition is important when using a VHF radio Operating the radio in low areas of terrain under power lines or bridges inside of a vehicle or in a metal or steel framed building can severely reduce the range of the unit Mountains and buildings can also reduce the range of the unit In areas where transmission or reception is poor some improvement may be obtained by insuring that the antenna is vertical Moving a few yards in another direction or moving to a higher elevation may also improve communica tion Vehicular operation can be aided with the use of an externally mounted antenna Battery condition is another critical factor in the trouble free operation of a portable radio Observe the procedures listed in the Service Section to insure the battery packs do not develop the Memory Effect Always observe all of the Federal Communication Com mission s rules and regulations during any service or oper ating procedure INTRINSICALLY SAFE USAGE Selected portable radios with appropriate factory in stalled F4 Options are certified as Intrinsically Safe by the Factory Mutual Research Corporation Intrinsically Safe ap proval includes Class I Division 1 hazardous loca tions i
12. ed portable FM radio All transmitter and receiver functions are controlled by the mi croprocessor based circuitry The MTL SX radio s sturdy die cast aluminum case has rotary volume and channel controls on its top panel and three 3 recessed push buttons which provide scan control on its front panel A indicator light on the front panel lights when the radio is transmitting and flashes when and the radio is scanning A recessed emergency button is located on the top of the radio All personality features are programmable with the PC programming software FEATURES 16 Channel Capability The preprogrammed channels are selected with the top mounted rotary Control Knob e Scan Capability With User Selectable Scan List Using two 2 of the buttons on the front panel the operator can add and delete any the programmed channels to the scan list Priority one and priority two scan channels can also be selected A thrid button on this panel is used to toggle scan operation on and off e Volume Control Knob This rotatable control provides quick and easy adjustments to the volume level Minimum volume levels can be programmed into the unit to prevent missed calls due to a low volume setting Monitor Button This side mounted button is used to disabled squelch and if programmed for the se lected channel it is used to toggle CG and or T99 operation on and off e Emergency Channel Feature An emergency channel can be program
13. id type chargers Nominal full charge time in a standard charger is 14 hours The Service Section contains a detailed outline and schematic diagram of a typical battery pack Further service information for the battery packs is also presented in the Service Section Chargers are available with nominal charge times of one hour rapid and fourteen hours standard Combinations include single 1 and multi 5 or 6 position standard and LBI 38432 SIDE VIEW ANTENNA TYPICAL CONNECTOR MONITOR BUTTON ka PTT BUTTON GRIP STRIP ON OFF SWITCH FRONT VIEW ANTENNA TYPICAL red al CONTROL KNOB EMERGENCY ADD BUTTON DELETE BUTTON INDICATOR LIGHT SCAN BUTTON SPEAKER BATTERY gt Figure 1 MTL SX Portable Radio rapid charge units In addition the vehicular chargers repeat ers simultaneously charge the battery while the radio is operating The battery packs should be fully charged in an appro priate charger before they are placed into service This ap plies to new battery packs received from the factory and to battery packs that have been stored for long periods of time A fully charged battery pack should have an open terminal voltage greater than 7 5 Volts typically 9 0 Vdc The low battery alert tone will sound when the battery pack needs charging UNIVERSAL DEVICE CONNECTOR The UDC is located on the side
14. ii 9 ACCESSORIES cuna 10 MAINTENANCE cerati nal biopic 10 PREVENTIVE MAINTENANC E voii a 10 ILLUSTRATIONS Figure 1 MTL SX Portable 7 Eigure 2 oa iia 8 Eigure 3 Front Panel Parts eee RP er per De PPP E DOS 11 Figure 4 Rear Cover Assembly Block 2 1 0 0 eee enne 12 Figure 5 Front Cover Assembly Block Diagram esee eene 13 Table lt UDE Pin Eurnctions ao pint ree Cb dab teg 8 NOTE The software contained in this device is copyrighted by Ericsson GE Mobile Communications Inc Unpublished rights are reserved under the copyright laws of the United States CopyrightO June 1990 Ericsson GE Mobile Communications Inc GENERAL Frequency Ranges FCC Type Acceptance Number DOC Number Channel Capacity Frequency Stability Channel Spacing Operating Temperature Range Maximum Relative Humidity Battery Voltage Dimensions H x W x D less battery knobs and antenna with Extra High Cap Battery Weight less battery and antenna with Extra High Cap Battery TRANSMITTER Rated RF Power Output High Low RF Power Output Maximum FM Deviation FM Hum and Noise Spurious and Harmonic Emissions Audio Response Audio Distortion RECEIVER Sensitivity 12 dB SINAD Adjacent Channel Selectivity Critical Squelch Mod
15. med into the radio for GE STAR emergency signalling GE STAR emergency signalling is activated by the recessed Emegency Button on the top panel of the radio GE STAR can also be activated by a lanyard connected to the UDC Universal Device Connector e GE STAR Compatibility The radio can be pro grammed to transmit GE STAR ID at PTT key at PTT unkey or both 16 384 individual ID codes are available e Programmable Multi Tone Channel Guard CTCSS Channel Guard tone frequencies within the range of 67 Hz to 210 7 Hz including all of the standard EIA frequencies can be programmed for encoded decoded operation Programmable Multi Code Digital Channel Guard Similar capability as with tone Channel Guard is provided Two Tone Sequential T99 Decode Selective calling decode is enabled or disabled on each indi vidual channel Channel Busy Lockout Personality information includes transmit disable capability on a channel where carrier activity is present This feature is selectable on a per channel basis Programmable Carrier Control Timer A pro grammable transmit timer will automatically dis able the transmitter and provide an alerting tone after time out This feature prevents radio damage and unnecessary channel traffic in the event of a stuck mic The CCT is reset on every PTT Programmable Transmit Power Level Transmit ter power level is PC programmable into the radio high or low on a per channel basis
16. n the presence of Groups C D E F and G atmospheres Non Incendive approval includes Class I Di vision 2 hazardous locations in the presence of Groups A B C and D atmospheres Hazardous locations are defined in the National Electri cal Code Useful standards NFPA 437A and NFPA 437M for the classifications of hazardous areas can be ordered from the National Fire Protection Association Batterymarch Park Quincy MA 02269 BATTERY PACKS Only battery packs identified with a green latch shall be used with a portable radio that is rated and labeled as Factory Mutual Intrinsically Safe Use of non specified battery packs voids Factory Mutual approval The following battery pack options are approved for use in intrinsically safe radios PAPAIF Rechargeable Battery Pack 19A704860P6 Extra High Capacity Tall Case PAPAIG Rechargeable Battery Pack 19A704850P6 High Capacity Short Case LBI 38432 ACCESSORIES The accessories that follow are approved for use with intrinsically safe radios Use of accessories other than those listed voids Factory Mutual approval PAABIA 19B801508P3 PAACIA 19B801508P2 PAACIB 19B801508P8 PAAEIA 19B801508P1 PAAEIB 19B801508P4 PAAEIC 19B801508P6 PANCIC 19B234804P2 PANCID 19B 234804P3 PAHCIC PAHCID PAHCIE PAHCIF PAHCIG PAHCIH PAHCIK PAHCIN Headset Microphone Earpiece Kit GE STAR Lanyard Speaker Microphone Speaker Microphon
17. r circuits Con trolling data sent to this assembly from the Control Board includes serial synthesizer data loading transmitter receiver enabling and a transmitter power level signal The RF Board outputs the demodulated audio and a synthesizer lock status line to the Control Board During transmitter operation the RF power appears at the top antenna jack or the UDC jack if the appropriate adapter plug is inserted The Rear Cover Assembly maintenance manual contains a detailed circuit analysis mechanical outline and schematic diagrams for this assembly FRONT COVER ASSEMBLY The Front Cover Assembly houses all of the operating controls and the digital control circuitry for the radio The Control Board is installed in the Front Cover Assembly and flex circuits include the Keypad UDC and Speaker Flex circuits The speaker microphone and Battery Plate are also a part of this assembly The complete assembly is housed in the die cast aluminum front cover The Control Board located in the Front Cover Assembly is the largest and most complex board in the Front Cover Assembly It contains all microcomputer and audio circuitry which controls the radio See the maintenance manuals spe cific to the Control Board or the Front Cover Assembly for service information on the related assembly ANTENNAS Antennas are selected base on the operating frequency range of the radio Antenna option PANCIC part number 19B234804P2 is a 146 162 MHz re
18. ulation Acceptance Intermodulation Spurious and Image Rejection Audio Output Audio Response Audio Distortion LBI 38432 SPECIFICATIONS 146 162 MHz 157 174 MHz AXATR 182 B5 146 162 MHz AXATR 182 C5 157 174 MHz TR 182 D2 16 5 0 ppm 30 kHz 30 C to 60 C 90 at 55 C 7 5 Vdc nominal 140 x 69 x 38 mm 5 52 x 2 72 x 1 50 232 x 69 x 40 mm 9 15 x 2 72 x 1 58 540 grams 19 ounces 907 grams 32 ounces 6 0 Watts 6 0 Watts 1 Watt programmable on a per channel basis 35 kHz 45 dB companion receiver 75 dBc 1 to 3 dB 6 dB octave pre emphasis from 300 Hz to 3 kHz less than 3 at 1000 Hz tone 3 kHz deviation 116 dBm 0 35 uV 80 dB 10 dB SINAD 7 kHz 78 dB 80 dB 500 mW 24 ohm load impedance 2 to 8 dB 6 dB octave de emphasis from 300 Hz to 3 kHz less than 5 at 500 mW These specifications are intended primarily for the use of the serviceman See the appropriate Specifications Sheet for the complete specifications LBI 38432 OPTIONS AND ACCESSORIES Radios Antennas Batteries 146 162 157 174 440 470 EXTRA HIGH CAP BATTERY PAPA1F INTRINSICALLY SAFE EXTRA HIGH CAP BATTERY PAPA1E Chargers HELICAL ANTENNA PANC1C HELICAL ANTENNA PANC1D HELICAL ANTENNA PANC1F HIGH CAPACITY BATTERY PAPA1G INTRINSICALLY SAFE HIGH CAPAC
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