KENWOOD TM-241/441/541 Tranceiver   ooMM 144MHz FM TRANSCEIVER 7\ TM-241 A/241 E m430/440MHz FM TRANSCEIVER TM-441A/441E 1200MHz FM TRANSCEIVER TM-541 A/541 E INSTRUCTION MANUAL KENWOOD CORPORATION ©B62-0031-30 12 11 10 09 08 07 06 05 04 03 Thank you for purchasing this new transceiver. IMPORTANT: NOTE: Please read this instruction manual carefully before placing your transceiver in service. SAVE THIS INSTRUCTION MANUAL CAUTION: Long transmission or extended operation in the HI power mode might cause the rear of this transceiver to get warm. Do not place the transceiver where the heat sink (rear panel) might come in contact with plastic or vinyl surfaces. This instruction Manual covers the following models. TM-241A: TM-241E: TM-441A: TM-441A: TM-441E: TM-541A: TM-541E: 144MHz FM TRANSCEIVER (U.S.A. and general markets) 144MHz FM TRANSCEIVER (U.K. and European markets) 440MHz FM TRANSCEIVER (U.S.A. only) 430MHz FM TRANSCEIVER (General markets) 430MHz FM TRANSCEIVER (U.K. and European markets) 1200MHz FM TRANSCEIVER (U.S.A. only) 1200MHz FM TRANSCEIVER (European markets) If disregarded, inconvenience only, no risk of equipment damage or personal injury. CAUTION: Equipment damage may occur, but not personal injury. I FCC WARNING This equipment generates or uses radio frequency energy. Changes or modifications to this equipment may cause harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose the authority to operate this equipment if an unauthorized change or modification is made. CONTENTS 1. BEFORE OPERATION 2. SPECIFICATIONS 6 3. ACCESSORIES 7 4. INSTALLATION INSTRUCTIONS 7 5. OPERATION CONTROL FUNCTIONS 10 RECEIVER OPERATION Reception 16 Frequency Selection 17 Frequency Step Selection 17 Programmable VFO Tuning Limits 18 ALT(TM-541 A/E only) 19 TRANSMITTER OPERATION 20 Time-out Timer (TOT) 20 MEMORY Microprocessor Memory back-up 21 Initial State 21 Microprocessor Initialization 21 Memory Channel 21 Memory Contents 22 Memory Entry 22 Memory Channel Recall 24 Memory Shift 24 SCAN Scan Operation 25 Hold/Resume Programming 25 Band Scan 26 Programmable Band Scan 26 Memory Channel Scan 27 Memory Channel Lockout 27 Priority Alert Function 28 REPEATER OPERATIONS Transmitter Offsets 28 Reverse Function 29 Tone Operation 29 Tone Frequency Selection 29 Autopatch (U.S.A. version only) 30 TONE / CTCSS OPERATION 30 DTSS (Dual Tone Squelch System) OPERATION 31 DRS (Digital Recording System) OPERATION 34 PAGING 41 TONE ALERT SYSTEM 47 APO (Automatic Power Off) 48 DIM(Dimmer) 48 BEEP 49 LOCK/A.LOCK 49 6. BLOCK DIAGRAM and SCHEMATIC DIAGRAM Another sheet 7. MAINTENANCE 50 IN CASE OF DIFFICULTY 51 8. OPTIONAL ACCESSORIES 52 AWARNING BEFORE OPERATION TO PREVENT ELECTRIC SHOCK, FIRE AND OTHER INJURY. PLEASE NOTE THE FOLLOWINGS: To avoid risk of electric shock,under no circumstances should the unit be opened. Do not place this unit,where it will be exposed to direct sunlight or close to heating appliances. To ensure good ventilation, do not put anything on top of the cabinet and allow at least 15 cm (6 inches) of space behind the unit. ff ~t^> lk k The power requirement is 13.8 VDC. Never attempt connection to a 24 VDC source. Do not place the unit in areas off excessive dust, high humidity or on unstable surfaces. Do not drop pieces of metal, needles, coins and other electrically conductive materials into the unit. Do not touch the power plug, when your hands are wet. Do not pull the power cord, when disconnecting it from the AC wall outlet. Grasp the plug and ensure that your fingers do not touch the live pins. If an abnormal odor or smoke is detected, immediately turn the power off and pull out the power plug. Contact the KENWOOD service station or our dealer. CLEANING 1. Turn the power off, before cleaning the unit. 2. Do not use any type of abrasive pad, thinner, benzine or any substances which may damage the unit. 3. Wipe the front panel and other exterior surfaces of the unit with a soft dry cloth or a soft cloth lightly moistened with water 2 SPECIFICATIONS TM-241A(USA/Canada) TM-241/ \/E TM-441A|U.SA/Canaoa) TM-441A , TM-441E TM-541A/E I i Is <5 d> CD | Frequency range MHz 144 to 148 144 to 1- 46 1 438 to 450 430 to 440 430 to 440 1240 to 1300 Mode F3E(FM) Antenna impedance 500 Operating temperature -200Cto+60°C (-4Tto + 14OT) Power requirements 13.SV DC ±15%(11.7^15£V) Ground Negative Current drain Transmit mode Less than 11A Less than 10A Less than 6A Receiver mode Less than 0.6A Frequency stability Less than ±10ppm Less than ±3pprn Dimensions (WXHXD) (mm) (Projections included) 140X40Xl60(5-l/2llXl-37/64"X6-19/64") (14QX4QX172(5-l/2nXl-37/64"X6-25/32") Weight (kg) 1.2(2.65lbs) k_ OJ -t-f -I-f 1 c/i c TO K Output power 2 HI SOW 35W 10W MID Approx 10W Approx 10W LOW Approx. 5W Approx. 5W 1W Modulation Reactance modulation Spurious radiation Less than -60dB Maximum frequency deviation ±5KHz Audio distortion (at 60% modulation) Less than 3% (300 to 3000 Hz) Microphone impedance 60QQ i_ 0) *o5 % tr Circuity Double conversion superheterodyne Intermediate frequency lst/2nd 3Q.825MHz;455kHz 10.7MHz/4£ >5kHz 30,825MHz/ 455kHz 597MHz/455kHz Sensitivity (12 dBSINAD) Less than 0.25/*V Less than 0.16 ^V Selectivity -6dB: More than 12 kHz -60dB Less than 24 kHz Squelch sensitivity Less than 0.1/^V Less than 0.177 ^V Less than 0,1//V Output (5% distortion) More than 2 W across 8 Q loads External speaker impedance &} 1 Australia: 144 to 148 2 Recommended duty cycle: 1 minute Transmit, 3 minutes Reception Circuits and ratings are subject to change without notice due to advancement in technology. 3 ACCESSORIES Unpack your new transceiver carefully, and examine it for visible damage If the equipment has been damaged in shipment, notify the transportation company immediately. Save the boxes and packing material for future shipping. The following accessories should be included in the box with the transceiver. 4 INSTALLATION INSTRUCTIONS 4-1 INSTALLATION Mounting Bracket When installing the transceiver in a vehicle consider the ease of operation and safety when selecting the location for the mounting bracket. DTMF Microphone 1. Install the bracket using the supplied flat washers (U.S.A. CANADA only) T91-0380-X5 1 ea. and self tapping screws ( 4 pcs.each). or 2. Attach the transceiver loosely using the 4 SEMS Dynamic Microphone screws (GENERAL market only) T91-0379-X5 1 ea. 3. Align ‘the grooves in the bracket with the Dynamic Microphone transceiver’s screws ( Fig. A) and slide the transceiver (EUROPE market only) T91-0382-X5 1 ea. A *°the/elr’ . . . . .. . . , , ,k Microphone Hook 4- Adjust the viewing angie in the bracket to the (U.S.A. CANADA only) J20-0319-24 lea. desired position ( Fig. B). Mobile Mounting Kit 5. Hold the transceiver in place and tighten the 4 SEMS Bracket J29-0436-03 1 ea. screws using the supplied wrench. Screw set N99-0331-05 1 ea. Self tapping Screw (U.S.A. CANADA only) … N46-3010-46 2 ea. Hexwrench W01-0414-04 1 ea. Stacking plate I I o-/–oo–. ,- -, (TM-441A/441E/541A/541E).. J21-4147-14 2 ea. L & IB DC power Cable E30-2111-05 1 ea. f (7=^ V V"" "4 ^ Fuse (TM-241A/241E: 15A).. F05-1531-05 1 ea. C-J)1 ‘ J-\3 (f^> """"—> (TM-441 A/441 E: 10A).. F05-1031-05 1 ea. ,/"[] " /’ ^ ^^^^^1^-^ / (TM-541A/541E: 8A) … F05-8021-05 1 ea. el I-^M^ "(<%^O’ Instruction Manual B62-0031-XX 1 copy C_ _J \}> ]\ ^^ Warranty Card 1 ea. (U.S.A. .CANADA, EUROPE markets only) Fi9-A R9-B r~’f c ^^ 4-2 CONNECTION 4-2-1 Mobile Installations Cautions : 1. Before installing the power cable, be sure to i remove the negative lead from the battery for j safety. |2. After installation and wiring, be sure to double check for correct installation before reconnecting the negative lead to the battery terminal. j 3. If the fuse opens, be sure to check that each ; conductor has not been damaged by short ; circuiting, etc. Then replace with a new fuse of the same rating. 4. After completing the wiring, wrap the fuse holder with heat resistant tape to protect against heat and moisture. 5. Do not remove the fuse even if the power cable is too long. A. Battery Connections Connect the power cable directly to the battery terminals. Using of the cigarette lighter socket will lead to a poor connection, and will result in poor performance. Pay close attention to the polarity of the cables when connecting them to the battery. Make sure the positive { + I and negative { -) lead polarity is correct when connecting to the battery. Engine compartment–jj— Passenger compartment Red ^se nn * ^ f f-^ I Black I * ^–* \ To the \ transceiver AT^n G ?*, ‘ + – ] Select a location where j P the power cable is pro- ; F oX^- } ^\ Make sure the cable does not directly contact the edge of the note by using ] a grommet. ocio f\r k .-J , ig^igu MUI" r 1*101, IHU19- ‘ |^ Battery ! ture or abrasion when t .securing the cable. \*rl I a fire : o If the wiring hole in the fire wall sembie the fuse holder to threat O4I4 ^1 o wall or chassis is too small, disasJ the wire through the hole. From passenger compartment fi^u – ! l’/ ‘ T T ^^rr^=rHM^ l!S ‘^- r-1±^* ^*l I f Thread like this B. Ignition Noise This transceiver has been designed to suppress ignition noise; however, if excessive noise is present, it may be necessary to use suppressor spark plugs (with resistors). 8 4-2-2 Fixed Station A regulated DC power supply (13.8 VDC capable of supplying at least 11 amperes) is required. PS-33 is recommended. 1. Never connect the AC power cable to the AC outlet until all other connections have been made, 2. Before connecting and disconnecting the power connector, be sure to turn OFF the POWER switches of both the transceiver and the DC power supply. 3. Observe polarity of the DC power cable- The transceiver operates on 13.8 VDCT negative ground. Battery polarity must be correct The power cable is color coded : Red -" + (Positive polarity) Black -" – (Negative polarity) 4-2-3 Antenna The type of antenna that is used will greatly affect the performance of the transceiver, Use a properly adjusted antenna, of good quality, to enable your transceiver to perform at its best. The antenna input impedance is 50 ohms. Use 50-ohm coaxial cable such as RG-8U or 8D-2V for this connection. If the antenna is far from the transceiver the use of low loss coaxial cable, such as RG- 8U is recommended. Match the impedance of the coaxial cable and that of the antenna so that the SWR is less than 1.5 to 1. The protection circuit in the transceiver will activate if the SWR is particularly poor (greater than 3 to 1). High SWR values will cause the transmitter output to drop, and may lead to TVI or BCI reports. Caution : We recommend that you install a high quality lightening arrestor in your antenna lines for protection against firerelectric shock,personal injury,or damage to the radio itself. 5 OPERATION 5-1-1 CONTROL FUNCTIONS ® o) OKCNEj 5-1-2 LCD Display Panel CZ) ® On when the Lock function has been activated. On when the All Lock function has been activated. On when the Automatic Lock Tuning function is active. When the ALT system is operating the direction indicator will turn on if the system shifts the receiver frequency. On when the DTSS function has been activated. On when the Digital Recording System is active. On when the Automatic Power Off function has been activated. On when the squelch opens. This level meter indicates the relative receiver signal strength or the relative transmitter power output. Indicates the relative output power setting for transmit. No indicator for high power. On when the Time Out Timer function has been activated. On during transmit. 13 © F / ,16-Tone DTMF keypad (U.S.A. and CANADA version only) These buttons are used to activate the DTMF encoder. ) LOCK key This key will deactivate all functions of the microphone except the PTT function and DTMF key pad. 15 5-2 RECEIVER OPERATIONS Audio confirmation is provided whenever a front panel key is depressed. You can disable this function by pressing the F key for longer than 1 second and then pressing the REV/STEP key. 5-2-1 Receptoin 1. Connect the power supply, antenna, and microphone and then adjust the controls as follows: Power Switch OFF Vol Control Full Counterclockwise Power switch of power supply (Fixed station) OFF SQL Control Full Counterclockwise 2. Turn on the Power Supply and then turn on the transceivers POWER switch. The display should indicate a frequency. Fig.l shows examples of frequencies that will appear on the various models. In addition to the frequency you may see one or more control indicators illuminats on the display, TM-441A TM-241 A/241 E "(U.S.A. version) TM-541 A/541 E H^DOD .,nnnn 1 ^ u.u u u 1UU ,-^n n nn l?Vu,u uu TM441A/TM-441E Note The frequencies shown above are the default frequencies after a microprocessor reset. If the display shows incomplete data or you think the ; displayed frequency is in error you should reset the j Microprocessor. Memory Initialization on page 21. m_j 3. Rotate the VOL control clockwise until a signal or noise is heard coming from the speaker. 4. Rotate the tuning control or press the microphone UP/DWN switches to select an open channel. Then rotate the SQL control clockwise until the noise just disappears and the BUSY indicator turns off. This point is known as the Squelch Threshold point. The squelch control must be adjusted to this setting for the Scan functions to operate properly. 5. Select the desired operating frequency using the microphone or tuning control. When a signal is received the S-meter will deflect and the BUSY indicator will turn ON, Caution Turn off the transceivers POWER switch before you start or stop your vehicles engine, or your home power supply. Fig. 1 16 5-2-2 Frequency Selection You can change the dial frequency while in the VFO mode. The frequency can then also be stored in memory, or in the call channel using the techniques that will be described in this manual. MR key VFO mode VFO key VFO key CALL key \ MEMORY channel mode C CALL key \ X ,.!3 CALL channel mode MR key o VFO Mode Operation Frequency Selection 1. Press the VFO/M ^ V key to select the VFO mode. 2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired frequency. o Memory Channel Selection 1. Press the MR/M key. 2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired memory channel. o CALL Channel Selection Press the CALL key to select the Call channel. 5-2-3 Frequency Step Selection The frequency step is indicated in the chart below. STEP 5+ ±10+ :±15<: ±20+± 12.5+ ±25 TM-241A/E o o o o o o TM-441A/E O o o o o o TM-541A/E X O X o o _o To select the desired tuning or scan step size use the following procedure: L Press the VFO/M ^ V key to select the VFO mode. 2. Press the F key momentarily. The F indicator should light in the display. 3. Press the REV/STEP key within 10 seconds of pressing the F key. The current frequency step size will be displayed. g^OT era I^O °^p (>-) o(S) ^p O(M. 17 4. Rotate the tuning control or press the UP/DWN switches on the microphone until the desired tuning step size appears in the display, 5. To complete the programming of the step size you can press any key on the front panel except the POWER key, or simply wait 10 seconds and the microprocessor will automatically return to the normal frequency display. The chart below shows how the microprocessor will correct a new step size. 5,10,15,20 to 12.5,25 12.5,25 to 5,10,15,20 12.5,25 to 5,10,15,20 0,5.10,15 0 20,25,30,35 i 25 40T45,50,55 50 60,65,70,75, 80,85,90,95 75 i 0 I 0 12.5 10 25 20 37.5 30 50 50 62.5 60 75 70 87.5 80 5-2-4 Programmable VFO Tuning Limits The TM-241/441/541 series radios provide the capability of programming the VFO tuning range, in 1 MHz band segments, as well a providing a separate programmable band scan function(See page 26). For example you could tell the transceiver that you only wish to tune the 144 MHz and 145 MHz band segments. The tuning controls and microphone UP/DWN switches would then only tune within these specific frequency limits. The procedure for specifying these limits is described below. 1. Press the VFO/M^V key to select the VFO mode. 2. Rotate the tuning control or press the microphone UP/DWN switches until the desired tower tuning range appears in the frequency display. For example with the TM-241 you might want to select the 144 MHz band, and dial up 144,100 MHz. 3. Press the F key for longer than 1 second. The F indicator should begin flashing. 4. Press the CALL key within 10 seconds, A long beep will sound and the F indicator will turn off in the display. This indicates that the lower limit has been successfully stored in memory. , . L i i j) i…..^–.:–,- J^ ^&r&>°m A op) (C)D(QT .Q ^^m: % s0 0oC^j Press the key for longer than 1 second. 8. To confirm that the programming was properly performed rotate the tuning control or press the UP/DWN switches. The transceiver should not go above or below the programmed band limits, 9. To clear both programmed limits simultaneously you should initialize the VFO memory using the procedures discussed on page 21. You can reprogram either limit independently by following the appropriate instructions above. 5-2-5 ALT (TM-541A/541E only) The ALT system operates similar to an AFC (Automatic Frequency Control) system. This system is useful when the frequency of either station starts to drift. When this occurs distortion of the signal is the usual result. The ALT system will detect the drift and shift the frequency to compensate. To activate the ALT function 1. Press the F key momentarily. The F indicator will turn on in the display. 2. While the F indicator is on press the DR/DT/ALT key. The ALT indicator will turn on and the receiver will automatically center itself on the incoming signal. ALT Turns on when the transmit frequency of the distant station is lower than your receive frequency. Turns on when the transmit frequency of the distant station is higher than your receive frequency. Note: The frequency display will not actually change, even though the receive frequency might shift in order to properly tune the incoming signal. When the ALT system is operating the Direction indicator in the display will turn on to signal a change in the receiver frequency. The direction indicator will show you if the incoming signal was higher or lower than the displayed frequency. 3. To release the ALT function press the F key momentarily and then the DR/DT/ALT key. 19 5-3 TRANSMITTER OPERATION Caution 1. Ensure that an antenna with a fow standing wave ratio (SWR) is attached to the antenna connector before attempting to transmit. Failure to provide proper termination may result in damage to the final amplifier section. 2. Always check to ensure the frequency is clear before transmitting. Note The use of LOW power is recommended whenever possible, to avoid interfering with other stations. 5-3-1 Transmit Basics 1. Select the desired operating frequency using any of the methods previously discussed. 2. Press the LOW/DIM key to select the desired transmit output. SVfiT’i iiMOB OJ^^ S!W^Ce- ‘_*L; _ m>….. ILJC C nn ‘"O.Duu )u u £)oQ Q00 0Q0_ gw i – C C n n i^aouu Q0Q 0oQ 0. transmit frequency using the Tuning control or microphone UP/DWN switches. (For example 145700MHz) 7. Press the MR/M key within 10 seconds of selecting the transmit frequency. A long beep will sound to signal the data has been successfully stored. 8. To confirm the contents of the Split Memory Channel press the MR/M key and recall the channel. The receiving frequency and -h indicator will appear in the display, 9. To check the transmit frequency press the REV/STEP key or Microphone PTT switch. The transmitting frequency will appear in the display. (crv&: n5*i o0/0o@ 0o(g^ ^-Flashing 6. Scan will begin in an upward direction.You can reverse the direction by rotating the Tuning control counterclockwise, or by pressing the microphone OWN switch. 7. Scan will stop whenever a signal is received (that activates the BUSY indicator) for a limited time, 8. Press the PTT switch or any front panel key to stop scanning. 26 5-5-5 Memory Channel Scan 1. Adjust the SQL control to the threshold point. 2. Press and hold the MR/M key for longer than 1 second. The MHz indicator will flash as a visual reminder the transceiver is scanning. -Press and hold the MR/M key for longer than 1 second. §w uWOO j i o cxr£t Jg>"0 0Q0 0o@ Notes 1. The transceiver will not scan if there is only one memory channel. 2. The transceiver will skip any locked-out channels. 3. The transceiver will scan only the memory channels in which frequencies have been stored. 3. Scan will begin at the current memory channel and proceed sequentially .i.e.Ml -> M2 -> M3 etc. Only those memory channels with data entered are scanned. 4. Scan will stop whenever a signal is received (that activates the BUSY indicator) for a limited time. 5. Press the PIT switch or any front panel key to stop scanning. 5-5-6 Memory Channel Lockout The Memory Channel Lockout function allows you to temporarily skip unwanted Memory Channels during Memory Channel scan. 1 Press the MR/M key to select the Memory Channel mode. Select the Memory Channel that you wish to skip by using the Tuning control or the microphone UP/DWN switches. Press the F key for longer than 1 second, The F indicator will flash. Within 10 seconds of pressing the F key press the MR/M key. A star (*) will appear to the left of the Memory Channel number . This indicates the Memory Channel will be skipped during the Memory Channel scan operation., §w nS.500 . s o –@ : HFT) o(ro") f"vj 0(oi"r – Press the key for longer than 1 second. 4. Repeat steps 2 and 3 to lock out any other Memory Channel that you want to skip 5. To cancel the lockout , select the desired Memory Channels as described in step 1,2,and 3 above. The star (*) will go out. The Memory Channel will now be scanned normally. 27 5-5-7 Priority Alert Function The priority alert function allows you to monitor memory channel 1 for activity even when you are tuned to a different channel number. When the Priority Alert function has been activated the microprocessor will switch the transceiver to the frequency stored in memory channel 1 once every 5 seconds. The transceiver will determine if a signal is present. If no signal is present the transceiver will return to the original frequency. If a signal is present, a beep will sound from the speaker to signal the channel is busy. This whole process takes just a fraction of a second, so you wilt not see the display frequency change. The only thing you will notice is a momentary pause in the signal on the currently displayed frequency. To activate the priority alert function: 1. Ensure the frequency you wish to monitor has been entered into memory channel 1. 2. Adjust the SQL control to the threshold point. 3. Press the F key momen- tarily, and then press nH_Z .^^ the SHIFT/AL key. The fS^TSTf – f AL indicator will turn on "^^ ""O.5uu in the display to remind If j) L~"’ r~~r~",., J" you that this function [^^^QE)0® SQ© @°<8[ has been activated. *" 4. If a signal is present a beep will be heard from the speaker. 5. To turn this function off repeat step 3. The AL indicator will turn off. oa @*e. Note: During the period memory channel 1 is being scanned you will not hear voice communications, only the beep will be heard if a signal is present. 5-6 REPEATER OPERATIONS 5-6-1 Transmitter Offsets All radio repeaters utilize a separate receive and transmit frequency. The receiver frequency may be either above or below that of the transmit frequency. The configuration of most repeaters will fall into one of the categories listed below: TM-241A/ 241E TM-441A TM-441E TM-541A European i i version ; TM-541E + + 600 kHz + 5 MHz + 1.6 MHz; +12 MHz + 35 MHz -600 kHz -5 MHz -1.6MHz; -12 MHz -6 MHz L "- -7.6MHz; -20MHz Offset Direction To select the desired transmitter offset direction press the SHIFT/AL key. Each time you press the key the transceiver will advance from one direction to the next, i.e. "+" to "-" ("-" to " i( with TM-441Eand TM- 541A) to no offset (simplex). Automatic Offset Selection (TM-241A U.S.A. version) The TM-241A has been programmed according to the standard ARRL (Amateur Radio Relay League) Band Plan with regard to transmitter offset direction. Please see the accompanying chart for addition information on this programming. You can, of course, override this by using the SHIFT/AL key if desired. 145.1 145.5 146.0 146,4 146.6 147.0 147.4 147.6 148.0 L§_ -! si + _s_ [^r [sl^ _s^ S: simplex 28 5-6-2 Reverse Function Some repeaters utilize a "Reverse Pair11, i.e. the transmit / receive frequencies are exactly the reverse of another repeater For example repeater A uses 146.000 for a transmit frequency (INPUT) and 146.600 for a receiver frequency (OUTPUT), Repeater B might use 146.600 for a transmit frequency and 146.000 for a receiver frequency. It would be inconvenient to have to reprogram the transceiver each time you wanted to use these repeaters. The REV/STEP key allows you to easily reverse the transmit and receive frequencies. To use the REV function press the REV/STEP key, The REV indicator will turn on in the display to remind you that you are working a reverse pair, To return to normal press the REV/STEP key again. The REV indicator will turn off. This function is also useful to check the input frequency of the repeater so that you can determine if you are within range for simplex communications. 5-6-3 Tone Operation Some repeaters require the use of a control signal to activate the repeater. Several different methods are currently in use, In the United States sut>audib!e tones are sometimes used. 38 different Sub-audible frequencies are possible. In Europe a 1750 Hz tone is used in transmit. Press and hold the Microphone 1750 key to transmit with the access tone; you need not press the PTT key. Since this tone is required in Europe and the United Kingdom a 1750 Hz tone encoder is included with models delivered to these countries. 5-6-4 Tone Frequency Selection 1. Press the F key for longer than 1 second. The F indicator will begin to flash. Press the TONE/T.ALT key within 10 seconds of pressing the F key, The current tone frequency will show in the display. L Press the key for longer than 1 second. 2. Rotate the tuning control or press the microphone UP/DWN switches to select the desired tone frequency. 3. Press any front panel key to return to the normal frequency display. Tone Frequencyf Hz) 67.0 | 107.2 167.9 71.9 110.9 j 173.8 | 74.4 114.8 , 179.9 | 77.0 118.8 186.2 79.7 123.0 192.8 82.5 127.3 203.5 85.4 131.8 210.7 88.5 136.5 218.1 91.5 I 141.3 225.7 94.8 ; 146.2 233.6 I (97.4) j 151.4 241.8 i 100.0 156.7 I 250.3 103.5 162.2 Note : 97.4 Hz is available only for encode. 29 5-6-5 Autopatch Operations (U.S.A. versions only) Some repeaters offer a service known as autopatch. This feature allows you to dial a telephone number from your transceiver and carry out a telephone conversion, much like a car telephone, or cellular telephone. This function requires the use of a DTMF (Dual Tone Multi Frequency) pad. The MC-44DM microphone provides the normal keys you would have on your telephone at home, as well as 4 additional keys, the A,B,C, and D keys. These keys are used for control operator of the repeater to see if they offer autopatch services, To activate the keypad: 1. Press and hold the PTT key, 2. Press the keys just like you would dial your telephone at home. 3. The transceiver will remain keyed for approximately 2 seconds after you press each number, so you can release the PTT switch without unkeying the transceiver. Note: Some repeaters will require the use of a special key I sequence to activate the Autopatch function. You ! should check with your control operator for this sequence. 5-7 TONE/CTCSS OPERATION With the use of the optional Sub-Audible tone decoder unit (TSU-6) you will be able to operate in a Tone Operated Squelch Mode. When this option is installed and the CTCSS function has been activated the radio will not open squelch until the proper PL tone is received. Press the TONE/T.ALT key and select the desired Tone mode. When the T indicator appears in the display the transmitter will transmit the desired tone. When the CTCSS indicator appears in the display the transceiver will transmit the desired tone and will also operate in the Tone Squelch mode. i.e. squelch will not open until the same tone is received as a portion of the incoming receive signal. When no indicator is on the radio will not make use of either tone feature. No indicator CTCSS Note: Even if the TSU-6 is not installed, tone signals can be transmitted, so the tone squelch of the other transceiver can be opened, 30 5-8 DTSS (Dual Tone Squelch System) OPERATION [Requires optional DTU-2] This function allows squelch to be turned on in the receive mode on reception of a three-digit code matching the DTSS code selected in your radio. Once squelch is turned on by reception of a matching code, it operates normally from then on. If no signal is received for longer than 2 seconds, squelch is turned off until a matching code is again received. CTCSS signal cannot pass through the repeater, but DTSS signal can pass through the repeater. _____ PN’OTE " "~ " ~~! This function is not available in some areas. The DTSS (or PAGIMG) cord may not be accepted if the repeater is "identifying". If this should occur you should press the PTT switch again, and retransmit the DTSS (or PAGING) cord. There are two recommended methords of compensating for , this situation. j 1. Press the PTT switch for a few seconds, send the DTSS (or PAGNG) cord, release the PTT switch, then press the PTT switch again and resend the appropriate cord. | 2. Proper DTSS (or PAGING) operation will occur if you ensure | the battery saver circuit is disabled whenever you intend to operate using eithr the DTSS or PAGING modes. 5-8-1 Selecting and Storing the DTSS code DTSS codes from 000 through 999 can be selected from the VFO mode and stored in memory channels Memory channels 1 through 3 can each store a separate DTSS code. Memory channels 4 to 20 and the call channel cannot store DTSS codes, but a DTSS code can be set each mode. 5-8-2 DTSS Code Selection When DTMF unit DTU-2 [option] is installed, the initial setting is 000. DTSS r n n n L UUU o Selecting and Storing the DTSS code with the VFO 1. Press the DR/DT key to light the DTSS indicator. 2. Press the F key, then press the DR/DT key while the F indicator is on (10 seconds). The first digit of the DTSS code will flash. 3. Select the first digit by rotating the Tuning control. 4. Press the DR/DT key. The first digit is registered and the second digit begins to flash. 5. Select the second digit by rotating the Tuning control. 6. Press the DR/DT key, The second digit is registered 31 and the third digit begins to flash. 7. Select the third digit by rotating the Tuning control. 8. Press the DR/DT key and the complete DTSS code is registered, The mode returns to the previous one. o Selecting and storing a code with the DTMF KEY PAD (MC-44DM) 1. Press the DR/DT key to light the DTSS indicator. 2. Press the F key, then press the DR/DT key while the F indicator is on (10 seconds). The DTSS code setting mode will be entered and the first digit of the code will flash. 3. Then enter a three-digit number on the key pad. Notes 1, If a key other than the DR/DT key on the front pannel is pressed during operation, code selection mode is canceled. 2, If no action is taken for longer than 10 seconds, code selection mode is automatically canceled. 5-8-3 Selection using memory channels 1 through 3 o Storing VFO frequencies and DTSS codes at the same time L Select the desired frequency to be stored in memory in the VFO mode. 2. Follow steps 1 through 8 above in the VFO mode. 3. Press the F key 4. Select the desired memory channel (1, 2, or 3) with the tuning control or the UP/DWN key on the microphone. §w ;vS.SSC F 3 o ;r> CB°© B°0 ©"D 5. Press the MR/M key o Rewriting DTSS codes in memory channels (Ito3) 1. Press the F key while the memory channel is operating, then press the DR/DT key while the F indicator is on. The DTSS code setting mode will be entered and the first digit of the code will flash. 2. Store the selected code in memory. Follow steps 1 through 8 in VFO mode to edit a stored code. 32 5-8-4 Using the DTSS function 1. Adjust the SQL control to the threshold point. 2. Press the DR/DT key. The DTSS indicator will light. Each time the DR/DT key is pressed, the DTSS and paging functions will be selected: DTSS: OFF DTSS :ON 1 I DTSS : OFF PAGING:OFFj | PAGING :OFF ^ PAGING :ON -l I ! i DTSS indicator P indicator I lights. lights. o RECEPTION 3, Squelch will open when the proper code is received. o TRANSMISSION 4. When the PTT switch is pressed, the code shown in the figure is sent out for about 0.5 second. PTT ON T PTT OFF T Code (Approx. 0.5 seconds) Note Voice output is muted during code output. 5. To cancel the DTSS function press the DR/DT key twice time. 5-8-5 Using DTSS with a repeater The DTSS signal is transmitted after a short delay if the PTT switch is pressed while the – or + indicator is lit. This is to avoid any malfunction due to the DTSS signal being interrupted by repeaters with long response times o Delay during DTSS output A delay is built in when the DTSS is sent out. The delay time for normal transmission is 250 ms (not modifable). The initial setting for shift, split channel, and duplex is 450 ms, and can be changed to 750, 850, or 1000 ms. o Changing the delay time 1. Turn DTSS mode on. 2. To change delay time press the F key for longer than 1 second and press the CALL key while the F indicator is flashing.( within the 10 seconds.) Display the desired delay time with the tuning control or the UP/DWN key on the microphone. The displayed delay time takes effect immediately. If any other key is pressed or if, after 10 seconds, no key has been pressed, the delay time setting mode is terminated. 33 5-9 DRS (Digital Recording System) OPERATION The optional DRU-1 (Digital Recording Unit) permits you to manually or automatically record up to a maximum of 8 different voice messages for later playback. The automatic recording function works in conjunction with the T.ALT function. This function can be used with the DTSS or paging mode. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. This operation will change the modes as follows: Normal Mode " DRS selection mode DTMF control mode Normal Mode No DRS functions active. DRS selection mode Recording and playback Selectable tone quality level and or number of phrases DRS indicator lights in the display o DTMF control mode 1. Automatic Recording The DRS indicator will flash. 2. The DRS function can be remotely controlled by an external DTMF signal. The DRS indicator goes on continuously. 5-9-1 Before Recording The recording conditions are preset at the factory for the following settings: Tone Quality Level 1 Maximum recording phrase 8 Current Recording Phrase number 1 st. 0 : Recording and playback OK. 1: Recording LOCK. 2 : Recording and playback LOCK. DRS Tone quality level 34 5-9-2 Tone Quality Level Selection 1. DRS indicator fights in the display. 2. Press the TONE/T.ALT key. Each time you press the TONE/T.ALT key the tone quality indicator will advance, i.e. from 1 to 2 to 3 and the back to 1, etc. Tone quality 1 will provide the best audio quality, but the shortest recording time. Tone quality settings 2 and 3 provide longer recording times but with an associated decrease in tone quality. I Tone quality Indicator (gvflr h ssS8 I I I ^_ ,__, ,_Brt*- _T>-J41* *L T-*LT S>"© 0*® 5-9-3 5-9-3 Selecting the maximum number of Phrases 1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. DRS indicator lights in the display 2. Press the SHIFT/AL key. Each time you press the key the maximum phrase indicator will step one position, i.e. from 8 to 4 to 2 to 1 and then back to 8. I MAX. number of phrases nn/7 LtU LJ 8 I I t I "O ;rr’t B°© 0°0 ©’@J Relationship between the maximum number of phrases, sound quality level, and recording (playback) time If the maximum number of phrases is set to 8 and the sound quality level is set to 1 (standard), the recording time for one phrase will be 4 seconds. Since the phrase number goes from 1 to 8, eight different recordings are possible. To increase the recording time, set the maximum number of phrases to 1 and the sound quality level to 3. The recording time will become 96 seconds. In this case, only one phrase can be recorded, so the currently recorded phrase will be erased when a new one is recorded. Set the maximum number of phrases and the sound quality level as required. The recording (playback) time for each phrase cannot be set. Number of maximum phrase Sound quality level 1 2 3 8 4 8 12 4 8 16 24 2 16 32 48 1 32 64 96 (second/phrase) 35 5-9-4 Recording o Recording an incoming receive signal manually. 1. Select the desired operating frequency. Recordings can be made from the VFO mode, the Memory Mode or the Call Channel mode. 2. Press the F key for longer than a second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode. The DRS indicator should turn on in the display. Select the desired phrase number by rotating the tuning control. 3. Press the VFO/M^V key to begin recording. The recording time indicator will show the elapsed time of the recording, I Elapsed time TT^n Q i t 2CuO r i CB"© e°0£ 4. Recording will stop when the time indicator reaches "00". To continue recording from the same frequency rotate the tuning control to the next phrase number and then press the VFO/M^V key again to begin recording. Recording will stop when any front panel key is pressed. o Recording Signals from the Microphone 1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode. The DRS indicator should turn on in the display. Select the desired phrase number by rotating the tuning control. 2. Press the MR/M key to start recording from the microphone. The recording time indicator will indicate the elapsed time of the recording. If you wish to transmit the same message while recording you should press the microphone PTT switch before you press the MR/M key. / U.S.A. \ j- Elapsed time ^ version J -c"S8 I I ,© 0Q0 ©*e. r- v =,-.",’ ! ^000 OGoe i AOOG 3. The recording will stop when the elapsed time indicator reaches "00M. If you wish to continue recording you will need to rotate the tuning control to the next phrase number and press the MR/M key again. Recording will stop when any front panel key is pressed. 36 5-9-5 Play Back 1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode. The DRS indicator should turn on in the display. Select the phrase number of the phrase you wish to replay. 2. Press the CALL key to play back the message. If you wish transmit the message at the same time you should press the PIT key before pressing the CALL key. The elapsed time indicator will begin counting the elapsed time. I-Elapsed time (5vsr zD8 I ! oQ 0o0 Qo^T? J5Q, 3. Playback will stop when the time indicator displays "00". You can manually stop the play back by pressing any front panel key. 5-9-6 Automatic Recording 1. Select the desired operating frequency. Adjust the SQL control to the threshold point. Automatic recording is possible in the VFO mode, Memory Channel mode, or Call Channel mode. 2. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DRS setting mode. Select the desired tone quality, the number of recording phrases, and the beginning phrase number, 3. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing to enter the DTMF control mode. The DRS indicator will flash. 4. Press the TONE/T.ALT key. The T.ALT indicator will light and the recording wait mode (automatic recording mode) will be entered. QVQT – IHS.SOO ? o ;x>’ j9°© e°0 ©°BJ 37 Only a signal with the proper CTCSS tone (if the TSU- 6 is installed ) will initiate recording. If no tone unit is installed the recording will start whenever squelch opens. (The alert function will not sound an alarm.) The CTCSS, DTSS (only reception is possible even if the DTMF unit is not installed), and paging functions are available. If the squelch is closed during recording in the automatic recording mode, recording will finish at the current phrase, and the next phrase will be awaited even if there is recording time remaining. (Recording will not be possible if there is no empty phrase. OLock canceling If the third digit of the display is "l"f recording is locked, and a new signal cannot be recorded in the same phrase. If the third digit is "2", recording and playback are locked, and a new signal cannot be recorded in the phrase and the phrase cannot be played back. To cancel the lock, press the REV/STEP key so that the third digit become zero(O). 5-9-7 External Control of the DRS Function (DTMF control mode) The DRS function can be remotely controlled by an external DTMF signal. 5-9-8 ID Number Seting Select a four-digit number from 0000 to 9999. 1. Press the F key for longer than 1 second, then press the DR/DT key while the F indicator is flashing. The DRS setting mode will be entered and the DRS indicator will light. Press the key for longer than 1 second. 2, Press the MHz / LOCK key. Four digits will be displayed, and the first digit will flash. _vn,nnn ,uu u u ^S^0Q0 0oQ 0o(C? a Group code 789 and your station ID code 111 are transmitted. A DTMF tone sounds is heard during transmitting. 145.660MHz 444*111 Cftf’.Q"" *S.SSQ r? . ooifii.iMfJllli EBBS’ °Q;XT’ \_y\ yy^ JL L^LT ,,£- ^_- ^^^^g)0Q 0o0 00("^J Local station code 444 and your station ID code 111 are transmitted. A DTMF tone sounds is heard during transmitting. 44 5-10-4 Paging Reception (Stand by) 1. Tune to the predetermined frequency. 2. Press the DR/DT key to light the P indicator. Stand by with individual code (Example: Stand by for station 3,) 3. When called with your station ID code, the memory number automatically change to 0. The ID code of the member 3 is displayed. local station code –i- /Flashing * p*m -:& – 3 — T, / fl OVER – Zero is displayed to indicate that your station is being called. 4. The squelch is opened. 5. The individual code of the calling station is stored in memory 0. Press the PTT switch to respond to the calling station. 4 145.660MHz vy 444*111 6^*£T p*m PS.., oMM-M*MViH! ‘ ( )’ o "^ – ‘-^^-^ jtatj ^Wce:© e °e © °©J When the transmission ends, the frequency will be displayed again. After the local station has been contacted, cancel paging mode. Communication can be performed more efficiently. If the local station code can not be decorded, "Err" appears on the display. Err Pn u SSRF – 1 3 S 7 9 OVER \ 45 Stand by with group code 1. When a call is received with the group codet the squelches of all the members of the group are opened to enable reception. When you are called with the group code, the common group code and its memory channel number are displayed. (Example: Group code 789 is stored in channel 3.) Group code Flashing f 1 . j, ~^\ -& -j P183 SSRF 1 3 – S – / H [1VC P ^ 3 is displayed to indicate that the station is being called. 5-10-5 Code Lockout (A code is locked out only during reception with the paging function.) If an individual code is stored in P1,P2 or P3, reception is enabled when the codes match, even if one local station communicates with another. To use memories PI to P3 for transmission only, lock out the memories. When you are communicating with two or more groups having the same frequency, lock out the group code with which stand by is temporarily stopped. o Paging memory lockout 1. Enter the code setting mode and display the number (except memory 0 and A) to be locked out using the tuning control. 2. Press the MR/M key. *rnark lights and the memory is locked out. 2. When the PIT switch is pressed, group code 789 (as displayed) and your station ID code are transmitted. You can participate in the group-roundtable, 3. After the remote station has been called, cancel paging mode. Communication can be performed more efficiently. sw P183 .*£ f^\ [-__ ” 1 jj/ __ TM-241* A. T.*LI 1TLF ^"^r^o^ "o(Q) £>. IN ^^(^00(7) 000 000JJ 3. To cancel, repeat steps 1 and 2. 46 5-11 TONE ALERT SYSTEM The Tone Alert function will provide an audible "Alarm" to signal when someone is transmitting on the frequency you are monitoring. Note | 1. When using the CTCSS function the incoming sigi nal must be present for approximately 2 seconds in order for the Tone Alert function properly. 2. When the DTSS function is on, the bell function works only when the DTSS code matches. 1 3. When the paging function is on, the bell function works only when the paging code matches. 1. Adjust the SQL control to the threshold point. 2. If you will be using the CTCSS function you should select the proper tone frequency and ensure the CTCSS indicator is on. If you will be using the DTSS function you should select the proper DTSS codes and ensure the DTSS indicator is on. If you will be using the PAGING function you should select the proper PAGING codes and ensure the P indicator is on. 3. Press the F key and then the TONE/T.ALT key. The T.ALT indicator will light. £rp"S’h’ W\ JJ, _ Tn-aaiA *t o *-* "" ^ss^Q^© Q°@ (" ,’vS.SOC ^ -Q"3 4. When a signal is received and the squelch is open, an alarm sounds for about five seconds, the T.ALT indicator flashes, and the elapsed time count begins. 5. The elapsed time is displayed in minutes to up to 59 hours 59 minutes. If a new signal is received during counting, the elapsed time is cleared, and the elapsed time from the new signal being received is Counted. Flashing J. S3S3 6. If a key is pressed while the elapsed time is being displayed, the T.ALT function is released. 7. To release the T.ALT function when no signal is being received, press the TQNE/T.ALT key again Notes 1. When the PF key on the microphone is set as the monitor keyT the voice can be monitored by pressing the PF key while the T.ALT function is working. 2. The T.ALT function may fail if the received signal is abandoned (audio low-frequency distortion, ignition noise, etc.). In this case, the interference can be reduced by installing an optional TSU-6 and setting the CTCSS frequency to 141.3 Hz or lower. When a repeater is used, the CTCSS function is not available. It is recommended to use it with the DTSS function, 3. The tone Alert System can not be use in conjunction with Scan. 47 5-12 APO (Automatic Power Off) The automatic power-off function turns the power off automatically if you forget. It does not operate during scanning. The initial setting is OFF. 1. To turn the APO function off and on, press the F key for longer than 1 second, then press the MHz/LOCK key within 10 seconds. The APO indicator lights. 2. If, after 2 hours 59 minutes in inactive receive mode, no key has been pressed, the APO indicator flashes and a beep sounds. If no key is pressed for 1 minute after that, the display indicates the following, all the functions are disabled, and the transceiver enters the automatic power-off state. X>Y Ifi .^’ri’U’i Si ill- ^Wc©;© M^ 5-13 DIM (DIMMER) The intensity of dial illumination can be set to one of four levels. 1. Press the F key, then press the LOW/DIM key while the F indicator lights. £/? 0-0 ©" 2. Select the desired value with the tuning control or the UP/DWN key on the microphone. 3. If, after 10 seconds, no key has been pressed, the displayed level is set and the original frequency is redisplayed. 3. To leave the automatic power-off state, turn the power switch off and on again. r " o o "-o ~~" o " ‘ i Notes 1. A small current flows during the automatic power off state. If the transceiver is not going to be used, be sure to switch the power off. 2. If the APO function is turned on and then the bell function is turned on, the automatic power-off function does not work until the bell function is turned off (though the indicator lights). 3. This function is not available when the remote controller is connected. 48 5-14 BEEP The beep can be turned on and off. Press the F key for longer than 1 second, then press the REV/STEP key while the F indicator is flashing. Each time this is done, the beep is turned on or off. *- Press the key for longer than 1 second, 545 LOCK/A.LOCK There are three types of lock functions. ©Microphone key lock When the switch on the rear of the microphone is set to the LOCK position, all the microphone keys except the PTT key are disabled. ^^ (DLOCK The panel keys (except F and MHz/LOCK key) and the tuning control are disabled. However, the microphone function works. Press the F key, then press the MHz/LOCK key within 10 seconds. The LOCK indicator lights. uS.500 000 ©D@ To release the lock, press the F key again, then press the MHz/LOCK key within 10 seconds. ^ ^Sk/^] 2. Carefully remove the top fefe^S^^V^x cover.. (Fig.l ) r^^^r^^ 3. Remove the backing from ^^^^jjx^ the small cushion provided Detent with the TSU-6 and attach r.a * it to the back of the TSU-6 9′ as shown in Fig. 2. x TSU-6 untt 4. Attach the cable from /" Anach the cab|e TSU-6 as shown in Fig. 2. cushion^ c-^>< ^*L 5. Remove the backing from ^^^^::^-^^_ the other side of the small ^x^t^rN^^^fe^, cushion and attach the ^< ^^ff^^^^^^^ TSU-6 to the transceiver as fa.\^ fi^J’ "^ shown. \^\ ; ^^/^^^^ 6. Replace the cover and ^<^ ^\ tighten the screws to ^-v complete the installa- ^<- tion. Fig, 2 Detent Fig. 1 TSU-6 unit Attach the cable. Digital Recording Unit DRU-1 1. Remove the 2 screws securing the Top cover. Carefully remove the top cover. (Fig. 1) 2. Attach the three cables from the DRU-1 in the transceiver as shown in Fig. 3. Don’t forget to attach the TSU-6 as shown if you are installing this unit at the same time (Fig. 4). Fig. 3 TSU-6 Attach the cushions \ Route the wiring 3. Tighten the screws (Fig. 5). 4. Replace the cover and tignten the screws to complete the installation. Fig. 4 Fig, 5 54 DTMF unit DTU-2 1. Remove the 2 screws securing the Top cover. 2, Carefully remove the top cover. (Fig.l ) 3. Remove the backing from the small cushion provided with the DTU-2 and attach it to the back of the DTU-2 as shown in Fig. 2 4. Plug the three connectors into the sockets in the units. 5. Attach the cable from DTU-2 as shown in Fig. 2 and 3. 6. Replace the cover and tighten the screws to complete the installation. Olnstalling TSU-6 and DTU-2 Attach these units on the top of VCO shield (Fig.3). DTU-2 Detent Fig. 1 DTU-2 Cushion Fig. 2 TSU-6 Cushion TCXO Fig. 3 55 CO irt Q o I LU ^. ================================================================================ **Disclaimer:** This guide is volunteer-submitted and provided "as is" without warranty. Use caution and verify all information before proceeding. "I Can Work This Thing" assumes no responsibility for accuracy, safety, or any damage/injury resulting from use. For complex or dangerous procedures, consult qualified professionals. Report issues or suggestions to https://icanworkthisthing.com ================================================================================