TM-241 User Manual
Contents
1. 29 Tone Frequency Selection 29 Autopatch U S A version only 30 TONE CTCSS OPERATION 30 DTSS Dual Tone Squelch System OPERATION RR 31 DRS Digital Recording System OPERATION RE RR des 34 PAGING EV 41 TONE ALERT SYSTEM 47 APO Automatic Power Off 48 DIMCUimmab xe eet cater danse 48 essai 49 LOCK A LOOK 49 BLOCK DIAGRAM and SCHEMATIC DIAGRAM Another sheet MAINTENANCE 50 IN CASE OF DIFFICULTY 51 8 OPTIONAL ACCESSORIES 52 A WARRING 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 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 the power2. NOTE 1750 Hz repeater access tone is only available from MC 44E or MC 44DME European version microphone 52 TSU 6 PG 3G CTCSS UNIT DC LINE NOISE FILTER E DRU 1 M PG 2N DIGITAL RECORDING DC POWER CABLE UNIT B MB 201 W MB 12 MOBILE MOUNTING BRACKET MOBILE MOUNTING BRACKET 53 Installing accessories __ CAUTION power supply or battery or damage may occur the equipment l l 2 You can not install the digital recording unit DRU 1 and the DTMF unit together 1 Before installation be sure to disconnect the DC You should choose one unit to install CTCSS unit TSU 6 The use of the optional sub audible tone decoder TSU 6 allows CTCSS Tone Mec operation When this op tion is active squelch will only open when the proper tone is received Installation 1 Remove the 2 screws secur ing the Top cover os 2 Carefully remove the top cover Fig l SRY 3 Remove the backing from S the small cushion provided nem with the TSU 6 and attach Fig 1 it to the back of the TSU 6 as shown in Fig 2 4 Attach the cable from TSU 8 unit TSU 6 as shown in Fig 2 Cushion gt lt 5 Remove the backing from the other side of the small cushion and attach the TSU 6 to the transceiver as shown 6 Replace the cover and tighten the screws to complete the installa VV tion Fig 2 54 Digital Recording Unit DRU 1 1 Remo
3. 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 lA 5458 75 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 TONE T ALT key again Notes 1 When the PF key on the microphone is set as the monitor key the voice can be monitored by press ing 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 igni tion 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 1 6 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 15 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
4. 0 m m A EN 6 80 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 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 DTMF Microphone U S A CANADA only or Dynamic Microphone GENERAL market only or Dynamic Microphone EUROPE market only Microphone Hook U S A CANADA only Mobile Mounting Kit Bracket Screw set Self tapping Screw U S A CANADA LL Hex wrench saad Stacking plate TM 441A 441E 541A 541E T91 0380 X5 1 ea T91 0379 X5 1 ea T91 0382 X5 1 ea J20 0319 24 1 ea J29 0436 03 1 ea N99 0331 05 1 ea N46 3010 46 2 ea W01 0414 04 1 ea J21 4147 14 2 ea DC power Cable E30 2111 05 1 ea Fuse TM 241A 241E 15A 5 1531 05 1 ea TM 441A 441E 10A FO5 1031 05 1 ea TM 541A 5A1E 8A FO5 8021 05 1 ea Instruction Manual 62 0031 1 copy Waranty Card rorot EE Fx MS l ea U S A CANADA EUROPE market s only 4 INSTALLATION INSTRUCTIONS 4 1 INSTALLATION Mounting Bracket
5. 2 Rotate the tuning control or press the microphone UP DWN switches to select the desired memory channel 24 5 4 8 Memory Shift This feature copies Memory Channel or Call channel data to the VFO This will allow you to recall and alter these frequencies without changing the actual contents of the memory or CALL channel 1 Press the MR M key or CALL key to select the MR mode or CALL channel mode 2 Press the F key The F indicator will light 3 Press the VFO MPV key within 10 seconds of pressing the F key The F indicator and the Memory or CALL Channel indicator will turn OFF to signal the data has been successfully transferred to the VFO If an Odd Split Memory channel is selected only the receive data will be copied 5 5 SCAN When the scan function is turned on turn the tone alert function off If the tone alert function is on scan will not activate 5 5 1 Scan Operation The following scan options are available 1 Band scan Scan proceeds over the entire band This function op erates in the VFO mode only 2 Programmable band scan The scan frequency range is determined by the fre quencies stored in Memory Channels 11 and 12 This function operates in the VFO mode only 3 Memory channel scan Scan proceeds thru those memory channels that actually have data entered and have not been locked out This function operates in the Memory Channel mode only 5 5 2 Hold Resume
6. 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 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 Turns on when the transmit frequency of the distant station is higher than your receive frequency Turns on when the transmit frequency of the distant station is lower 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 f
7. 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 Output 5 distortion 2 SPECIFICATIONS 241 TM 441Ausaicanaca 441 Frequency range MHz 430 to 440 1240 to 1300 Antenna impedance E Operating temperature Power requirements Ground Negative gramen Less than Less than 0 6A Frequency stability Less than 10ppm Dimensions WXH XD mm Projections included 140 x40 X 160 5 1 2 1 37 64 6 19 64 140X40X172 51 2 x 1 37 64 X 6 25 32 Weight kg Hl 50W Output power 2 MID Approx OW aoiw CdS 5 LOW Approx 5W E Spurious radiation Less than 60 dB Audio distortion at 60 modulation Less than 3 300 to 3000 Hz Intermediate frequency lst 2nd 30 825MHz 455kHz Selectivity 6dB More than 12 kHz 6008 Less than 24 kHz d More than 2 W across 8 Q loads External speaker impedance gt
8. dis played 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 45 Stand by with group code 1 When a call is received with the group code the squelches of 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 m iz 183 1 35 Y DVE AR Bis displayed to indicate that the Station is being called 2 When the PTT 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 46 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 to 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 Pag
9. for longer than 1 second 5 15 LOCK A LOCK There are three types of lock functions D 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 2 LOCK The panel keys except F and MHz LOCK key and the tuning control disabled However the microphone function works Press the F key then press the MHz LOCK key within 10 seconds The LOCK indicator lights To release the lock press the F key again then press the MHz LOCK key within 10 seconds A LOCK ALL LOCK All operations except the power switch volume and squelch are disabled Switch the power off while the LOCK indicator is on hold down the MHz LOCK key and switch the power on again The A LOCK indicator lights 1 To release A LOCK switch the power off while the A LOCK indicator is on hold down the MHz LOCK key then switch the power on again The A LOCK operation cannot be canceled by VFO or MR reset 49 7 MAINTENANCE 7 1 GENERAL INFORMATION Your transceiver has been factory aligned and tested to specification before shipment Under normal circumstances the transceiver will operate in accordance with these operating instructions All adjustable trimmers and coils in your transceiver have been adjusted at the factory and should only be readjusted by a qualified technician with proper test equipment Attempting service o
10. in memory select the VFO mode When the DRS unit is not installed and the DTMF unit is 2 Select the desired operat ing frequency offset tone installed frequency etc For exam ple 145 500MHz CH1 3 CH4 6 CH7 10 CH11 20 YES Freq SIMPLEX freq odd split 3 Press the F key The F Tone freq YES indicator and a memory 099 6577 E Tone CTCSS ON OFF channel indicator will VFO freq step YES YES YES YES light For example CH 8 E Shift REV ON OFF DTSS cord DTSS ON OFF 4 Select the desired Memory NO Channel using the Tuning control or microphone When the DRS unit is installed and the DTMF unit is UP DWN switches not installed For example CH 5 y YES 95500 F 5 CH7 10 CH11 18 YES 5 Press the MR M key within freq odd splity NO NO YES NO 10 seconds of selecting the Tone freq Memory Channel 1 and the F indicator and the YES Memory Channel number YES YES NO YES will turn OFF and the DTSS cord DTSS transceiver will return to ON OFF NO NO NO the VFO mode 22 Odd Split Channels transmit frequency using 1 Press the VFO MP V key to the Tuning control or mi select the VFO made Eee UP DWN switch 2 Select the desired receiv For example ing frequency tone fre 145 7OOMHZz quency etc For example 145 600MHz 7 Press the MR M key within 10 sec
11. of recording phrases and the beginning phrase number Press the F key for longer than 1 second then press the DR DT key while the F indicator is flashing to en ter the DTMF control mode The DRS indicator will flash Press the TONE T ALT key The T ALT indicator will light and the recording wait mode automatic re cording mode will be entered a b 6 m 72414 T 1 171 O Ge 37 5 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 6 11 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 f the third digit of the display is 1 recording is locked and a new signal cannot be recorded in the same phrase 11 the third digit is 24 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 38 5 9 7 External Control of the D
12. of sale or other proof of purchase showing the date of sale 50 7 3 INCASE OF DIFFICULTY The problems described in this table are failures caused in general by improper operation or connection of the transceiver not by defective components Check according to the following table Symptom Probable cause Corrective action Indicators do not light and no receiver noise is 1 Bad power cable or connections 21 Check cables and connections heard when the POWER switch is turned on 2 Blown power supply fuse 2 Check for the cause of the blown fuse and replace the fuse No sound from the speaker No signal can be 1 Squelch is closed 21 Turn the SQL control counterclockwise received 2 With the TSU 6 CTCSS is operating 2 Me the TONE T ALT key to turn off the No transmitter output 1 Microphone is not plugged in Plug jack in 2 Poor antenna connection i2 Connect antenna securely Weak signal cannot be received Poor antenna connection i Connect antenna securely Display is dark 21 Power voltage is low 1 Check voltage for 13 8 VDC 15 76 2 The DIM had been selected too dark 2 Press the F key and the LOW DIM key See page 48 Memory cannot be backed up Back up battery voltage is low See Microprocessor memory backup page 21 The displa
13. or CALL channel mode Pressing this key will allow the tuning control and microphone UP DWN keys to increase or decrease the operating frequency Press and hold the key for longer than 1 second to initiate VFO scan Pressing the key after scan has been initiated will cause scan to stop Pressing the key within 10 seconds of pressing the F key will copy the memory channel or cal channel data to the VFO This allows you to change parameters of that channel without actually changing the data that has been stored in memory Pressing the F key for longer than 1 second and then pressing the VFO key will cause radio to toggle the hold resume mode between Time Operated scan and Carrier Operated scan If you press and hold the VFO key while you turn on the POWER switch you will reset the microprocessor s VFO memory without destroying the memory channel or call channel data MR M key This key is used to select MR Memory Recall mode from the VFO mode The tuning control can then be used to select the desired Memory channel Pressing the key for longer than 1 second will initiate memory channel scanning Pressing the key within 10 seconds of pressing the F key will store the displayed data into memory In the MR channel mode pressing the F key for longer than 1 second and then pressing the MR key will cause the Memory channel to skip during Memory channel scan mode If you hold and press this key while you turn on the P WE
14. out any other Memory Channel that you want to skip 5 To cance 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 mem ory 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 mem ory 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 will not see the display frequency change The only thing you will notice is a momentary pause in the signal on the currently dis played frequency To activate the priority alert func tion 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 the SHIFT AL key The AL indicator wil turn on in the display to remind you that this function has been activated 4 f a signal is present a beep will be heard from the speaker 5 To turn this function off repe
15. the MR M key for longer than 1 sec ond 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 Notes 1 The transceiver will not scan if there is only memory chan nel 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 1 M2 etc Only those memory channels with data entered are scanned 4 Scan will stop whenever a signal is received that ac tivates the BUSY indicator for a limited time 5 Press the PTT switch or any front panel key to stop scanning 9 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 2 Select the Memory Channel that you wish to skip by using the Tuning contro or the microphone UP DWN switches 3 Press the F key for longer than 1 second The F indica tor 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 Press the key for longer than 1 second 4 Repeat steps 2 and 3 to lock
16. transmit the same message while recording you should press the microphone PTT switch before you press the MR M key U S A version Elapsed time The recording will stop when the elapsed time indicator reaches O0 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 5 9 5 l Play Back 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 Press the CALL key to play back the message If you wish transmit the message at the same time you should press the PTT key before pressing the CALL key The elapsed time indicator will begin counting the elapsed time Elapsed time 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 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
17. 47 4 147 6 148 0 mE 15 151 15 1 151 5 nn i simplex 5 6 2 Reverse Function Some repeaters utilize a Reverse 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 fre quency It would be inconvenient to have to reprogram the transceiver each time you wanted to use these re peaters The REV STEP key allows you to easily reverse the trans mit 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 re verse 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 ac tivate the repeater Several different methods are cur rently in use In the United States sub audible 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 ac cess tone you need not press the PTT key Since this tone is requ
18. 6 Record with the phrase Unlock recording of Set 2 for the number the 6th phrase of phrases Unlock recording of Set 4 for the number the 7th phrase of phrases i 1 Record with the phrase Unlock recording of 5 8 for the number the 8th phrase of phrases Automatic recording Automatic recording mode on mode off 08 Record with the 8th phrase 7 18 19 Record with each 09 phrase for which re cording is not locked 40 5 10 PAGING The paging function is available when the optional DTMF unit DTU 2 is installed The paging function is useful to call all stasions a group a specific station or wait for a call from another station by using DTMF Duai Tone Multi Frequency signaling Example When station 2 is called 7 145 660MHz 333 Station2 s Your code code 145 660MHz Your code Ili Station2 s code 333 45 860 2 F 145 66040 45 660 2 individual code 222 individual code 333 Individual code 444 Station EIMS Station 3 Station 2 The common group code and individual codes should be determined in advance These codes should be from 000 to 999 3 digits Unlike DTSS the code of the calling station is displayed on the receiver so the receiver can identify the calling station When called by a local station the individual code of the calling station is display
19. COO AN3 144MHz FM TRANSCEIVER TM 241A 241E 430 440MHz FM TRANSCEIVER TM 441A 441E 1200MHz FM TRANSCEIVER TM S41A S41E INSTRUCTION MANUAL KENWOOD CORPORATION Thank you for purchasing this new transceiver IMPORTANT Please read this instruction manual carefully before placing your transceiver in service SAVE THIS INSTRUCTION MANUAL CAUTION Long transmission or extended operation in the power mode might cause the rear of this i i transceiver to get warm Do not place the transceiver where the heat sink rear panel might come in contact with plastic vinyl surfaces This instruction Manual covers the following models TM 241A 144MHz FM TRANSCEIVER U S A and general markets TM 241E 144MHz FM TRANSCEIVER U K and European markets 441 440MHz FM TRANSCEIVER U S A only TM 441A 430MHz FM TRANSCEIVER General markets 441 430MHz FM TRANSCEIVER U K and European markets 541 1200MHz FM TRANSCEIVER U S A only TM 541E 1200MHz FM TRANSCEIVER European markets NOTE lf disregarded inconvenience only no risk of equipment damage or personal injury CAUTION Equipment damage may occur but not personal injury FCC WARNING This equipment generates or uses radio frequency energy Changes or modifications to this equipment may cause harmful interference unless the expressly approved the modifications are inst
20. If after 2 hours 59 minutes in inactive receive mode no key has been pressed the APO indicator flashes 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 3 To leave the automatic power off state turn the power switch off and on again Notes power off turned on the automatic power off function does not work un til the bell function is turned off though the indicator lights 3 This function is not available when the remote controller 15 con nected 48 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 2 f the APO function is turned on and then the bell function is 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 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 dis played level is set and the original frequency is redis played 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
21. L key to select the Cail channel N 5 2 3 The frequency step is indicated in the chart below Frequency Step Selection 241 441 541 To select the desired tuning scan step size use the following procedure 1 Press the VFO MP 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 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 compiete 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 9 10 15 20 to 12 5 25 12 5 25 to 5 10 15 20 0 5 10 15 20 29 30 35 40 45 50 55 60 65 70 75 80 85 90 95 5 2 4 Programmable VFO Tuning Limits The 241 441 541 series radios provide the capabil ity of programming the VFO tuning range in 1 MHz band segments as well a providing a separate program mable 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 segm
22. LE LLLI ii Group code 789 and your station ID code 111 are transmitted A DTMF tone sounds is heard during transmitting 44 Calling a specific station Example Call station 3 To call a specific station for example station O 3 use the following procedure 1 Select the memory in which the local station code is stored in this example select memory P2 or Enter the individual code of the local station in memory O 2 Press the PTT key once or press a key other than DR DT or MR M to display the frequency again 3 Press the PTT switch 145 660M Hz 444 111 Local station code 444 and your station ID code 111 are transmitted A DTMF tone sounds is heard during transmitting 5 10 4 Paging Reception Stand by 1 Tune to the predetermined frequency 2 Press the DR DT key to light the P indicator patang by with individual code Example Stand by for station 3 3 When called with your station ID code the memory number automatically change to The ID code of the member 3 is displayed Zero is displayed to indicate that your station is being called 4 The squelch is opened 2 The individual code of the calling station is stored in memory O Press the PTT switch to respond to the calling station 145 660MHz 444 111 EYE P4yy ua FA O ene Saas CX l When the transmission ends the frequency will be
23. Pay close attention to the polarity of the cables when connecting them to the battery Make sure the positive and negative lead polarity is correct when connecting to the battery Engine Passenger compartment Fuse R Select a location whare E the power cable is pro l tected from heat mois ture or abrasion when Securing the cabe Red 9 To the transceiver Make sure the cable does not directly contact the edge of the hole by using a grommet cable Chassis or ee PENES fire wall Battery W f the wiring hole in the fire wall or chassis is too small disas semble the fuse holder to thread the wire through the hole From passenger compartment 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 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 outlet until 81 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 VDC negative ground Battery polarity must be correct The power cabl
24. Programming The transceiver will stop on a busy channel Two type of scan hold resume have been provided in this transceiver Time operated scan Scan will resume approximately 5 seconds after stop even if the station is still present G Carrier operated scan Scan will hold as long as the signal is present and will resume scan 2 seconds after the signal drop out i Note When CTCSS is on scanning stops only at the stations for which the CTCSS signal matches When DTSS is on the scanning stops and audio signals are received i only when the DTSS code matches This transceiver is delivered from the factory in the Time operated scan mode To switch between the two eee use the following procedure 1 Press the F key for longer than 1 second The F indicator will flash 2 Within 10 seconds of pressing the F key press the VFO MP V key This will toggle the Scan Resume mode to Carrier operated mode 3 To return to Time operated mode repeat steps 1 and 2 25 5 5 3 Band Scan 5 5 4 Programmable Band Scan 1 The lower scan limit must be stored in memory 1 Press the 70 key to select the VFO mode nel 11 The higher scan limit must be stored in mem 2 Adjust the SQL control to the threshold point ory channel 12 Press and hold the VFO 7 MPV key for longer than 1 Notes If the frequency in Memory Channel 11 is equal to or second 0 reater than the frequen
25. R switch you will clear all the microprocessor s operator programmed memory section 3 MHz LOCK key This key is used to tell the microprocessor that you wish to increase or decrease the operating frequency in 1 MHz increments Pressing this key within 10 seconds of pressing the F key will cause the key lock function to activate protecting the currently displayed data from accidental erasure Pressing the F key for longer than 1 second and then pressing MHz LOCK key while the F indicator is flashing will turn the AUTOMATIC POWER OFF function on or off See page 48 ps A E 7 LEE wee BOs cos it Y sep CALL key Press this key to activate the call channel function Press the F key momentarily and then press the CALL key to store the currently displayed data into the CALL channel The radio will allow you up to 10 seconds to press the CALL key after pressing the F key Pressing the F key for longer than 1 second and then pressing the CALL key will store the currently displayed data as the lower limit for the programmable VFO tuning limit function 5 SHIFT AL key SHIFT function Pressing this key alone to select the desired transmitter offset direction Pressing the key will cause the radio to shift from one offset direction to the next to to simplex where no indicator shows to for European versions AL function Pressing th
26. RS Function DTMF control mode The DRS function can be remotely controlled by an external DTMF signal 5 9 8 10 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 3 Set the first digit with the tuning control then press the MHz LOCK key The second digit will flash 4 5 the second digit with the tuning control then press the MHz LOCK key The third digit will flash 5 Set the third and fourth digits When the fourth digit has been set the DRS setting mode will be automatically reentered The digits can be set with the MC A4DM option Perform steps 1 and 2 and key in the number with the numeric keys Each time a key is pressed a digit is set When all the digits have been set the frequency will be displayed again 5 9 9 Setting the Contro Mode 1 Select the receive frequency 2 Enter the DRS setting mode and specify the number of phrases sound level and ID number See Sections 5 9 1 2 5 9 5 and 5 9 8 3 While in this state press the F key for longer than 1 second then press the DR DT key while the F indica tor is flashing The frequency will
27. When installing the transceiver in a vehicle consider the ease of operation and safety when selecting the location for the mounting bracket 1 Install the bracket using the supplied flat washers and self tapping screws 4 pcs each 2 Attach the transceiver loosely using the 4 SEMS screws 3 Align the grooves in the bracket with the transceiver s screws Fig A and slide the transceiver to the rear 4 Adjust the viewing angle in the bracket to the desired position Fig B 5 Hold the transceiver in place and tighten the 4 SEMS screws using the supplied wrench 4 2 CONNECTION 4 2 1 Mobile Installations Cautions 1 Before installing the power cable be sure to remove the negative lead from the battery for safety 2 After installation and wiring be sure to double check for correct installation before reconnecting the negative lead to the battery terminal 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
28. at step 3 The AL indi cator will turn off 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 28 5 6 REPEATER OPERATIONS 5 6 1 Transmitter Offsets All radio repeaters utilize a separate receive and trans mit 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 TM 441A 241 TM 441E TM 541A TM 541E European i version 600 kHz 1 6MHz 12 MHz 35 MHz 5 MHz 1 6 MHz 12 6 MHz 600 kHz 7 6 MHz 20 MHz 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 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 1
29. be displayed again and the DRS indicator will flash 1 DOD Press the key for longer than 1 second 4 Press the F key The DRS indicator will stop flashing and stay on The transceiver will be ready to be con trolled remotely The automatic recording mode will be ignored as will the DTSS and paging modes 5 9 10 External Control Method For external control recognition code or will transmit a four digit ID number and three digit command code 1234 X01 Leading zeroes in the ID number can be omitted List of DTMF commands See next page Note To transmit a DTMF signal press a key within five seconds of pressing the preceding key If there is a time delay of longer than five seconds the DTMF signals that have been transmitted will be cleared 39 Unlock recording of 59 all phrases u Unlock recording of 1 for the tone the first phrase quality phrase 12 Unlock recording of Set 2 for the tone 02 Record with the second phrase quality do 13 Unlock recording of Set 3 for the tone 03 Record with the third the third phrase quality phrase 4 Unlock recording 04 Record with the 4th the 4th phrase phrase Unlock recording of Set 1 for the number the 5th phrase of phrases Record with the phrase O
30. channel frequency step tone frequency scan direction etc 3 VOL control This control is used to adjust the volume from the internal and external speaker if used Clockwise rotation will increase the volume and counterclockwise rotation will decrease the volume SQL Squelch control This control is used to select the desired squelch threshold level 10 ALOCK FEV gt 99606885588 AL CTCSS g i 5 LOW DIM key LOW This function is used to select the transmit output power level MID Except TM 541A E or LOW DIM This function is used to select the intensity of the front panel display illumination See page 48 Pressing the F key for longer than 1 second and then press the LOW DIM key while the F indicator is flash ing will turn the time out timer function on and off 6 Microphone connector Attach the supplied microphone to this connector pin out of the connector is shown in the accompanying illustration GND T GNO Microphone audio MIC Microphone Audio 3 RX Audio Output 2 PTT Approx 100 mV 10 ohm Push to Talk 3 DWN UP 5 VOC Max 150 mA KENWOOD mm v 969 ALOCK AL T cxnsessssszessENB 74 24 57 a 2 T ITEP 1 3 DIR D VFO Mb V key This key is used to return to VFO operation after operating in the MR
31. cy stored in Memory channel The MHz indicator will flash as a visual reminder the 5 A will 2 2 the entire And transceiver is scanning Scan Press and hold the VFO MPV key for longer than 1 second Adjust the SQL control to the threshold point Press the VFO MPV key to select the VFO mode Select a VFO frequency between the two programmed scan limits Press and hold the VFO MPV key for longer than 1 second The MHz indicator will flash as visual reminder the transceiver is scanning lt Flashing Press and hold the VFO MPV key for longer than 1 second 91 4 Scan will begin in an upward direction You can reverse the direction by rotating the Tuning control counterclockwise or by pressing the microphone DWN switch The scan step size depends upon the current step programming 5 Scan will stop whenever a signal Is received that 6 activates the BUSY indicator for a limited time reverse the direction by rotating the Tuning control 6 Press the PTT switch or any front panel key to stop counterclockwise or by pressing the microphone seam DWN 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 Scan will begin in an upward direction You can 26 5 5 5 Memory Channel Scan 1 Adjust the SQL control to the threshold point 2 Press and hold
32. e F key momentarily and then pressing the SHIFT AL key will cause the radio to activate the Priority Alert function When this function is active the radio will scan memory channel 1 at approxi mately a 5 second interval If there is activity on the frequency a beep will sound from the speaker Pressing the same key sequence again will cancel the function Pressing the F key for longer than 1 second and then pressing the SHIFT AL key will store the currently displayed data as the upper limit for the program mable VFO tuning limit function 6 TONE T ALT key TONE function Pressing this key by itself causes the radio to select the desired tone signaling mode When the indicator is illuminated in the display the transceiver will transmit the selected subaudible tone When the 55 indicator is illuminated the transceiver will both transmit the subaudible tone and will also remain squelched until the proper subaudible tone is received TONE frequency selection Pressing the F key for longer than 1 second and then pressing the TONE T ALT key will allow you to select the desired tone frequency To change to a different tone frequency rotate the tuning control or press the UP DWN switches on the microphone until the desired tone frequency appears in the display To return to the normal frequency display you can press any front panel key except the power Switch TONE ALERT function If you press the F key momentarily and th
33. e 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 fire electric _ shock personal injury or damage to the radio itself lt lt M A 5 OPERATION 5 1 1 CONTROL FUNCTIONS 22 POWER switch Press to turn the transceiver on or off Press the VFO MPV or MR M key and switching the power on will reset the VFO or MEMORY The microphone PF key can be programmed when the power is switched on Tuning control This control is used to select the desired transmitter receiver frequency MHz step memory
34. e opened 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 NOTE This function is not available in some areas The DTSS 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 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 _ amp 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 channel
35. ed When called with a group code that group code is displayed Paging operation procedure Set your station code Tune to frequency of the other station To stand by for a pager call the other station Set the code of station to be called Transmit Stand by 4 5 10 1 Paging Code Memories There are five 5 paging code memories Use Store your individual ID code in memory Automatically stores the calling station s code during reception Can temporarily set code for the station PO Stores group codes and local station codes in memory 5 10 2 Setting the Paging Codes 1 Press the DR DT key to enter the paging mode The P indicator will light 2 Press the F key then press the DR DT key while the F indicator is on The code setting mode will be entered and the memory channel indicator will flash 3 Set the desired memory to 3 or A with the tuning control or key 0 to 3 or A on the microphone op tion with DTMF 42 Press the DR DT key The first digit will flash Not necessary this operation if you use DTMF microphone Set the desired number with the tuning control and press the DR DT key or key O to 9 on the microphone with DTMF The first digit will be set and the second digit will flash Set the second and third digits with the tuning control and press the DR DT
36. en press the TONE T ALT key T ALT function will be activated This function will cause the radio to emit a series of beeps when an incoming signal is received See page 47 4 CTCSS 4 QU 8 888588 qgnesenesenuss6Al EE 4 2444 L 2 1 step D REV STEP key This key is used to reverse the transmit receive frequencies during repeater operation If you have selected simplex this key will not function Pressing the F key momentarily and then the REV STEP key will allow you to select the desired VFO tuning step and Scan step size Use the tuning control to select the desired tuning step and then press any front panel key except the POWER switch to return to the normal frequency display Pressing the F key for longer than 1 second and then pressing the REV STEP key will turn the BEEP function Off or ON amp DR DT ALT key ALT TM 541A 541E only DR DT function Pressing this key alone to select the DTSS Dual Tone Squelch System function or DRS Digital Recording System function ALT function Pressing the F key momentarily and then the DR DT ALT key will cause the ALT Automatic Lock Tuning function of the TM 541A 541E to activate Pressing the F key for longer than 1 second and then pressing the DT DR ALT key will turn the DRS function ON or OFF 5 1 2 D LOCK amp da o A LOCK Exi DTSS DRS APO ee UVER LOW MIO LCD Displa
37. ents 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 2 Press the VFO MPV key to select the VFO mode Rotate the tuning control or press the microphone UP DWN switches until the desired lower 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 Press the F key for longer than 1 second The F indicator should begin flashing 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 1 second 5 Now select the desired upper tuning limit using the MHz key and tuning control or microphone UP DWN switches With our example TM 241 we want the upper band limit to be in the 145 MHz band and therefore dial up 145 100 MHz 6 Press the F key for longer than 1 second The F indicator will again begin flashing 7 Press the SHIFT AL key within 10 seconds A long beep will sound and the F indicator will turn off in the display This indicates that the upper limit has been stored in memory 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
38. ialize reset the microprocessor using the following procedure 1 Turn the POWER switch off 2 Press and hold the MR M key and turn on the POWER switch 3 Release the MR M key VFO Initialization All the settings except the contents of the memory and call channels are initialized Turn the power switch off 2 Press and Hold the VFO MPV key then turn cic mev a cross the power switch on rnr c Fag 8 APO L No transmit receive OP rus amaaannaassSEN ILU eration occurs when this is done 3 Press the VFO MP V key again 5 4 4 Memory Channel This transceiver provides 20 Memory Channels 18 Memory Channels when DRU 1 installed In addition to serving as a normal Memory Channel some of the Memory Channels serve a dual purpose to specify other parameters The functions of those Memory Channels are described below Memory Channel 1 is used to store the frequency for the Priority Alert function Memory Channel 7 10 are used to store odd split repeater data Memory Channel 11 is used to store the lower limit for the Programmable Band Scan function Memory 12 is used to store the upper limit for the Programmable Band Scan function 21 9 4 5 Memory Contents 5 4 6 Memory Entry Each Memory channel is capable of storing the Simplex Normal shift following information YES Can be stored in memory 1 Press the VFO MPV key to NO Cannot be stored
39. ing memory lockout 1 Enter the code setting mode and display the number except memory and A to be locked out using the tuning control 2 Press the MR M key mark lights and the memory is locked out 3 To cancel repeat steps 1 and 2 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 maj o Note 1 When using the CTCSS function the incoming sig nal must be present for approximately 2 seconds in order for the Tone Alert function properly 2 When the DTSS function is the bell function __ works only when the DTSS code matches 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 1 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 15 on Press the key and then the TONE T ALT key The T ALT indicator will light 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
40. ing operation code selection mode is canceled 2 If no action is taken for longer than 10 seconds code selection mode is automatically canceled 32 5 8 3 Selection using memory channels 1 through 3 Storing VFO frequencies and DTSS codes at lt lt WN the same time Select the desired frequency to be stored in memory in the VFO mode Follow steps 1 through 8 above in the VFO mode Press the F key Select the desired memory channel 1 2 or 3 with the tuning control or the UP DWN key on the micro phone 5 Press the MR M key Rewriting DTSS codes in memory channels 1 to 3 Press the F key while the memory channel is operat ing 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 Store the selected code in memory Follow steps 1 through 8 in VFO mode to edit a stored code 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 PAGING OFF gt PAGING OFF jOTSS OFF PAGING ON P indicator lights RECEPTION 3 Squelch will open when the proper code is received TRANSMISSION 4 When the PTT switch is pressed the code shown in the figure is sent out f
41. ions just like the CALL key on the front of the radio we 1750 key European version The transceiver will transmit with 1750 Hz repeater access tone whenever this switch is depressed 5 VFO key This key functions just like the VFO key on the front of the radio 6 MR key This key functions just like the MR key on the front of the radio 7 PF Programmable Function key This key can be programmed to perform any of the following functions MHz key Initial setting from the factory or SHIFT key or TONE key or REV key or DR DT key or LOW key To program the key use the following procedure 1 Turn the POWER switch on the transceiver OFF 2 Press and hold the key on the front panel of the set that corresponds with the function you wish to program the microphone key to perform 3 Turn on the POWER switch while the key on the front panel is held in 4 Release the front panel key One additional function can be programmed that is not included on the front panel of the transceiver This is known as the MONITOR function This will al low you to open squelch to check the band for a clear frequency This will function even if you are operat ing in the CTCSS decode mode DTSS mode or PAG ING mode MONITOR programming Press and hold the F key on the front panel as you turn on the POWER switch of the transceiver and then release the F key 8 16 Tone DTMF keypad U S A and CANADA version only These butt
42. ired 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 indi cator 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 Press the key for longer than 1 second 2 Rotate the tuning Tone Frequency Hz control or press the 67 0 1072 167 9 microphone UP DWN ALS 110 9 173 8 switches to select the 744 1148 179 9 77 0 118 8 i tone 79 7 123 0 Me S25 d273 2035 3 Press any front panel 85 4 131 8 key to return to the 88 5 136 5 218 1 normal frequency 915 1413 2257 display 146 2 233 6 156 7 250 3 103 5 1622 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 re peater to see if they offe
43. key If after 10 seconds no key has been pressed or a key other than DR DT or MR M is pressed the code will be set 5 10 3 Paging Transmission Calling For example the following groups communicate Your individual ID code is preset in memory A Your with each other individual ID code ts always stored in memory A Predetermined frequency 145 660MHz 1 Tune to the predetermined frequency TOUN A 2 Press the DR DT key to light the P indicator Station 1 s individual code 222 Station 2 s individual code 2393 Station 3 s individual code 444 indicates Group code 789 the paging Your memory 111 3 Press the F key then press the DR DT key while the F indicator is flashing 444 l 789 Station 1 memory P f NN T AL ETEF e e Jj bb SE oco 4 Select the memory number in which the local station Station 2 memory code 15 stored using the tuning control 333 Turn the paging function of the other transceiver P3 789 43 Calling all station in the group 1 To all station in the group select the memory number in which the group code is stored In this example the number ts stored in number P3 2 Press the PTT key once or press a key other than DR DT or MR M to display the frequency again 3 Press the PTT switch 145 660M Hz 189 111 45558 P3 NEL
44. l provide the best audio quality but the shortest recording time Tone quality set tings 2 and 3 provide longer recording times but with an associated decrease in tone quality Tone quality indicator 9 9 3 Selecting the maximum number of P Phrases 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 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 MAX number of phrases AN 4 fi o 9 2474 a T aL JA EN o 4 Ss Relationship between the maximum num ber of phrases sound quality level and re cording playback time lf the maximum number of phrases is set to 8 and the sound quality level is set to 1 standard the record ing time for one phrase will be 4 seconds Since the phrase number goes from 1 to 8 eight different re cordings 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 be come 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 maxi mum number of phrases and the sound quality level as required The recording playback time for each phrase cannot be se
45. on has been activated 0 F Display the selected transmitter off set direction Both and light at the same time during split channel operation 4 2288885 Displays the operating frequency to the nearest kHz digit or the tone l frequency etc The indicator flashes when scan ning 5 1 3 Rear Panel D ANTENNA connector Aitach an antenna with a impedance of 50 ohms 2 13 8 VDC power input connector Connect the supplied DC power cable to this connector Pay close attention to the polarity Red is positive and black is negative 3 Fuse holder Contains a requaired fuse 241 15A TM 441A 10A 541 Do not use a larger fuse as damage might result to the transceiver 2 External speaker jack This jack is used to connect an external speaker The speaker should have an impedance of 8 ohms low SWR and an 5 1 4 Microphone A o 8 m 5 2 0 f i 5 52900 i 5985 KENSOOD dm Oo Xem B ie sett European version version QAUP DOWN switches These switches can be used to increase or decrease the VFO frequency the Memory channel number and the Tone frequency etc 3 PTT Push to Talk switch The transceiver will transmit whenever this switch is depressed Scan operations may be canceled by press ing this switch without transmitting 4 CALL key except European version This key funct
46. onds of selecting the transmit frequency A long beep will sound to signal the data has been success fully stored 3 Press the F key The F indi cator and a memory chan nel indicator will light For example CH 5 ae 45622 EE 4 Select any Memory Chan nel from 7 thru 10 using the Tuning control or the microphone UP DWN switches 8 To confirm the contents of the Split Memory Channel press the MR M key and re call the channel The re For example CH 10 ceiving frequency and indicator will appear in the display 5 Press the MR M key within 10 seconds of selecting the Memory Channel 9 To check the transmit fre A long beep will sound quency press the REV STEP and the F indicator and the key or Microphone PTT Memory Channel number switch The transmitting will turn OFF frequency will appear in the display 6 Within 10 seconds of press ing the MR M key you should select the desired 23 CALL Channel 1 Press the VFO MP V key to select the VFO mode 2 Select the desired operat ing frequency offset tone frequency etc For exam ple 145 500MHz 3 Press the F key The F indi cator and the memory channel indicator X will light For example CH 8 4 Press the CALL key within 10 seconds of pressing the F key The F indicator and the Memory Channel num ber will turn OFF to con firm data entry 5 4 7 Memory Channel Recall 1 Press the MR M key
47. ons are used to activate the DTMF encod er 9 LOCK key This key will deactivate all functions of the micro phone 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 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 peleas ominas on the display TM 241A 241E U S A version TM 541A 541E Receptoin nnnn IYUL L L c a a s avra M TM441A TM 441E fo 22 nnnn i 43U L Li Li i vee Fig 1 Note The frequencies shown above are the default frequencies after a microprocessor reset If the Rotate the VOL control clockwise until a signal or noise is heard coming from the speaker Rotate the tuning control or press the microphone UP DWN switches to select an open channel Then rota
48. or about 0 5 second PTT ON PTT OFF Y Y 41 94 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 The DTSS signal ts 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 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 1000 ms 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 Using DTSS with a repeater 4 3 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 ter minated 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 maxi mum of 8 different voice messages for later playback The automatic recording f
49. r alignment without factory authorization can void the transceiver s warranty When operated properly the transceiver will provide many years of service without requiring realignment The in formation in this section gives some general service procedures which can be accomplished without sophisticated test equipment i ul 7 2 SERVICE if it ever become necessary to return the equipment to your dealer or service center for repair pack it in its original box and packing and include a full description of the problems involved Please include your daytime telephone number You need not return accessory items unless directly related to the service problem Service note Dear OM if you desire to correspond on a technical or operational problem please make your note short complete and to the point and PLEASE make it readable Please list Model and serial number The problem you are having Please give sufficient detail for diagnosis Provide information such as other equipment in the station meter readings and anything else you feel might be useful in attempting diagnosis Caution Do not pack the equipment in crushed newspapers for shipment Extensive damage may result during shipment Notes 1 Record the date of purchase serial number and dealer from whom purchased 2 For your own information retain a written record of any maintenance performed on the unit 3 When claiming warranty service please include photocopy of the bill
50. r autopatch services To activate the keypad 1 Press and hold the PTT key 2 Press the keys just like you would dia your telephone at home 3 The transceiver will remain keyed for approximately 2 seconds after you press each number so you can re lease the PTT switch without unkeying the transceiv er Note Some repeaters will require the use of a special key sequence to activate the Autopatch function You should check with your control operator for this sequence 30 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 Oper ated 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 E l Note Even if the TSU 6 is not installed tone signals can be transmitted so the tone squelch of the other trans ceiver can b
51. requency 3 To release the ALT function press the F key momentarily and then the DR DT ALT key 19 9 3 TRANSMITTER OPERATION Caution 1 Ensure that an antenna with low 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 Check the frequency to see if it is occupied before you transmit Press the PTT switch The ON AIR indicator will light and the RF meter will deflect to the right If you have selected the LOW power position the low indicator will appear in the display and the RF meter will only deflect slightly When power has been selected the RF meter will deflect full scale Speak into the microphone The recommended distance to the microphone is 5 cm 2 inches 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 HOM ad to select the desired transmit output i550 ee lt lt lt Oe LO 20 Note The use of LOW power is recommended 5 3 2 Time out Timer TOT can limit the continuous transmission time to 30 minute
52. ruction manual The user could lose the authority to operate this equipment if an unauthorized change or modification is made CONTENTS 1 gr de BEFORE OPERATION sac ts 4 SPECIFICATIONS NE RS 6 ACCESSORIES istbeses 7 INSTALLATION INSTRUCTIONS 7 OPERATION CONTROL 5 10 RECEIVER OPERATION Reception 16 Frequency Selection 17 Frequency Step Selection 17 Programmable VFO Tuning Limits 18 541 19 TRANSMITTER OPERATION 20 Time out Timer TOT 20 MEMORY Microprocessor Memory back up 21 Initial State acc VR En ES qa utat ud 21 Microprocessor Initialization 21 Memory Channel 21 Memory Contents coss EXER 22 Memory Entry eei di ovs 22 Memory Channel Recall 24 Memory Sit ou ier E s 24 SCAN Scan Operation ues Sa 25 6 7 Hold Resume Programming 25 Band Scam oos terza daten 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
53. s 1 Press the F key for longer than 1 second then press the LOW DIM key The T indicator will light To cancel the setting tepgan the PAO Press the key for longer than 1 second 2 When the time out timer reaches the transmission time limit a beep will sound and the transceiver will return to the receive mode To transmit again release the PTT switch and press it again 5 4 MEMORY 0 4 1 Microprocessor Memory Back up This transceiver contains a lithium battery to retain memory Turning off the POWER switch disconnecting the power cable or a power failure will not erase the memory The battery should last for approximately five years When the battery discharges an erroneous display may appear in the display Lithium battery replacement should be performed by an authorized KENWOOD service facility either your authorized KENWOOD dealer or authorized service cen ter 5 4 2 Initial State Initial state of the microprocessor from the factory is shown in the chart below 241 TM 441A E 440 000 TM 541A E VFO Memory channel 144000 420000 2200080 MHz MHz MHz channel frequency VFO step 25kHz Memory channel 5 12 5kHz 25kHz 1CH Tone frequency 5 4 3 Microprocessor Initialization Memory channel Initialization When you want to erase all programed data or if the display shows erroneous information you should init
54. s 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 OOO pTss TAP L LLLI SERE 1 3 7 OER 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 9 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 Selecting and storing a code with the DTMF Then enter a three digit number on the key pad KEY PAD MC 44DM Press the DR DT key to light the DTSS indicator 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 Notes RN 1 a key other than the DR DT key on the front pannel is pressed dur
55. t Sound quality level 3 12 Number of 1 Maximum phrase second phrase 35 5 9 4 Recording 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 Press the F key for longer than a second then press the DR DT key while the F indicator is flashing to en ter the DRS setting mode The DRS indicator should turn on in the display Select the desired phrase number by rotating the tuning control Press the VFO MPV key to begin recording The recording time indicator will show the elapsed time of the recording Elapsed time Recording will stop when the time indicator reaches 00 continue recording from the same frequency rotate the tuning control to the next phrase number and then press the VFO MP V key again to begin recording Recording will stop when any front panel key is pressed 36 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 Press the MR M key to start recording from the microphone The recording time indicator will indicate the elapsed time of the recording you wish to
56. te the SOL 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 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 display shows incomplete data or you think the displayed frequency is in error you should reset the Microprocessor Memory Initialization on page 21 5 2 2 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 T VFO mode Frequency Selection MR key VFO key VFO key CALL key M CALL key MEMORY channel mode 4 channel mode us MR key VFO Mode Operation Frequency Selection 1 Press the VFO MPV key to select the VFO mode Rotate the tuning control or press the microphone UP DWN switches to select the desired frequency Memory Channel Selection Press the MR M key Rotate the tuning control or press the microphone UP DWN switches to select the desired memory channel CALL Channel Selection Press the CAL
57. unction 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 opera tion will change the modes as follows 4 Normal Mode DRS selection control mode 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 34 d DTMF control mode 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 MAX Number Phrase of phrases number eu DRS amp 4 Elapsed time Tone quality level 5 9 2 Tone Quality Level Selection l 2 DRS indicator lights in the display Press the TONE T ALT key Each time you press the TONE T ALT key the tone quality indicator will ad vance i e from 1 to 2 to 3 and the back to 1 etc Tone quality 1 wil
58. ve the 2 screws 5 curing the Top cover Carefully remove the top cover Fig Attach the three cables from the DRU 1 in the transceiver as shown in Fig 3 Don t forget to at tach the TSU 6 as shown if you are installing this unit at the same time Fig 4 Tighten the screws ig 4 teplace the cover and tig ten the screws 10 complete the installa tion DTMF unit DTU 2 1 Remove the 2 screws securing the Top cover 2 Carefully remove the top cover Fig 1 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 Not use this connector Fig 3 55 KENWOOD
59. y Panel DECLA a 439 v amp On when the Lock function has been activated On when the amp Lock function has been activated On when the Automatic Lock Tun ing function is active When the ALT system is operating the direction in dicator will turn on if the system shifts the receiver frequency On when the DTSS function has been activated On when the Digital Recording Sys tem is active On when the Automatic Power Off function has been activated On when the squelch opens This level meter indicates the rela tive 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 func tion has been activated On during transmit 13 5 t A ty ws Indicates the active memory channel number indicates that the chan nel is locked out C is displayed during cal channel Either 1 P2 P3 or PA is dis played during paging On whenever the F key has been de pressed Also shows the last memory channel number that had been se B lected 5 S On when the Tone Alert function is active The indicator flashes when signal has been received 42 CTCSS On when the Tone Decode and En code function has been activated On when the Tone Encode function has been activated 2F 19 AL On when the Priority Alert function has been activated 15 REV On when the Reverse functi
60. y will not change when the tuning 1 The lock is on 1 Eee e M Es within ten seconds of pressing the F key control is rotated or a key is pressed 2 A LOCK is on 2 Hold down the MHz LOCK key switch the power on then perform the opera tionin 1 51 8 OPTIONAL ACCESSORIES MC 44 MC 44E E European Version B MC 44DM MC 44DME MC 85 MICROPHONE 8 pin MULTI FUNCTION MICROPHONE E European Version The MC 85 is a unidirectional high class MULTI FUNCTION MICROPHONE electret condenser microphone provided with WITH AUTOPATCH an output selector switch audio level compensation circuit low cut filter level meter PTT and LOCK switches MC 60A MICROPHONE 8 pin MC 80 MICROPHONE 8 pin PS 33 The zinc die cast base provides high stability The MC 80 is an omnidirectional electret REGULATED DC POWER SUPPLY The MC 60A is complete with PTT and condenser microphone that is provided with LOCK switches UP DOWN switches UP DOWN switches volume adjustment for impedance selector switch and a built in pre output level PTT and LOCK switches and a amplifier built in pre amplifier Using MC 60A with the transceiver does not comply with the 11 European T ARD standard SP 41 MOBILE SPEAKER SP 50B MOBILE SPEAKER 8 ohms B DTU 2 Compact and smart high quality external speaker DTMF UNIT 4 ohms provides flexibility of installation for maximum convenience
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