Msg Nr. : 157571 Da : IW3GRW Per : TMP Tipo/status : PN Data/ora : 0225/0016 Dimensione :11843 Bid (Mid) : 2029-IW3GRW Titolo : Aclune modifiche per il TM742 **** **** ********************************************************************* **** Subject: TM-742/942 Remote Control Yes, it can be controlled remotely. Here's what Kenwood sent me after I called up and asked. What they don't make clear is that when the unit is in *microphone* remote control mode, any tones heard through the mic will also control the radio, including what comes through the speaker! That mode allows you to do more than the limited "official" DTMF remote control--things like adjusting the squelch, for instance. Also, note that once you've given the access code, there is no access control other than PL tones, until you turn off remote control by sending A#. This also means that you need to be very careful with the mic when it's controlling the radio, because I've found that it's very liberal about what it interprets as a DTMF tone, including such things as white noise, road noise, and the clunks and bangs of hanging up the mic. The remote mode described below is essentially identical to that for the 732A. A setup that I've found works very nicely is to run crossband repeat between 220 and 2 meter, and control through 440 simplex. Lets me use my HT on 220, with no control signals on the talk channel. Cool! 73, -Randy, KD6ULI --------------------------------------------------------------------------- TM-942A, TM-742A REMOTE CONTROL BY EXTERNAL DTMF SIGNAL, Instruction Manual Addendum This transceiver can be remote-controlled by any other transceiver which can transmit DTMF tones. This instruction is similar to Remote Control by DTMF Microphone, page 61 FUNCTION SELECTION 1. Select a common band for the TM-742A/942A and the remote control transceiver, and enter the same frequency on both transceivers. Enter a 3 digit DTSS code (xxx) on the TM-742A/942A (Refer to Note 2.) The DTSS icon must be displayed. (See DTSS code selection, pages 72 through 75.) 2. Press the Band Sel key (push the volume control) to select the band to be controlled. DTSS should be turned off on this band. Repeater Mode: If you intend to operate the transceiver in the Repeater mode, review Instruction Manual pages 59 & 60, Operation as a Repeater, for an explanation of Fixed Band and Cross Band Repeater modes. This is not a 100% duty cycle transmitter. Before selecting the Remote Control mode, set the transmitter output power to Low or Medium, and set the Time-Out-Timer (page 32) at three (3) minutes. 3. Press the RC key on the transceiver. The RC and DTSS icons will flash. OPERATION 1. Be sure the frequency for the remote transceiver is the same as the TM-742A/942A, and that the remote transceiver's DTSS (if so equipped) is off. 2. Control mode initialize. Place the remote transceiver in transmit, and send "A" (fourth column key, not alphabet) followed by the correct 3 digit DTSS code (xxx), then "#". Each key press and space must be less than 1 second each. Using DTMF memory will be the most convenient method to send this control string. (Two or three attempts may be required.) 3. On the transceiver under remote control, the DTSS icon will display steadily, and the RC icon will continue to flash. The transceiver is now ready to accept external DTMF Remote Control. FUNCTIONS WHICH CAN BE CONTROLLED BY THE REMOTE TRANSCEIVER Function DTMF keys (Notes) CALL CH. mode ON 7 CALL CH. mode OFF 8 (Return to VFO mode) Control mode initialize A, xxx, # Control mode exit A, # CTCSS ON 3 CTCSS OFF 6 Frequency entry A, 0-9 (In VFO mode. Use numeric keys) MR mode ON 9 MR mode ch no. select A, xx (In MR mode. Use numeric keys) MR mode OFF 8 (Return to VFO mode) T.ALT ON 1 T.ALT OFF 4 Tone Freq. Sel B, A, xx (xx=2 digit tone ch. no 0138) Tone ON 2 Tone OFF 5 TX power (H=no letter, M, L) 0 UP (freq, tone or MCH) # Down (freq, tone or MCH) * VFO mode 8 X-Band Repeat ON C, A, # (& then exit Control mode) X-Band Repeat OFF A, xxx, #, D (Restart Control mode initialize) Notes 1. To set the memory channels or tone frequency channels, select the mode, then input the channel number using the numeric keys. For the tone freq. channel numbers, please see page 70. (The UP or DOWN buttons may also be used to increment or decrement channels or VFO frequency, but no acknowledge or feedback is provided.) 2. It is presently not legal to transmit control codes below 222MHz. Since it is illegal to transmit control tones (DTMF) on the 2m band, you must enter a 3 digit DTSS code (xxx) on the 440MHz band. The DTSS icon must be displayed on the 440MHz band. 3. The microphone, and the mic element, are always on, including in the RC mode. DTMF tones from the transceiver's speaker, or from a telephone with speaker, may "take control" of the radio, just as pressing a DTMF button on the microphone. It is not advisable to leave the radio unattended in the RC mode. 4. There is one function which is not supported and cannot be recovered by the remote transceiver: RC cancel, go to the Intercom mode. Press A, B. This is one-way & must be reset with transceiver RC button! -- Internet: gobbel@ucsd.edu ---------------------------- Hi! I am a .signature virus. Copy me into your .signature to join in! Copied from the QRZ! Windows Ham Radio CDROM **** **** ********************************************************************* ############################################################################### From : F5TFS To : KENWOO@EU Type/status : BF Date/time : 03-Jan 06:52 BID (MID) : 51317_F6KKU Message # : 4236 Title : *TM-742E MODIFICATIONS* Path: !PI8MID!ON4AWP!ON7RC!ON1KGX!ON1KPU!ON4TOR!ON4KTK!F6KKU! From: F5TFS@F6KKU.FNPP.FRA.EU To : KENWOO@EU Hello and thanks for reading this message. Here is some possible modifications for the TM-742E Kenwood transceiver. I have make this modifications myself and they are working well. But if you want to make some modifications on your own transceiver, remember that it is at your own risk ! Before open your TM-742E, be sure you have disconnect the power. Don't do this modifications if you hare not sure or if you have not the necessary knowledge in eletronics to do this ! 1. Open the lower panel (see your User Manual for details) You will have something who looks like that : _ _ _ _ I I I I I I I I <== Vol. & Squelch Boutton ------------------------------------------ I Here I I I_________I Control Unit I I X53-346X-XX A/2 I ------------------------------------------ 2. You can find a range of CMS chip resistors who looks like that : 0 1 _______________________________ # # #-# Bit 0 #-# # # Bit 1 # # mean no CMS Chip resistor # # #-# Bit 2 #-# mean CMS Chip resistor #-# # # Bit 3 #-# # # Bit 4 # # #-# Fan Delay Bit 0 # # #-# Fan Delay Bit 1 # # # # Repeater Bit 3. With bit 0 set to 1 bit 1 set to 0 bit 2 set to 1 bit 3 set to 0 bit 4 set to 0 * You have the extended frequency on VHF from 118 to 174 MHz You have the extended frequency on UHF from 410 to 470 MHz You have the extended frequency on UHF from 800 to 1000MHz On 144MHz, if you press MHZ Key more than 1 second, mode change AM<=>FM On 430MHz, if you press MHZ Key more than 1 second, band change 430<=>870 Note that from 118 to 136MHz, the mode change automaticaly from FM to AM and you can see a "A" which replace the One hundred MHz (ex : A18.125MHz) * You have the repeater possibility (for more detail, see page 59 of your Kenwood Instruction Manual) In fact, your TM-742E now as mostly the same functions that the TM-742A which is for the US market. 4. Fan Delay time setting : The fan can be controlled by setting the chip resistor (R66 & R65, 47kHom) for fan delay bits 1 and 0 as follows : ----------------------------------------------------------------------- FAN CONTROL | Fan Delay bit 1 | Fan Delay bit 0 | ----------------------------------------------------------------------- On when power is On | 0 | 0 | ----------------------------------------------------------------------- On during transmission | 0 | 1 | ----------------------------------------------------------------------- On during transmission and | | | for 1 minute after trans. end | 1 | 0 | ----------------------------------------------------------------------- On during transmission and | | | for 2 minuntes after trans end| 1 | 1 | ----------------------------------------------------------------------- 5. WIRELESS REMOTE CONTROL WITH DTMF HANDHELD TRANSCEIVER * When you use the MC-45DME microphone, you can of course have the remote function which is explain in the Instruction Manual on page 61 "Remote Control by DTMF Microphone". When you put the TM-742E in Remote Control mode by pressing more than 1 second the "F" key then the "RC" key, you can control some of the function with a Handheld DTMF like the TH-28E or TH-22... It is not writen in the Kenwood Instruction Manual how to use it. So I had some difficulty to find some of the possible remote functions. If you find more of them, I will be happy if you told me about them. 6. CHANGE YOUR TM-742E TO A TM-942E (who don't exist on the market) * If you want to put the 1200MHz band unit, you simply reffer to your Kenwood Instruction Manual and you have a display who looks like that : ________________________________ | 1296.000 | 144.550 | 432.800 | -------------------------------- |= 0 ######## . 0 0 0 | -------------------------------- This is not really convenient as the logique would be to have the 1200MHz display at the far right of the Transceiver. So if you want to have something who looks like the TM-942A but with a TM-742E + 1200MHz band unit, just change the 144 and 430MHz band unit lower (reffer to the Kenwood Instruction Manual page 94 and after, just like if you install an optional unit), then you will have this : -------------------------------- | 144.550 | 432.800 | 1296.000 | -------------------------------- |= 0 ######## . 0 0 0 | -------------------------------- You can also change in anyway all of the band unit to have the 430MHz on the left, 144MHz on the right...etc... just imagine what you want to have. 7. FINAL I hope that you will have more fun with those "new" functions. I am sure that there is more "hidden functions" who are not write in the Instruction Manual. If you know some of them, please let me know. 73, Boris, F5TFS@F6KKU.FNPP.FRA.EU =========================================================================== ****