Icom 7610 N1MM One Cable RTTY FSK CW – How To



I'm an Amateur Radio enthusiast. I love the hobby and experimenting with radios, antennas and software. On my YouTube channel I upload videos on the Icom 7300 and Icom 7610 along with Ham radio software programs. I hope to inspire people to try new things in Amateur Radio.

37 Responses

  1. blank Bill Leger says:

    Hi Richard and the group

    Am I reading this correctly, that I no longer need any type of interface???
    Right now I use a home brew level converter that’s worked perfectly with my Icom IC-7600.
    The 4 programs I use are N1MM, DX Labs including winwabbler and WSJT-X along with JTAlert

    I do want to use true FSK

    • blank K0PIR says:

      Hi Bill,

      That’s correct, no external interface, just a USB cable and the drivers. Download and install the USB driver from Icom before connecting the USB cable. Have a look at the videos.

      It works FB and you’ll love it.

      Rich, K0PIR

      • blank Bill says:

        Hi Rich

        OK on N1MM, I do have rig control, radio receives rtty ok, radio does go to transmit when a macro is pushed but no dittles. any ideas with that

        With DX Labs commander, nothing, no rig control at all

        Would you be available for a team viewer session???/

  2. blank Bill Leger says:

    Hi Rich

    More progress made today, in N1MM I do have dittles and it does key the radio, I have no power out on the radio, Am I missing a setting

    On DX Labs I do have rig control but no power out on RTTY also.

    What am I missing here????

    Thank you in advance for your help

    • blank K0PIR says:

      Hi Bill,

      That’s great! Sounds like you are on the right track.

      Do you have the radio in RTTY mode? I put my radio in RTTY mode, turn the power to 100%, push the transmit button and I get 100% output. When I transmit with MMTTY (N1MMM) same thing, 100% output.

      Does that work?

      Rich, K0PIR

  3. blank Bill Leger says:

    Yes radio is in RTTY mode
    with power at 100% I have no power output
    The scope shows that it is transmitting
    Power meter =0
    SWR meter =0

    • blank K0PIR says:

      I am unable to create that problem. I would go back and have a look at the settings in the radio under connectors again. Maybe something is amiss.

      However, I did manage to mess up my CW keying LOL

      I’ll post anything I find out Bill.

      Rich, K0PIR

    • blank K0PIR says:

      My problem was in N1MM Logger Plus Config. Bill, go back and look at that part again in the video. After configuring it just like the video, I am back to 100% RTTY FSK and CW.

  4. blank Bill Leger says:

    Good Morning Rich

    All working, Factory default on ALC was 5% way to low

    Thanks for your help and video’s

  5. blank Alex Vasileiou says:

    Hi Rich,
    Just opened my new IC-7610 and watched all your videos.
    I am experienced for 2 years with IC-7300.
    In your video you say:
    “As a prerequisite, always install the Icom 7610 USB driver before connecting the USB cable”
    I cannot find nowhere this f… driver
    When I connected the USB cable, my device manager reports COM6 & COM7 (in your video is 4 & 5).
    Do I need a driver?
    The MMTTY does not make TX on the transceiver.
    The whole setup is OK.
    Please for any kind of answer…Thanks Alex SV2BXA

    • blank K0PIR says:

      Hi Alex,

      Great to hear form you and congrats!

      If it’s working and the COM ports are working, I don’t guess you need too. It probably wouldn’t hurt though if you start having problems.Here it is, look for the USB driver 1.2 https://www.icom.co.jp/world/support/download/firm/

      If it’s not transmitting FSK and you have EXTFSK installed, does EXTFSK show any transmission in it’s window? Is it keying the rig? If it’s not, I would install that driver and have a look at the settings again. It’s probably a setting that is off.

      Rich, K0PIR

  6. blank John says:

    Does the 7610 provide on screen decoding of CW?

    • blank K0PIR says:

      Hi John,

      Nice to hear from you and great question.

      Short answer, no.

      I wish it did. I am using CW Get with WinWarbler in the DXLab Suite. Although I haven’t tested it much, it appears to work very good.

      I used HRD and DM780. DM780 was pretty good at decoding. Fldigi is also a favorite and I’ve found it works very good with N1MM Logger+.

      Rich, K0PIR

  7. blank Craig Anderson says:

    I used your video to setup my new 7610 and N1MM but now the 7610 goes into Transmit mode after about 5 seconds after power up and no matter what I have tried I can’t get it to stop other than powering get down. It was something in the setup because it worked fine before I started making the changes you suggested in the 7610 to use with N1MM. I really don’t want to do a factory reset to lose all of my settings on the 7610 but I may have to. It is now unusable. Help!

    April 6th 2154 UTC


    • blank K0PIR says:

      Hi Craig,

      Nice to hear from you and no problem. It is probably just an RTS setting in the software. That is most common. I would look at the software first and there must be something set in RTS that shouldn’t be. In N1MM Config my RTS is set to PTT. If you can’t find the problem, go to the radio and Menu>Set>Connectors>USB SEND/Keying. Mine is USB SEND = USB1 (A) RTS. If that is not working for you try to turn it OFF. But, if everything in the software is as I have it, it will work.

      Sometimes it’s just a setting that is overlooked.

      I believe that will do it for you. Please let me know and thank you so much for commenting. It will help others as well.

      Rich, K0PIR

  8. blank ROY says:

    My version of mmtty does not have EXTFSK64 only EXTFSK. I assume that EXTFSK will work ok or do I have to download the EXTFSK64.

  9. blank ROY says:

    YES and tnx for the help.

  10. blank Brad says:


    I gave up Win4IcomSuite. It’s radio control screen is much better than HRD but I would rather use the radio itself. Much more fun. I see what you mean. Win4IcomSuite ties up the first com port (A) for rig control when you can use a Ci-V cable with HRD. Win4Icom does not support CI-V.

    Followed all your steps screen by screen, field by field and have N1NM working with MMTTY now. I was never able to get it to work with my Yaesu FTDX 5000.

    Thanks a bunch. I really appreciate the videos.

    So what are we going to do with that second blue USB port on the back of the rig?


    • blank K0PIR says:

      That’s great Brad. Thanks for commenting. I have been doing a little RTTY lately, so maybe I’ll see you on the air.

      I still haven’t tried DM780 and RTTY FSK since the new HRD update. I was using WinWarbler this past week. I’ll have to try out DM780 and RTTY FSK.

      Thanks for commenting and best wishes to you and yours.

      Rich, K0PIR

  11. blank Brad says:

    I tried DM780 FSK, it modulates a RTTY signal but it sounds funny. Not sure if I should run reverse or not. Have not made any contacts but it is early afternoon Sunday and the bands are quiet.

    I once say a video that said the waterfall has to be set at 2120 or something close to work????

    CW did work.

    • blank K0PIR says:

      Yes, exactly, I was having the same problem. When it sounds like that, others will not be able to decode.

      I was told by HRD to enable the “Reverse” button at the top toolbar, that way I can decode, but I was not able to make a successful TX.

      It was working for me at one time, but that was a few versions back.

      I want to look at it some more.

      Rich, K0PIR

  12. blank Brad says:

    I made a DM780 RTTY FSX qso. The waterfall has to be set at 2210 and it stays there. You tune using the VFO, not via the waterfall because the 2210 waterfall setting will change. Yes, “Reverse” on because all of HRD’s apps are USB upper and RTTY is lower.


  13. blank Brad says:


    I thought I posted this comment already so my apologies if it shows twice. I was able to male a RTTY FSK QSO using DM780. The trick is setting the water fall to 2210 and tuning with the VFO. Yes, the reverse button needs to be on because all DM780 programs are written for USB.



    • blank K0PIR says:

      Thanks Brad, glad to hear it. That’s the thing with DM780, the waterfall and then tuning with the radio.

      Did you get it to sound right when you made the contact or did it still sound a little odd?

      Rich, K0PIR

  14. blank Brad says:

    Yes, it sounded good to me, especially after I made a contact.

    Do other programs like Fldigi allow clicking on a waterfall or do you tune the VFO like DM780?


  15. blank Brad says:

    I setup MMTTY to work standalone. I found that I had to change the USB Send menu such that USB-1 B is set to RTS to get MMTTY to modulate. Your video had it set to USB-1 A to RTS.

    I don’t understand how you got N1NM and MMTTY to modulate because extfsk64 offers settings for just one com port. In my case port 7. I think it is 5 for you.


    • blank K0PIR says:

      Hi Brad,

      On mine I am using USB1(B) DTR. That’s what is keying the EXTFSK64 (COM5).

      I think you can ignore the USB1(A) RTS in the radio setup. That is my COM4 and I use it for rig control.

      Rich, K0PIR

  16. blank Lee Watts says:

    Looking for help re PSK31. Screen presentation in one big lump. Using Digipan. Used it before thru a rigblaster with no problems. 7610 is not treating me very well.

    • blank K0PIR says:

      Hi Lee,

      Nice to hear from you and thank you for commenting here.

      It’s probably just a setting or two in the receiver. Did you setup the receiver for digital modes?

      Have a look at this article and video on receiver settings with the 7300. It is very similar to the 7610.

      See if that helps. You’ll love the 7610 for digital modes. It is very quiet.

      Best 73,
      Rich, K0PIR

  17. blank Claudio says:

    I’m looking for how to use my Icom 7610 with CW Skimmer directly, connecting USB cable 2.0 back radio and running cwskimmer on the pc, without using HDSDR.I tryied it but it decodifies bad cw received.Is there any option to set ?
    Thank you .
    Claudio IK0QKN

    • blank K0PIR says:

      Hi Claudio,

      Nice to hear from you and thank you for commenting here. I haven’t tried that and I do not know of any other settings. I would try HDSDR and see if it works properly and go from there.

      Thank you again and best 73!

      Rich, K0PIR

  18. blank Lester Grandon says:

    enjoy ur vids and webstuff. we also have 7300 es 7610. like then both.

    i just plugged in a wireless kb and mouse into the 7610. everything works fb, the cw macros send using f1 thru f8 on kb. however i wud like to use the kb for sending cw without an external program. u knowlike a cw kb.
    have no need of a cw decoder but wud enjoy using kb cw. tu les k5lg

  19. blank K0PIR says:

    Hi Lester,
    Nice to hear from you and thank you for commenting here.

    I don’t see that option is available in the 7610 using CW. You can use the keyboard to type in messages and send them in RTTY and PSK. Looks like you can only use the keyboard to edit the CW memories.

    I suppose you could leave a CW memory blank for editing and then send it. Just keep rewriting over the CW memory. It’s not the same I know.

    I use the keyboard in N1MM Logger to send CW. I have used it in my other logging programs too.

    If you find a suitable workaround I’d be interested to know about it.

    Thank you again. Best 73!
    Rich, K0PIR

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