Digital Master 780 DM780 CW Decode


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.

15 Responses

  1. John, G3UCQ says:

    Keep the excellent videos coming. The one on customising DM780 was really useful to me.

    Question. Using my IC-7610 with DM780 and RTTY FSK, do you set the IC-7610 mode to USB-D or RTTY?
    I have to use USB-D otherwise I get a continuous tone with DM780 in FSK mode. Do you see the same?
    So I cannot use the RTTY TPF.
    Thanks and 73
    John, G3UCQ

    • Larry Aycock says:


      Was there ever response to this problem? I am experiencing the same problem. I followed all the setup steps and when I first transmit RTTY with the radio on RTTY mode, using DM780, I get a continuous tone for a long time, then it will start to send the RTTY signal. After that, if I continue to send, it will send right away, but if I stop for a while, the next time I send something, I get the long tone again.

      Hope to see a response soon. I’m desperately trying to figure this out.

      Larry, N6LKA

      • K0PIR says:

        Hi Larry,

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

        With the latest version of HRD and DM780 I was not able to get RTTY (FSK) to work properly. It would send, but there was something wrong with it. No one else could decipher the signal. I tried to decipher with a second radio, but still nothing.

        The problem you describe is something that many others experienced too. There is either a long delay or it sends a tone and then eventually works for a period of time. If you have HRD support I would contact them about this.

        For RTTY (FSK), the program I use is MMTTY. It works in N1MM Logger+ and also WinWarbler.

        RTTY (AFSK) works fine in DM780.

        Thank you so much again for commenting. Sorry I could not be of more help.

        Rich, K0PIR

  2. Scott K5CBC says:

    Hi Rich, some good info here as usual. I downloaded CwGet and it installed just fine but in your next video it would be helpful to do a short segment on setting up CwGet! There are a lot of options for soundcard setup and levels etc. that you have already tested.

    • K0PIR says:

      Hi Scott,

      Nice to hear from you and thank you for commenting here.
      I haven’t used CwGet indepth and that’s a good idea. There is more to the program than what was seen in this clip.
      To get it going just as I had it, all is needed is to set the soundcard setting in it. You’ll see the options I was using on the main window of CwGet. GTM, AFC and Auto Threshold. Everything else I believe was default with the program. See if that will work for you.
      Thanks for the idea and I will. It has some interesting features.
      Best 73,
      Rich, K0PIR

  3. Peter says:

    My problem is not being able to even download hrs/dm780 on 7610… free version not available…when try to download the current version and click on the trial “button” absolutely nothing happens, I used the free version very often until pic crashed and I lost everything. I miss it.

    • K0PIR says:

      Hi Peter,

      Nice to hear from you and thank you for commenting here. I understand they moved the free version, but it should be still available somewhere on the net.

      If you want to try the latest version they have , you can go here. Click the download button. It says the full and trial version is the same download.

      I hope this helps. I like HRD, just wish it was free like years back, hi hi.

      Off topic a little, I still use DXLab Suite. It’s a little more difficult to understand, setup and get working (IMO), but it works great. It’s free too. When I strted with DXLab Suite I just took one module (program) at a time, so I could get used to it.

      That download link will work for you, thanks again and best 73!

      Rich, K0PIR

  4. K0PIR says:

    Hi John,

    Nice to hear from you and thank you for commenting here. Thank you so much.

    This may help you. For RTTY (FSK) it needs to be in RTTY mode. There must be something wrong in the DM780 setup in yours or the radio. I will have to do a short clip on DM780.

    In DM780 Program Options>Modes+ IDs>RTTY. Enable FSK Keying, use the second COM port you have for the 7610 USB cable (not the COM port used for rig control). Under devices use Rigblaster Pro, Icom(DTR). My 7610 screen captures are here.

    I have a couple of articles on FSK and the 7610, one for N1MM and the other for Winwarbler:

    Thank you again and best 73,
    Rich, K0PIR

    • John Farrar says:

      Hi Rich
      Thank you for your info but I found that the wrong com port was being used so OK now thanks.
      73 John

  5. Jim Painter says:

    Hi Rich, I’ve been watching your videos concerning HRD with the IC-7300 in CW mode. HRD and DM780 work fine in receive mode over the USB cable. The problem is getting the macros to transmit. I ordered a CI-V cable from Amazon. HRD controls the radio fine (as before). DM780 reads CW fine but still no transmit macros. I am struggling with configuring the software to use both cables. The USB is VCOM 5 and CI-V is COM 3. Do the USB and CI-V need different CI-V addresses?
    Thanks and 73
    Jim KQ3S

  6. K0PIR says:

    Hi Jim,

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

    Try using just the USB cable for HRD Rig Control and for DM780 you can use the USB Audio CODEC for the soundcard. You can use the CI-V cable for WSJTX or another similar program later.

    If You still want to use the CI-V cable and the USB cable with HRD, then use the CI-V cable for rig control and the USB cable for data modes. That was the way I was doing it so I could transmit RTTY FSK.

    I would get the data modes working first, like PSK 31. Are you able to transmit using PSK31?

    To transmit CW you will have to use CW(Ky) in DM780 or use a CW Interface. See my latest post.

    CI-V addresses do not need to be changed.

    Rich, K0PIR

  7. Jaap Dorhout says:

    Hi Rich,

    just installed HRD 6 on my computer.
    CW works decoding and sending but I have a delay of 2 seconds when sending CW to my 7610
    Do you know where I have to look for solving this delay

    73 Jaap PA5JD

  8. K0PIR says:

    Hi Jaap,
    It is nice to hear from you and thank you for commenting.

    I am using a CW interface cable that plugs in to the back of the rig CW Jack. There is no delay with that cable. I have used a Winkeyer and again no delay.

    Even if you are using just the USB cable to the 7610 that sounds like a long delay. The default settings in HRD should not cause that. Have you tried restarting your computer and only opening HRD and DM780?

    Thanks again and I hope all is well where you are, best 73!

  9. Jaap Dorhout says:

    Hi Rich I find out that the delay problem came from the DATA 3 MOD setting….
    First I put it also on the MIC, USB setting but I find out that this gave the delay of 2 seconds.
    After I swichted to LAN there was no delay by sending CW with DM780.
    Problem solved for now ? 🙂
    Thanks Rich for all your good work for explaining and posting the nice helpfull videos for the 7610

    73 Jaap PA5JD

  10. K0PIR says:

    Thank you so much and thank you for posting the solution. Best 73!

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