Icom 7300 Easy Transmitter Settings For Digital Operation

In Discussion by K0PIR60 Comments


Icom 7300 Easy Transmitter Settings For Digital Operation is a followup article to my last post, Icom 7300 Receiver Settings For Digital Operation. In this post there are some additional receiver settings.  I have a couple of YouTube videos on transmitter settings, but I hope to simplify and produce one concise video that includes the transmitter settings in the Icom 7300 menu, operating system and then popular software (WSJT-X and DM780).

transmitter settingsLet me mention at the onset, there are many different approaches to doing this. This is a basic tutorial, simple and easy. Follow this and you won’t have any complaints about having a wide signal or using too much power.

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On the Icom 7300 we use USB-D for digital operation. It can be a little tricky at first getting in and out of this mode. Experiment some and you’ll see how it works. If you are in USB mode it’s very easy. To set: Tap the USB button on the LCD with your finger and when the “MODE” menu comes up, tap the DATA button.


In digital operation there has always been the issue of ALC causing poor signal quality. With the Icom 7300 it is less of an issue. I’ve found that I don’t have any ALC deflection most of the time and when I do, it isn’t a bad thing with this transceiver. For more information on this see Page 4-31 of the full manual. It states, “When operating in the SSB data mode, adjust the device’s output level within the ALC zone.”

Some more information on this exists at AB4OJ.com. There is no ambiguity in what he says. Good read!

Icom 7300 RF POWER

Back in the days of Windows 95 and my old Kenwood transceiver I didn’t set my output power on the radio to 100% or 100 watts. I was too scared of it, but I haven’t had any problems using the Icom 7300 and I’ve used Windows 7,10, MacOS, and Linux. I set the RF POWER on the radio to 100%. To set: Push in the MULTI knob on the radio. Tap RF POWER with your finger, using the MULTI knob again, turn it and and set RF POWER to 100%. Chances are you already have it there.

Icom 7300 Internal Menu Transmitter Settings

Under MENU>SET>Connectors there is an important transmitter setting, but let me mention a receiver setting first.

ACC/USB AF Output Level controls the amount of audio the Icom 7300 sends to your software. Mine is set to 50%. Turn it up too high and the waterfall in DM780 will have too much noise. Turn it down too low and you will have a dark waterfall. It’s worth experimenting with. When adjusting, look at your DM780 waterfall and adjust the level up or down. There is a short delay for the adjustment to appear in the waterfall. You won’t notice it as much in the WSJT-X waterfall, but you’ll see a difference in the receiver level meter in the bottom left hand corner.

USB MOD Level: This is important to your power output and having it too high will cause problems (possibly too much ALC). Too low and you won’t have any power output. Mine is 40%.

The other settings under “Connectors” will be in the video.

Operating System And Transmitter Settings

In the video below I’m using Windows 10 Pro. I almost always use two cables, a CI-V cable for rig control and a USB cable for the digital modes. However, this is not important here because we are mainly dealing with the USB cable, USB Audio CODEC and digital mode operation (audio to and from the 7300).

In Windows 10 “Playback devices” the USB Audio CODEC controls the amount of audio going to the Icom 7300. This is similar to the USB MOD Level in the radio. Too high, it’ll be a problem and too low, you won’t have power output. Mine is 40.

Let me mention “Recording devices” here also and the USB Audio CODEC. “Recording devices” controls the audio coming from the Icom 7300 to your software. This is similar to the ACC/USB AF Output Level in the radio. Set it too high, your waterfall will have too much noise, too low and it’ll be a dark waterfall. Mine is set to 40.

Ham Radio Software For Digital Operation

In the video below there are a couple of examples, WSJT-X and DM780. Setting the power output is fast and simple using just the power slider.

So, if I’m using PSK31 and have my power at 20 watts and I’m not making any contacts, it’s very easy to move the slider up and increase power to 30 watts. There is a great example of this in the video.




  1. thanx for you you tube videos. Still having problems with my 7300 staying keyed, would appreciate suggestions. Using the pi and 7300.

    1. Author

      Hi Gail,

      I have used the Pi with Fldigi and WSJT-X. I may have had a problem with keying in the beginning and usually it is an issue with RTS or DTR. Have a look at my radio settings here: http://www.k0pir.us/files/7300screenshots/20170919_221417.png
      Note USB SEND is RTS.
      Also, http://www.k0pir.us/files/7300screenshots/20170919_221353.png
      DATA MOD is USB.

      Here are all of them: http://www.k0pir.us/files/7300screenshots/

      See if checking or unchecking RTS in the software has any effect too.

      Rich, K0IR

  2. I am NOT seeing the USB codecs at all when I try to set up WJST for the FT 8 mode ?
    Do I need to do ANOTHER USB driver download to get these ?
    Every thing was working just fine until i did the 1.20 firmware update to my icom 7300 ?

    THANKS in advance for ANY help to my problem!
    Steve / N7DPX / Lakeside,AZ.

    1. Author

      Hi Steve,

      Thanks for commenting. Sounds strange and I haven’t heard firmware causing that problem. If you were using it before, another download shouldn’t be necessary.

      How about in Device Manager, do you see the USB Audio CODEC under Audio inputs and outputs? If it’s there, then maybe it’s just WSJT-X not seeing it.

      Rich, K0PIR

      P.S. Restarting Windows may be called for 🙂

    2. Hello OMs .. i have the same problem .. any solution ?
      73 de thomas

      1. Author

        Hi Thomas,

        Nice to hear from you.

        How about in Device Manager, do you see the USB Audio CODEC under Audio inputs and outputs?

        Rich, K0PIR

  3. Hi Steve –

    On the 7300’s “Band Stacking Register”‘s screen there is a “button” “GENE” and a button “F-INP” ??

    What do these button do??

    Thanks, Wes AI4FH.

    1. Author

      Hi Wes,

      That’s a very good question. I’ll bet many, like myself, overlook that GENE button. It’s for general coverage. You could use it for broadcast or shortwave listening.

      F-INP is to enter a frequency. You can set the frequency without rotating MAIN DIAL by directly entering it on the keypad.

      Band stacking and the Memo pad are two good tools to use.

      Thanks for coming by and thank you for commenting.

      Merry Christmas and 73’s,

      Rich, K0PIR

  4. Thanks Rich, very helpful. If setting filter 1 to 3.6 & then selecting usb-D, isn’t that the same as just using USB with filter 1 @ 3.6?

    1. Author

      Hi Trent,

      Put the radio in USB-D and then change the FIL settings to 3.6K. That will leave USB alone.

      It’s a slight improvement.

      Rich, K0PIR

  5. Hi Trent,

    This may be in the same realm as Riches question. On 20 meters, the only modes that are available are USB-D and LSB. I just got the 7300 and I’m sure this is operator error but I haven’t found it as yet. Any thoughts?
    Thanks in advance! Gary W4BVD

    1. Author

      Hi Gary,

      Touch the USB-D on the LCD and then touch DATA. That will put you in USB mode. Is that helpful? I’m not sure I understand the question.

      It’s a little confusing at first going between the two.

      Merry Christmas,
      Rich, K0PIR

  6. Thanks Rich. I found the problem. There as a little dot next to the filter indicator. I adjusted the size of the filter and the dot went away and USB came back. HA! Lots to learn. What a fantastic radio.

    Thanks so much for your kind help! Merry Christmas to you as well.


  7. greetings rick
    my problem is the following, I used the version rc 1 of the program when going to any of the other versions the cat stops working.
    I still do not understand why, I’m using an icom 7300 and everything works perfect until I want to update to the next version. In this case 1.8
    any ideas?
    Manu Zp9mce

  8. Hi Rich. I have everything set up ok but have one problem. My 7300 keys but I have no modulated output. It just sits at idle while the pgm shows the text being sent. HELP? HI-HI

    1. Author


      Thanks for commenting and do you have DATA MOD set to USB in the radio? Do you have power output set on the radio and in the software?

      What software are you using?

      Rich, K0PIR

  9. Rich,
    I am having the exact same problem as Anonymous above. I’ve gone through your YouTube Videos on setting up the IC-7300 on FT-8. Software up and running. I’m decoding stations, but when I double click on a station calling CQ, no power out from the radio, though the radio is going through the tx sequence. I’ve set up all the connection settings you have listed. I’ve run psk-31 and RTTY for years using my Kenwood TS-440SAT with no problem so don’t think it’s computer problem. Also I’m using SignaLink USB interface with the proper USB codec selected. tnx es 73 Harvey, KM4JA

    1. Author

      Hi and thank you for commenting.

      That’s the problem. Remove the Signalink, because it isn’t needed with the Icom 7300.

      All you need is the USB cable and of course, install the USB driver from Icom before attaching the USB cable to the radio. After that it’s just a matter of setting up the COM port and the USB Audio CODEC for input and output.

      The 7300 is the best radio I’ve ever used for digital mode. Up until the 7610 of course 🙂

      Best 73,

      Rich, K0PIR

  10. Question for both transmit and receiving

    I see that there are many settings for both xmt and recv. I believe I can handle this but what concerns me is changing back and forth between USB-D and SSB,

    Is just changing that function all that is needed or are any of the the other settings also need to be changed too?


    1. Author

      Hi Paul,

      Nice to hear from you and that’s a great question.

      One of the things I like is when in USB-D I can increase the bandwidth on FIL1 to 3.6k and leave it there and when I go back to USB the FIL1 is still at 3.0k. It doesn’t work for everything, but that is pretty nice.

      The things that I normally look at (and usually change) after operating in USB-D mode and then going to SSB are NB, NR, Auto Notch and AGC. Having NB, NR and Auto Notch on while in USB-D just doesn’t work good. You’ll see black splotches the waterfall. Having AGC on slow isn’t good either when using digital modes.

      It may seem like a lot at first, but I’m used to it now and it’s easy enough.

      I hope this helps.

      Thanks for visiting and signing up.

      Best 73,
      Rich, K0PIR

  11. Hi,
    haven’t seen any screen-shot how to set the mic-gain knob on the TRV. Mine is on 35, but not sure if that’s OK.

    1. Author

      Hi Paul,

      Thank you and great question. In some older rigs it made a difference.

      On the Icom 7300/7610 the mic gain isn’t used in digital modes (USB-D), so it’s okay where it is. When you switch back to SSB (LSB, USB) it will be where you left it.

      Rich, K0PIR

  12. Hi Rich, just curious, but I have read where some amateurs set the record and playback on the computer to dB and to Zero and you suggest using percentage and about 40% and adjusting from there. What are the advantages of using the one method over the other. I am using percentage as you suggested and am having no problems with my 7300 and WSJT-X and FT8. 73, Ray AA4EZ

    1. Author

      Hi Ray,

      Nice to hear from you and great question.

      I don’t think there is an advantage, I played around with it and found good settings so that my ALC wasn’t too high and I could control the power output from the slider in my digital software (DM780 and WSJT-X). That’s the only slider I want to be using when operating. All the others I leave alone.

      I hope this helps. Thanks for commenting and best 73!

      Rich, K0PIR

  13. Hello Rich – Your You-Tube videos are a great relief. I am having problems with N1MM+ and MMTTY . I have the two decode windows open, DI1 rX1 2Tone and Rtty engine 1. I am using a laptop and controlling a ICOM 7300. RTTY decodes 100% but I seem to not be able to XMT anything to the 7300. To validate operation between the 7300 and Laptop, I use WSJT-X. The same laptop and 7300 have no problems. Decodes and XMTs FT8 100%. I am using COM 4 with only the USB cable to the 7300.

    With N1MM+ and MMTTY I only can receive and decode. Do I need to add a second CI-V cable??? Can N1MM+ and MMTTY be operational with only the USB Cable to the 7300? I am frustrated

    Ivars, KC4PX

    1. Author

      Hi Ivars,

      Nice to hear from you and those are great questions. I am assuming you want to operate RTTY (FSK)?? Initially, I used two cables for RTTY (FSK) and it is easy in my opinion. However, you can use one cable (USB) and a serial port emulator (VSPE) if you want. The choice is yours.

      With N1MM Logger we get the Bandscope Waterfall in the software and that only works with using one cable and something like VSPE. So that may be the best choice for you.

      So first, install (VSPE) and get it working. See: https://youtu.be/UtB-DfBMmB0

      Then you will want to configure MMTTY and EXTFSK64. See: http://www.k0pir.us/icom-7300-rtty-fsk-mmtty/

      Let me know how it goes.

      Rich, K0PIR

      1. Hello Rich
        I have VSPE working as per instructions on the Laptop. However I must have done something incorrectly on configuring MMTTY. However I did find it. First of all since my machine is 32 bit, I had to change config from EXTFSK64 (when set did not show new window) to EXTFSK (window came up okay). Then I could not transmit when port was set to COM4. when I changed it to COM8 all worked. I now have mmtty working as a stand alone. next is to get it working with n1MM

          1. Hello Rich
            I elected to go to the two cable approach for my 7300, N1MM and MMTTY config. Since my Lenovo T520 has one USB output, I connected a usb hub and have both CI-V and USB cables from the 7300 going to the HUB.
            MMTTY by itself controls the 7300 using COM4 in the EXTFSK 1.06 Window. Receive and XMT works fine.
            My problem is with N1MM+. When opening N1MM and the radio is set to RTTY, the panel opens up “Contact Mode (RTTY) Contest modes (Mixed). The other windows that are open are: EXTFSK 1.06; RTTY Engine 1; DI-1RTTY Mode – Soundcard (MMTTY) and a beautiful Radio 1 Spectrum Monitor. I can set the Freq via the control panel.
            Now that you have all that info, the problem is the EXTFSK 1.06 window. Port setting is COM4 but the status says RED outline with Status NG. I tried to transmit but nothing on the 7300. I set the port to COM3 and Status says OK. I try to transmit and still nothing on the 7300???
            What could be set incorrectly ??? with MMTTY running by itself with COM4 in the EXTFSK 1.06 window – all is okay. When N1MM is running – no transmit with either COM3 or 4.
            I am stuck – do you have a suggestion?

          2. Author

            Hi Ivars,

            Good to hear from you again.

            With two cables you will not be able to run the spectrum monitor. Close the spectrum monitor and you will have to go in to N1MM Config and verify you have the ports setup correctly. The CI-V is used for rig control, The Icom 7300 will be next to it in the list.

            The alternative for N1MM and RTTY (FSK) is to use something like VSPE. With that you can have use of the spectrum monitor. See: https://youtu.be/UtB-DfBMmB0

            Thank you again,
            Rich, K0PIR

  14. hello,
    using ic7300 and wsjt-x,in ft8-mode,I only can decode the stations,when I send I can here the output and the tx-led lights,but I never get a connect.

    1. Author

      Hi Gunter,

      Look at the Soundcard under the Audio tab in WSJT-X and see if it is using the USB Audio CODEC for both input and output. Also you can check the radio menu under Connectors, is DATA MOD set to USB? DATA OFF MOD should still be MIC,ACC which is the default.

      Rich, K0PIR

  15. Hello Rich
    in your video :Icom 7300 SP RTTY FSK Setup MMTTY N1MM How to” you show your 7300 “connector” page 2/4. What are the correct setting for page 1/4? Top of page is ACC/USB Output Select”

  16. Hello Rich
    First of all, many tanks for your assistance. I have looked at all screen shots and have set up the 7300 as per instructions. What I am confused is the CI-V cable and the port designation in my Laptop. Going to the device manager I do not see where to set up the port? What I am trying is to set up N3FJP 6.1 and WSJT-X both running with the two cables. N3FJP only shows Com3 and Com 4. Com4 is used with WSJT-X at 115200 Baud.
    I cannot poll 7300 with N3FJT Software, Do I need to run VSPE.
    The real question is under Device Manager, where do I see the CI-V cable com port

    1. Author

      Hi Ivars,

      It’s nice to hear from you,

      I used the CI-V cable for the N3FJP software and then I used the USB cable for WSJT-X. It sounds like you are trying the same.

      Did you install the software driver for your specific CI-V cable? Unplug the CI-V cable from the computer and look at device manager. Make a note of what COM ports are there. Then plug the CI-V cable back into the computer and look at device manager again. You should see an additional COM port.

      Rich, K0PIR

      1. Author

        That’s it! If you have the radio setup for Unlink from [REMOTE] in the CI-V menu, you can control the radio from either program. The CI-V Baud Rate is also in the CI-V menu.

        Rich, K0PIR

      2. Many thanks for your information and videos. You are a great teacher. I now have N3FJT working with JTAlert and WSJT-X and logging. One problem, Mode in N3FJT logs FT8 contacts as SSB. Who and what needs to be notified to log as Digital or FT8. My 7300 is in USB-D mode.

        1. Author

          Hello and thank you for commenting.

          I know N3FJP will indicate SSB while I am working a contact. It never goes to FT-8, but when a contact is logged it does show up as FT-8 in the log. Have you logged a QSO?

          That is strange, I haven’t had that problem. Does WSJT-X prompt you to log the contact? There is a setting in WSJT-X. Go to File>Settings>Reporting. Under Logging check “Prompt me to log QSO”.

          When it prompts you, in the prompt window, what does it show for Mode? It should be FT-8.

          Rich, K0PIR

          1. Got it working fine when I set WSJT-X to prompt me to log contact. It shows FT8 and then changes N3the FJP to proper mode. What thru me was when you click on a CQ, WSJT populates the N3FJT window with call and SSB as mode. Then when you log contact, it modifies Mode when logging. When I do not use WSJT prompt to log, and use N3FJP Log button, N3FJT Logs contact as SSB. When I use WSJT Prompt to log, it logs FT8. Hope this helps
            All is working, thanks

          2. Author

            FB and thank you for commenting. Great to hear it is working for you. N3FJP is great and I love his other software for Field Day. All of it is easy to use and works good. Glad you got it and 73!

            Rich, K0PIR

  17. Hi HI Rich, Question about the FT-8. In the waterfall there is a drop down box and you can set it for
    current or cumulative. What if any is the difference??
    Thanks for the Icom 7300 video’s and I am well pleased with my 7300 as well.
    Gerry kd8rfo 73

    1. Author

      Hi Gerry,

      Hello and thank you for commenting. That’s a very good question. I went by what is on the WSJT-X site and honestly haven’t changed it before now.

      From the website:

      Select Current or Cumulative for the spectrum displayed in the bottom one-third of the Wide Graph window. Current is the average spectrum over the most recent N Avg FFT calculations. Cumulative is the average spectrum since the start of the present UTC minute. Linear Avg is useful in JT4 mode, especially when short-form messages are used.

      I’d have to take a closer look, but I see no difference at the moment. I use Cumulative.

      Good question.

      Rich, K0PIR

  18. I got my 7300 a few days ago, and followed the config directions. I’m only using the USB cable, with FlDigi and WJST-x. Everything seems to work fine. I have rig control, I am receiving audio, but I am not sending audio. I’ve verified that I have the correct sound card chosen, and I’ve triple checked the Icom settings to make sure, but I seem to be missing something.

    I’m totally scratching my head here.

    Thanks for any input.

    John KG5OIB

  19. I finally figured it out…. I was expecting to see audio on the “S” meter. But when I wen to the Audio meter, it was all there. D’oh!


    John KG5OIB

    1. Author

      Hi John,

      Sorry I didn’t get the chance to post earlier, I have been out of town.

      Glad you got it and I hope it is working well for you. I love it, so simple and reliable once I figured things out.

      If you use the MONITOR on the 7300 you can hear the audio output. I find it helpful hearing my transmission at times and watching the power meter.

      Thank you for commenting and have a great time.

      Hope to hear you on.

      Best 73,
      Rich, K0PIR

  20. I am trying to use wsjt-ft8 with a 7300. I have followed all of the videos and instructions ( i Think) With USB-D and filter 1 at 3.6 selected when transmitting it changes to usb and to filter 2 and remains their until I physically change them back, how do i stop this?. Second question , should I be in linked or unlinked to remote. My cat does not operate in linked to remote ? is this a problem?

    Thanks for your help and videos

    1. Author

      Hi Frank,
      It’s nice to hear from you.

      Look in WSJT-X settings and see if you are using Data/Pkt for Mode. Also look at Split Operation and see if you are using Fake it. I have found that “Fake it” is easier most of the time.

      Unlinked is the way to go for most operations and it will work with everything. When N1MM Logger+ (and other programs now) came out with their Spectrum Monitor Display, unlinked is needed.

      I hope this helps, let me know.

      Rich, K0PIR

  21. Hi Rich,
    Your comments fixed me right up. I also found that not using Omnirig for the radio was a help. Thanks a lot for your help and all that you do for the hobby.

    Frank W2GC

  22. When using WSJT-X or JTDX my 7300 takes almost 5sec to switch to transmit. I must be missing something. Any suggestions?

    1. Author

      Hi Rich,

      Nice to hear from you. Thanks for commenting and thanks for the question.

      That is a long time. What are you using for the Rig in WSJT-X?

      Rich, K0PIR

  23. Hi Rich,
    I am using the WSJT-X program to transmit on FT 8 using my IC 7300. I am able to receive just fine, but when I go to transmit I have no output power. I have configured the settings as you described in your video and have confirmed them with your screen shots. Any idea what I am doing wrong?

    1. Author

      Hi Dave,

      Nice to hear from you and thank you for the e-mail.

      It is probably just a setting. Did you verify the settings in the radio? DATA MOD = USB

      Verify you have selected the USB Audio CODEC for the Audio Soundcard in WSJT-X settings.

      What happens when you hit the TEST and the TEST PTT in the WSJT-X Radio tab?

      What happens when you hit the Tune button in WSJT-X, does it turn red and do you see the radio key up?

      To hear your own signal you need to have MONITOR turned ON in the radio. Otherwise you’ll just see the radio go into TX and not hear anything. You should still see power on the Po scale.

      Let me know,

      Rich, K0PIR

      1. Hi Rich,

        The problem was the power setting was set to low, so when I activated the tune button there was no power output even though the radio would key up. Raised the power level and everything started working.
        Dave, K8KPU

        1. Author

          Fantastic Dave. Glad you got it working and thanks for commenting.

          FT8 is a fun mode, hope to hear you on the air!

          Rich, K0PIR

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