Hey team,
I have a recently purchased digirig and icom cable set that’s working fine for AFSK modes - and I’m primarily using FT8.
I haven’t tried - but curious from the community if the stock cables are wired so that I can do true FSK keying for old-school RTTY on my 746pro.
Thanks in advance.
John, n4tii
John,
With sound card based interfaces like Digirig, the radio doesn’t have to understand anything about the digital mode being used. Just switch the mode to RTTY in FlDigi.
Oh I understand I can send AFSK-based ritty with it - using the digirig sound card to generate the mark and space… but the rig is capable of generating its own provided the interface is setup to trigger those lines on the ACC connector. I was curious if the cable is wired so that if I configure something like MMTTY to leverage toggling RTS and DTS for mark and space, will it do it?
For example, I had an old “Buxcom Rascal” - he’ll tell the radio to send FSK in rtty mode on the radio.
There is no particular benefit for using radio’s internal interface if more capable external interface is connected, but it can be done. When the internal TNC uses serial data connection, you can interface computer with it through Digirig’s serial port.
I’m running the icom 746pro with my digi rig. I cant get RTTY to work using N1MM and MTTY. All I get is the carrier tone but no shift. Ive tried multiple support site and no solutions. Im using a virtual serial port program to handle the 2 software’s. If anyone could help withthis setup.
That sounds frustrating. Don’t expect much help during the RTTY Ops WW RTTY contest. Responses may improve next week, and I hope someone has a good solution for you.
FWIW, when I could not get N1MM and MTTY working, the Digirig was not the problem. I could decode RTTY, but nothing else.
N1MM+ seemed to make it difficult to use fldigi in place of MTTY, so at that point I stopped. I can use fldigi easily for TX and RX of RTTY. So can you, if you are willing to give up the contest features of N1MM+.
If I were to go after it again, I would start with understanding how to use MTTY by itself, and build upon that. Or dump it and ask questions about how to make N1MM+ and fldigi do RTTY together.
73 Constrainted
I do not own your radio. Based on the earlier comments, Denis @K0TX seems to have a good understanding about how to choose software for your goal of RTTY.
73 Constrainted
Since I was the originator of this this topic several months ago, here’s my findings:
If you are using DigiRig and want to use the IC-746pro in its native RTTY mode (RTTY mode on the radio - narrow filters, the radio itself generates the mark and space) you can’t do that. You need different hardware. You can receive, of course, but the digirig is not going to do the FSK keying.
You CAN use digirig to run RTTY in AFSK mode. Just like every other digitial mode, the digirig generates the tone and they are transmitted in SSB mode (USB or LSB depending on how you configure MMTTY or other program).
If you want true FSK keying, you need to buy or build another interface. In my case, I used a “WinKey” and built a cable to go from the Winkey’s interface to the ACC DIN port - and found a DIN Y-Cable so that the Digirig AND the WinKey FSK interface could be simultaneously connected to the same ACC port.
Here’s some documentation recommended by the N1MM+ manual:
73 Constrainted